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Vehicle Assisted Steering Systems and Autonomous Vehicles

A steering system and vehicle auxiliary technology, applied in the field of vehicles, can solve the problems of energy-saving accumulators, difficult maintenance, low efficiency, etc., and achieve the effects of saving steering pumps and flow valves, simplifying the layout of oil pumps, and simple system structure

Active Publication Date: 2021-04-23
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above types of auxiliary steering have the following disadvantages: 1. The pressure holding time of the accumulator is short, and it is easy to fill frequently. Nitrogen filling pressure is related to ambient temperature and service time, making maintenance difficult
2. The off-road vehicle tires are wider, and different angles and ground friction are different, resulting in slow response of the load-sensitive pump and delay in rear-wheel assisted steering
3. Manually realize rear wheel assisted steering, which is inefficient

Method used

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  • Vehicle Assisted Steering Systems and Autonomous Vehicles
  • Vehicle Assisted Steering Systems and Autonomous Vehicles
  • Vehicle Assisted Steering Systems and Autonomous Vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a vehicle auxiliary steering system, please refer to figure 1 , figure 2 as well as image 3 , this vehicle auxiliary steering system includes:

[0038] Braking system, with an oil outlet on the braking system;

[0039] The priority valve 7 has a first working position 71 and a second working position 72 on the priority valve 7, and the first working position 71 communicates with the outside world;

[0040] The hydraulic control check valve 5, the hydraulic control check valve 5 has a first communication position 52 and a first disconnection position 51, and the first communication position 52 communicates with the second working position 72;

[0041] The accumulator 4, the accumulator 4 communicates with the first communication position 52;

[0042] The electric proportional flow valve 3, the electric proportional flow valve 3 communicates with the second working position 72;

[0043] Steering cylinder, the steering cylinder communicates wi...

Embodiment 2

[0063] This embodiment provides an automatic driving vehicle, including the vehicle auxiliary steering system provided in Embodiment 1.

[0064] Since the self-driving vehicle provided in this embodiment has the vehicle auxiliary steering system provided in Embodiment 1, it can rationally use the excess flow of the braking system, reduce system heat generation, and save steering pumps and flow valves, and the entire system is simple in structure , can simplify the oil pump arrangement.

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Abstract

The invention provides a vehicle auxiliary steering system and an automatic driving vehicle, which belong to the field of vehicles. The auxiliary steering system of the vehicle includes: a brake system, with an oil outlet on the brake system; a priority valve, with a first working position and a second working position on the priority valve, and the first working position communicates with the outside world; a hydraulic control check valve, The first communication position communicates with the second working position; the accumulator; the electric proportional flow valve, the electric proportional flow valve communicates with the second working position; the steering oil cylinder, the steering oil cylinder communicates with the electric proportional flow valve; the pilot valve, the pilot valve has The second communication position and the second disconnection position, the second communication position communicates with the first working position and the outside world respectively. The assisted steering system of the vehicle and the self-driving vehicle rationally use the excess flow of the braking system, which can reduce system heat generation, save steering pumps and flow valves, and the whole system has a simple structure and can simplify the layout of the oil pump.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a vehicle auxiliary steering system and an automatic driving vehicle. Background technique [0002] Tire cranes are widely used in construction sites, field oil fields, warehouses, freight yards, logistics bases and other places for heavy lifting operations, short-distance transfers, and lifting and driving operations in narrow sites. Through the combination of main rotation and auxiliary rotation, front wheel steering, rear wheel steering, four-wheel steering and crab steering can be realized. Rough terrain cranes can achieve a smaller turning radius in a special working environment during low-speed driving, which is fast in response, reliable and simple. [0003] The auxiliary steering generally has the following forms: 1. The accumulator is used as the auxiliary steering to cooperate with the electric proportional flow valve and the front wheel steering angle sensor to realize the rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/06B62D5/07B62D5/08
CPCB62D5/062B62D5/075B62D5/08
Inventor 蔡伟刘丹杰李林
Owner SANY AUTOMOBILE HOISTING MACHINERY