Gear-shifting control method and system and engineering machinery for traction operation

A gear shift control and gear position technology, applied in the field of systems, construction machinery for traction work, and gear shift control methods, can solve the problems that the automatic gear shift technology of automobiles cannot be fully adapted

Inactive Publication Date: 2012-09-12
SHANTUI CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the operating conditions of engineering vehicles are obviously different from those of automobiles, the automatic shifting technology of automobiles cannot be fully adapted to construction machinery.

Method used

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  • Gear-shifting control method and system and engineering machinery for traction operation
  • Gear-shifting control method and system and engineering machinery for traction operation
  • Gear-shifting control method and system and engineering machinery for traction operation

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] The embodiment of the invention discloses a gear shift control method, system and construction machinery used for traction work, so as to realize automatic gear shift of the construction machinery used for traction work.

[0050] A shift control method disclosed in this embodiment, such as figure 1 shown, including steps:

[0051] S101. Obtain the turbine speed, engine speed and gear signal N under the current throttle state;

[0052] S102. Judging whether...

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Abstract

The invention discloses a gear-shifting control method, a gear-shifting control system and engineering machinery for traction operation. The gear-shifting control method comprises the following steps of: acquiring turbine speed, engine speed and a gear signal in the current accelerator state; keeping the current gear when the gear signal is a neutral position signal, otherwise calculating to obtain a speed ratio, wherein the speed ratio is a ratio of the turbine speed to the engine speed; keeping the current gear if the speed ratio is in a preset speed ratio range; reducing the gear when the speed ratio is lower than the minimum speed ratio in the preset speed ratio range and the gear signal is not the lowest gear signal; and raising the gear when the speed ratio is higher than the maximum speed ratio in the preset speed ratio range and the gear signal is not the highest gear signal.

Description

technical field [0001] The present invention relates to the technical field of engineering machinery, more specifically, to a shift control method, system and engineering machinery used for traction work. Background technique [0002] In order to improve the adaptability of construction machinery to harsh operating environments and working conditions, a hydraulic torque converter is added to the transmission system of traditional construction machinery for hydraulic mechanical transmission. This hydromechanical transmission device has many advantages of both hydraulic transmission and mechanical transmission, such as smooth start, rapid acceleration, etc.; at the same time, the transmission of power through liquid can reduce the dynamic load and vibration of the transmission system and prolong the use of the transmission system. Life, improve vehicle driving safety and passability. Generally, as long as the matching is reasonable, the problem of "flame-out" of the engine un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/46F16H59/70F16H59/54F16H61/02
Inventor 宋文龙张立银徐长重李宣秋刘存波张亮宋润洲冯西友李乃柱吕文彬
Owner SHANTUI CONSTR MASCH CO LTD
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