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Output power cut-off control system and method of construction machinery gearbox

A transmission control and power cut-off technology, applied in transmission control, mechanical equipment, gear shifting mechanism, etc., can solve problems such as shock generation, and achieve the effects of reducing power shock, improving service life, and improving work comfort.

Active Publication Date: 2019-12-17
GUANGXI LIUGONG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the shortcoming that the existing construction machinery gearbox output power cutoff control system will produce shock when cutting off power or restoring power output, and to provide a transmission that can reduce the shock when cutting off power or restoring power output Box output power cutting control system and method

Method used

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  • Output power cut-off control system and method of construction machinery gearbox
  • Output power cut-off control system and method of construction machinery gearbox
  • Output power cut-off control system and method of construction machinery gearbox

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Embodiment Construction

[0021] The specific implementation will be described below in conjunction with the accompanying drawings.

[0022] The output power cut-off control system of the construction machinery gearbox in this embodiment includes a hydraulic braking system. The hydraulic braking system is as follows: figure 1 As shown, the hydraulic braking system includes brake pump 1, high pressure filter 2, liquid charging valve 3, accumulator 4, brake valve 5, pressure sensor 6, brake 7, oil return filter 8, fuel tank 9 and other components. The oil inlet of the brake pump 1 is connected to the fuel tank 9, the oil outlet is connected to the oil inlet of the high-pressure filter 2, the oil inlet of the filling valve 3 is connected to the oil outlet of the high-pressure filter 2, and the oil return port passes through the oil return port. The filter 8 is connected to the oil tank 9, the liquid filling port of the liquid charging valve 3 is connected to the oil inlet of the accumulator 4 and the brak...

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Abstract

The invention relates to engineering machine speed changing box power cut-off control, aims at overcoming the defect that when an existing speed changing box power output cut-off control system cuts off power output or recovers power output, impacts can be generated, and discloses an engineering machine speed changing box power output cut-off control system and method. According to the braking pressure, the joint degree of a power cut-off clutch in a speed changing box is controlled; when the braking pressure value is smaller than P1, the joint degree of the power cut-off clutch is 100%; whenthe braking pressure value ranges from P1 to P2, the joint degree of the power cut-off clutch ranges from 0% to 100% and is reduced along with increasing of the braking pressure value; and when the braking pressure value is larger than P2, the joint degree of the power cut-off clutch is 0%. The slope control principle is used in the engineering machine speed changing box power output cut-off control system and method for controlling the power output of the speed changing box, disengaging and engaging of the power cut-off clutch are gradually changed, power cut-off and recovery are stable, theimpacts are reduced, the service life of power components is prolonged, and the work comfort is improved.

Description

technical field [0001] The present invention relates to a construction machinery gearbox, and more specifically, to a gearbox output power cut-off control system and method. Background technique [0002] In the field of wheel-driven walking machinery, such as loaders and other construction machinery, in order to protect the gearbox and engine when braking the machine, it is usually necessary to cut off the power output on the gearbox. In order to cut off the power output of the gearbox, the gearbox includes a gearbox control unit, a cutoff control valve, and a power cutoff clutch. The TCU (Transmission Control Unit) controls the engagement or disconnection of the power cut-off clutch through the cut-off control valve to realize the cut-off or output of the output power. [0003] The existing gearbox cut-off control is based on the mechanical brake as the criterion, that is, the angle sensor detects the angle of the brake pedal of the machine, and when the brake pedal rotati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/54F16H61/02F16D48/06F16D121/18
CPCF16D48/064F16D2121/18F16H59/54F16H61/0202
Inventor 刘光喜白健信李良周李大尤
Owner GUANGXI LIUGONG MASCH CO LTD
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