Boots – shoes – and leggings
Patent
1990-07-13
1992-06-16
Chin, Gary
Boots, shoes, and leggings
180 791, 180142, B62D 504
Patent
active
051229587
ABSTRACT:
An apparatus for controlling the ratio of a assisting force produced by a power steering system installed in an vehicle to a steering torque supplied by the driver wherein the ratio is changed by a solenoid valve arranged in the power steering system. The CPU of the apparatus changes control current to be applied to the solenoid valve using a characteristic map defining change of a base current with respect to changes of the vehicle speed and the steering angle. Further, the CPU increases the control current, when the steering wheel is returned to its neutral angle position, so as to decrease the ratio, increasing the self returning ability of the steering mechanism. The control current applied to the solenoid valve during the returning operation is changed depending upon both the steering angle and the steering speed of the steering wheel using additional characteristic maps.
REFERENCES:
patent: 4730686 (1988-03-01), Shimizu
patent: 4789041 (1988-12-01), Takeshima et al.
patent: 4800975 (1989-01-01), Oshita et al.
patent: 4834203 (1989-05-01), Takahashi et al.
patent: 4837692 (1989-06-01), Shimizu
patent: 4979114 (1990-12-01), Oshita et al.
patent: 4989682 (1991-02-01), Takahashi et al.
Eto Kunihiko
Kodama Kazumasa
Takeuchi Shiro
Chin Gary
Toyoda Koki Kabushiki Kaisha
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