Patent ID: 6904346

Claim:
A steering system for a motor vehicle, comprising: an operation member for steering the motor vehicle; a steering mechanism for turning steerable vehicle wheels according to operation of the operation member; a principal steering actuator for applying a driving force to the steering mechanism; an auxiliary steering actuator capable of applying a driving force to the steering mechanism; a counter force actuator for applying a counter force to the operation member according to a reaction force from a road surface; a principal steering control section for controlling the principal steering actuator; an auxiliary steering control section for controlling the auxiliary steering actuator; a counter force control section for controlling the counter force actuator; a main controller for comprehensively controlling the principal steering control section, the auxiliary steering control section and the counter force control section; a first vehicle condition sensor for detecting a vehicle condition related to steering control of the motor vehicle, and generating an output signal which is inputted only to the main controller; a second vehicle condition sensor for detecting the same vehicle condition as the first vehicle condition sensor, and generating an output signal which is inputted only to at least one of the principal steering control section, the auxiliary steering control section and the counter force control section; and a control signal line interconnecting the principal steering control section, the auxiliary steering control section and the counter force control section, wherein the at least one of the principal steering control section, the auxiliary steering control section and the counter force control section which receives the output signal of the second vehicle condition sensor, is adapted to process the output signal of the second vehicle condition sensor and input a control signal through the control signal line to the other control sections.