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Neutral-position parking implementation method and system based on electronic control HMT and agricultural machine

An electronic control and vehicle technology, applied in the field of electronic control HMT, can solve problems such as vehicle slipping and volumetric efficiency reduction

Active Publication Date: 2021-09-24
LOVOL HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volumetric efficiency of the variable pump is affected by the ambient temperature and the use time. The volumetric efficiency of the hydraulic power decreases with the increase of the use time, and when the handle is in the neutral position, the mechanical power is greater than the hydraulic power. situation, causing the vehicle to slip ahead

Method used

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  • Neutral-position parking implementation method and system based on electronic control HMT and agricultural machine
  • Neutral-position parking implementation method and system based on electronic control HMT and agricultural machine
  • Neutral-position parking implementation method and system based on electronic control HMT and agricultural machine

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Embodiment Construction

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0029] figure 1 It is a flow chart of a method for realizing neutral parking based on an electronically controlled HMT provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0030] S1, obtaining the rotational speed of the first shaft of the gearbox, the rotational speed of the motor, and the rotational speed of the output shaft of the gearbox in real time; determining the rotational speed of the planetary carrier according to the rotational speed of the first shaft of the gearbox and the rotational speed of the motor;

[0031] S2, in the vehicle calibration mode, perform vehicle state calibration according to the speed of the output shaft of the gearbox and the speed...

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Abstract

The invention relates to a neutral-position parking implementation method and system based on an electronic control HMT and an agricultural machine. The method comprises the steps of obtaining the rotating speed of a first shaft of a gearbox, the rotating speed of a motor and the rotating speed of an output shaft of the gearbox in real time; determining a planet carrier rotating speed according to a gearbox shaft rotating speed and a motor rotating speed; in the vehicle calibration mode, performing vehicle state calibration according to the rotating speed of a gearbox output shaft and the rotating speed of a planet carrier, and obtaining a vehicle state calibration current value; when the vehicle state changes and meets the preset condition, determining a PID adjusting current value according to the planet carrier rotating speed target value and the planet carrier rotating speed actual value through a PID strategy; and determining a median current value according to the sum of the vehicle state calibration current value and the PID adjustment current value, and assigning the median current value to an electromagnetic valve corresponding to the vehicle state. The vehicle state is determined according to the rotating speed of the output shaft of the gearbox, the current of the corresponding electromagnetic valve is adjusted in real time according to the rotating speed of the first shaft of the gearbox and the rotating speed of the motor, and then the rotating speed of the motor is adjusted, so that the vehicle speed is zero and vehicle sliding is avoided at the neutral position.

Description

technical field [0001] The invention relates to the technical field of electronically controlled HMT, in particular to a method, system and agricultural machinery for realizing neutral parking based on electronically controlled HMT. Background technique [0002] The planet carrier mechanism in the HMT gearbox is composed of a sun gear, a ring gear and a planet carrier. The ring gear transmits the power of the engine, and the sun gear transmits the hydraulic power of the electronically controlled proportional variable pump and motor. However, the volumetric efficiency of the variable pump is affected by the ambient temperature and the use time, and the volumetric efficiency of the hydraulic power decreases with the increase of the use time, and then when the handle is in the neutral position, the mechanical power is greater than the hydraulic power. situation, causing the vehicle to slip ahead. Contents of the invention [0003] The technical problem to be solved by the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/08B60W40/00B60W50/00
CPCB60W10/08B60W40/00B60W50/00B60W2050/0011B60W2050/0043B60W2510/1015B60W2510/104B60W2510/081B60W2710/081
Inventor 王乐刚于梅祥惠兆元倪云龙白永安臧运明毕伟成刘鑫
Owner LOVOL HEAVY IND CO LTD
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