公开(公告)号：JPH08133055A

公开(公告)日：1996-05-28

申请号：JP27530094

申请日：1994-11-09

Applicant: TOYOTA MOTOR CORP

Inventor： SASAHARA KENJI ,  SAKAMOTO JUNICHI

IPC: B60T8/48 ,  B60T8/172 ,  B60T8/175 ,  B60T8/1755 ,  B60T8/58

Abstract: PURPOSE: To prevent a slip at an early stage by setting the upper limit value of a steering angle capable of stable travelling from the velocity of a vehicle body and the condition of a road and driving the pump of a brake pressure generating source when an actual steering angle exceeds the upper limit value. CONSTITUTION: Pressure rising to a wheel cylinder 28 when acceleration slip control is performed by brake control is directly performed by the pump 14 of a hydraulic source and a pump 20 for anti-skid(ABS). At first, the wheel velocity of left and right front wheels 30 which are a rolling wheel is computed from the detected signals of wheel velocity sensors 32 in a control device 36 to compute the velocity of a vehicle body from the velocity of wheels. Next, a road friction factor is sought by estimation computation. A steering angle (limitation steering angle) at which regular-circle turning can be performed is computed from the road friction factor and the velocity of a vehicle body. When an actual steering angle currently operated exceeds the limitation steering angle, a motor 15 for the pump 14 is driven to provide against the generation of wheel spin.

公开(公告)号：JPH07113810A

公开(公告)日：1995-05-02

申请号：JP26003993

申请日：1993-10-18

Applicant: TOYOTA MOTOR CORP

Inventor： SAKAMOTO JUNICHI

IPC: G01P3/00 ,  B60T8/175 ,  B60T8/58 ,  F02D29/02

Abstract: PURPOSE:To provide a wheel slippage control device capable of improving the drivability of a vehicle by enhancing the stability of a outer wheels white turning around. CONSTITUTION:A wheel speed-detection means M1 detects each speed of right and left driving wheels and following wheels. A correction means M2 applies increasing correction to the wheel speed of an outer side one of the driving wheels in turnaround motion in accordance with a driving condition of a vehicle. A slippage control means M3 controls to surpass accelerating slippage of the driving wheels on the basis of the corrected wheel speed of the turning around outer and the following wheels and the respective wheel speeds of the driven wheels and inside one of the turning around driving wheels.