Method for controlling a rear wheel steering device of a front a

Details Method for controlling a rear wheel steering device of a front a Method for controlling a rear wheel steering device of a front a

1996-06-18

2000-06-06

Chin, Gary

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

180410, 180415, 180445, B62D 500

Patent

active

060730676

ABSTRACT:
In a method for controlling a rear wheel steering device of a front and rear wheel steering vehicle, the target computed rear wheel steering angle is defined as a value smaller than the normal computed target rear wheel steering angle when the load of the steering actuator is greater than a prescribed threshold value, and which is otherwise equal to the normal computed target rear wheel steering angle, and the steering actuator is actuated according to a deviation of the actual rear wheel steering angle from the modified computed target rear wheel steering angle, typically with a duty ratio control. Thus, the rear wheel steering device can be operated in a satisfactory manner even when the output capacity of the actuator for the rear wheel steering device is limited, and the steering load is high. A high load condition typically occurs when the vehicle is stationary and when the steering wheel is turned sharply while the vehicle is traveling over a road surface having a high frictional coefficient.

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patent: 5430650 (1995-07-01), Susuki et al.
patent: 5521820 (1996-05-01), Wakamatsu et al.

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