To provide an electric power steering device capable of fully alleviating a shock at the time of end abutting while a good steering feeling is secured even when a steering wheel is turned back at a point near the maximum steering angle.
A target current setting part to set a target value of a current fed to a motor decides fundamental assist amperage Ia for obtaining a proper steering assist force on the basis of a steering torque sensing value and a vehicle speed sensing value and calculates a current target value It by multiplying the fundamental assist amperage Ia by an assist gain Ga. The assist gain GA is set so as to decrease as approaching the maximum steering angle if the steering angle sensing value exceeds a reduction starting angle set near the maximum steering angle and arranged so that the difference between the maximum steering angle and the reduction starting angle becomes large as a steering speed increases in case the steering wheel is turned toward the maximum steering angle, and in the case turned toward the neutral position, the difference becomes small steering speed increase.
| JP5047694 | Electric power steering device |
| JPS6343867 | ELECTRIC POWER STEERING DEVICE |
| JP6772479 | Communication device |
TAKAMATSU TAKANOBU
KOYO SEIKO CO
TOYODA MACHINE WORKS LTD
Next Patent: STEERING GEAR FOR VEHICLE, AND MOTOR TYPE OPERAING DEVICE