【作者】

Hui Zhang，Feng Gu，Lin Ren

【摘要】

论文已在中国上海举行的2013年CIMAC大会上发表。论文的版权归CIMAC所有。 It is very important to identify the T.D.C.phase in the combusting analysis of I.C. engine. Erroneous determination of T.D.C. has been recognized as the major error source for thermodynamic cycle calculations, such as mean indicated pressure, heat release curves and so on. The methods of T.D.C. determination in the indicator diagram of the medium speed marine diesel engine is studied in this paper. Analyzing results indicate that T.D.C. can be determined by detecting the piston displacement directly with an electric-capacity or microwave transducer. This method is more accurate but more additional cost and mounting problem. To use non-fired cylinder pressure maximum point adds T.L.A thermodynamic loss angle is more applicable for the medium speed marine diesel engine. And the key problem of the later method is T.L.A. determination. In this paper, the effect factors of T.L.A. are analyzed. An ideal polytropic exponent curve are introduced and compared with the real polytropic exponent curve to estimate T.L.A and the program is compiled. T.L.A. of a certain diesel engine is calculated and its T.D.C. phase is identified.Comparing the calculated T.L.A. with the tested T.L.A. in experiments, which proves that this method is feasible and the result is correct. It supplies a gap about the study of the T.D.C determination for the medium speed marine diesel engine.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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