Motor vehicles – Compensating devices
Patent
1989-04-28
1990-09-18
Marmor, Charles A.
Motor vehicles
Compensating devices
36442405, B62D 504
Patent
active
049571826
ABSTRACT:
An electric power steering apparatus for an automotive vehicle has an interrupter which cuts off the power to a drive motor when a dangerous situation is detected. In one form of the invention, the interrupter cuts off power to the drive motor when a ground fault sensor detects a ground fault of a motor driver and there is disagreement between a directional drive signal to the drive motor and the direction of torque applied to the steering wheel by the driver. In another form of the invention, the interrupter circuit cuts off power when the vehicle speed exceeds a prescribed level and the torque applied to the steering wheel exceeds a prescribed level for a certain length of time. In a third form of the invention, the interrupter cuts off power when the motor current exceeds a prescribed level and disagreement of directional signals is detected.
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patent: 4688655 (1987-08-01), Sitimizu
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patent: 4886136 (1989-12-01), Kozuka et al.
Morishita Mitsuharu
Uota Kosaku
Yasukawa Takeshi
Boehler Anne Marie
Marmor Charles A.
Mitsubishi Denki & Kabushiki Kaisha
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