Development of a Methodology for Bench Testing of Internal Combustion Engines

Abstract

AbstractThe relevance of the study is to reduce the number of real bench tests of internal combustion engines. The aim of the study is to develop a methodology for obtaining the main characteristics of an internal combustion engine during bench tests. The study used regression analysis. To test the developed methodology, bench tests of the internal combustion engine were carried out according to a multilevel two-factor second-order experiment plan. Bench tests were carried out on a load electric brake stand RAPIDO brand SAK N670 with a balancing pendulum machine with a power of 250 kW. As a result of the research, a methodology was developed for obtaining the main characteristics of an internal combustion engine during bench tests. As a result of approbation of this technique, equations of mathematical regression of the second order were obtained. The degree of reliability of the verification is determined to be 98.7% of the calculated dependences of the effective indicators of the internal combustion engine obtained according to the developed method, with the dependences obtained on the basis of traditional bench tests in accordance with GOST at various values of the average effective pressure and crankshaft speed equal to 98.7%. As a result of applying the developed methodology for bench testing of internal combustion engines, compared with the standard methodology described in GOST, it was possible to reduce the amount of experimental work by more than 3 times, which made it possible to reduce the complexity and cost of the study.KeywordsMethodologyBench testsExperiment planningMathematical modelsRegression equations