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Emergency steering system and method for automatic drive-by-wire vehicle

An emergency steering and automatic driving technology, which is applied in the field of emergency steering system of automatic driving-by-wire vehicles, can solve problems such as hindering steering action, vehicle lateral control out of control, and potential safety hazards, so as to achieve normal steering functions, avoid safety accidents, and save power Effect

Pending Publication Date: 2021-06-15
西安主函数智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the operation of the self-driving construction vehicle in the self-driving mode, without the participation of the driver, the steering pump may stop working due to its own failure. If the steering pump fails, the steering hydraulic circuit will not only have no power, but also form damping to hinder the steering action.
When the above problems occur, the lateral control of the vehicle will be out of control, posing a fatal safety hazard

Method used

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  • Emergency steering system and method for automatic drive-by-wire vehicle
  • Emergency steering system and method for automatic drive-by-wire vehicle
  • Emergency steering system and method for automatic drive-by-wire vehicle

Examples

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Embodiment approach

[0107] The connection diagram of the emergency steering system is as follows: figure 1 As shown, the control logic diagram of the emergency steering system is as follows: figure 2 As shown, the hydraulic circuit principle of the emergency steering system is as follows: image 3 shown.

[0108] 1. If figure 1 As shown, a flow / oil pressure detection sensor is installed between the oil circuit connected to the steering pump and the steering actuator, and a flow switch is optional. When the flow of hydraulic oil flowing through the flow switch in the oil circuit is less than the set threshold value, the flow switch is closed. Output a level signal to the emergency steering system controller to indicate low flow.

[0109] 2. When the steering system of the vehicle is working normally, the steering pump sucks the hydraulic oil from the steering oil tank and sends it to the steering actuator. The steering force of the steering gear is amplified by the hydraulic oil to drive the s...

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PUM

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Abstract

The invention discloses an emergency steering system for an automatic drive-by-wire vehicle. The system comprises an oil pressure or flow detection sensor used for detecting the oil pressure or flow of hydraulic oil between oil paths connected with a steering pump and a steering actuator, an oil path switch arranged between the oil paths, an emergency steering system controller outputting a signal I when the oil pressure value or the flow value is lower than a preset corresponding threshold value, and an emergency pump, wherein after the emergency pump receives the signal I, the emergency pump is started to input hydraulic oil into the steering actuator. The system has the advantages of automatically starting the emergency pump and guaranteeing the normal steering function of the vehicle. The invention further discloses an emergency steering method for the automatic drive-by-wire vehicle. The emergency steering method comprises the steps of detecting the oil pressure or flow of hydraulic oil between the oil paths connected with the steering pump and the steering actuator; when the oil pressure or flow is lower than the preset threshold value, closing the oil paths, and outputting the signal I; and after the emergency pump receives the signal I, starting the emergency pump to input hydraulic oil into the steering actuator. The method has the advantages of automatically starting the emergency pump and guaranteeing the normal steering function of the vehicle.

Description

technical field [0001] The invention relates to the technical field of automatic driving. More specifically, the present invention relates to an emergency steering system and method for an autonomous drive-by-wire vehicle. Background technique [0002] At present, engineering vehicles compatible with manned driving and automatic driving modes have steering system control and execution components including steering gear and steering pump. Steering gear includes a controller and a steering motor. The steering pump is a key component that amplifies the steering force to the steering actuator through hydraulic pressure. [0003] During the operation of the self-driving construction vehicle in the self-driving mode, without the participation of the driver, the steering pump may stop working due to its own failure. If the steering pump fails, the steering hydraulic circuit will not only have no power, but also form damping to hinder the steering action. When the above problems o...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D5/30
CPCB62D5/30B62D5/0481
Inventor 何银涛王坚刚任宏亮庞亚娜
Owner 西安主函数智能科技有限公司
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