Servo-assisted steering device for vehicles, composed of a manual control member connected to the shaft driving a pressurized control fluid supplying and conveying unit for manually driving it when the control member is rotated, which supplying and conveying unit has at least two fluid conveying lines which are connected to one of the two chambers respectively of one or more steering actuators. There is provided a hydraulic power unit connected to the supplying and conveying unit, which is composed of at least a reservoir for said hydraulic fluid and of powered pumping means which are driven by at least an electric motor and which is connected to the fluid supplying/conveying circuit for supplying the pressurized fluid alternately to either one or the other of the two chambers of the actuator or actuators depending on the rotational direction of the control member, the electric motor being energized and/or de-energized upon the operation of the control member, such that the pumping means increase the amount of pumped fluid in order to reduce the resistance when steering the manual control means. There is also provided a control unit, in communication with the electric motor and the control member, which sets the operation of the electric motor.
SERVO-ASSISTED STEERING DEVICE
SERVOLENKVORRICHTUNG
DISPOSITIF DE DIRECTION ASSISTÉE
2017-05-03
Patent
Electronic Resource
English