Hydraulic-mechanical transmission engineering machinery automatic shifting speed variator and control method

A technology of automatic shifting and transmission engineering, applied in transmission control, mechanical equipment, components with teeth, etc., can solve the problems of increasing unsafe factors, distracting drivers, frequent shifting operations, etc., to reduce shifting. The effect of gear shift labor intensity, stable and fast automatic gear shifting, and preventing the effect of starting the car in gear

Active Publication Date: 2008-07-09
TIANJIN ENG MACHINERY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the loader is working continuously, the number of shifts is hundreds of times per hour, and the shifting operation is very frequent. During the operation, it is necessary not only to control the

Method used

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  • Hydraulic-mechanical transmission engineering machinery automatic shifting speed variator and control method
  • Hydraulic-mechanical transmission engineering machinery automatic shifting speed variator and control method
  • Hydraulic-mechanical transmission engineering machinery automatic shifting speed variator and control method

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Embodiment Construction

[0064] In order to further understand the content, characteristics and effects of the present invention, the following examples of the electro-hydraulic shifting transmission device with an electronically controlled engine are exemplified, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0065] As shown in Figure 1, the device includes an electro-hydraulic gearshift transmission device, a microcomputer controller, an electronically controlled engine controller, a gearbox output speed sensor, a torque converter turbine speed sensor (the transmission ratio of each gear of the gearbox can also be used) , the torque converter turbine speed is obtained by calculating the output speed of the gearbox, thereby omitting the sensor), shift handle switch, shift mode selection switch, automatic mode direction switch, brake pressure switch, start relay, brake power cut-off switch. The electronically controlled engine controller communicates with the ...

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Abstract

The invention relates to a mechanical automatic shift speed-changing device in hydraulic mechanical transmission engineering and a control method thereof. The device comprises an electro-hydraulic shift speed-changing unit, an electro-hydraulic engine, a microcomputer controller, an electro-hydraulic motor controller, a transmission case output rotational speed sensor, a shifting handle switch, a shifting mode selection switch, a brake pressure switch and an automatic direction switch. The electro-hydraulic motor controller is communicated with the microcomputer controller. The transmission case output rotational speed sensor, a torque converter turbine speed sensor, a shifting handle, the shifting mode selection switch, the brake pressure switch and the automatic direction switch serve to input signals to the input port of the microcomputer controller. The microcomputer controller serves to input control signals to a transmission case control module by the output port thereof. Based on the combination of two shift methods, the inventive device has the advantages of good economical efficiency, power efficiency and practicability, low energy consumption, automatic shift with high work efficiency, less working time, reduced labor intensity of the driver, and suitability for various working conditions.

Description

technical field [0001] The invention belongs to a hydromechanical transmission engineering machine, in particular to an automatic gear shifting device and a control method of the hydraulic mechanical transmission engineering machine. Background technique [0002] In order to improve the adaptability to external loads of currently known mobile construction machinery such as loaders, the main drive system usually adopts the form of hydromechanical transmission. The power of the internal combustion engine, through the torque converter and gearbox, finally drives the whole machine Mechanism (transaxle and tire system). However, the transmission efficiency of the hydromechanical transmission is low, especially when the heavy load requires a large output, the transmission efficiency of the hydraulic torque converter drops sharply, or even drops to zero, which reduces the working efficiency and causes waste of energy. The wasted energy increases the oil temperature, brings about ...

Claims

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Application Information

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IPC IPC(8): F16H61/00F16H61/28F16H59/04F16H59/14F16H59/50F16H59/74
Inventor 李莺莺邵善锋李学忠孟广良吴国祥崔国敏王瑞霞
Owner TIANJIN ENG MACHINERY INST
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