THE INFLUENCE OF THE IGNITION SYSTEM CHARACTERISTIC ON THE TWO-STROKE ENGINE OPERATING CONDITIONS

Łukasz Fiedkiewicz; Wojciech Cieślik; Ireneusz Pielecha

Łukasz Fiedkiewicz Poznan University of Technology, Faculty of Machines and Transport
Wojciech Cieślik Poznan University of Technology, Faculty of Machines and Transport
Ireneusz Pielecha Poznan University of Technology, Faculty of Machines and Transport http://orcid.org/0000-0001-7340-635X

Keywords: two-stroke engine, ignition system, combustion, thermodynamic analysis

Abstract

This paper presents an indicator analysis of the impact of the characteristics of an electronic ignition system on the operating conditions of a two-stroke spark ignition engine. The tests were carried out on a single-cylinder two-stroke engine equipped with a combustion pressure sensor using the apparatus for recording fast-varying signals. The influence of changes of the ignition angle of advance at constant engine speeds on the engine operating indicators was analysed. The assessment of the impact of the changes to the settings of the ignition system was analysed in terms of thermodynamic conditions: combustion pressure and average effective pressure. It was found that the ignition angle of advance has positive influence on engine operating conditions and uniformity of engine operation. As a measure of non-uniformity of engine operation were accepted the coefficient of variation of the engine speed and the mean indicated pressure. It was indicated that, along with the ignition angle of advance, the indicators of two-stroke engine operation also increase with simultaneous increase in the non-uniformity of engine operation.

Keywords:
two-stroke engine, ignition system, combustion, thermodynamic analysis