Motor-driven power steering apparatus

Details Motor-driven power steering apparatus Motor-driven power steering apparatus

1990-05-15

1991-08-20

Marmor, Charles A.

Motor vehicles

Compensating devices

180141, 36442405, B62D 504

Patent

active

050406299

ABSTRACT:
A motor-driven power steering apparatus comprising a steering assisting motor, a torque sensor detecting steering torque, a vehicle speed sensor, and a steering angular velocity detecting unit detecting steering angular velocity of steering mechanism. The power steering apparatus sets the value of current to be delivered to the steering assisting motor in correspondence with the detected steering torque and vehicle speed. The power steering apparatus sets the current value to be 0 when the steering torque remains in the dead zone in which the steering torque value is less than the first predetermined value. If the steering torque is more than the first predetermined value and less than the second predetermined value, the current value is set to increase as the steering torque value increases. If the steering torque is in excess of the second predetermined value, the growth rate of the current value against the steering torque is set to diminish as the vehicle speed rises. Further, the apparatus sets the subtraction current of which value increases as the detected steering angular velocity and the vehicle speed increases, and then subtracts the subtraction current from the set current value, transmitting the substracted result to the motor. Since the value of the subtraction current grows when the vehicle runs fast and a small value of current is set, only a small amount of current flows through the motor.

REFERENCES:
patent: 4657103 (1987-04-01), Shimizu
patent: 4715463 (1987-12-01), Shimizu
patent: 4730686 (1988-03-01), Shimizu
patent: 4753308 (1988-06-01), Noto et al.
patent: 4819170 (1989-04-01), Shimizu
patent: 4961474 (1990-10-01), Daido et al.

Affiliated with

Also associated with

Rating

Motor-driven power steering apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motor-driven power steering apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor-driven power steering apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1002167