| | Hybrid car - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-21) |
 | | The internal-combustion engine in a hybrid-electric can be much smaller and lighter, getting far better gas mileage than in a conventional vehicle, because the engine runs at a relatively constant speed, and does not need to provide direct power for acceleration, which is the biggest reason for large engines. |
 | | However, hybrid technology has been in use on railroads ever since the 1930s, when the locomotives on early streamliners ran on gasoline-electric and diesel-electric systems at far greater efficiencies than the steam engines of the day. |
 | | In the second generation, the internal combustion engine drives the wheels directly with the electric motor serves as a power assist when extra power is needed and to recapture the kinetic energy into electric energy during braking. |
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