Vehicular steering system

Patent metadata

Field	Value
Publication number	US-9663141-B2
Application number	US-201615184435-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jun 26, 2015
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A vehicular steering system includes a driving wheel, a wheel drive actuator that rotationally drives the driving wheel, a steering operation mechanism that steers the driving wheel, a steering operation actuator that applies a steering operation force that is used to steer the driving wheel to the steering operation mechanism, and a hydraulic circuit that transmits the rotational driving force of the wheel drive actuator to the steering operation mechanism via hydraulic oil as a steering operation force.

First claim

What is claimed is:

1. A vehicular steering system comprising:
a driving wheel;
a wheel drive actuator that applies a rotational driving force to the driving wheel;
a steering operation mechanism that steers the driving wheel;
a steering operation actuator that applies a steering operation force that is used to steer the driving wheel to the steering operation mechanism; and
a hydraulic circuit that transmits the rotational driving force of the wheel drive actuator to the steering operation mechanism via hydraulic oil as a steering operation force.

2. The vehicular steering system according to claim 1 , wherein the hydraulic circuit includes:
a hydraulic pump that is driven by a rotational driving force of the wheel drive actuator;
a hydraulic actuator that is driven by the hydraulic oil fed from the hydraulic pump to apply a steering operation force to the steering operation mechanism; and
a directional control unit that switches a flow direction of the hydraulic oil between a driving position where a driving force acting in a predetermined direction is applied to the hydraulic actuator and a neutral position where no driving force is applied to the hydraulic actuator.

3. The vehicular steering system according to claim 1 , further comprising:
a clutch that permits and cuts off transmission of the rotational driving force of the wheel drive actuator to the hydraulic circuit.

4. The vehicular steering system according to claim 2 , further comprising:
a clutch that permits and cuts off transmission of the rotational driving force of the wheel drive actuator to the hydraulic circuit.

Assignees

• Jtekt Corp

Inventors

• Arima Masanori
• Hasuda Yasuhiko
• Nimura Keita

Classifications

• B62D5/00 Primary

  Power-assisted or power-driven steering (for non-deflectable wheels B62D11/00; fluid-pressure servomotors in general F15B) · CPC title

• B62D5/10

  characterised by type of power unit · CPC title

• B62D5/062 Primary

  Details, component parts · CPC title

• B62D5/08

  characterised by type of {steering} valve used (valves in general F16K) · CPC title

• B60K7/0007

  the motor being electric · CPC title