Operational assessment of selected gasoline and LPG vapour injector dosage regularity

Abstract

The paper analyzes the problem of injector dosage irregularity in classical and alternative fueling systems in motor vehicles. An adoption of a newly manufactured subassembly as a starting point for the research creates idealized engine operating conditions (new engines). The question of investigating used subassemblies is rather difficult but it provides a better and clearer picture of the existing situation - the exhaust emissions. The authors have undertaken the problem of fueling irregularity as a response to a growing number of vehicles with malfunctions of LPG fueling systems that are currently very popular in Poland. In the course of the analysis, several injectors were tested to present the differences in their dosage irregularity. To realize the research tasks, different test stands with software were designed. To fully visualize the problem, several sets of injecting units were selected at different stages of their wear. The results have shown that gasoline injectors are characterized by approx 0.5% irregularity and if heavily worn - 6%. LPG vapour injectors reached the level of 5% and heavily worn ones - 50%.

DOI: http://dx.doi.org/10.5755/j01.mech.20.5.7780