TITLE: Comparative performance analysis of an OTTO engine equipped for petrol or liquefied petroleum gas propulsion
AUTHORS: Miroslav Pavlović, Zdravko B. Nunić
ABSTRACT: Today, in the development of engines for the propulsion of motor vehicles, the greatest importance is given to the environmental aspect in terms of finding the ideal fuel. In solving this problem, it can be said with certainty that liquefied petroleum gas (LPG) has emerged as an ideal alternative fuel because it is more environmentally friendly and currently available in sufficient quantities. After showing the basic physical and chemical characteristics of LPG, the elements that must be installed in a vehicle that uses this type of fuel are listed. The paper analyzes the performance of OTTO engines with a subsequently installed LPG system in one group of vehicles that consisted of vehicles of the same manufacturer and type of engine. Using a chassis dynamometer in the laboratory power measurements were performed. The basic technical characteristics of the measuring equipment used in the laboratory are also stated. Based on the obtained measurements, the results of the operation of the engine on both fuels, as well as their mutual comparison are given. Considering that quite good results of testing the power of LPG aggregates were obtained in the following research, the parameter of the ratio of consumption of this fuel in relation to gasoline should be investigated for economic reasons.
KEYWORDS: OTTO aggregate, Chassis dynamometer, LPG, Engine power