Automatic gearbox built-in electronic parking control system and control method thereof

Abstract

The invention discloses an automatic gearbox built-in electronic parking control system and a control method thereof. The control system involves a valve body containing a valve body inner cavity I and a valve body inner cavity II, a parking auxiliary valve element, a spring, an end plug, a parking valve element, a parking switch valve, a parking locking electromagnetic valve containing a clampingclaw, oil supply cavities and an oil path, wherein the parking auxiliary valve element, the spring and the end plug are matched with the valve body inner cavity I to form at least one seal section, the parking valve element, the parking switch valve, the parking locking electromagnetic valve, the oil supply cavities and the oil path are matched with the valve body inner cavity II to form at leastone seal section, the oil supply cavities comprise the switch valve oil supply cavity, the clutch oil cavity and the main oil path oil cavity, and the valve element diameter at a first sealing surface on the left side of the parking auxiliary valve element is smaller than the valve element diameter at a second sealing surface. According to the system and the method, the problems of low automationdegree, large size and safety risk of an existing parking system are solved.

Description

technical field [0001] The invention relates to the technical field of automatic transmissions for automobiles, in particular to an electronic parking control system with a built-in automatic transmission and a control method thereof. Background technique [0002] At present, most of the automatic transmissions of automobiles use mechanical control to shift gears. When parking, the driver needs to manipulate the shift lever to hang into the P gear. This method requires the arrangement of mechanical shift levers and zippers, which also requires a lot of space for the layout, and also requires relatively high driving skills for the driver. With the development of automatic driving technology, electronic shifting technology is more and more widely used in automatic transmissions, but unlike the switching of D / N / R gears, P gear switching also needs to control the actuator to lock / unlock the transmission Mechanism, in the existing electronic shifting technology, the solenoid val...

AI Technical Summary

Problems solved by technology

With the development of automatic driving technology, electronic shifting technology is more and more widely used in automatic transmissions, but unlike the switching of D / N / R gears, P gear switching also needs to control the actuator to lock / unlock the transmission Mechanism, in the existing electronic shifting technology, the solenoid valve is generally used to control the oil circuit, thereby controlling the parking mechanism, but once the solenoid valve fails, it is easy to misoperate the parking mechanism, and there is a safety risk

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