MOTOR DRIVEN TYPE POWER STEERING CONTROL DEVICE

Japanese Patent JPS63162370

A

PURPOSE:To ensure safety in running by providing a torque sensor having two displacement-electric signal conversion parts and deenergizing a motor and an electromagnetic clutch via the judgement of a control unit as abnormal when a deviation computed from the output of both torque sensors has exceeded the predetermined value. CONSTITUTION:When a vehicle is running, steering torque is measured from the output of the first and second displacement-electric signal conversion parts 3c and 3e of a torque sensor 3, using first and second steering torque measurement means 9a and 9b. Also, a vehicle speed 'V' is measured on the basis of a speed sensor 10, using a speed measurement means 9d. And when a difference between each measured steering torque has exceeded the predetermined value, a torque sensor abnormality judgement means 9c judges that the torque sensor 3 is abnormal, and in this case of judging abnormality, a motor current determination means 9f controls a motor current control means 9g and an electromagnetic clutch control means 9h, thereby de-energizing a DC motor 14 for assisting steering and an electromagnetic clutch 15 for transmitting the power of the DC motor 14 to a rack axis 6.

JPH02151573	CAR SPEED SENSOR WIRE BREAK DETECTING DEVICE FOR VEHICLE
JPH0350074	MOTOR-DRIVEN TYPE POWER STEERING

KOZUKA HAJIME
SAITO NAOKI
MORISHITA MITSUHARU
TAKASHITA SHINICHI

JP31321386A

July 05, 1988

December 26, 1986

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NIPPON SEIKO KK
MITSUBISHI MOTORS CORP
MITSUBISHI ELECTRIC CORP

B62D6/02; B62D5/04; B62D5/06; B62D6/00; B62D119/00; (IPC1-7): B62D5/04; B62D6/02

JPS61222869A	1986-10-03
JPS62152880U	1987-09-28
JPS60182279U	1985-12-03
JPS59209964A	1984-11-28
JPS61254829A	1986-11-12
JPS5540954A	1980-03-22

Kaneo Miyata (3 outside)

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