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A control method for a continuously variable speed tractor control system

A control system and control method technology, applied in the direction of mechanical equipment, combustion engines, internal combustion piston engines, etc.

Active Publication Date: 2017-12-05
洛阳汇四海机器人科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the prior art method is difficult to solve the contradiction between tractor economy and productivity well, the present invention provides a control method for the control system of the continuously variable tractor, which can ensure that the tractor can still achieve high productivity under the premise of obtaining high productivity. have good fuel economy

Method used

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  • A control method for a continuously variable speed tractor control system
  • A control method for a continuously variable speed tractor control system
  • A control method for a continuously variable speed tractor control system

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specific Embodiment

[0041] Specific embodiment: the present invention takes a certain type of Dongfanghong 400-horsepower wheeled tractor equipped with a hydraulic-mechanical continuously variable transmission as the object, and the main parameters of the system are: tractor vehicle mass m=7760kg, tractor main transmission ratio =36.348, transmission ratio The range is 0~2.24, the tractor driving wheel radius r d =0.9046m, engine rated power N e0 =228kw, the maximum output power of the engine =294kW, engine rated speed =2100(r / min), the maximum engine speed =2300(r / min), maximum engine torque =1200N·m, maximum traction force =80kN.

[0042] like figure 1 As shown, a continuously variable tractor tractor productivity-economic comprehensive optimum transmission ratio optimization calculation method, the steps are as follows:

[0043] (1) Set the limit speed and torque of the engine and the range of the HMCVT transmission ratio. The speed of the wheeled tractor in the field is mainly ...

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Abstract

The invention provides a stepless speed change tractor control system and a control method thereof. The control system comprises an engine, a hydraulic mechanical stepless speed changer, a vehicle speed sensor, a traction force sensor, an engine electronic control unit, a speed changer electronic control unit, and a speed changer hydraulic control unit. The stepless speed change tractor control system adopts NT / gT to characterize traction production efficiency-economical efficiency comprehensive optimum at maximum; an optimal speed changing ratio and an engine rotary speed, which meet the traction production efficiency-economical efficiency comprehensive optimum, are calculated through optimizing the speed changing ratio of the speed changer, so that the tractor has good fuel oil economical efficiency under the condition that the relatively large production rate is obtained.

Description

technical field [0001] The invention relates to a tractor control system, in particular to a control method for a continuously variable speed tractor control system. Background technique [0002] Tractor is an important tool for farmland operations. The complex working environment makes the traction load and driving speed of the tractor fluctuate greatly. The hydraulic mechanical continuously variable transmission can adapt to complex working conditions and greatly improve the performance of the vehicle. Generally, the working modes of continuously variable transmission tractors are divided into the working mode of maximum productivity and the best working mode of economy. Among them, in the working mode of maximum productivity, the fuel economy of the tractor is poor; It is the lowest point of consumption. At this time, if the traction load of the vehicle is suddenly increased, it is easy to cause the engine to stall. [0003] At present, in order to obtain greater product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/103B60W30/18
CPCB60W10/06B60W10/103B60W30/18Y02T10/40
Inventor 张明柱郝晓阳尹玉鑫王婷婷崔明明王全胜白东洋
Owner 洛阳汇四海机器人科技有限公司
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