Hydro powered RX-8

[The General]

Originally Posted by Media Mazda

October 27, 2004

Mazda Hydrogen Rotary Now Street Legal

- Japanese ministry gives go-ahead for public road testing -

HIROSHIMA, October 27, 2004 – Today, Japan's transport authorities gave Mazda permission to road test a hydrogen-fueled, rotary-engine version of its RX-8 sports car. This unique vehicle features a dual-fuel system that allows the driver to select hydrogen or gasoline with the flick of a switch. In what could prove a historic event, this will be the world's first "street legal" dual-fuel hydrogen rotary.


Mazda RX-8 hydrogen rotary engine vehicle

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 RX-8 at the 2003 Tokyo Motor Show. Mazda's near-term goal is to assess the practicality of this unique powertrain in everyday use. In the next-stage, 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 likewise offers superior environmental performance--zero emission of CO2 and near zero NOx emissions. And because existing parts and production facilities are used, the innovative engine can be built reliably at a relatively low cost.

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-fueled society.

Major specifications of "Mazda RX-8 Hydrogen Rotary Engine Vehicle"

- Base model
Mazda RX-8
- Base engine
13B Dual Fuel Hydrogen Rotary Engine
- Length
4.435m
- Width
1.770m
- Height
1.325m
- Wheelbase
2.7m
- Weight
1,440kg
- Passenger capacity
Four adults
- Fuel
Hydrogen or Gasoline
- Fuel tank
Hydrogen: 74L / 35MPa high-pressure tank
Gasoline: 61L

History of Mazda's hydrogen vehicle development

1991 Developed first hydrogen rotary engine vehicle, HR-X
1992 Test drive of golf cart equipped with fuel cell
1993 Developed second hydrogen rotary engine vehicle, HR-X2
Developed MX-5 test vehicle equipped with hydrogen rotary engine

1995 Conducted Japan's first public road test with Capella Cargo equipped with hydrogen rotary engine

1997 Developed Demio FC-EV
2001 Developed Premacy FC-EV, conducted first public road test in Japan. (Methanol Reforming)
2003 Announced RX-8 hydrogen rotary engine vehicle development
2004 Received MLIT approval for public road testing of the H2RE dual-fuel RX-8

[snoproblem]

This is probably how they'll introduce hydrogen cars into California, when they get that "Hydrogen Highway" plan off the ground. Dual-fuel is a very practical way to go during a period of transition, and the carmakers know that.

Watch for more of these in the near future.

[The General]

If they can manage to get these cars to behave like "normal" cars, this should be the winning solution.

Diesels are becoming more and more powerful... these will probably follow that example in time. Take the BMW 535d: Inline 6 twin turbo 272 hp and 413 lb/ft of torque. It's probably gonna that way anyways...