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Steering systems for vehicles

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

Active Publication Date: 2017-06-27
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 systems for vehicles
  • Steering systems for vehicles
  • Steering systems for vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 The schematic configuration of the vehicle steering system 1 according to the 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 controlled by the driver. The rotation unit 50 rotates 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. in figure 1 In the illustrated example, a state where the clutch 30 is connected and the steering unit 20 and the rotation 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 react...

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PUM

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Abstract

The steering system includes: a steering unit of a first actuator; a rotary unit of a second actuator; and a backup mechanism configured to mechanically couple the steering unit and the rotary unit, wherein the first actuator can The maximum torque that the mechanism transmits to the second actuator is greater than or equal to the maximum torque that the second actuator can 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 a steer-by-wire system for vehicles. Background technique [0002] In recent years, a steer-by-wire system (hereinafter referred to as an SBW system) has been developed in which a steering unit including a steering wheel and a rotating unit including a rotating mechanism are mechanically separated from each other. The SBW system may include a backup mechanism with a clutch that mechanically couples the steering unit to the rotating unit for fail-safe purposes. In the SBW system configured in this way, the rotation 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 connected, the SBW control is stopped, and the system is switched to assist control for...

Claims

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Application Information

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