Table 1. Some basic specifications and calculated performance for the LLNL hydrogen hybrid vehicle.
General description
Five-passenger, engine-flywheel hybrid vehicle
Hydrogen internal combustion engine
Cryogenic or pressurized hydrogen-storage system
Principal accessory: air conditioning
Selected vehicle characteristics

Vehicle empty total weight
Power-train weight
Fuel-tank capacity
Liquid-hydrogen tank volume@100 psi
Liquid-hydrogen tank weight@100 psi
Pressurized-hydrogen tank volume@5000 psi
Pressurized-hydrogen tank weight@5000 psi
Aerodynamic-drag coefficeint
Rolling-friction coefficient
Electric motor
Maximum continuous torque
Maximum speed motor
Transmission efficiency
Hydrogen-engine efficiency

Calculated performance
Combined 55% urban, 45% highway
gasoline-equivalent mileage
Driving range
Time to reach 96 km/h (60 mph)
2508 lb. (1140 kg)
578.6 lb (263 kg)
10.45 lb (4.75 kg) of hydrogen
28 gal (106 L)
79 lb (36 kg)
62 gal (235 L)
141 lb (64 kg)
0.24
0.007

100 N ª m
11,000 rpm
95%
46%



~80 mpg (34 km/L)
~380 mi (608 km)
9.7 s


Return to Hybrid Vehicle Article