Mazda MX-5 Superlight Concept

Mazda MX-5 Superlight Concept

The Mazda MX-5 Superlight Concept is an answer to the world of automobiles and individual mobility moving towards energy efficiency, environmental compatibility and uncompromised safety - along with dynamic attributes and driving fun. In its efforts to offer pure driving enjoyment, while meeting its ecological and social responsibilities, Mazda has been focusing on weight reduction as a core base technology. For 20 years, reducing weight has been a tradition with the Mazda MX-5. It provided the inspiration for the radical design of Mazda's latest show car and its radical interpretation of the cult roadster.

This year Mazda celebrates the 20th anniversary of the first Mazda MX-5 roadster, which laid the cornerstone for its Zoom-Zoom brand philosophy - reason enough for Mazda designers to create a fully-drivable show car, the Mazda MX-5 Superlight Concept. There are no plans to build this car, but it demonstrates how individual mobility can be maintained in a way that uses fewer natural resources.

Mazda's European R+D centre in Oberursel has created a show car that represents the essence of Mazda's fun-to-drive aspect. Based on the brand icon Mazda MX-5 Roadster, the Mazda MX-5 Superlight Concept is a pure, uncompromising two-seat sports car meant to be affordable to just about anyone. The main challenge for the design team in creating this roadster was "to evolve the MX-5, developed to perfection during the last 20 years, to a higher and extreme level," says Project Lead Designer Hasip Girgin. The result of their efforts is a roadster show car with an exciting design that is especially lightweight and distilled down to the very basics of sporty driving, that still manages to provide modern safety technologies. In an increasingly digitalized world, it creates a linear, direct bond between man and machine. Its conceptual purity means even better driving dynamics and fuel efficiency, which is accomplished by keeping the vehicle below the 1000 kg threshold. As a show car for lightweight construction and driving enjoyment, the Mazda MX-5 Superlight Concept is the ideal ambassador for Mazda's brand values.

Exterior Design

The Mazda MX-5 Superlight Concept was to strengthen these bonds even further. By doing this without a windshield, the retractable top and its frame, designers achieved an important step in this direction. As the Mazda MX-5 Superlight Concept, the allweather production roadster has mutated into a driving machine that lets sports car enthusiasts enjoy the natural surroundings unfiltered and tangible. Not only does the wind blow unimpeded during driving, pilot and co-pilot can also experience the sounds, smells and temperature changes of their immediate surroundings. And finally, the show car's intense bond between the driver and the technology of the vehicle gives it a unique closeness that can only be found in stronger form in the cockpit of a race car.

Mazda designers created special roll-over bars, not only because they are very sporty-looking, but also to contribute to aerodynamic efficiency. These also make it clear that roll-over protection is important in this concept. And they prevent wind turbulence around the heads of the passengers, from whom the law would require the wearing of helmets while driving.

By removing equipment not vital to driving, and by replacing vital things with components that support the unique concept of the vehicle, designers sharpened the character of the Mazda MX-5 Superlight Concept.

Because there is no windshield, for instance, there is obviously no need for wipers. The roadster show car's completely open design makes the need for outer door handles, side windows and their openers unnecessary. A single, filigree aluminium, wide-angle mirror gives a good view of the road behind. It's placed inside an extension of the bonnet. Front and rear lights are the same as those of the production model with additional LED lamps at the front, and brake lights at the back of each roll-over bar, which contribute to the roadster's sporty look.

The lack of a windshield required an extension of the original aluminium bonnet into the cabin. The attached sheet here is made of lightweight carbon fibre and provides a hood for the dashboard frame.

This also changed the proportions of the body's design, making the front of the car longer and the passengers seem like they are sitting further back towards the rear-drive axle, all of which is enhanced by the massive roll-over bars and their aerodynamic cladding. The Mazda MX-5 Superlight Concept translates the dramatic proportions of historical race cars into a very modern form.

Interior Design

The purity in design of the exterior also characterizes the interior design, which does not have aesthetics as ultimate goal, but was conceived to contribute to reducing vehicle weight. Driver and passenger of the Mazda MX-5 Superlight Concept are greeted by racing bucket seats made of ultra-lightweight carbon fibre. They are slide adjustable and upholstered with the same saddle coloured leather as the armrests, the steering wheel, and the lightweight aluminium shift lever and hand brake. Colour-coordinated four-point seatbelts hold the driver and passenger firmly in their seats.

The bonnet extension into the passenger cell provides a canopy for the dashboard, which makes the dashboard look smaller than the production Mazda MX-5. Made of lightweight plastic reinforced with fibreglass, it contains the same instruments as the production Mazda MX-5. These are held in place by a dashboard frame made of lightweight carbon fibre. Like a purebred race car, the Mazda MX-5 Superlight Concept has an ignition button in the centre of the dashboard, along with two emergency kill buttons for immediate fuel and electricity cut-off.

Supplying air and climate control to the open passenger compartment is only possible in limited form, so the show car has no air conditioning and no fans. Air-flow is increased when the roadster accelerates, and only small air vents are needed. The interior is made without any trim. Sound insulation mats and rugs do not meet the requirements of a purist roadster like this and are not used at all.

Made of ultra-lightweight carbon fibre is the "floating-design" centre console with iPod adaptor and the triangular reinforcements in the trimless doors. Driver and passenger can rest their arms here while driving.

Driving Dynamics

The Mazda MX-5 Superlight Concept is fully-drivable, but there are no plans to produce it in the near future. Under the bonnet is the cultivated and frugal MZR 1.8-litre four-cylinder engine paired to the production roadster's five-speed manual transmission. It develops 93 kW/126 PS of maximum power at 6,500 rpm. For an appealing engine sound, there's a Mazdaspeed cold-air intake made of polished and powder-coated aluminium and a Mazdaspeed exhaust system, both of them specific to the Mazda MX-5 Superlight Concept. These systems deliver more intake air-flow, and less exhaust-gas back pressure.

The engine sound is designed to suggest an engine with much higher displacement than the concept actually has. During charge cycles, a high-resonance bubbling sound in the muffler delivers the exciting sporty sound you expect from a very powerful engine.

The show car is designed to provide improved driving dynamics as well, and uses a four-piston, fixedcalliper brake system with perforated discs that, because of their size required an increase in track of 50 mm. A specially tuned chassis with a Bilstein B16 coil-over suspension and Eibach estabilisers give the body of the Mazda MX-5 Superlight Concept a ground clearance that is 30 mm lower than the production Mazda MX-5. Its sporty hydraulic power-assisted rack and pinion steering system is the same as that of the regular roadster. Its linear steering, coupled to a precise-shifting five-speed manual transmission with short shift travel, have contributed to the character of the world's most successful roadster for years.

Technical Specifications

* Body Type : Roadster Monocoque
* Seating capacity: 2
* External Dimensions
o Overall length: 4,020 mm
o Overall width: 1,720 mm
o Overall height (unloaded): 1,110 mm
o Wheelbase: 2,330 mm
o Track (front/rear): 1,540/1,545 mm
o Ground clearance: 106 mm
* Engine: MZR 1.8-litre petrol
* Max. power: 126 PS (93 kW) at 6,500 rpm
* Max. torque: 167 Nm at 4,500 rpm
* Transmission: 5-speed manual
* Front/rear suspension: Double wishbone/Multi-link
* Damper (front/rear): Bilstein® monotube
* Tyre size: 205/45 R17
* Brake type (front/rear): Ventilated discs/Solid discs
* Brake diameter (front/rear): 300/280 mm
* Acceleration 0-100 km/h: 8,9 s
* Fuel consumption (combined): 6,3 l/100km
* CO2 emissions (combined): 150 g/km
* Min. kerb weight (without driver): 995 kg

Mazda 3 MPS

The next-generation Mazda 3 MPS is one of the world's most powerful front-wheel drive compact cars. It takes the all-new Mazda 3 hatchback as its base and raises it to new levels of driving excitement with an updated MZR 2.3-litre DISI turbo petrol engine, increased body shell rigidity and an evolved suspension. To this it adds exclusive design cues and materials to deliver a next-generation compact flagship that is even more fun to own and drive than the current model.

On top of its high performance level - one of the best in the category - the all-new Mazda 3 MPS was developed according to Mazda's long-term vision for technology development. Advanced Mazda engine and catalytic converter technologies mean the new model has an optimized power delivery, uses less fuel, and has cleaner emissions than the previous Mazda 3 MPS model.

Design - A More Expressive and Dynamic Design

The design theme for the all-new Mazda 3 called on the development team to evolve the model's visual identity to create a sportier, more aggressive appearance. The end result is a more emotionally appealing design that takes the sporty, agile compact nature of the all-new Mazda 3 hatchback to a new level of sporty refinement.

Exterior Design

A new air intake for the intercooler is introduced to the centre of the all-new Mazda 3 MPS bonnet, hinting at the power underneath. The front fender and front bumper designs are exclusive to the MPS, while subtle intonation added to the surface and character lines give the exterior an expressive and dynamic flair. The front grille and lower bumper sections share the same black metallic paint finish. These are framed by cylindrical bi-xenon headlamps and round fog lamps, to underscore the car's premium character.

Mazda 3 MPS
Silhouette and rear end

At the sides, subtle wedge-shaped and curving side character lines, along with a side under spoiler, accentuate the car's sporty, low centre of gravity. The view from the rear features a large floating rear spoiler (depending on market) that balances out the tight look begun by the new front end and adds to the compact's aggressive image. LED tail lamps have an inner lens that adds a sense of greater transparency when the lamps are not lit.

One the segment's best for aerodynamic performance

Beginning with the all-new Mazda 3 5-door hatchback, which has one of the segment's lowest coefficients of drag, MPS developers added a number of exterior features optimised for aerodynamic efficiency. These include the large front and rear bumpers, a large floating rear roof spoiler and front under spoiler. The result is aerodynamic performance that provides stability and easy control when travelling straight, changing lanes, or overtaking other vehicles at high speeds. The shape of the A-pillars and door mirrors were also designed keeping aerodynamic efficiency in mind, while increased rigidity around the door sashes, delivers improved sealing of the doors to reduce wind noise.

The Wheels and tyres

Mazda introduces all-new 18-inch (18 x 7.5J) aluminium alloy wheels designed exclusively for the Mazda 3 MPS using the same design theme as the Mazda RX-8 wheels. These have a strong, three-dimensional form that helps the car look nimble and aggressive when seen from the side.

The Interior design

Front seat area
The dashboard of the new Mazda 3 MPS is designed to give a roomy feel at the front. This is combined with a large centre console and a driver-orientated, wrap-around cockpit with just the right feeling of snugness. Exacting calculation was applied to designing the slant of the centre console and in positioning the gearshift lever closer to the driver.

New turbo boost gauge
The hoodless independent blackout speedometer and tachometer express sportiness through their design. The tachometer features a red MPS logo and a needle that travels 260 degrees as opposed to the 190-degree rotation on other Mazda 3 models. The instrument cluster for the all-new MPS also includes an LED turbo boost gauge positioned between the meters, which heightens the car's high-performance feel.

Semi-bucket front seats
The all-new MPS provides semi-bucket front seats for a great fit and exceptional torso and thigh support, a real must in a car this sporty. The front edge of the seat cushions is enlarged to improve the fit under the thighs, and the seatback length is extended to provide greater support. The MPS upholstery features an exclusive black base colour with a red graphic design and red stitching.

Materials and colour
Developers were careful in selecting materials and surface finishes for the interior that will excite the driver and passengers every time they take a seat in the car. Black is the keynote colour employed throughout the interior, while the seats and trim fabric have an organic red graphic design. This MPS-exclusive design is distributed throughout, with red stitching enhancing the sporty interior character on the steering wheel, seats, door trim, shift lever boot, and centre armrest.

Powertrain - Exhilarating Driving and Euro Stage V Compliance
The power and easy-to-control torque characteristics of the new Mazda 3 MPS turbo petrol engine are combined with an optimised gear ratio that ensures smooth shift operation for sporty driving. This is matched to a stiffer body, a suspension system with greater damping strength, Mazda's electro-hydraulic power assisted steering (EHPAS), as well as specially tuned brakes. Together, they deliver a high-performance package with precise, controllable handling, and powerful braking that is fun to drive on a daily basis.

The Engine - high-performance DISI technology
The all-new Mazda 3 MPS is powered by Mazda's MZR 2.3L DISI Turbo, a high-power inline 4-cylinder petrol engine. This acclaimed engine has been further refined and now delivers a maximum output of 191 kW/260 PS at 5,500 rpm and the same generous maximum torque of 380 Nm at 3,000 rpm than the current model. This represents one the world's highest level of performance in a front-engine front-wheel drive sports compact.

High-performance compact
Pairing direct-injection with a turbocharger allows the engine to achieve performance that is on par with a larger displacement engine. Realising the right balance between lightweight and high rigidity through the effective use of high-tensile steel sheeting - including 1,480 MPa ultra-high tensile steel - means the new MPS body shell easily supports the top speed of 250 km/h and acceleration of 0-100 km/h in just 6.1 seconds.

Reduced fuel consumption and Euro Stage V
Yet, the new Mazda 3 MPS also delivers surprisingly good environmental performance and fuel efficiency for a car with this kind of power. Optimised aerodynamics helps reduce fuel consumption from 9.7L/100 km on the previous model to 9.2L/100 km on the all-new Mazda 3 MPS. Also newly introduced is the world's first single-nanotechnology, fast-reacting catalytic converter under the floor, which delivers cleaner emissions and Euro Stage V compliance.

High torque from direct-injection
The latent heat of vaporization generated by the MZR 2.3L Turbo when atomized fuel is injected directly into a cylinder at pressures of up to 11.5 MPa reduces the temperature in the combustion chamber (in-cylinder cooling effect) and improves air-fuel mixture charging efficiency. When compared to turbo engines injecting fuel via regular intake ports, this approach increases torque of the new Mazda 3 MPS by up to about 10 percent at around 3,000 rpm. This realizes a smooth flat torque profile with plenty of power that is easy to control using a single-scroll turbo charger. The intercooler is the same size as on the previous model, but the new air intake mounted on the hood delivers a supply of cool air that better ensures stable cooling performance.

The Advanced torque management
The stiffness of the left and right drive shafts is optimized to minimize torque steer. Engine optimizations help to make this powerful, high-torque front-wheel drive vehicle easier to handle when enjoying a sporty drive. These measures include intake volume and boost pressure control that suppresses sudden torque peaks for smoother, more linear torque characteristics and steering angle sensors (all gears).

6-speed manual transmission
The transmission of the new Mazda 3 MPS uses a compact, three-shaft design that keeps the overall length the same as a 5-speed manual transmission. It uses a wide gear ratio setting that can fully exploit the wide torque band of the DISI Turbo engine, with a sixth gear that contributes to a quieter ride and improved fuel economy when driving at high speed. Each gear is set to a higher speed total gear ratio than on the previous model. Of particular note is the natural feel of shifting between first and second gear as the car picks up speed, as well as the smooth feel of successive shifts while accelerating.

Triple-cone synchronizers for first, second and third gears and a double-cone synchronizer for fourth gear optimize the amount of strength required to make shifts and establish the right balance between a short, responsive stroke and pleasing feel to gearshift operation. In addition, the transmission uses low-viscosity fluid, which greatly reduces the effort required for shifting when the engine is cold.

Chassis - Safe and Predictable

High body rigidity and specially tuned suspension

Based on the highly rigid body of the Mazda 3 5-door hatchback, the all-new MPS version adds reinforcements inside the front cowl member gussets to strengthen the joints between the rear suspension towers and rear floorboard, and employs a large tunnel member. These and other local reinforcements effectively increase body rigidity and greatly improve the new model's dynamic robustness.

Suspension system

The coil spring rates for both the MacPherson strut front suspension and multi-link rear suspension are modified exclusively for the MPS. Special tuning to support the high power of the MPS and provide satisfying driving performance also includes the introduction of larger diameter stabilizers than on the new Mazda 3 base model, and an increased span for the stabilizer mounts to achieve greater roll linearity. Special dampers for the MPS increase damping strength and combine with the coil springs and stabilizers to achieve higher roll stiffness than on the base model.

Newly-developed tyres
The Dunlop 225/40R18 tyres for the MPS are wider than on the previous model. By improving the grip of the tyres, the rigidity of their sidewalls and damping strength - along with the systems that bear the input from the tires, including body rigidity, suspension rigidity, and steering support rigidity - the new Mazda 3 MPS delivers response with a more direct feel, and a stronger sense of oneness between the driver and car. The result is a sporty drive that is more precise than on the previous model, even at high speeds. It delivers better response, greater stability and a flatter ride with fewer undulations, even when entering sharp curves or traversing wavy road surfaces. To ensure this, extensive high-speed test drives were conducted at Germany's Nürburgring.

Steering updates and EHPAS
The new Mazda 3 MPS now employs three highly rigid steering gear mount bushings instead of the two used on the previous model. The system also features electro-hydraulic power assisted steering (EHPAS), which adjusts control in accordance with vehicle speed and steering angle to realize precise, solid response for an outstanding feel to steering wheel operation. Control is set for more accurate response to vehicle speed, providing a lighter feeling at slower speeds and a firmer, confidence-inspiring feeling at higher speeds. Steering is direct and sharp at just 2.7 turns from lock to lock.

Robust brakes and new electronic brake assist
Large diameter 320 mm ventilated disc brakes in the front and 280 mm solid discs in the rear combine with an 8+9 inch tandem brake booster and 1-inch large diameter master cylinder to realize powerful and stable braking. Electronic brake assist replaces the previous mechanical system, and four-wheel ABS and DSC are also standard equipment.

Mazda 3 i-stop

The one way Mazda achieved this is to develop unique idle-stop technology that shuts down the engine when stopped in traffic jams and similar situations as a way to reduce fuel consumption.

The Mazda 3 will be powered by the MZR 2.0L DISI engine with green idle-stop technology - Mazda's unique i-stop system. Developed solely by Mazda, it is the world's only idle-stop system that restarts the engine using the remaining energy in the pistons (with a quick help of the starter motor) by injecting fuel directly into the cylinder and igniting it to force the piston down. The benefit of combining a DISI engine with i-stop (originally called SISS: Smart Idle Stop System) is that the system restarts the engine about twice as fast, and quieter, than conventional idle-stop systems.

Combining these two Mazda proprietary technologies and further measures like aerodynamic modifications, help the new Mazda 3 achieve approximately 14 percent lower fuel consumption (combined) than the previous Mazda 3.

When the driver stops the vehicle (red light, traffic jam) the engine stops automatically and sets itself to be ready for a prompt restart. As soon as the driver presses the clutch, the engine initiates the restart procedure automatically. This is a totally neutral operation for the driver.

The Mazda 3 i-stop Green Technology
When stopped at a traffic light or in a traffic jam, shutting off the idling engine can reduce fuel consumption by approximately 5 percent according to European city driving-mode tests. However, the drawback with conventional idle-stop systems is that they rely solely on the use of an electric motor to restart the engine. As such, they require a relatively long amount of time to achieve combustion in the engine when it restarts. In real-world driving, this means a lag between the moment the accelerator pedal is pressed down and the car begins to move, as well as vibration and noise.

The i-stop system for the new Mazda 3 leverages the DISI engine's direct-injection potential for improving fuel economy, restarting the engine quickly and quietly by injecting fuel directly into the cylinder and igniting it to force the piston down and set the crank in motion. The engine is controlled with precision to make this happen:

The Special engine requirements
In order to use combustion energy from the initial stage of restarting the engine, and to start the engine quickly, the following three conditions must be satisfied while the engine is stopped. (1) The engine must be able to inject fuel directly into the combustion chamber and ignite it; (2) an adequate amount of clean air must exist in the combustion chamber of the cylinder where the fuel is to be ignited; and (3) the computer control system must be able to determine which cylinder to fire immediately after starting the engine. The i-stop system, therefore, must use a direct-injection engine that can deliver fuel to the combustion chamber at high pressure, and that can easily ignite that fuel. Mazda's MZR 2.0-litre DISI petrol is the ideal engine to achieve this.

The Controlling piston position
The pistons are stopped in the appropriate position when the engine is stopped, an adequate amount of air is held within the combustion chamber, and the combustion chamber is properly scavenged to reduce the amount of unburned petrol. To this end, piston position is controlled by applying current to the engine's generator while the engine is being shut down. In doing so, it operates much like an electric motor, while using the signal from the crank angle sensor that monitors piston position as control feedback to stop the piston in the appointed position within its expansion stroke.

Special valve and crankshaft balance control
To scavenge the combustion chamber, the new Mazda 3 i-stop system momentarily opens the throttle valve slightly during the shut down process. (The throttle valve is normally closed when shutting off the engine.) Regular crank angle sensors are only able to determine forward rotation, which leaves them unable to monitor reverse rotation or to determine the correct piston position. Mazda's i-stop employs a crank angle sensor that is able to monitor crank rotation in both directions, enabling it to accurately determine the correct piston position. To maintain the proper crankshaft balance when the engine is stopped, it is rotated slightly in the reverse direction.

Faster restart + lower fuel consumption
These measures make it possible to properly inject fuel when the engine is restarted and control ignition advance, thereby allowing combustion energy to be used while the engine is stopped and to restart the engine in 0.35 seconds, roughly half the time required by conventional idle-stop systems. While Mazda's new i-stop system employs combustion energy to restart the engine, it is assisted by the starter for only the first few turns of the crank. This achieves the optimum balance between maximizing fuel savings while minimizing the amount of time required to restart the engine. As a result, it allows i-stop to reduce fuel consumption beyond what would be possible using combustion energy alone to restart the engine.

Driver support communication system
On the new Mazda 3 powered by the MZR 2.0 DISI engine, the i-stop system supports the driver by allowing visual confirmation of engine operation in relation to driving style. There is an i-stop on/off switch on the dashboard, and the driver cluster contains a light that displays "i-stop" when the system shuts down the engine in front traffic lights, for instance. When deactivated, an amber light shows that the i-stop system is not on.

Ensuring reliable operation
The new Mazda 3 i-stop system (only available with the MZR 2.0-litre DISI petrol) is equipped with an auxiliary battery that powers the system in the event that the main battery isn't properly charged or some similar problem occurs. This added control measure ensures that the driver can use the system naturally, without giving it a second thought. In addition, the system does not shut off the engine if the car is stopped on a road with an extremely steep grade, (greater than 14 percent incline).

Mazda MX-5

The Exterior Design: A Fusion of New Mazda Elements and an Unmistakable MX-5 Look
The front grille has been enlarged and changed from an oval shape to the five-point grille that forms part of the well-known Mazda family face. Combined with tautly styled headlights and lowing fog- lamp bezels, the new grille creates a reined and athletic expression.
The five points of the grille are slightly rounded the new shape of the front bumper, with corners that extend downwards, enhances the dynamic look and improves the aerodynamics.
The rear bumper has a new design that makes the rear look wider, sportier, and more integrated into the body. The rear combination lamps inherit the traditional MX-5 elliptical motif, and protrude further outboard for greater aerodynamic efficiency.

The New Wheel Designs
The MX-5 is available with 16-inch and 17-inch aluminium wheels. The 16-inch wheels have five sets of twin spokes for a lightweight look. The 17-inch wheels have 10 twisted spokes for a stronger impression of power and dynamism.

The Interior Design: Higher Than Ever Quality and Driver- Friendliness
The interior design delivers the Mazda MX-5's traditional combination of comfortable snugness below shoulder level and openness above shoulder level. It also reflects customer feedback in the form of enhanced quality and driver-friendly features.
The decorative surfaces on the instrument panel have been changed from glossy piano black to dark silver, which has a subtler, higher- quality look befitting a sports car. The meters have new graphics for higher legibility. The climate-control dials on the centre stack have each been given a silver-coloured ring for a higher-quality look. A protrusion has been eliminated from the outer surface of each door pocket to create more leg space. And the door and centre-console armrests have each been given a soft pad for a better feel.

Evolved Jinba Ittai for Enhanced Fun-To-Drive
The Jinba Ittai feeling on which Mazda has always focused with the Mazda MX-5 defines the kind of spontaneous car-and-driver interaction that anyone can experience whether they're driving the MX-5 in town, on twisty roads, or on an open highway. With the latest facelift, Mazda engineers evolved the attributes in the "driving", "cornering", "braking", and "listening" categories in the fishbone chart to realize performance that lets drivers enjoy the feeling of oneness with the car to an even greater degree.

A 500 rpm Higher Rev Limit Maximizes Engine Potential for Greater Enjoyment
The powertrain has been enhanced to enable the driver to enjoy the full potential of the engine's performance (a key "fun to drive" aspect of the MX-5). Specifically, the speed at which the engine delivers maximum power has been raised from 6,700 rpm to 7,000 rpm (2.0-litre M/T version) and the rev limit has been raised from 7,000 rpm to 7,500 rpm (all 2.0-litre versions). Without these enhancements, the engine feels smooth and linear right up to the rev limit, even with the throttle wide open. With them, however, the driver can really experience the sensation of extracting every single horsepower out of the engine (the enhancements described here apply to the 2.0-litre grades with a manual transmission). The crucial 500 rpm increase in the rev limit is enabled by greater precision in the engine, namely: a forged crankshaft (this ensures the required rigidity at high engine speeds), fully floating pistons and newly designed valve springs.

The Sportier Engine Sound that Responds More Crisply to Accelerator Inputs
The engine sound (a key element in the "listening" category of the MX-5 fishbone chart) is a big part of the sports car experience. With the latest facelift, Mazda engineers made the Mazda MX-5 engine sound even better without causing aural discomfort for people outside the car. Notably, they increased the rigidity of the plastic surge tank in the intake manifold. The optimized surge tank combines with the new forged crankshaft to realize a clearer engine sound throughout the rev range. In vehicles with the six-speed manual transmission, the engineers also adopted a newly developed device called an Induction Sound Enhancer (ISE). This amplifies the pulses that occur when an accelerator input opens the throttle valve to increase air low into the engine, thereby delivering a more exciting sound to the cockpit. The intake sound created by the ISE feels synchronized with the driver's accelerator inputs, so the driver enjoys a crisp, thrilling engine sound even when using the accelerator pedal gently to adjust the revs for a downshift.

An Athletic Design that Heightens Aerodynamic Performance
To improve handling stability, quietness, and high-speed fuel economy, the MX-5 development team drew on Mazda's expertise in incorporating aerodynamic improvements into styling that's faithful to a design theme.
The Quieter Ride in the Roadster Coupe
Given the Roadster Coupe's more upscale positioning, the development team produced a quieter ride by reducing wheel resonance and adding damping and sound-insulating materials, such as urethane filling in the front suspension crossmember and damping material in the front part of the roof. Thanks to these improvements, road noise in the cockpit on a coarse road surface with the roof closed is 2.1dB lower than before. Quietness is further promoted in the Roadster Coupe and soft-top version by stiffer door modules and by newly added reinforcements on the No. 2 crossmember.

Mazda Kiyora Concept

The Mazda Kiyora gives an indication where Mazda could go with a small, eco-friendly city car in the near future. It is highly fuel efficient, with a very small CO 2 footprint, delivering Zoom-Zoom driving fun and high levels of safety. The car achieves this by taking Mazda's acclaimed lightweight strategy to a new level by employing an extremely rigid and lightweight carbon-fibre body structure beneath a small, aerodynamic outer skin and a spirited, small-displacement 1.3-liter direct-injection engine.

Themes for the Mazda Kiyora concept include cleanliness, health and safety. These key aspects are essential for young city dwellers as well as any compact car in the current global environment. The concept was based on Mazda's sustainable technology vision, which aims to ensure customers can continue to enjoy a Zoom-Zoom experience in the future. Water was also selected as a theme for this concept, due to its association with the aspects mentioned above, and the car was named Kiyora (meaning 'clean and pure' in Japanese) to reflect this.

Exterior - Fusing Form with Function
The Mazda Kiyora concept car is formed in the shape of a water droplet on its side, as are its two side windows.
Its diminutive size and low roofline give it a small front cross-section. This is combined with an elaborate underbody that controls wind swirl, a rear roof spoiler, and specially sculptured body lines for a highly aerodynamic form with a coefficient of drag that is over 10 percent lower that of the current Mazda2.

Though small, Mazda Kiyora has a rear boot big enough to carry a large suitcase, a briefcase and a notebook. It is accessible via a liftgate that opens very high (with a low load floor level) for easy loading and unloading, and it's flexible. When the rear seats are not in use, you can push your luggage forward and stow even more, while the strong yet flexible seat material stretched over the seats holds the luggage in place. This system also has the advantage that it hides whatever is stored in the boot from prying eyes outside the car.

The doors and side windows of Mazda Kiyora are fused into a single unit and function as both. These 'windoors' are made of plastic, which provides the same transparency and refraction properties as glass, and the strength of a thin-panel door, but with far less weight. They are also easy to use and practical. Touching the surface of the front tip of the door activates a sensor, which opens the doors up and away from the car, a plus when parking in tight city spaces. They also allow a view into the interior when the doors are closed. But looking into Mazda Kiyora is more than just looking through glass.
The design of the wheels also supports the water theme. Its front spokes are convex and shaped like the blades of a boat propeller, while the concave back spokes are joined to the wheel rim and have a reinforcement that seems to grow out of the spoke itself. Kept very smooth, the wheels of Mazda Kiyora give a twirling, twisting surface articulation.

Interior Design - Visualised 'Nagare' Design and an Expression of Lightness
The interior shapes not only provide aesthetic motifs, they also function to stiffen the passenger compartment with minimal weight. The visible body structure is a real structural element of the car - stiff and crash-resistant. It is indicative of Mazda's approach to conduct a thorough structural analysis to solve complex issues such as safety and rigidity requirements instead of simply replacing materials with more expensive ones. The rear seats that are integrated into the body framework are also examples of this approach. Lightweight materials such as aluminium and a special resin foam, which is under development at Mazda, would be used not only for interior parts such as the instrument panel, but also for the bonnet, tailgate and sections of the chassis. Their effective usage contributes to improving the yaw moment of inertia and reducing the unsprung mass, and leads to superb handling.

The Mazda Kiyora concept has interior shapes that express Nagare 'low' by looking as though they are floating in a current of sea water that is moving from front to back. The instrument panel starts at a single point and lows around the driver and to the right of the front passenger as if it were several blades of sea grass growing out of a rock underwater. The front seats seem to float above the floor, and the arms of body structure twist like sea weed at the sides and top of the cabin. As well as being an integral design element, the door structure also functions as a side member and, in combination with the side sills, would effectively protect occupants in the event of a side impact.

Mazda MX-5

The Exterior design - expressive and emotional styling

A distinctive new front fascia is formed by the 5-point grille and openings at the front corners. These design cues combine with the sculpted shape of the hood and the bold, expressive lines that connect the hood to the front pillars. All the lines seem to flow into the center just below the 5-point grille, which creates a stronger expression of power and dynamism. From the side, the front fender line smoothly morphs into the beltline, clearly identifying the vehicle as a Mazda and communicating dynamism. The line of the side sill curves up and seems to connect with the rear spoiler to emphasize the vehicle's compact size and express its agility. In order to make the surface more expressive, Mazda designers slightly elaborated the depth of the hood edge, front fenders and the three-dimensional shape of the protruding body sides, carefully crafting curves that subtly reflect changes in natural light.

The rear view boasts a sporty design with wide stance. The strongest features are the protruding shoulders and emphasized center-focus design. This concept was carried over from the first generation Mazda 3 and made bolder to represent expressiveness. All the lines of the rear view are designed to concentrate on the brand symbol in the center. The impressive C-pillar design was also inherited from the first-generation Mazda 3 and made more prominent. This was made possible by Mazda's expertise in stamping technology.

The Interior design : sophisticated, sporty, and high quality
The inside of Mazda 3 is a sporty yet highly refined cabin. The dashboard sweeps out from the center toward both sides with dynamic flair as though it is flexing powerful muscles. The large center display and controls are laid out around the driver to deliver just the right feeling of snugness. The angle of the center panel was adjusted after careful analysis of the driver's hand movement, producing a more stylish and dynamic design. A soft, wood grained surface with minimized parting lines on the top of the dashboard enhances the interior quality. The new interactive lighting control enhances the driver's connection with the vehicle.

The Powertrains for all driving experiences
The powertrains combine Mazda's typical Zoom-Zoom driving experience with excellent environmental performance to provide exhilarating driving. They transmit just the right amount of G force that perfectly matches the vehicle's actual acceleration. This provides the driver with a more refined experience of oneness with the car. The new engine line up has been tailored for European customers and now includes the newly developed MZR-CD 2.2-litre turbo diesel engine, carried over from the all-new Mazda 6, in addition to the MZR-1.6-litre and 2.0-litre gasoline engines and the MZ-CD 1.6-litre turbo diesel. It is a high-performance clean diesel engine with top class output, fuel economy and quietness. The MZR-CD 2.2-litre turbo diesel engine will be offered in two variants: a high power version with a maximum torque of 400 Nm/1,800-3,000 rpm and a maximum output of 136 kW (185 PS)/3500 rpm, and a standard power version with a maximum torque of 360 Nm/1,800-2,600 rpm and a maximum output of 110 kW (150 PS)/3500 rpm. Both versions have outstanding clean emissions performance, comply with the Euro Stage 5 regulations and feature a Mazda developed unique Diesel Particulate Filter (DPF) technology for more efficient regeneration. Fuel economy is also greatly improved by 7 to 10 percent compared to the MZR-CD 2.0-litre engine equipped in the existing model, attaining 5.4 l/100 km for the standard power version and 5.6 l/100 km for the high power version.

The MZR 2.0-litre petrol engine underfloor catalyst is the world's first vehicle catalyst to be constructed with single nanotechnology, which controls even finer materials structures than nanotechnology. It is used to embed individual particles of precious metals, which are less than 5 nanometers in diameter, into the catalyst base material. This new development enables Mazda to reduce the amount of expensive precious metals such as platinum and palladium by 70 to 90 percent without impairing catalyst performance. The catalyst is an important part of Mazda's efforts to reduce reliance on limited resources.

Power steering, suspension and brake systems
To deliver just the right balance between fuel economy, light steering-wheel operation and a feeling of stability, all configurations of the all-new Madza3 are equipped with the Electro-Hydraulic Power Assist Steering system (EHPAS) that has earned high acclaim on the first generation Mazda 3. The suspension is based on the first generation Mazda 3 system, and has been enhanced to ensure even nimbler response to steering wheel operation, and also to improve roll control and maintain a flatter ride by strengthening the suspension damping. In the brake system, the vacuum booster has been tuned and the feeling of initial brake application has been optimized. The overall result is outstanding response and reassuring linearity under all braking conditions.

The Highly rigid body
The basic development concept for the body shell of the all-new Mazda 3 was to improve the overall balance of the body's rigidity and ensure it firmly absorbs the reaction force of the dampers. To this end, particular attention went to reinforcing the area around the front and rear suspension mounts and the joint sections in each corner, which are subject to greater stress. Structural adhesive was used to strengthen the joints for the front and rear suspension towers, and spot welding was added to reinforce the joints of the door openings. The result is a substantial improvement in rigidity and body hysteresis (the degree of car body deformation due to repeated applications of torsional load).

Class-leading aerodynamics
The drag coefficient for the European specification 5-door hatchback and 4-door sedan are respectively 0.30 and 0.28, amongst of the bests in the segment. These measures helped the engineers attain top-class levels for wind noise reduction, high speed stability and fuel economy.

Cabin environment - sense of oneness between car and driver
Aboard the all-new Mazda 3 is a new Human Machine Interface that contributes to the sense of oneness between the car and driver. The cabin interior is designed to allow the driver to concentrate on driving and also appreciate the level of quality in both design and the materials used.

A sporty cockpit that improves functional beauty
The new "zone layout" approach focuses on improving visibility and more intuitive controls which provide "a sense of the car and driver as one" and "a reassuring sense of confidence that frees the driver to concentrate on driving." First, the Mazda 3 development team integrated the information display and positioned it towards the front in the optimal "zone." This placed the information necessary while driving where it can be seen with the least amount of eye movement. Next, the engineers placed all the controls and switches within a single "zone" closer to the driver's hands. Designing the cockpit with controls and information display in separate zones frees the driver to concentrate on driving.

The Multi information display (MID)
Based on the concept of the zone layout, Mazda developed the Multi Information Display (MID). It clearly shows information on all the equipment needed while driving, such as the trip computer, audio system and compact GPS system (optional), which can be operated easily by switches mounted on the steering wheel.

Seats that fit better, provide greater support and are more functional
The raised sides on the front of the seat cushions were made 20mm larger than on the first generation Mazda 3 to increase the leg support for a better fit. The seat backs were also extended by 35mm, which better supports the occupant's posture. Seat position adjustment controls were also evolved. The new power seat has a 3-position memory function. Upon approach to the car, the left-front seat automatically adjusts to the settings chosen by up to 3 different drivers by recognizing the code of the key fob. High-grade models feature standard sports seats.

Substantially reduced road and wind noise
Many improvements were made to structural rigidity and powertrain NVH performance to provide a quieter, more pleasant ride, including the reduction of high frequency booming noise sometimes heard when decelerating while further evolving a sporty engine note. Increasing the rigidity of components and joints also helped to deliver a quieter ride that rates among the class leaders. The sound pressure level of road noise was curtailed by 6 to 11 percent over the previous model, and wind noise was reduced by approximately 6 percent, to 59.0 dB at 100 km/h with a 5 m/s crosswind, placing the all-new Mazda 3 among the quietest in the class.

The Safety
Mazda focused on enhancing active safety equipment that supports the recognition and avoidance of hazards. Specifically, the cutting edge active safety technologies featured on the all-new Mazda 3 include ABS, Electronic Brake Force Distribution (EBD), Dynamic Stability Control (DSC) and Emergency Stop Signaling system(ESS) as standard equipments, and bi-xenon headlights with a pivoting adaptive front lighting system (option). New features include the Rear Vehicle Monitoring system (RVM), Tyre Pressure Monitoring System (TPMS) and Heated Wind Shield (option). The new model's passive safety systems are comprehensive and include Mazda proprietary highly-rigid and safe vehicle body technology, the Mazda Advanced Impact-energy Distribution and Absorption System, as well as front seat active headrests and a complement of six airbags, placing the all-new Mazda 3 at the level of the top marks in collision safety testing around the world.