A hydraulic self-locking continuously variable transmission slip control device and control method
A continuously variable transmission, slip control technology, applied in transmission, belt/chain/gear, mechanical equipment, etc., can solve problems such as increasing the energy consumption of the electro-hydraulic control system, reducing the service life of the metal belt, and reducing the transmission efficiency.
Active Publication Date: 2021-09-21
XIANGTAN UNIV
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Problems solved by technology
In order to improve the transmission efficiency of the system and reduce the friction loss between the CVT pulley and the metal belt, the situation that the clamping force is too low should be avoided; if the clamping force is too large, the tension force of the metal belt will become smaller. If it is very large, it will reduce the service life of the metal belt, increase the energy consumption of the electro-hydraulic control system, and reduce the transmission efficiency
Method used
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Embodiment Construction
[0024] The present invention will be further described below in conjunction with accompanying drawing.
[0025] like figure 1 As shown, the present invention includes a continuously variable transmission, a hydraulic device and an electronic control unit 11 . The continuously variable transmission 19 includes a driving wheel, a driven wheel and a metal belt E, the driving wheel includes a movable bevel wheel A1 and a fixed bevel wheel C1, and the driven wheel includes a movable bevel wheel A2 and a fixed bevel wheel C2. The movable cone wheel A1 of the driving wheel is provided with a speed sensor I26, and the movable cone wheel A2 of the driven wheel is provided with a speed sensor II18.
[0026] The hydraulic device includes a speed ratio control hydraulic circuit and a clamping force control hydraulic circuit. The speed ratio control hydraulic circuit includes oil tank 1, filter I2, differential pressure variable pump 3, adjustable throttle valve 7, non-adjustable throttl...
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The invention discloses a slip control device and control method of a hydraulic self-locking continuously variable transmission, comprising a continuously variable transmission, a hydraulic device and an electronic control unit; the continuously variable transmission comprises a driving wheel, a driven wheel and a metal belt E, The driving wheel includes a movable cone wheel and a fixed cone wheel, and the driven wheel includes a movable cone wheel and a fixed cone wheel. The movable cone wheel of the driving wheel and the movable cone wheel of the driven wheel are respectively provided with speed sensors; The device includes a speed ratio control hydraulic circuit and a clamping force control hydraulic circuit. The speed ratio control precision and the clamping force control precision of the present invention are high, and the response speed is fast; the present invention can realize that the continuously variable transmission is always maintained in the best slip range, improves the transmission efficiency, and prolongs the fatigue life of the metal belt; the present invention can realize The output flow of the hydraulic pump is self-adapted to the flow required by the hydraulic cylinder of the driving and driven wheels of the continuously variable transmission, thereby reducing the hydraulic loss.
Description
technical field [0001] The invention relates to a slip control device and control method of a hydraulic self-locking continuously variable transmission. Background technique [0002] The CVT electro-hydraulic control system provides suitable clamping pressure for the metal belt, reducing the energy loss of the system. In order to improve the transmission efficiency of the system and reduce the friction loss between the CVT pulley and the metal belt, the situation that the clamping force is too low should be avoided; if the clamping force is too large, the tension force of the metal belt will become smaller. If it is very large, it will reduce the service life of the metal belt, increase the energy consumption of the electro-hydraulic control system, and reduce the transmission efficiency. According to the driving conditions of the vehicle, if the clamping force of the metal belt is to be adjusted within a reasonable range by the CVT electro-hydraulic control system, it is n...
Claims
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IPC IPC(8): F16H9/04F16H9/18
CPCF16H9/04F16H9/18
Inventor 刘金刚郑剑云傅兵陈建文王高升
Owner XIANGTAN UNIV