An engine throttle self-calibration system and control method

Abstract

The invention discloses an engine throttle self-calibration system and a control method, which include a throttle seat, a throttle shaft, a motor driving the throttle shaft to rotate, a throttle opening sensing pointer connected to the throttle shaft, and a throttle opening sensor pointer located in the throttle seat. The throttle door plate of the cavity, the throttle opening index plate set at the same circle center as the throttle opening sensor pointer, the throttle position sensor and the calibration control unit, wherein the throttle opening index plate sets the throttle opening from the throttle From fully closed valve to fully opened throttle valve, it is equally divided into n zones, and static contacts located on the same circle are respectively set on the corresponding scale points of each zone, and corresponding to the static contacts are set on the throttle opening sensor pointer. The moving contact, the calibration control unit controls the duty cycle of the PWM control signal of the throttle motor to change step by step, and automatically collects the duty cycle value of the PWM control signal and the throttle position voltage value when each static contact contacts with the moving contact. The invention has high calibration efficiency and is applicable to various application scenarios.

Description

technical field [0001] The invention relates to a throttle calibration system, in particular to an engine throttle self-calibration system and a control method. Background technique [0002] With technological progress and increasingly stringent emission regulations, piston engines have entered the era of electronic fuel injection, and throttle control is an important field of engine electronic control technology. [0003] During the working process of the EFI engine, it is necessary to collect the size of the throttle opening to calculate the air quality sucked into the engine, and calculate the optimal fuel injection amount based on this value to ensure that the air-fuel mixture ratio remains at the optimal value. [0004] Throttle valve control includes two aspects: throttle opening control and throttle opening position reporting; throttle opening control accuracy and throttle position sensor reported throttle position accuracy directly affect the air-fuel mixture ratio, ...

AI Technical Summary

Problems solved by technology

[0006] The existing throttle opening calibration technology is only to manually calibrate the PWM control signal duty cycle of the throttle opening in the engine development stage, and at the same time calibrate the corresponding relationship between the output voltage of the throttle position sensor and the throttle opening value. The efficiency is low, and it is unavoidable that the throttle control accuracy is not high due to the manufacturing tolerance of the throttle body and the throttle position sensor in the production process, which affects the stable operation of the engine, etc.

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