October 4, 2007 Mazda is set to continue its stunning array of concept cars over recent years with the first images appearing of the Mazda Taiki concept car which will be shown at the 40th Tokyo Motor Show later this month. The company will also unveil the new Mazda Premacy Hydrogen RE Hybrid, a series of future-oriented powertrains, and a variety of environmental and safety technologies at the show.
Mazda Taiki continues the evolution of the Nagare design theme, following in the footsteps of the Mazda Nagare, Mazda Ryuga, and Mazda Hakaze concept vehicles. As the fourth in the series, Mazda Taiki further advances and refines the theme through a fusion of the Nagare (flow) design concept and real-world technologies, such as a next-generation rotary engine and enhanced aerodynamic performance. Mazda Taiki sets a new ideal for the front-engine rear-drive sports car of the future.
Mazda Taiki reflects one possible direction for a future generation of Mazda sports cars aimed at helping create a sustainable society. The fourth concept car in the Nagare design series, Mazda Taiki further evolves the “flow” theme to establish a breathtaking presence that clearly distinguishes it as the next in the series, and which visually expresses the atmosphere – called taiki in Japanese – that wraps the Earth in its protective mantle. The basic proportions begin with the stretched coupe form of a front-engine rear-wheel-drive layout, the short overhangs, and the liberating feel of an all-glass canopy.
The challenge to create “a design that visually expresses the flow of air” was inspired by the image of a pair of Hagoromo – the flowing robes that enable a celestial maiden to fly in Japanese legend – floating down from the sky. Inspired by Japanese koinobori – the decorative “climbing carp streamers”– the notion of creating an Air-tube became the concept word for the interior design. In accordance, from the dashboard and seats down to the door trim, the interior space creates the dynamic sensation that the flow of the wind is being visually depicted. Centering around the performance rotary engine sports packaging that is synonymous with the Mazda name, technologies introduced for the Mazda Taiki include the next-generation RENESIS (rotary engine 16X), which sets new standards for environmental and driving performance, a front-engine rear-drive layout, a unique 2-seat configuration, and Mazda’s rotary sports package, which conveys an image of lightness. The effect integrates the design theme perfectly to realize outstanding aerodynamic performance.
New Mazda Premacy Hydrogen RE Hybrid
Compared with the Mazda RX-8 Hydrogen RE, the new Premacy Hydrogen RE Hybrid yields 40% better output, resulting in enhanced acceleration performance and an extended hydrogen-fueled range of about 200km, or twice that of the RX-8 Hydrogen RE. Seating capacity is also increased to give accommodation for five adults along with greater luggage space. The hydrogen rotary engine is changed from a longitudinal to a transverse layout and its intake/exhaust resistance and combustion efficiency are improved to yield high output across a wide range of engine speeds. The hybrid system employed for the hydrogen rotary engine efficiently converts energy from hydrogen combustion into electricity that powers the electric motor. Thanks to progress in electric drive technology, the system realizes high energy-efficiency and a quick response allied with low fuel consumption. Acceleration kicks in the instant you hit the accelerator, creating a direct feeling of power. Plant-derived Mazda Biotechmaterial is used for interior plastic parts and seat fabrics to accelerate research and development for commercial use.
Next Generation I-4 Direct Injection Gasoline Engine
With the next-generation 2.0L gasoline engine, we are aiming for a 15% to 20% increase in dynamic performance and a 20% increase in fuel economy (in-company comparison with the current 2.0L engine). Particular attention was paid to direct injection, combustion control, variable valve system technology and emission purification technology to reduce all energy losses and raise thermal efficiency. Further, Mazda is developing a new catalyst employing single nano technology that simultaneously improves emissions-cleaning capability and reduces the volume of precious metal required in a 3-way catalytic converter.
Next Generation Clean Diesel Engine
In developing our next-generation 2.0L diesel engine, we aimed at emissions performance to meet global standards and fuel economy raised by as much as 10%. We are also pursuing the kind of performance that allows stress-free driving up to high engine speeds. To fulfil our aims, we are promoting direct piezo-injection technology enabling multi-stage injection, reduction of the weight and size of every reciprocating and rotating component as well as the aluminum cylinder block. A two-stage turbocharger is adopted to yield both high torque in the low rev range and an increased acceleration response. The most advanced catalyst technologies, such as a highly efficient catalyst to burn particulate matter, are also fitted.
Next Generation RENESIS (Rotary Engine 16X)
In developing the next-generation RENESIS, Mazda made a thoroughgoing revision of engine dimensions including the trochoid rotor housing, adopting a longer stroke and larger displacement of 1600cc (800cc x 2) aimed to raise thermal efficiency and boost torque at all engine speeds. By employing the Hydrogen RE design policy of a direct injection system and aluminum side housing, as well as various other measures, we are further promoting the rotary engine’s merits of light weight and compact size.
SISS (Smart Idle Stop System)
Mazda’s SISS restarts the engine without using an electric motor. The system injects fuel directly into the cylinders while the engine is stationary and ignites the fuel to create downward piston force that serves to start the engine, resulting in fuel savings of about 10% in Japan’s 10-15 mode in addition to restarting the engine quickly and quietly.
Rear Vehicle Monitoring System
Radar sensors in the left and right rear corners of the body detect a vehicle approaching from the rear or in the blind area behind the B-pillars. The system is active when traveling at 60 km/h or faster.
Multi-control system CF-Net (Cross Functional-Network)
A centralized display above the instrument panel close to the driver’s line of sight and steering wheel switches within easy reach of the driver allow easy, integrated operation of audio, climate control, touring computer and other systems.
Roll stability control system
The system maintains a stable vehicle attitude by ascertaining the absolute roll angle at any given moment through a combination of information on the vehicle’s roll movements provided by the roll rate sensor, and data on steering angle, lateral G-force, yaw rate and vehicle speed from the DSC (Dynamic Stability Control) system.
Driving assistance technology coordinating with transport infrastructure
Mazda is participating in an ITS public road test to be held in Hiroshima under the auspices of an organization made up of government, business and academic institutions. The test is scheduled to begin in the fall this year. We are in charge of developing a navigation system that supports ITS in this test on public roads and we will collect and analyze data from systems installed in several dozen Mazda vehicles. We are also developing an infrastructure-cooperative driver support system that will allow the driver to receive relevant information from sensors, beacons and other devices installed on the road. The support system includes a right-turn collision prevention support system, a blind corner collision prevention support system, and a system to support the prevention of rear-end collisions when waiting at traffic signals. Mazda is actively promoting this kind of road-human-vehicle interface and control technology approach.