Electric vehicle drive train with direct coupling transmission

Details Electric vehicle drive train with direct coupling transmission Electric vehicle drive train with direct coupling transmission

1993-04-15

1995-04-04

Wright, Dirk

Interrelated power delivery controls, including engine control

Electric engine

With transmission control

180 653, F16H 6104

Patent

active

054032440

ABSTRACT:
An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox.

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MacCready, "Perspective on Vehicle Energy Efficiency and Electric Vehicles", ESD Technology, pp. 7-11, Nov. 1992.
Martin, "Propulsion Technology--Motor Selection Criteria", ESD Technology, pp. 15-17, Nov. 1992.

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