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

High-horsepower tractor down-shift control method considering speed regulation characteristic of diesel engine

A technology of power downshifting and control methods, which is applied in the direction of transmission control, mechanical equipment, and components with teeth, etc., can solve the problems of transmission system component damage, diesel engine flameout, and large power loss, so as to avoid parking and downshifting. gears, reduce shifting time, and avoid parasitic power effects

Active Publication Date: 2017-09-12
HEFEI UNIV OF TECH
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of power downshifting, it is necessary to reasonably control the actuating pressure of the disengagement and engagement clutches. Since the diesel engine generally works in the speed regulation area, when the diesel engine speed decreases due to the increase of the load, the torque of the diesel engine increases, and when the torque of the diesel engine increases Large, the speed of the diesel engine rises, if the shift control is unreasonable, it will cause excessive power loss or the diesel engine stalls
[0004] In the process of clutch pressure control, it is especially necessary to avoid the generation of parasitic power, which is also called circulating power. In addition to causing unnecessary energy loss, this power will also cause great damage to the components of the transmission system.

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
  • High-horsepower tractor down-shift control method considering speed regulation characteristic of diesel engine
  • High-horsepower tractor down-shift control method considering speed regulation characteristic of diesel engine
  • High-horsepower tractor down-shift control method considering speed regulation characteristic of diesel engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] Embodiment: In this embodiment, the tractor upshift control method of the present invention is used to control the power shift transmission of a certain type of high-horsepower tractor from 4 gears to 3 gears.

[0077] refer to figure 2 , C 1 、C 2 、C 3 and C 4 are shifting clutches respectively, when clutch C 1 、C 2 disengagement, clutch C 3 、C 4 When engaged, the gear of the power shift transmission is 4th gear; when clutch C 1 、C 4 Engage, clutch C 2 、C 3 When disengaged, the gear position of the power shift transmission is 3rd gear; when the gear position of the transmission is lowered from 4th gear to 3rd gear, the clutch C 1 From disengaged to engaged, clutch C 3 From engaged to disengaged, power flow gradually from clutch C 3 transition to clutch C 1 ;

[0078] The power system parameters of the high-horsepower tractor are as follows: the maximum torque transmitted by the clutch is 380N.m; the engine is a diesel engine with a rated power of 100kw, ...

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 high-horsepower tractor down-shift control method considering the speed regulation characteristic of a diesel engine. The high-horsepower tractor down-shift control method considering the speed regulation characteristic of the diesel engine comprises the steps that firstly, the power down-shift control parameter of a tractor is determined; and secondly, the power down-shift control process of the tractor is divided into a shift preparation stage, a rotation speed synchronizing stage, a gear overlapping stage and an engaging strengthening stage, then the purpose that in the power down-shift process, a variable-speed transmission system always keeps a large output torque is achieved, and meanwhile it is guaranteed that the diesel engine avoids flameout. In this way, the tractor can be adapted to change of work resistance and continuously operate, and the operation efficiency is guaranteed.

Description

technical field [0001] The invention belongs to the field of high-horsepower tractor power transmission system control, and specifically relates to a downshift control method for a multi-clutch high-horsepower tractor power transmission system. Background technique [0002] Tractor work has the following characteristics: (1) Affected by agronomy and implement carrying capacity, it generally moves at a constant speed; (2) In order to improve productivity, the throttle opening is generally above 80%; (3) The working resistance will fluctuate, which is difficult for traditional manual transmissions. To adapt to changes in working resistance, it is necessary to stop and change gears; in view of the operating characteristics of tractors, a 'Power Shift' (power shift) transmission system has been proposed abroad, and the cost of tractors equipped with this transmission system is also relatively high. The transmission system effectively expands the working resistance range of the t...

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
IPC IPC(8): F16H61/02F16H61/26F16H59/56
CPCF16H59/56F16H61/0204F16H61/26
Inventor 夏光施信信邹斌闫瑞琦郑友滑杨莹郭东云杜克谢海
Owner HEFEI UNIV OF TECH
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