Vehicle steering device

摘要

The present invention provides a vehicle steering device, comprising: a manual steering means for manually steering steerable wheels in a vehicle; a steering-torque detection means for detecting a steering torque applied to the manual steering means; a first electromotive-torque determination means for determining a first electromotive-torque value based on the detected steering torque; a vehicle-behavior detection means for detecting behavior of the vehicle; a second electromotive-torque determination means for determining a second electromotive-torque value based on a detected value obtained by the vehicle-behavior detection means; an electric motor for applying a combined electromotive torque to the steerable wheels; and a current control means for controlling current supplied to the electric motor based on a value of the combined electromotive torque obtained by adding the first electromotive-torque value to the second electromotive-torque value.

主权项

1. A vehicle steering device, comprising:
a manual steering means for manually steering steerable wheels in a vehicle; a steering-torque detection means for detecting a steering torque applied to the manual steering means; a first electromotive-torque determination means for determining a first electromotive-torque value based on the detected steering torque; a vehicle-behavior detection means for detecting behavior of the vehicle; a second electromotive-torque determination means for determining a second electromotive-torque value based on a detected value obtained by the vehicle-behavior detection means; an electric motor for applying a combined electromotive torque to the steerable wheels; and a current control means for controlling current supplied to the electric motor based on a value of the combined electromotive torque obtained by adding the first electromotive-torque value to the second electromotive-torque value, wherein the second electromotive-torque determination means resets the second electromotive-torque value to a value equal to or less than an upper-limit value when the second electromotive-torque value is greater than the upper-limit value, and changes the upper-limit value based on a combination of a direction indicated by the second electromotive-torque value and a steering direction of the manual steering means.