Constant-torque power down-shift control method of high-horsepower tractor

A control method and constant torque technology, applied in transmission control, mechanical equipment, components with teeth, etc., can solve the problems of damage to parts of the transmission system, difficulty in constant torque output, and upshift jerk, and achieve no parasitics. Constant power, output torque, avoid the effect of parasitic power

Active Publication Date: 2017-09-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Parasitic power, also known as circulating power, can cause significant damage to drivetrain components in addition to unnecessary energy loss
There are many forms of tractor operation, such as traction, rotary tillage and harvesting. When operating, the power downshift needs to ensure the quality and efficiency of the tractor’s work. If the output torque of the tractor changes to

Method used

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  • Constant-torque power down-shift control method of high-horsepower tractor
  • Constant-torque power down-shift control method of high-horsepower tractor
  • Constant-torque power down-shift control method of high-horsepower tractor

Examples

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Embodiment

[0081] Embodiment: In this embodiment, the tractor downshift 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 down to 3 gears.

[0082] refer to figure 1 , 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 ;

[0083] The power system parameters of a certain type of high-horsepower tractor are as follows: the load torque T transmitted by the separation clutch L is 380N.m; piston cylinder pre-compre...

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PUM

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Abstract

The invention discloses a constant-torque power down-shift control method of a high-horsepower tractor. The power down-shift control process of the tractor is divided into a gear shifting preparation phase, a rotating speed synchronization phase, a gear overlap phase and a gear reinforcement phase; and through coordinative control of a joint clutch, a separation clutch and an engine, the purpose of a speed change transmission system always keeping constant-torque output in the power down-shift process is realized, so that the power gear shifting of the tractor is smooth without impact.

Description

technical field [0001] The invention belongs to the field of tractor power shift control, and specifically relates to a downshift control method for constant torque power of a multi-clutch high-horsepower tractor. technical background [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 tractor's continuous work, avoid...

Claims

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Application Information

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IPC IPC(8): F16H61/04
CPCF16H61/04F16H2061/009
Inventor 夏光施信信滑杨莹郭东云郑友闫瑞琦邹斌杜克谢海
Owner HEFEI UNIV OF TECH
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