公开(公告)号：JPH0550830A

公开(公告)日：1993-03-02

申请号：JP2604392

申请日：1992-01-16

Applicant: TOYOTA MOTOR CORP

Inventor： TSUTSUMI YASUHIRO ,  ISE SEIKI ,  KOMAZAWA MASAAKI

IPC: B60G17/015 ,  B62D6/00 ,  B62D101/00 ,  B62D103/00 ,  B62D105/00 ,  B62D113/00 ,  B62D117/00 ,  B62D131/00 ,  B62D137/00

Abstract: PURPOSE:To increase grounding force of a rear wheel so as to contrive stabilization of a vehicle attitude by additionally providing a device for increasing resistance force against displacement of a suspension device when a differentiated value of a yaw rate signal, steering the rear wheel with a steering angle signal, is in a predetermined value or more. CONSTITUTION:A rear wheel is steered by a rear wheel steering device A to a steering angle determined by inputting a steering angle signal and a yaw rate signal, and on the other hand, the yaw rate signal is differentiated and compared with a predetermined value in a differentiated value comparator B. As a result, when a differentiated value is in the predetermined or more, resistance force against displacement of a suspension device D is increased by a resistance force increasing device C to drive a resistance force variable suspension device D. Further in the resistance force variable suspension device D, when yaw acceleration is a predetermined value or more, main and subair chambers are placed in a disconnected condition and also closing an orifice of a shock absorber to increase the resistance force against the displacement. Accordingly, an effect of controlling turning of a vehicle by steering the rear wheel is increased to promptly correct a vehicle attitude, and a stabilization effect can be well displayed.

公开(公告)号：JPH04332811A

公开(公告)日：1992-11-19

申请号：JP10251191

申请日：1991-05-08

Applicant: TOYOTA MOTOR CORP

Inventor： MATSUO YOSHIAKI ,  ISE SEIKI ,  KOMAZAWA MASAAKI

IPC: B62D6/00 ,  B62D105/00 ,  B62D113/00 ,  G01B21/22

Abstract: PURPOSE:To apply a system which obtains a steering angle from speed of right and left wheels of an automobile, corrects a signal of a steering angle sensor based on the angle and obtains real steering angle to a four-wheel-drive automobile which has no coupled driving wheels. CONSTITUTION:A means J which determines whether or not conditions may cause drive wheels D,G detecting speed from a running state of an automobile to slip is added, and an amount of correction of a steering angle sensor A is updated only when no slip is caused.

公开(公告)号：JPH04292254A

公开(公告)日：1992-10-16

申请号：JP8153691

申请日：1991-03-19

Applicant: AISIN SEIKI ,  TOYOTA MOTOR CORP

Inventor： KUWANA KAZUTAKA ,  YOSHIDA TSUYOSHI ,  KOMAZAWA MASAAKI ,  SUGITANI TATSUO

IPC: B60T8/58 ,  B60T8/172 ,  B60T8/1764

Abstract: PURPOSE:To give proper braking force to rear wheels at both sides as well as to prevent any steering amount from increasing in the case where something goes wrong with a speed state detecting means of one side rear wheel when a vehicle is running on a split road surface. CONSTITUTION:An operating state judging means 106 judges each operating state of rotational state detecting means 111-114. In addition, a split travel judging means 107 judges whether a vehicle is running on a split road surface or not on the basis of each rotation state of wheels FR, FL. When it is so judged to be running on the split road surface, and also judged to be something wrong with a low friction factor road surface side (for example, a wheel RR) out of the rotational state detecting means 113, 114 of rear wheels RR, RL, it is controlled as follows. That is, braking force of the wheel RR is controlled according to output of the rotational state detecting means 111 installed in the front wheel FR at a side corresponding to a side of the rear wheel RR that is judged something wrong.