Motor vehicles – Compensating devices
Patent
1987-03-05
1988-07-19
Pekar, John A.
Motor vehicles
Compensating devices
364424, B62D 504
Patent
active
047578696
ABSTRACT:
A motor-driven power steering system for a vehicle preventing transmission of operating noises of the motor to the interior of the passenger compartment of the vehicle and for suppressing the generation of radio wave noises: a speed sensor for detecting the travelling speed of the vehicle; a torque sensor mounted on a steering shaft for detecting turning force imparted to the steering wheel by an operator, a first pinion operatively connected with the steering shaft and adapted to be driven by the steering wheel through the intermediary of the steering shaft, a rack operatively connected through tie rods with a pair of steerable road wheels and having a first rack tooth portion and a second rack tooth portion formed thereon, a second pinion being in meshing engagement with the second rack tooth portion on the rack, a motor operatively connected with the second pinion for power assisting the steering motion of the rack induced by the operator a first electromagnetic clutch interposed between the motor and the second pinion for transmitting power therebetween substantially in proportion to the intensity of current supplied thereto, a second clutch interposed between the motor and the second pinion for selectively establishing or disconnecting the operative connection between the motor and the second pinion, and a control unit adapted to receive output signals from the speed sensor and the torque sensor for controlling the operations of the motor, the first clutch and the second clutch.
REFERENCES:
patent: 4538698 (1985-09-01), Hashimoto et al.
patent: 4577715 (1985-03-01), Saito
patent: 4651840 (1987-03-01), Shimizu et al.
patent: 4660669 (1987-04-01), Shimizu
Hara Tadayuki
Kohge Shinichi
Morishita Mitsuharu
Terauchi Koji
Mitsubishi Denki & Kabushiki Kaisha
Pekar John A.
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