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Hydro-mechanical transmission engineering machinery automatic upshift gear changes and control method

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

Inactive Publication Date: 2008-05-14
TIANJIN ENG MACHINERY INST
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

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 walking, but also to operate the working device. Frequent shifting operations distract the driver's attention and affect the Increased productivity, but also increased the unsafe factors of walking

Method used

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  • Hydro-mechanical transmission engineering machinery automatic upshift gear changes and control method
  • Hydro-mechanical transmission engineering machinery automatic upshift gear changes and control method
  • Hydro-mechanical transmission engineering machinery automatic upshift gear changes and control method

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Embodiment Construction

[0064] In order to further understand the content, characteristics and effects of the present invention, a loader is used as an example to provide an intelligently controlled hydraulic mechanical transmission construction machinery automatic gear shifting device, and the details are as follows in conjunction with the accompanying drawings:

[0065] As shown in Figure 1, the device includes an electro-hydraulic shift transmission device, a microcomputer controller, an engine crankshaft output speed sensor, a gearbox output speed sensor, a shift handle switch, a shift mode selection switch, an automatic mode direction switch, an electric Accelerator position potentiometer, brake pressure switch, start relay, brake power cut-off switch, accelerator pedal position potentiometer and electric accelerator actuator. Engine output speed sensor, gearbox output speed sensor, shift handle switch, shift mode selector switch, electric accelerator position potentiometer, automatic mode direct...

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Abstract

The invention relates to a hydraulic mechanical transmission engineering machine automatic gear shifting device and a control method, comprising an electrohydraulic gear shifting device, a microcomputer controller, an engine rotation speed sensor, and a gearbox output rotation speed sensor, a gear shifting handle switch, a gear shifting mode selection switch, an electric control gun position potentiometer and an automatic mode direction switch; the engine rotation speed sensor, the gearbox output rotation speed sensor, the gear shifting handle, the gear shifting mode selection switch, the electric control gun position potentiometer and the automatic mode direction switch input signals to an input port of the microcomputer controller which controls the signals to be output to a gearbox control module through an output port. The invention adopts two gear shift combination, has economics, power and practicability, and reaches the object of saving energy; the automatic gear shifting leads the engineering machine to improve the working efficiency, save the working time, reduce the labor intensity of the drivers, and be suitable for different working conditions.

Description

technical field [0001] The invention belongs to a hydraulic mechanical transmission engineering machine, in particular to an automatic gear shifting device and a control method for a hydraulic mechanical transmission engineering machine. Background technique [0002] At present, in order to improve the adaptability to external loads of known mobile construction machinery such as loaders, the main transmission system usually adopts the form of hydromechanical transmission, and the power of the internal combustion engine finally drives the walking of the whole machine through a hydraulic torque converter and a gearbox. mechanism (transaxle and tire system). However, the transmission efficiency of hydromechanical transmission is relatively low, especially when heavy loads require high output power, the transmission efficiency of the hydraulic torque converter drops sharply, or even drops to zero, which reduces the operating efficiency and causes waste of energy. The wasted en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/00F16H59/04
Inventor 李莺莺邵善锋李学忠孟广良吴国祥崔国敏
Owner TIANJIN ENG MACHINERY INST
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