Electric hybrid vehicle and method of controlling it
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United States of America Patent
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Jan 14, 1992
Grant Date -
N/A
app pub date -
Jun 6, 1990
filing date -
Jun 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of operating a vehicle having an electric hybrid power system comprising a battery powered electric motor connected to drive the wheels of the vehicle and a combustion engine which may be releasably coupled mechanically to the electric motor. When so coupled the combustion engine may drive the vehicle and the electric motor may act as a generator to maintain a desired charge level in the batteries. In operation the power train is automatically controlled by a process controller to produce maximum fuel economy for the engine and to maintain the batteries at an acceptable charge level. Means are provided to apply the combined power of the electric motor and the combustion engine to the drive wheels for short duration peaking power. Means are also provided whereby the combustion engine may drive the electric motor to function as a generator and charge the batteries when the vehicle is stationary.
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