Double-clutch torque exchange control system and control method

Abstract

The invention discloses a double-clutch torque exchange control system and control method. The control system comprises a driving / driven shaft judgment module, a clutch torque control module, a torque conversion module and a power source monitoring module. The control method comprises the steps of processing an input signal and judging a driving shaft and a driven shaft; obtaining a main clutch control torque; according to the rotating speed difference between a power source and the driven shaft, determining different correction grades for driving shaft torque correction; obtaining torque distribution data of the driven shaft; and executing the request torque. According to the rotating speed difference between the power source and the driven shaft, different correction levels to correct the torque of the driving shaft is determined, the rotating speed of the power shaft and the rotating speed of the clutch driven shaft is monitored, whether the rotating speed difference between the rotating speed of a power shaft and the rotating speed of the clutch driven shaft exceeds a set threshold value or not is judged, the torque correction of the driving shaft is calculated by adopting different formulas, and meanwhile, the driven shaft torque is equal to total clutch torque minus driving shaft torque. According to the method, the Tie-Up or engine rotating speed fluctuation condition can be avoided.

Description

technical field [0001] The invention belongs to the technical field of automotive power transmission systems, and in particular relates to a torque exchange control system and method for two clutches during multi-gear switching, which can avoid Tie-Up and engine speed fluctuations during multi-gear torque switching. Background technique [0002] The clutch is a key component of the automatic transmission of a vehicle. It combines smoothly, separates thoroughly, and transmits torque more reliably. The dual-clutch automatic transmission is connected to two input shafts through two clutches to transmit engine power. The electronic control unit controls the actions of the two clutches in different periods according to different driving intentions. When the vehicle is running normally, the output shaft gear of the combined clutch is engaged. It ensures that when the vehicle is shifting gears, there is always a group of clutches transmitting torque, and the vehicle will not expe...

AI Technical Summary

Problems solved by technology

If the torque of the power source increases or decreases rapidly due to the driver's accelerator or brake operation during this process, the torque of the driving shaft still rises with a fixed slope and cannot quickly respond to the change of the total torque, resulting in unreasonable torque distribution. The torque of the driven shaft increases too much or If the subtraction is too small, the driven shaft will change from static friction or micro-slip friction to dynamic friction, which will affect torque transmission and cause Tie-Up or engine speed fluctuations

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