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

Excavator electronic-control positive flow control method

A control method and positive flow technology, which is applied to earth movers/excavators, construction, etc., can solve the problems of high engine speed drop and instability, and achieve the effects of reducing fuel consumption, preventing large changes, and avoiding drastic changes

Active Publication Date: 2017-09-26
LIUZHOU LIUGONG EXCAVATORS +2
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an excavator that prevents the drastic change of the engine and improves the stability of the excavator when the excavator is working, aiming at the problem of large engine speed drop and instability in the initial loading stage of the action in the control of the existing excavator. Electromechanical Positive Flow Control Method

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
  • Excavator electronic-control positive flow control method
  • Excavator electronic-control positive flow control method
  • Excavator electronic-control positive flow control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The specific implementation will be described below in conjunction with the accompanying drawings.

[0045] In this embodiment, each pilot hydraulic pipeline in the excavator is equipped with a low-pressure pressure sensor, and the main hydraulic pump is equipped with a pressure sensor and a proportional decompression solenoid valve for controlling the displacement of the main hydraulic pump. The positive flow control of the excavator is electronically controlled method, its control flow is as follows figure 1 shown, including the following steps:

[0046] S1: Collect the pilot pressure values ​​corresponding to each action of the excavator, calculate the positive flow displacement required for each pilot pressure according to the matching relationship of "pilot pressure-pump displacement", and take the maximum value as the positive flow rate. The displacement D1 required by the flow control pump;

[0047] S2: Calculate the pump power P1 required by the current pilot ...

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 relates to excavator power control and provides an excavator electronic-control positive flow control method. The excavator electronic-control positive flow control method aims to solve the problems that during existing excavator control, in the initial action loading stage, the engine is large in deceleration and unstable. The excavator electronic-control positive flow control method comprises the following steps that the pilot pressure values of all pipelines corresponding to all actions of the excavator are collected, the needed positive flow displacements corresponding to the pilot pressures of all the pipelines are calculated, and the maximum value of the positive flow displacements is used as the needed displacement D1 of a positive flow control pump; the current needed pilot pump power P1 is calculated according to the pilot pressure values of all the pipelines; according to P1, time for an action drive a hydraulic actuating piece to be in an action state from a static state, the reduction rate of the rotation speed of the engine and the change rate of the main pump pressure, the power P3 of the power control pump is calculated; according the P3,the rotation speed of the engine and the main pump pressure, the displacement D2 needed by the power control pump is calculated; the rotation speed of the engine is collected, and the pump displacement decrease value D4 is calculated; D4 minus the smaller one of the D1 and the D2 is the pump control displacement D5, and the D5 is converted into a current for control over the displacement of the hydraulic pump.

Description

technical field [0001] The invention relates to an excavator control, in particular to an excavator electric control positive flow control method. Background technique [0002] The existing positive flow control technology simply collects the pressure of each pilot hydraulic line and the pressure of the main pump, and then converts the displacement required for positive flow control according to the pilot pressure, and then converts it to the constant pressure calculated based on the pressure of the main pump. The displacement required for power control is compared, and the smaller value is taken as the output current. [0003] In fact, this control method does not take into account that when the pilot pressure increases rapidly from zero to the maximum, the current increases rapidly. At this time, the main hydraulic pump is in a process of "from static to dynamic", and the main hydraulic pump absorbs the power of the engine. It is an incremental process. At this time, if a...

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): E02F9/22
CPCE02F9/2242E02F9/2246
Inventor 董必成梁明孔戴群亮李文新王茄任
Owner LIUZHOU LIUGONG EXCAVATORS
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