Pressure control method for removing and engaging gears in automatic wet dual-clutch transmission
A wet dual-clutch, pressure-controlled technology used in transmission control, toothed components, machine gear/transmission testing, etc., to solve problems such as command pressure deviation
Active Publication Date: 2018-04-06
CHINA FIRST AUTOMOBILE
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Problems solved by technology
However, under non-EOL test conditions, the corresponding relationship between current and pressure will change greatly when the oil temperature changes and the pressure of the main oil circuit changes. There is a large deviation from the command pressure
Method used
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Embodiment Construction
[0046] The present invention will be further described below in conjunction with accompanying drawing:
[0047] Such as figure 1 It is a structural diagram of the hydraulic system of the automatic wet dual-clutch transmission of the present invention for removing and engaging gears. The pressure electromagnetic valve for removing and engaging gears in this system adopts a VBS electromagnetic valve, and the adjustment of the pressure for removing and engaging gears is realized by adjusting the current of the electromagnetic valve.
[0048] The present invention carries out the test of the corresponding relationship between current and pressure by a qualified test sample box under some specific main oil circuit pressures and gearbox oil temperatures, and organizes the test data into forms such as Table 1 and Table 2 .
[0049] Such as figure 2 As shown, a method for controlling the shifting pressure of an automatic wet dual-clutch transmission is characterized in that it cal...
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The invention relates to a gear shifting pressure control device for an automatic wet type double-clutch transmission. The device is characterized by comprising the following steps: calculating gear shifting pressure compensation values in different oil temperatures and main oil circuit pressures; and setting current gear box oil temperature to be T, current main oil circuit pressure to be L, and the gear shifting pressure of a command to be P, and calculating the gear shifting pressure compensation values required for different main oil circuit pressures and different gearbox oil temperatures by carrying out test on a gearbox sand carrying out analytical processing on the test data of the gearbox, so as to realize accurate control on the gear shifting pressure. According to the invention, by utilizing a test data table with limited main oil circuit pressure and gearbox oil temperature, excellent follow-up of the gear shifting pressure can be achieved in all intervals of the main oil circuit pressure and gearbox oil temperature in normal work of the gearbox according to a gear shifting pressure compensation algorithm.
Description
technical field [0001] The invention relates to a pressure control method for gear removal and engagement of an automatic wet dual-clutch transmission, relates to a method for precisely controlling the pressure of a hydraulic system for gear removal and engagement, and belongs to the technical field of automatic control of automatic wet dual-clutch transmissions. Background technique [0002] Wet dual-clutch transmission is a kind of automatic transmission scheme, and its structure is relatively familiar. In this transmission system, the action of the actuator for removing and engaging gears generally uses a hydraulic system as a power source. The control accuracy of the gear removal and engagement pressure in the hydraulic system has a great influence on the quality of the gear removal and engagement action. The low pressure control accuracy of gear removal and engagement will lead to long operation time of gear removal and engagement, low success rate of gear removal and ...
Claims
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IPC IPC(8): F16H59/02F16H61/00G01M13/02
CPCF16H59/02F16H61/0021F16H2306/00F16H2710/00G01M13/02
Inventor 曹龙闫涛唐忌张荣辉熊杰张广辉
Owner CHINA FIRST AUTOMOBILE