Boots – shoes – and leggings
Patent
1987-04-21
1989-06-06
Lall, Parshotam S.
Boots, shoes, and leggings
364483, 180142, 180 791, B62D 504, B60G 1708
Patent
active
048376906
ABSTRACT:
A motor-driven power steering system for a vehicle capable of preventing abrupt change in the steering motion or torque an operator even when the battery has been suddenly depleted or excessively discharged during travel of the vehicle, thereby avoiding any possible panic resulting from sudden loss of power assist. The motor-driven power steering system comprises a motor connected to be energized by the battery for power assisting steering motion of the operator, an electromagnetic sliding clutch connected to continuously change the power-assisting force transmitted from the motor to steerable road wheels in accordance with the intensity of current supplied thereto from the battery, a torque sensor for detecting operator-induced steering torque, a battery sensor for detecting a condition of charge of the battery, and a control unit connected to control both the voltage imposed on the motor and the current supplied to the electromagnetic sliding clutch such that they are made zero if the battery has been depleted, while on the other hand, at least one of the motor voltage and the clutch current is gradually reduced if the battery is insufficiently charged. An electromagnetic switching clutch may be provided to be switched on when the traveling speed of the vehicle is less than a predetermined level, but switched off when the travelling speed of the vehicle is above the predetermined level or if the battery has been depleted. An alarm device may also be provided for warning the operator of the depletion or insufficient charge of the battery.
REFERENCES:
patent: 4624335 (1986-11-01), Shiraishi et al.
patent: 4653601 (1987-03-01), Nakamura
Kohge Shinichi
Morishita Mitsuharu
Lall Parshotam S.
Mitsubishi Denki & Kabushiki Kaisha
Ramirez Ellis B.
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