Title: Development of combustion instability and noise during starting of a truck turbocharged diesel engine

Authors: Evangelos G. Giakoumis; Athanasios M. Dimaratos

Addresses: Internal Combustion Engines Laboratory, Thermal Engineering Department, School of Mechanical Engineering, National Technical University of Athens, 9 Heroon Polytechniou St., Zografou Campus, Athens 15780, Greece ' Internal Combustion Engines Laboratory, Thermal Engineering Department, School of Mechanical Engineering, National Technical University of Athens, 9 Heroon Polytechniou St., Zografou Campus, Athens 15780, Greece

Abstract: In the current study, experimental tests were conducted on a truck turbocharged diesel engine to investigate the mechanisms of combustion noise radiation and combustion instability during various starting schedules experienced in daily driving conditions, namely under cold and hot operations. To this aim, a fully instrumented test bed was set up to capture the development of key engine and turbocharger properties. Analytical diagrams are provided to explain the behaviour of combustion instability and noise radiation in conjunction with all relevant parameters, such as cylinder pressure and pressure spectrum, turbocharger and governor/fuel pump response.

Keywords: truck engines; turbocharged diesel engines; vehicle starting; combustion instability; combustion noise; cylinder pressure spectrum; heavy vehicles; noise radiation; vehicle noise.

DOI: 10.1504/IJVD.2012.048978

International Journal of Vehicle Design, 2012 Vol.59 No.4, pp.272 - 288

Received: 30 Apr 2011
Accepted: 20 Jul 2011
Published online: 23 Apr 2013 *

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