Accelerator pedal minimum position self-learning method and system and vehicle

Abstract

The invention provides an accelerator pedal minimum position self-learning method and system and a vehicle. The accelerator pedal minimum position self-learning method comprises the following steps ofobtaining a minimum position value during power-on and a minimum position value during power-off in a cycle when the vehicle is powered on; obtaining a voltage value corresponding an accelerator pedal opening in the current cycle; comparing the voltage value with a calibration threshold; and if the voltage value is less than or equal to the calibration threshold, carrying out self-learning according to a mean value of the voltage value; and if self-learning is failed, selecting a default value, the minimum position value during power-on or the minimum position value during power-off to perform self-learning according to a relation between the voltage value and the minimum position value during power-on and a relation between the voltage value and the minimum position value during power-off. According to the accelerator pedal minimum position self-learning method, the accuracy of calculation values of the accelerator pedal minimum position under various situations is guaranteed, the accuracy of the calculation of the accelerator pedal opening is guaranteed, the vehicle torque output accuracy is improved, and the running of the vehicle is made much safer.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a self-learning method, system and vehicle for the minimum position of an accelerator pedal. Background technique [0002] As for the safety of the accelerator pedal function of a car, in general, for a traditional car, in order to ensure the accuracy of the calculation of the accelerator pedal opening torque, it is indirectly realized through the self-learning function of the minimum position of the throttle, that is to say, the traditional car does not There is no straightforward algorithm to guarantee the safety of the accelerator pedal function. At the same time, for pure electric vehicles, due to imperfect regulations and insufficient experience accumulated by OEMs, the design of many pure electric vehicles is insufficient to consider the functional safety of the accelerator pedal. However, there is no throttle assembly in pure electric vehicles, which requires consider...

AI Technical Summary

Problems solved by technology

At this time, using a fixed value to calculate the opening of the accelerator pedal will lead to a deviation in the calculation of the opening value, resulting in a deviation in the torque output by the vehicle, which will affect the safe driving of the vehicle.

In addition, if the accelerator pedal is stuck (at this time, the minimum mechanical position where the accelerator pedal can rebound is no longer the minimum position originally defined), the accelerator pedal opening value will be calculated according to the original minimum value. , which will lead to an unexpected increase in the calculation value of the opening, which will affect the output of the vehicle torque

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