Experimental Study on the Method for T.D.C. Determination of a Medium Speed Marine Diesel Engine
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. Key words: Medium Speed Marine Diesel Engine, T.D.C, non-fired cylinder pressure curve, T.L.A. -thermodynamic loss angle.
Hui Zhang Feng Gu Lin Ren Xinrong Wu Minli Huang
Shanghai Marine Diesel Engine Research Institute,China
国际会议
上海
英文
1-6
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）