Mazda is set to make automotive history with the world's first "street legal" dual-fuel hydrogen rotary H2RE - Mazda RX-8 Hydrogen RE - which is due on road test in Japan with government offices and major companies over the next two years.
Japan's transport authorities recently gave Mazda permission to road test the hydrogen-fuelled, rotary-engine version of its head-turning Mazda RX-8 sports coupé. This unique vehicle features a dual-fuel system that allows the driver to select hydrogen or gasoline with the flick of a switch.
Permission from Japan's Ministry of Land Infrastructure and Transport (MLIT) comes 12 months after Mazda unveiled a hydrogen/rotary concept version of the award-winning Mazda RX-8 at the 2003 Tokyo Motor Show. Mazda's short-term goal is to assess the practicality of this unique powertrain in everyday use. Longer term, expected within two years, test vehicles will be leased to governments and fleet users.
Known as H2RE, the test vehicle will deliver good performance with no loss of interior space for four people – the high-pressure hydrogen fuel tank is mounted in the vehicle's trunk. The H2RE is powered by a modified version of Mazda's award-winning RENESIS rotary engine that features an electronically controlled hydrogen gas direct injection system on the rotor housing.
RENESIS has proved ideal for burning hydrogen as the intake area of a rotary engine stays relatively cool in temperature, reducing the tendency for engine backfire - a significant challenge in conventional engines.
The hydrogen/rotary combination also offers superior environmental performance - zero carbon dioxide emissions and near zero NOx emissions. In addition, the innovative engine can be built reliably at a relatively low cost because existing parts and production facilities are used.
More importantly, the hydrogen/gasoline dual fuel system will enable the H2RE to travel beyond the range of the few hydrogen filling stations now available. Mazda will continue to develop this technology for practical use and work to support the development of a hydrogen-fuelled society.Published 30 November 2004