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Steering system for vehicle

A steering system and steering angle technology, which is applied in the field of steering-by-wire systems of vehicles to achieve the effect of reducing interlocking rotation and reducing self-steering

Active Publication Date: 2016-02-24
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if there is no abnormality in the SBW system and the clutch is still connected, the steering wheel may rotate due to the continuation of the SBW control (in other words, the operation of the turning actuator)

Method used

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  • Steering system for vehicle
  • Steering system for vehicle
  • Steering system for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 A schematic configuration of a vehicle steering system 1 according to an embodiment of the present invention is shown. The vehicle steering system 1 includes a steering unit 20 and a turning unit 50 . The steering unit 20 is operated by the driver. The turning unit 50 turns the right front wheel FW2 and the left front wheel FW1 in response to the driver's steering. The right front wheel FW2 and the left front wheel FW1 are steering wheels. The SBW system is used as the vehicle steering system 1 . When the system is normal, the clutch 30 mechanically separates the steering unit 20 and the rotating unit 50 from each other. exist figure 1 In the illustrated example, a state in which the clutch 30 is connected and the steering unit 20 and the rotating unit 50 are mechanically coupled to each other is shown.

[0019] The steering unit 20 includes a steering wheel 10 , a steering shaft 12 , a steering angle sensor 14 , a steering torque sensor 16 and a steering...

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PUM

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Abstract

A steering system includes a steering unit including a first actuator; a turning unit including a second actuator; and a backup mechanism configured to mechanically couple the steering unit and the turning unit, wherein a maximum torque that the first actuator is able to transmit to the second actuator via the backup mechanism is larger than or equal to a maximum torque that the second actuator is able to transmit to the first actuator via the backup mechanism.

Description

technical field [0001] The invention relates to a steering system for a vehicle. More specifically, the present invention relates to steer-by-wire systems for vehicles. Background technique [0002] In recent years, a steer-by-wire system (hereinafter referred to as an SBW system) in which a steering unit including a steering wheel and a turning unit including a turning mechanism are mechanically separated from each other has been developed. The SBW system may include a backup mechanism with a clutch mechanically coupling the steering unit to the rotating unit for fail-safe purposes. In the SBW system thus configured, the turning mechanism is controlled by an electric signal in response to the operation of the steering wheel when the system is normal (hereinafter referred to as SBW control). On the other hand, when an abnormality occurs in the SBW system, the clutch is quickly engaged, the SBW control is stopped, and the system is switched to assist control for reducing th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/00
CPCB62D5/003B62D5/0409B62D5/046
Inventor 关谷义秀
Owner TOYOTA JIDOSHA KK