Clutch control method for upshifting from first gear to second gear during start-up of dual-clutch transmission

Abstract

The invention discloses a clutch control method for the first gear up to the second gear during the starting process of a dual-clutch transmission, comprising the following steps: S1, an algorithm module receives an input signal; S2, the algorithm module calculates an engine target speed according to the obtained input signal; S3 , the algorithm module takes the engine target speed as the target, and calculates the clutch target total torque; S4, the control calculation of the clutch switching preparation stage; S5, the clutch switching torque stage control calculation; S6, the clutch switching speed stage control calculation; S7 , the complete state calculation of the clutch switching. The present invention has the advantage of being able to respond quickly to shift demands.

Description

technical field [0001] The invention relates to the field of automobile transmissions, in particular to a clutch control method for shifting from first gear to second gear during the starting process of a dual-clutch transmission. Background technique [0002] Due to the requirements of the power characteristics of the vehicle, generally the speed ratio difference between the first gear and the second gear is relatively large. When the vehicle starts in the first gear, the engine speed is relatively high, and the transmission efficiency of the transmission is relatively low. , if the first gear start is completed, and then the power-up to the second gear is performed, it will lead to a longer use of the first gear and a higher engine speed, which will affect the drivability and fuel economy of the vehicle. When starting, the power up to the second gear can only be performed after the first gear is completed, because if the power up to the second gear is performed before the ...

AI Technical Summary

Problems solved by technology

[0002] Due to the requirements of the power characteristics of the vehicle, generally the speed ratio difference between the first gear and the second gear is relatively large. When the vehicle starts in the first gear, the engine speed is relatively high, and the transmission efficiency of the transmission is relatively low. , if the first gear start is completed, and then the power-up to the second gear is performed, it will lead to a longer use of the first gear and a higher engine speed, which will affect the drivability and fuel economy of the vehicle. When starting, the power up to the second gear can only be performed after the first gear is completed, because if the power up to the second gear is performed before the first gear is started, the power will be interrupted during the starting process, and the starting performance will be poor, which will lead to driving. staff complaints

Images