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Hydraulic control system for automatic transmission of commercial vehicle and commercial vehicle

A technology of hydraulic control system and commercial vehicle, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as performance not meeting the requirements of shifting smoothness, and achieve no hesitation, The effect of reducing control pressure and control accuracy requirements and improving ride comfort

Pending Publication Date: 2018-12-21
SUZHOU KAIBO YIKONG DRIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a commercial vehicle automatic transmission hydraulic control system and the commercial vehicle, in order to solve the technical problem that the performance of the existing hydraulic control system cannot meet the requirements of shift smoothness

Method used

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  • Hydraulic control system for automatic transmission of commercial vehicle and commercial vehicle
  • Hydraulic control system for automatic transmission of commercial vehicle and commercial vehicle
  • Hydraulic control system for automatic transmission of commercial vehicle and commercial vehicle

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Embodiment Construction

[0027] The following will combine Figure 1 to Figure 3 The hydraulic control system of the automatic transmission of commercial vehicles provided by the present invention is described in detail. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection of the present invention The scope is not limited to the following examples, and those skilled in the art can modify and polish them within the scope of not changing the spirit and content of the present invention.

[0028] see Figure 1-3 A hydraulic control system for an automatic transmission of a commercial vehicle includes an actuator, a high-pressure oil circuit, a low-pressure oil circuit, and at least two oil circuit switching units.

[0029] The actuator is controlled by the oil circuit switching unit to realize the switching between the working state and the non-working state. The actu...

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Abstract

The invention discloses a hydraulic control system for automatic transmission of commercial vehicle and a commercial vehicle, which comprises an executing device, a high-pressure oil way, a low-pressure oil way, and at least two oil-way switching units; wherein the oil way switching unit comprises a reversing valve, a control valve, and a switching circuit; a reversing valve and a control valve inthe same oil way switching unit formed a switching circuit in series; the oil way switching unit is connected with the execution device in one-to-one correspondence through the switching circuit; thehigh-pressure oil way is connected with each reversing valve in parallel; the low-pressure oil way comprises a first low-pressure oil way and a second low-pressure oil way, wherein the first low-pressure oil way is connected with each reversing valve in parallel , and the second low-pressure oil way connected with reversing valve and control valve at the same time, and each oil-way switching unitaccess the second low-pressure oil way after connected in parallel. According to the invention, the clutch of hydraulic control system for automatic transmission combined with the pressure has high smoothness, and the clutch engagement impact is reduced, and the time of oil way switching is shortened.

Description

technical field [0001] The invention relates to a hydraulic control system of a commercial vehicle and an automatic transmission, in particular to a hydraulic control system of an automatic transmission capable of smooth shifting. Background technique [0002] With the development of the automotive transmission industry, there are more and more hydraulic control schemes for transmissions. In traditional passenger cars, AT (Automatic Transmission), DCT (Dual Clutch Transmission) and CVT (Continuously Variable Transmission, In Continuously Variable Transmission), the hydraulic scheme is relatively mature. However, in the field of commercial vehicles, since the current commercial vehicles are mostly MT (Manual Transmission, manual transmission) and AMT (automatic transmission, which is the abbreviation of electromechanical automatic transmission), in the field of new energy, most of them are motor direct drive or With a reduction gearbox, transmission control rarely involves h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00F16H61/06
CPCF16H61/0009F16H61/0021F16H61/065
Inventor 郝庆军殷文海
Owner SUZHOU KAIBO YIKONG DRIVE TECH CO LTD
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