Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Speed regulation control method for vehicle walking closed hydraulic system

A technology of hydraulic system and control method, which is applied in the direction of transmission control, fluid pressure actuation device, servo motor, etc., can solve problems such as vehicle speed fluctuations, achieve the effect of improving stability and avoiding large vehicle speed fluctuations

Pending Publication Date: 2021-10-08
CHINA RAILWAY CONSTR HEAVY IND
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply increasing or decreasing the displacement of hydraulic pumps and hydraulic motors can easily lead to fluctuations in vehicle speed during acceleration and deceleration or during driving.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Speed regulation control method for vehicle walking closed hydraulic system
  • Speed regulation control method for vehicle walking closed hydraulic system
  • Speed regulation control method for vehicle walking closed hydraulic system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0061] The core of the present invention is to provide a speed regulation control method of a closed hydraulic system for vehicle travel, which is applied to a closed hydraulic system for vehicle travel. By controlling the displacement ratio of the hydraulic pump and the displacement ratio of the hydraulic motor, the speed of the vehicle is controlled. Driving speed, because the change of the displacement ratio of the hydraulic pump and the displacement ratio o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a speed regulation control method for a vehicle walking closed hydraulic system. The speed regulation control method is applied to the vehicle walking closed hydraulic system. The speed regulation control method comprises the steps of acquiring the pump initial displacement ratio of a hydraulic pump in the initial state and the motor initial displacement ratio of a hydraulic motor in the initial state; controlling the displacement ratio of the hydraulic pump to be adjusted to a first target limit value according to the preset change rate; controlling the displacement ratio of the hydraulic motor to be adjusted to a second target limit value according to the preset change rate; and controlling the displacement ratio of the hydraulic pump and the displacement ratio of the hydraulic motor to be kept unchanged. According to the speed regulation control method for the vehicle walking closed hydraulic system, the speed change in the vehicle driving process can be controlled, thus, the circumstance that the speed fluctuation is large in the vehicle acceleration process is avoided, and the stability in the vehicle speed regulation process is improved.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, and more specifically, relates to a speed regulation control method of a vehicle running closed hydraulic system. Background technique [0002] In the existing agricultural harvesting machinery, two types of driving are mechanical transmission and hydrostatic transmission. Due to factors such as complex layout and large space occupation of mechanical transmission, it has been gradually replaced by hydrostatic transmission with simple layout, small size, light weight, simple operation and control, high degree of automation, and stepless speed regulation. [0003] In order to achieve a higher speed ratio range of the driving vehicle, the closed walking system generally adopts the composition method of the variable hydraulic pump and the variable hydraulic motor; when the closed walking system adopts this method, the displacement of the hydraulic pump is increased by increasing the di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/04F15B15/18F16H61/30
CPCF15B11/04F15B15/18F16H61/30
Inventor 刘飞香肖敏刘伟戴明慧陈晨全永统王平曲建华
Owner CHINA RAILWAY CONSTR HEAVY IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com