Toyota has doubled the range of its fuel cell hybrid vehicle (FCHV-adv) mostly by doubling the maximum storage pressure. The maximum storage pressure went from 35 to 70 Mpa, which allows the new fuel cell hybrid to more than double it's range from 205 miles (330 km) to 516 miles (830 km).
They also improved fuel efficiency by 25% through improvements in the fuel cell unit performance, by enhancing the regenerative brake system and by reducing energy consumed by the auxiliary system.
They also improved low temperature starts. Internally produced water was interfering with the Membrane Electrode Assembly (MEA). Toyota engineers have been working to alleviate this issue. Refinements have allowed starts at as low as -30 degrees Celsius.
The FCHV-adv will be available for leasing later this year in Japan. Toyota does not know when it will become available elsewhere.
The fuel cell hybrid mates an electric motor to a fuel cell stack, which means the only emissions are water vapor.
Comparison between the old FCHV and the advanced FCHV from Toyota
Vehicle Specifications
*As based on TMC calculations Vehicle TOYOTA FCHV-adv TOYOTA FCHV Overall length/width/height (mm) 4,735/1,815/1,685 4,735/1,815/1,685 Weight (kg) 1,880 1,880 Seating capacity 5 5 Maximum cruising range (km)*
10-15 test cycle/JC08 test cycle Approx. 830/Approx. 760 Approx. 330/ - Maximum speed (km/h) 155 155 Fuel cell Name Toyota FC Stack Toyota FC Stack Type Polymer electrolyte Polymer electrolyte Output (kW) 90 90 Motor Type Permanent magnet Permanent magnet Maximum output
in kW (ps)90 (122) 90 (122) Maximum torque
in N-m (kg-m)260 (26.5) 260 (26.5) Fuel Hydrogen Hydrogen Storage system High-pressure storage tanks High-pressure storage tanks Maximum storage pressure (MPa) 70 35 Tank capacity (L) 156 148 Battery Nickel-metal hydride Nickel-metal hydride
Monday, June 09, 2008
Toyota Fuel Cell Hybrid Vehicle Advanced Model
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