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Automatic gear shifting control device of wheeled tractor and control method thereof

A wheeled tractor, automatic shifting technology, applied in transmission control, mechanical equipment, belt/chain/gear and other directions, can solve problems such as affecting the quality of work, tractor flameout, etc., to achieve simple structure, sensitive action, and reduce lag time. Effect

Active Publication Date: 2018-11-06
HUNAN AGRICULTURAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Normally, during the shifting process, the power will be temporarily interrupted, but when the vehicle is in pure driving condition, due to the inertia of the high-power tractor itself, there will be obvious frustration during the shifting period. In severe cases, the tractor Even flameout, seriously affecting the quality of work

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  • Automatic gear shifting control device of wheeled tractor and control method thereof

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Embodiment Construction

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more fully and in detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0030] Such as figure 1 As shown, an automatic shift control device for a wheeled tractor includes a hydraulic control main oil circuit system 1, a clutch control oil circuit system 2, a shift control oil circuit system 3, and a tractor ECU 4 that controls the above three systems. The hydraulic control main oil circuit system 2 is connected to the hydraulic control main oil circuit system 1 through the pressure limiting valve 5, and the shift control oil circuit system 3 is respectively connected to the hydraulic control main oil circuit system 1 and the clutch control oil circuit through the gear control valve 6 and the pressure reducing valve 7. The system ...

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Abstract

The invention discloses an automatic gear shifting control device of a wheeled tractor. The device comprises a hydraulic control main oil path system, a clutch control oil path system, a gear shiftingcontrol oil path system and a tractor ECU for controlling the three systems; the clutch control oil path system is connected with the hydraulic control main oil path system through a pressure limiting valve, the gear shifting control oil path system is connected with the hydraulic control main oil path system and the clutch control oil path system through a gear control valve and a pressure reduction valve, and the hydraulic control main oil path system comprises an energy storage device, an oil tank, a hydraulic pump and an oil returning electromagnetic valve. The tractor ECU is further connected with an accelerator pedal used for detecting the accelerator opening degree changes and provided with a position sensor; the invention further comprises a control method of the device. Parameters of the tractor engine accelerator opening degree and the speed change are adopted to serve as gear shifting basis, gear shifting labor saving and convenient operation can be achieved, operation strength of a driver is effectively reduced, and speed change gear shifting smoothness of a high-power tractor in the work running process can be improved.

Description

technical field [0001] The invention relates to the field of agricultural equipment, in particular to an automatic shift control device for a wheeled tractor and a control method thereof. Background technique [0002] Due to the relatively large changes in the resistance of the farmland surface and soil, the traction resistance of the tractor also changes greatly during operation. In order to improve the economy of high-power tractors, it is necessary to shift gears in time according to changes in parameters such as road resistance, wheel speed, and traction, so that the engine can be in the best working section. Normally, during the shifting process, the power will be temporarily interrupted, but when the vehicle is in pure driving condition, due to the inertia effect of the high-power tractor itself, there will be obvious frustration during the shifting period. In severe cases, the tractor Even flameout seriously affects the quality of the work. Therefore, in order to ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H59/44F16H59/18F16H59/38F16H61/40F16H61/30F16H63/02
CPCF16H59/18F16H59/38F16H59/44F16H61/0206F16H61/0213F16H61/30F16H61/40F16H63/02F16H2059/183
Inventor 彭才望孙松林唐琦军肖名涛夏慧
Owner HUNAN AGRICULTURAL UNIV
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