EXPERIMENTAL STUDY OF INDICATORS IN SMALL ENGINE FOR A COMPACT TRACTOR

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EXPERIMENTAL STUDY OF INDICATORS IN SMALL ENGINE FOR A COMPACT TRACTOR

Journal Title: Автомобильный транспорт - Year 2018, Vol 43, Issue

Abstract

Problem. Engine selection for a specific type of transport vehicle, configuration and refinement of mathematical models of processes, improvement of engine construction are made based on the results of experimental research. However, in technical litera-ture, and even the information resources of the man-ufacturers very limited information about the small engines can be found. In addition, the available data often contradicts each other. Goal of the arti-cle: experimental research of fuel efficiency and toxicity of exhaust gases of the small Briggs & Strat-ton Vanguard 18HP engine at different loads and speeds. Methodology. The engine performance pa-rameters were evaluated on the experimental set-up of the internal combustion engines department of National Technical University "Kharkiv Polytechnic Institute". Characteristics of the engine on the modes with speeds 1800, 2400, 3000, 3600 rpm and loads from idle to maximum were obtained. As a re-sult of experimental data processing volumetric effi-ciency and air/fuel ratios were determined. Total friction value of effective pressure was obtained by extrapolation the plot of fuel consumption versus brake output back to zero fuel consumption. Results. The impact of engine load and speed on the parame-ters of the fuel efficiency and emissions of the engine was analyzed. It is shown that the level of motoring losses in the small Briggs&Stratton Vanguard 18 HP engine corresponds to the motoring losses in gaso-line engines with greater volume and speed. The empirical equation for determining total friction value of effective pressure in the engine was pro-posed. It is shown that formula proposed by V.G.Dyachenko provides satisfactory accuracy of determining total friction value of effective pressure. Originality of work consists in the proposed empiri-cal dependence of total friction value of effective pressure on the engine speed for small engine. Рractical value is in the parameters of the small engine at operating speeds, the assessment of the applicability of the different empirical dependencies for evaluation of the motoring losses in the small engine.

Authors and Affiliations

O. O. Osetrov, O. M. Bekariuk, D. S. Alyokhin

Keywords

TO METHOD OF ANALYSIS AND CHOICE OF BRAKING FORCES DISTRIBUTION BETWEEN VEHICLE AXELS TAKING INTO ACCOUNT REGULATIONS REQUIREMENTS № 13 OF EEC OF UNO

The method of analysis and choice of braking forces distribution between the axels of category M1 vehicles in accordance with which the minimum permissible braking intensity is provided according to regulations requireme...

EP ID EP454186
DOI 10.30977/АТ.2219-8342.2018.43.0.18
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