Oil pressure self-adaptive method and device based on PI control

Abstract

The invention provides an oil pressure self-adaptive method and device based on PI control, and relates to the technical field of gear-shift control. The method comprises the following steps that actual slip difference is obtained, and the difference value between the actual slip difference and the target slip difference is determined in the oil filling stage; the slip difference value is comparedwith the reasonable range of slip difference control, and according to comparing results, a PI control formula is used for calculating OG clutch oil pressure compensation; and according to the oil pressure compensation and oil pressure of a first OG clutch of the current gear, the oil pressure of a second OG clutch in the next gear is determined. According to the slip difference value, the PI control method is adopted to determine the OG clutch oil pressure compensation, the compensated oil pressure determined by the PI control method is further compensated and corrected instead of setting the OG clutch oil pressure compensation to be a fixed value, and therefore the OG clutch oil pressure can be more accurately controlled, and the second OG clutch oil pressure of the next gear can be rationally determined.

Description

technical field [0001] The invention relates to the technical field of shift control, in particular to an oil pressure self-adaptation method and device based on PI control. Background technique [0002] The clutch shifting process is mainly divided into three stages. In the oil pressure building stage, the OG clutch starts to drain oil, and the OC clutch starts to build up oil pressure from 0. In the torque phase phase, the OG clutch and the OC clutch realize torque exchange, and the OC clutch bears the torque previously borne by the OG clutch. In the gear shift phase, the turbine speed is adjusted according to the target gear, and then the gear shift is completed. [0003] The oil pressure build-up stage is the basis of the torque phase and the speed phase, so it is very important whether the oil pressure drop of the OG clutch is appropriate. If the drop of the OG clutch is too large, the OC clutch cannot bear the torque value brought about by the drop of the oil pressure...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a kind of oil pressure adaptive method and device based on PI control, to alleviate the OG clutch oil pressure that exists in the prior art due to the poor consistency of the gearbox hardware and the gearbox after wear and tear. The problem of large difference in required oil pressure in the establishment stage increases the coverage of the software

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