Wet-type double-clutch slipping friction limiting condition and cooling flow demand analysis method

Abstract

The invention provides a wet-type double-clutch slipping friction limiting condition and cooling flow demand analysis method. The method comprises steps: determining vehicle and speed changer information and vehicle working condition positioning information; classifying wet-type double-clutch slipping friction limiting conditions, determining throttle opening under each kind of slipping friction limiting condition; according to wet-type double-clutch physical information and speed changer information, and vehicle working condition positioning information, establishing a vehicle longitudinal dynamics travel model; inputting input information corresponding to different slipping friction limiting conditions in the vehicle longitudinal dynamics travel model, to obtain clutch friction plate surface temperature and clutch cutting oil outlet oil temperature under different slipping friction limiting conditions; according to the clutch friction plate surface temperature and the clutch cuttingoil outlet oil temperature, determining coolant oil amount of lubricating cooling oil required under different slipping friction limiting conditions. The method is low in simulation cost, and fast inspeed.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a wet dual-clutch sliding friction limit working condition and a cooling flow demand analysis method. Background technique [0002] As one of the core components of the automobile transmission system, the clutch is connected between the engine and the transmission in the transmission system. Under running conditions, with appropriate gears, power transmission efficiency and fuel economy can be improved. The dual-clutch automatic transmission contains two clutches to control the odd and even gears respectively. The odd and even clutches work alternately to reduce the impact caused by power interruption and improve the smoothness and comfort of shifting. From the different contact forms and cooling methods on the surface of the dual clutch, it is divided into a dry dual clutch and a wet dual clutch. The dry dual clutch mainly cools the heat generated during the clutch friction process t...

AI Technical Summary

Problems solved by technology

[0003] Under extremely harsh working conditions, such as when starting on a slope, the wet dual clutch will generate a large amount of frictional heat due to the sliding friction of the friction plate. If the lubrication and cooling flow is insufficient and the frictional heat cannot be taken away in time, the friction surface of the clutch will overheat and stay in an overheated state for a long time It will cause the surface of the friction material of the clutch to be burned and the function will fail, which will greatly affect the driving safety.

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