Torque control method for manual transmission automobile starting

Abstract

The invention relates to an automobile engine, in particular to a torque control method for manual transmission automobile starting. ECU collects a running speed signal and a clutch displacement signal and enables an automobile to enter a starting mode or exit the starting mode; if the automobile is in the starting mode, the ECU limits a maximum torque of an engine according to a rotation speed ofthe engine and an opening situation of an accelerator; corresponding triggering rotation speeds and limiting rotation speeds are correspondingly set for different accelerator openings; if the rotation speed of the engine is less than the triggering rotation speed, the maximum torque of the engine is not limited; if the rotation speed of the engine is equal to the limiting rotation speed, the maximum torque of the engine is 0; and if the rotation speed of the engine is between the triggering rotation speed and the limiting rotation speed, the maximum torque of the engine changes in a linear manner. According to the torque control method for manual transmission automobile starting, the rotation speed of the engine is prevented from rising to an over-high value, the slipping frictional powerof the starting process is reduced, and the matching process between the engine and the clutch is more stable.

Description

technical field [0001] The invention relates to an automobile engine, in particular to a torque control method for starting a manual transmission automobile. Background technique [0002] Starting performance is an important performance of vehicle performance. Good starting performance can improve the customer's driving experience of the car and increase the joy of using the vehicle. On the contrary, poor starting performance will cause the vehicle to stall easily and increase customer complaints about the use of the vehicle. Therefore, the optimization of starting performance is an extremely important part of the vehicle development process. At present, the adjustment of the starting performance is realized through the torque control at the starting time, that is, the torque at the starting time is controlled by the ECU to prevent the engine from stalling due to insufficient torque. Through the control of the ECU, even if the opening of the accelerator pedal does not chan...

AI Technical Summary

Problems solved by technology

[0003] During the starting process, if the clutch pedal is released too slowly, the speed will rise too high (that is, the engine speed will gradually increase to an excessively high value), and the wheels will slip. risk; if the clutch is released too quickly, the engine speed will be too low after the clutch is engaged, and it will not be able to start normally, and the vehicle will rush forward

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