Low-temperature self-study method of automatic gearbox and automatic gearbox

Abstract

The invention relates to a low-temperature self-study method of an automatic gearbox and the automatic gearbox. According to the low-temperature self-study method of the automatic gearbox, a fast adaptive function of the automatic gearbox at low temperature is added and is only triggered for one time during the whole life cycle of the automatic gearbox; the function is triggered by two conditions:(1) the oil temperature in the automatic gearbox is lower than 60 DEG C, and (2) the automatic gearbox is not subjected to an adaptive program at the normal oil temperature interval ranging from 60 DEG C to 105 DEG C, so that after a finished automobile is started at low temperature for the first time, a low-temperature self-study function of an electronic control unit in the automatic gearbox istriggered at the time; after the low-temperature self-study function is carried out for 5 times, the program can be forced to quit, so that the gear shifting quality of the automobile is favorable, and the automatic gearbox has no need to self-adapt; and meanwhile, automatic study data is stored in a storage unit of the automatic gearbox, so that the stored automatic study data can be automatically retrieved for later low-temperature gear shifting in the automobile market.

Description

technical field [0001] The invention relates, in particular, to a low-temperature self-learning method for an automatic transmission and the automatic transmission. Background technique [0002] Due to the tolerance of parts and assembly precision of automatic transmissions, the performance of each automatic transmission on the whole vehicle will be different. Most automatic transmissions have good shift quality, but a small number of them perform slightly worse; and As the mileage increases, the automatic transmission will have a run-in and wear phase, and the shift quality will decline. In order to ensure the difference in shifting quality due to differences in automatic transmission hardware and driving wear, an adaptive function is added to the existing automatic transmission to ensure that the shifting quality of the automatic transmission is good throughout its life cycle. [0003] At present, the adaptive function set by the automatic transmission is only carried out...

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Problems solved by technology

[0004] In order to improve the deficiencies of the prior art, the object of the present invention is to provide a method for automatic transmission low-temperature self-learning and automatic transmission, to solve the problem existing in the prior art after the automatic transmission is installed in the vehicle factory. The oil temperature does not reach 60°C, only around 30°C, and the self-adaptive function cannot be performed. As a result, after the vehicle is sent to the market, when the customer performs the first low-temperature shift, the quality is poor, resulting in a technical problem of poor customer experience.

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