Electronic accelerator pedal characteristic self-learning method and automatic gearbox control unit

Abstract

The invention relates to an electronic accelerator pedal characteristic self-learning method and an automatic gearbox control unit, and solves the problem that an existing electronic accelerator pedalneeds to be calibrated and the empty stroke of an electronic acceleration pedal after calibration is too large to lead to driving danger. The method comprises: 1) a TCU reads a voltage signal of an electronic accelerator pedal for at least ns, and learning is started when the voltage value acquired by the TCU is greater than 0 degree of opening voltage value; 2) a key is powered down, if the TCUdoes not detect the power-down information within the ns, self-learning ends, and if the TCU detects the power-down information detected within the ns, the step 3) is executed; 3) the key is switchedto an ON gear, the pedal is stepped down, the pedal is loosened, and the voltage value is recorded; (4) whether the 2-fold relationship of the maximum voltage value or the minimum voltage value of the two-way analog voltage signals is established is judged; (5) the TCU stores the maximum voltage value and the minimum voltage value of the larger one of the two-way analog voltage signals; and (6) the pedal opening degree is calculated by utilizing the voltage value stored in the step 5).

Description

technical field [0001] The invention relates to the field of pure electric vehicle AMT, in particular to an electronic accelerator pedal characteristic self-learning method and an automatic transmission control unit. Background technique [0002] For a fixed electronic accelerator pedal, the minimum and maximum values ​​of the voltage (actual value) corresponding to the angle from 0% to 100% are fixed. The corresponding minimum and maximum voltage values ​​are also fixed. If the two voltage values ​​before and after (the actual value and the calibration value) do not match, it will cause driving problems. [0003] The electronic accelerator pedal is used to reflect the driving needs of the driver, and as one of the most important input signals of the TCU, it directly affects the output torque of the motor. However, at present, the models and performances of the pedals of various host manufacturers are different, and the one-to-one matching of the pedals with different chara...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing electronic accelerator pedal needs to be calibrated, and after calibration, the characteristics of the electronic accelerator pedal are changed due to uncertain factors such as temperature drift, resulting in excessive idle travel of the electronic accelerator pedal and the problem of driving danger. Accelerator pedal characteristic self-learning method and automatic transmission control unit