Accelerator control method and system for automatic transmission vehicle drivability calibration test

Abstract

The invention discloses an accelerator control method and system for an automatic transmission vehicle drivability calibration test. The method comprises the following steps of judging whether an accelerator pedal is operated or not, whether a brake pedal is operated or not, whether a vehicle reaches a preset speed or not and whether an external switch is turned on or not; when any one condition that the accelerator pedal is operated, the brake pedal is operated, the vehicle reaches the preset vehicle speed, and the external switch is not turned on, is met, controlling the accelerator openingby controlling the accelerator pedal of the vehicle to control an accelerator opening mode, otherwise, receiving an accelerator opening instruction, converting the accelerator opening instruction intoan accelerator opening required value, and controlling the accelerator opening automatically according to the accelerator opening required value. By means of the accelerator control method and systemfor the automatic transmission vehicle drivability calibration test, the accelerator opening degree can be accurately controlled, the TCU whole vehicle calibration test during the actual driving process is achieved, meanwhile, the normal driving state can be automatically switched to, and the driving safety under complex road conditions is guaranteed.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a throttle control method and system for an automatic transmission vehicle drivability calibration test. Background technique [0002] Due to the consideration of cost, reliability and difficulty in technical realization, many pressure, torque, temperature and position sensors cannot be arranged in the vehicle or powertrain, making many key control systems unable to fully achieve closed-loop control. At present, the automatic transmission control unit Most of the control parameters used inside (ie TCU, Transmission Control Unit) need to be adjusted online by the calibration engineer according to the vehicle drivability target, that is, TCU vehicle calibration. [0003] In the process of TCU vehicle drivability calibration, it is usually necessary to perform a calibration test on the drivability of different throttle settings. At present, the driving conditions of different t...

AI Technical Summary

Problems solved by technology

However, neither of these two methods can be switched to the vehicle accelerator pedal to control the accelerator opening in real time according to the change of the driver's demand, so it can only be used for the accelerator opening control in the vehicle test verification on the bench

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