Hybrid propulsion system for a motor vehicle and a method of ope

Details Hybrid propulsion system for a motor vehicle and a method of ope Hybrid propulsion system for a motor vehicle and a method of ope

1995-10-04

1997-12-16

Dougherty, Thomas M.

Prime-mover dynamo plants

Electric control

Starting and generating dynamo

290 45, 180 654, B60L 1102, F02N 1100

Patent

active

056989059

ABSTRACT:
A hybrid propulsion system for a motor vehicle, in which electric motors corresponding to the wheels of the motor vehicle are supplied by a generator, which generator is driven by an internal combustion engine, in particular via a direct current intermediate circuit. To be able to start the internal combustion engine, in the event of the failure of the battery provided for starting the internal combustion engine, by pushing or towing the vehicle or rolling it downhill, the electric motors can be switched over to operate as generators, and the generator can be switched over to operate as a motor, during an emergency starting phase, once the speed of travel of the vehicle exceeds a specified speed threshold. The emergency starting attempt can be initiated by the driver by means of a control mechanism, e.g. a manually actuated control switch or the accelerator pedal. If necessary, the speed threshold can be measured by means of a speed sensor. A voltage monitoring device can essentially guarantee that before the emergency starting attempt takes place, there is sufficient operating voltage available for the control systems which correspond to the electric motors and the generator.

REFERENCES:
patent: 4335429 (1982-06-01), Kawakatsu
patent: 4923025 (1990-05-01), Ellers
patent: 5558175 (1996-09-01), Sherman
VDI-Berichte Nr. 878, "Das elektrische Getriebe von Magnet-Motor fur PKW und Omnibusse", 1991, pp. 611-622.

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