Researching and evaluating some new methods to measure engine speed

Abstract

The article presents the relationship between engine speed and signals which are obtained from sensors and system of engine. Specifically, Researchers are only interested three signals:  the signal of MAP sensor, signal from camshaft position sensor and the battery voltage when the engine is operating. Based on these signals, engine speed has been calculated. Comparison of accuracy and ability to apply each method is used to definate from these signals. To solve this problem, the researcher used electronic circuits to convert the original signal into pulse signal and then send it to the microcontroller. Microcontroller will calculate and display results on LCD. The end, the researcher manufactured the measuring equipment based on three signals: signal of the MAP sensor, signal camshaft position sensor, battery voltage signal. Experimental results show that this equipment measures with small error.