Research on Compression Ratio and Fuel Injection Advance Angle Optimization of Two-stage Turbocharged Diesel Engine

doi:10.3969/j.issn.1000-1093.2017.01.003

Abstract

Abstract: To address the issue that the maximum combustion pressure is too high after a certain V shape diesel engine is modified into two-stage turbocharged system from one-stage turbocharged system, the effects of fuel injection advance angle and compression ratio on the performance and maximum combustion pressure of two-stage turbocharged diesel engine are simulated by building a simulation model on the software GT-Power and using experimental data, and the united optimization of both the fuel injection advance angle and compression ratio is conducted with the tool DOE of GT-Power by taking experimental maximum combustion pressure of the two-stage turbocharged engines as limitation and taking the maximum torque as goal. The decrease of the compression ratio can effectively reduces the maximum combustion pressure at 1 300 rpm and 2 100 rpm. For every 1 decreased in the compression ratio, the maximum combustion pressure is decreased by 0.8 MPa at 1 300 rpm and 1.16 MPa at 2 100 rpm, respectively. Relative variations of optimized compression ratio and fuel injection advance angle are 14.9°CA and 4.3°CA, respectively. The feasibility of the result is validated according to the structural condition of the testing diesel engine. Verification with trial machine is conducted on diesel engine bench. Key

Key words: powermachineryengineering, two-stageturbochargeddieselengine, compressionratio, fuelinjectionadvanceangle, maximumcombustionpressure, powerperformance

CLC Number:

TK421⁺.23

SHANG Hai-kun , DONG Chang-long， HE Jian-feng， FAN Feng， LI Ping， HUANG Mian-dun， XIE Liang. Research on Compression Ratio and Fuel Injection Advance Angle Optimization of Two-stage Turbocharged Diesel Engine[J]. Acta Armamentarii, 2017, 38(1): 20-26.

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第38卷
第1期2017 年1月兵工学报ACTA
ARMAMENTARIIVol.38No.1Jan.2017

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