Pressure control electromagnetic valve for automatic transmission

Abstract

The invention provides a pressure control electromagnetic valve for an automatic transmission. The pressure control electromagnetic valve for the automatic transmission comprises an electromagnetic head, a valve element, a valve sleeve, a spring and a feedback pin. The valve sleeve is provided with an inner cavity, multiple oil supply openings, multiple oil outlets and multiple oil drainage ports.The multiple oil supply openings are evenly arranged on the first circumference of the inner cavity. The multiple oil outlets are evenly arranged on the second circumference of the inner cavity. Themultiple oil drainage ports are evenly arranged on the third circumference of the inner cavity. The valve element, the feedback pin and the spring are sequentially arranged in the inner cavity. Alongwith axial movement of the valve element, the oil supply openings, the oil outlets and the oil drainage ports are made to communicate with one another or not. The electromagnetic head is used for enabling the valve element to axially move and squeeze the feedback pin provided with the spring when electrified. When the electromagnetic head is powered off, the spring enables the feedback pin to drive the valve element to return to the initial position. The pressure control electromagnetic valve for the automatic transmission can improve the response speed of an electromagnetic valve and improvethe low-temperature performance of the whole vehicle.

Description

technical field [0001] The invention relates to the field of automobile auxiliary technology, in particular to a pressure control solenoid valve used in an automatic transmission. Background technique [0002] At present, the dual-clutch gearboxes on the market generally adopt the electronically controlled hydraulic control mode. This type of gearbox realizes the control of the main oil circuit, the shift branch circuit and the clutch branch circuit through the solenoid valve in the hydraulic module. The clutch pressure control valve in the gearbox combines the steel plate of the clutch with the friction plate by adjusting the pressure of the clutch branch, so as to realize the transmission of power from the engine end to the shaft system of the gearbox, and then realize the movement of the whole vehicle. Therefore, fast and precise pressure control has an important impact on the drivability of the vehicle. [0003] At present, in the process of solenoid valve development a...

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Problems solved by technology

[0004] The invention provides a pressure control solenoid valve for an automatic transmission, which solves the problem that the existing solenoid valve has a high oil viscosity in the transmission and tends to have low response characteristics, can improve the response speed of the solenoid valve, and improve the low-temperature performance of the whole vehicle

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