Gear shifting control method and system of two-gear automatic gearbox

Abstract

The invention belongs to the field of automobile transmission systems and particularly provides a gear shifting control method and system of a two-gear automatic gearbox. The method and system are used for solving the problem that gear shifting impact exists during gear shifting of a two-gear automatic gearbox in the prior art. For solving the problem, the gear shifting control method provided by the invention comprises the following steps that the driving intention of a driver is identified; a target gear is determined according to the driving intention; and a first clutch and a second clutch are closed or disengaged according to a set mode, and accordingly the current gear of an automobile is shifted to the target gear. Through the gear shifting control method provided by the invention, the sliding friction degree between the first clutch and the second clutch can be controlled in a coordinated mode, that is, when one clutch is closed, the other clutch is slowly disengaged; and the gear shifting process of the two-gear gearbox can be smooth and free of gear shifting impact.

Description

Technical field [0001] The invention belongs to the field of automobile transmission systems, and specifically provides a shift control method and a shift control system of a two-speed automatic transmission. Background technique [0002] The dual-clutch automatic gearbox is not only shorter than the mechanical automatic gearbox in terms of shifting time, but also can compensate for the power interruption during the shifting process by coordinating the closing or disengaging of the two clutches during the shifting process. Therefore, dual-clutch automatic transmissions are being widely used in electric vehicles. [0003] However, during the shifting process of the dual-clutch automatic transmission, a certain speed difference will occur between the clutch driving disc and the clutch driven disc driven by the drive motor when the clutch is closed or disengaged, and the inertia of the transmission system itself will cause A certain torsional vibration will bring a certain degree of ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of the shifting shock when the two-speed automatic transmission is shifted in the prior art, the present invention provides a shift control method for the two-speed automatic transmission. The two-speed automatic transmission includes a first clutch and a second clutch, and the shifting of gears is realized by closing or separating the driving disc and the driven disc of the first clutch or the second clutch, so The shift control method includes the following steps: identifying the driver's driving intention; determining the target gear according to the driving intention; closing or disengaging the first clutch and the second clutch according to a set method, and then turning the car Switch from current gear to target gear

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