公开(公告)号：EP0349992A3

公开(公告)日：1990-11-07

申请号：EP89112222.8

申请日：1989-07-04

申请人： Mazda Motor Corporation

发明人： Ohmura, Hiroshi

IPC分类号： B62D7/14

CPC分类号： B62D7/148

摘要： A rear wheel turning system for turning the rear wheels (6L, 6R) of a vehicle in response to operation of the steering wheel (26) includes an actuator having an electric motor (4) which is energized by a battery (2). A rear wheel turning mechanism (16) is driven by the electric motor and turns the rear wheels. A control unit (10) outputs a control signal to the electric motor in order to cause the rear wheels (6L, 6R) to turn to a predetermined turning angle according to the operating condition of the vehicle. The control unit ceases controlling the electric motor when a predetermined condition is established after the engine has stalled.

公开(公告)号：EP0337360A3

公开(公告)日：1990-10-31

申请号：EP89106340.6

申请日：1989-04-10

申请人： Mazda Motor Corporation

发明人： Ohmura, Hiroshi

IPC分类号： B62D7/14

CPC分类号： B62D7/148 ,  B62D7/1581

摘要： A rear wheel turning mechanism of a four wheel steering system includes a rear wheel turning rod (4) which is connected to the rear wheels (18L,18R) of the vehicle and is adapted to be displaced so as to turn the rear wheels. An electric motor is operatively connected to the rear wheel turning rod and the steering wheel so as to displace the rear wheel turning rod, which turns the rear wheels in response to the operation of the steering wheel. A rear-wheel-neutralizing spring urges the rear wheel turning rod to the neutral position in which the rear wheels are held in the straight-ahead position. A clutch is interposed between the electric motor and the rear wheel turning rod and is adapted to disconnect the latter from the former to permit the latter to return to the neutral position under the force of the rear-wheel-­neutralizing means.