| 摘要 |
PURPOSE:To avoid the deterioration of the steering feeling by preventing the variation of the steering power in the brake power control through the genera tion of the lateral brake power difference. CONSTITUTION:When auxiliary steering power control is carried out for suppressing the variation of the steering power generated by brake power difference for a steering wheel, the auxiliry steering torque variation quantity TH for suppressing the variation of the steering torque which is generated by the differential pressure on the basis of the aimed differential pressure in the brake power difference control or the auxiliary steering torque To as a standard in the ordinary power steering is obtained by a controller (S1161-1163). Further, the controller judges from the differential pressure, if the steering power reduces or increases (S1164-1165), and in case of the reduction direction, the auxiliary steering torque TS is reduced through the subtraction from the standard value TO, and the auxiliary steering power quantity (assistance quantity) is reduced (S1166, 1168). While, in case of the increase direction, addition calculation is performed So that the assisting steering power quantity is increased (S1167, 1168). Accordingly, the variation of the steering power can be reduced. |
