Injection timing strategy for exhaust heat recovery optimization on a turbocharged diesel engine

Autor: Punov, Plamen, Périlhon, Christelle, Lacour, Stephanie, Descombes, Georges, Podevin, Pierre, Evtimov, Teodossi
Přispěvatelé: Turbomachines, Moteurs, Departement of Combustion Engines, Automobiles and Transport, Technical University of Sofia [Bulgaria] (TU-Sofia), Laboratoire de Chimie moléculaire, génie des procédés chimiques et énergétiques (CMGPCE), Conservatoire National des Arts et Métiers [CNAM] (CNAM), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), University of Craiova Faculty of Mechanics
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: SMAT 2014 Science and Management of automotive and transportation engineering
SMAT 2014 Science and Management of automotive and transportation engineering, University of Craiova Faculty of Mechanics, Oct 2014, Craiova, Romania. pp.35--42
Popis: International audience; The paper presents a numerical analysis of injection timing effect on engine output power and heat rejected by exhaust gas in a turbocharged direct injection diesel engine implemented for a tractor application. The engine performance and exhaust gas enthalpy were studied by means of an engine computational model built in advanced simulation code AVL Boost. A Rankine-Hirn cycle model was developed due to estimate recovery potential of the exhaust gas. Injection timing optimization was carried out at the most commonly used engine operating points (n=1650rpm and variable load). The maximum engine output power was chosen as a target parameter to determine the optimal injection timing. A combination of Rankine-Hirn cycle using water as working fluid and injection timing optimization increased the maximum engine output power by 7.4%. The results revealed that in order to optimize overall engine efficiency in case of waste heat recovery system is applied it is necessary to reduce injection advance by 2deg to 5deg.
Databáze: OpenAIRE
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