Oil charge control method for clutch in automatic transmission

Abstract

The invention discloses an oil charge control method for a clutch in automatic transmission, and relates to the technical field of control of automatic transmission. In order to solve the problems that an oil charge control method for a clutch in a current automatic transmission is not precise in control and great in working task load. The oil charge control method for the clutch in the automatic transmission comprises the following steps: step I, after a vehicle is started, applying current of 0.25-0.35A, according to electrical characteristics of a solenoid valve, to the solenoid valve, keeping a small aperture of a solenoid valve plunger piston, enabling the corresponding clutch to establish small oil pressure and keeping the small oil pressure; step II, continuously keeping fixed current of the solenoid valve for 140-160 seconds, and guaranteeing that a clutch oil path is filled up with oil; and step III, carrying out corresponding Boost oil charge control on the clutch. According to the oil charge control method, software control and calibration work is simplified, and oil charge control accuracy of the clutch is also guaranteed.

Description

technical field [0001] The invention relates to an oil filling control method, in particular to a clutch oil filling control method in an automatic transmission, and belongs to the technical field of automatic transmission control. Background technique [0002] A typical automatic transmission includes a torque converter and a power train with multiple speed gearing coupled to the torque converter. In addition, a hydraulic control system is installed on the automatic transmission for selectively operating at least one operable element included in the power train according to the operating state of the vehicle. [0003] The hydraulic control system of the automatic transmission engages / disengages at least one operable element through hydraulic pressure generated by an oil pump to achieve an appropriate gear position corresponding to a vehicle speed and a throttle opening. [0004] After the vehicle is stopped and the engine is turned off, the oil pump stops working, and each...

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problems of inaccurate control and large workload of the existing clutch oil filling control method in automatic transmissions, and further provides a method that can simplify software control and calibration work, and at the same time ensure the accuracy of clutch oil filling control A revolutionary control method for clutch oil filling in automatic transmission

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