Steering responsive power boost

Details Steering responsive power boost Steering responsive power boost

1999-02-25

2000-10-31

Hurley, Kevin

Motor vehicles

Steering by driving

Auxiliary steering motor

180 67, 701 41, B62D 1104

Patent

active

061387827

ABSTRACT:
A steering control system for a tracked vehicle includes an engine driven variable displacement steering pump which drives a hydraulic motor. A control system senses steering wheel position, vehicle speed, engine speed and forward/reverse vehicle direction. As a function of these sensed inputs, a control signal is generated and is used to control the swashplate angle of an engine-driven variable displacement pump which drives a steering motor which drives a differential track drive mechanism. The control system also determines a ratio of motor speed to vehicle speed and generates a powerboost signal when the ratio exceeds a threshold value. The powerboost signal is communicated to the engine controller which causes the engine to increase its power output. This modifies the engine fuel delivery curve based on the steering system power requirement and increases the power available for turning the vehicle.

REFERENCES:
patent: 4309917 (1982-01-01), Leet
patent: 4519275 (1985-05-01), Maruyama et al.
patent: 4699021 (1987-10-01), Waddington
patent: 5921335 (1999-07-01), Straetker

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