JUSTIFICATION OF THE DESIGN SCHEME OF AN ELECTRONIC TACHOMETER FOR A DIESEL ENGINE

Abstract

The object of the study is diesel engine monitoring systems, crankshaft rotational speed, and an electronic tachometer.
The problem addressed was to determine technical and technological solutions that improve the efficiency of diesel operation
by justifying the design scheme of an electronic tachometer. Based on the research results, the design and operating principle
of an experimental electronic tachometer for a diesel engine were substantiated. The tachometer was developed on the basis of
the Arduino Uno R3 microcontroller, Hall effect sensor SS49E, and 1602 LCD module. The device is proposed as a
complementary component of an experimental electronic fuel supply control system for a diesel engine equipped with a
distributor-type fuel injection pump ND-21.
A linear relationship was established between the readings of the developed electronic tachometer and the mechanical
tachometer model TCh10-R (DSTU EN60051-2:2017), with a root mean square deviation of ±4.8 rpm. The discrepancy between
the analog and digital tachometer readings did not exceed 2.5% over the entire measurement range (up to 1000 rpm). The
electronic tachometer demonstrated a fast response time (~150 ms), which made it possible to track even short-term changes in
rotational speed.