Application of physical patterns when elaborating a control system algorithm for an internal combustion engine

Abstract

Annotation. Introduction. An electrically driven throttle unit is used in modern internal combustion engines (ICE) with quantitative control. The throttle unit makes it possible not only regulate the amount of incoming air, but also measure the parameters of the air passed through the throttle unit.

The purpose of the study was to develop an algorithm for the ICE control system.

Methodology and research methods. The ICE control systems algorithms were based on the application of physical patterns.

Scientific novelty and results. To work out the needed algorithm high-precision models were used, in particular, a model that took into account the leakage of the simulated throttle unit caused by the gaps necessary for the normal throttle unit operation. To determine the amount of air passed through the throttle unit with the help of the ICE control system, it was proposed to use the model considering the area of the slot formed due to the inequality of the linear size of the throttle valve small axis and the inner diameter of the throttle channel. In case the area of the slot in the model is not considered it can lead to a significant error, especially when the absolute angle of the throttle position is less than 30 degrees. The existing model of the throttle unit passage area was taken into account and a more accurate model of the throttle unit passage slot area was proposed. The results of calculating the relative error and the amount of the passed through the throttle unit air for the models under consideration were presented.

Practical significance. The developed recommendations can be used in the elaboration of software algorithms for the electronic control unit of the internal combustion engine control system.