Steering system with automatic centering and emergency starting functions

An emergency start and automatic centering technology, applied in the field of steering system, can solve the problems of increasing the complexity of system pipeline layout and guiding connection mechanism, so as to improve the guarantee function, reduce the loss along the way, and improve the work efficiency

Pending Publication Date: 2022-01-11
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increase in the requirements for vehicle capacity and vehicle stability, safety, and comfort, how to ensure the reliability of vehicle steering, and how to ensure that the vehicle can still maintain stable steering until the power source of the system fails? Parking, how to achieve high efficiency and energy saving of the system, and reduce efficiency loss have become technical difficulties faced by domestic vehicle manufacturers and have not been able to be effectively solved. Therefore, it is particularly important to develop a proportional steering control system with automatic centering and emergency start functions. necessary
The hydraulic steering system in the prior art usually needs to control the steering cylinder and the centering cylinder separately to realize the wheel steering function and the centering function respectively, which increases the complexity of the system pipeline layout and the guiding connection mechanism, and realizes the high integration of the steering system , simplification of system layout is of great significance especially for the upgrade of all-wheel steering for multi-axle vehicles

Method used

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  • Steering system with automatic centering and emergency starting functions
  • Steering system with automatic centering and emergency starting functions
  • Steering system with automatic centering and emergency starting functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: Steering system with single cylinder with automatic centering and emergency start function

[0042] image 3 It is the composition and schematic diagram of the steering system with single oil cylinder with automatic centering and emergency start function. The A oil outlet of the power source 1 is connected to the P oil inlet of the cylinder-proportional steering control valve group 5, and the system pressure sensor 11 is connected in parallel. At the oil outlet A of the power source 1, the centering pressure sensor 3 and the centering accumulator 4 are connected in parallel, respectively connected to the pressure measuring port CY1 port of the centering accumulator control valve group 2 and the accumulator connection port On the AC port, the oil inlet P of the centering accumulator control valve group 2 is connected with the oil outlet A of the power source 1, and the centering port DZ port is connected with the centering oil port DZ1 of the nested steerin...

Embodiment 2

[0065] Embodiment 2: Steering system with dual oil cylinders with automatic centering and emergency start functions

[0066] figure 1 It is the composition and schematic diagram of the proportional steering control system with dual cylinders with automatic centering and emergency start functions. The difference from Embodiment 1 is that the nested steering cylinder 2 9 and the corresponding cylinder 2 proportional steering control valve group are added. , the connection relationship and working principle remain unchanged, specifically: the oil cylinder one proportional steering control valve group 5, the P oil inlet port of the oil cylinder two proportional steering control valve group 10 are respectively connected with the A oil outlet of the power source 1, the oil cylinder one proportional steering The contraction port SS1 of the control cylinder of the control valve group 5 is connected with the contraction control chamber of the nested steering cylinder 16, the extension ...

Embodiment 3

[0069] Embodiment 3: Steering system with dual oil cylinders only with automatic centering function

[0070] figure 2 It is the composition and schematic diagram of the steering system with only automatic centering function for dual oil cylinders. its working process and figure 1 The steering system with automatic centering and emergency start functions of the double oil cylinder shown is the same, the difference is that there is no shut-off valve 12 , emergency pressure sensor 13 , emergency accumulator valve group 14 and emergency accumulator 15 .

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Abstract

The invention relates to a steering system with automatic centering and emergency starting functions and is used for realizing the stable, reliable and efficient automatic centering and emergency starting functions of a steering control system and reducing the complexity of the system. The power source is used for providing pressure and flow needed by the system, and the first nested steering oil cylinder is an executing mechanism and used for achieving steering and centering of a vehicle. The first nested steering oil cylinder is controlled by the first oil cylinder proportional steering control valve set and comprises a centering oil cavity, an extending oil cavity and a contracting oil cavity. The centering energy accumulator provides centering power for the first nested steering oil cylinder through the centering energy accumulator control valve set. The emergency energy accumulator is used for providing energy when the power source cannot provide working pressure required by vehicle steering, and the power source is used for pressurizing through the emergency energy storage valve group; the emergency pressure sensor is used for measuring the emergency pressure of the emergency energy accumulator, and when the emergency pressure is lower than the normal working pressure of the system, the power source stores energy to the emergency energy accumulator.

Description

technical field [0001] The invention relates to a steering system with automatic centering and emergency start functions, which belongs to the application field of hydraulic machinery and motor vehicles. Background technique [0002] With the increase in the requirements for vehicle capacity and vehicle stability, safety, and comfort, how to ensure the reliability of vehicle steering, and how to ensure that the vehicle can still maintain stable steering until the power source of the system fails? Parking, how to achieve high efficiency and energy saving of the system, and reduce efficiency loss have become technical difficulties faced by domestic vehicle manufacturers and have not been able to be effectively solved. Therefore, it is particularly important to develop a proportional steering control system with automatic centering and emergency start functions. necessary. The hydraulic steering system in the prior art usually needs to control the steering cylinder and the cen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D7/15B62D5/30
CPCB62D7/1572B62D5/30
Inventor 陈轶杰黄龙张亚峰万义强杜甫徐梦岩赵宁徐龙
Owner CHINA NORTH VEHICLE RES INST
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