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Experimental investigations of variable valve trains in combination with a second opening of an exhaust valve in partial load operation of a passenger car single-cylinder diesel engine

Maniatis, Panagiotis; Wagner, Uwe ORCID iD icon; Koch, Thomas

Abstract (englisch):

A manipulation of the charge exchange allows controlling the amount of residual gas during
engine warm-up. The residual gas during the warm-up phase leads to an increase of the exhaust gas
temperature and supports to reach the exhaust aftertreatment system operating temperature faster. In
addition, the warm residual gas increases the combustion chamber temperature, which reduces the
HC and CO emissions. However, fuel consumption increases. For that reason, such heating measures
should be the best compromise of both, exhaust gas temperature increase and engine efficiency in
order to provide efficient heating strategies for passenger car diesel engines.
With the aim to determine efficient heating measures for passenger car diesel engines by a valve train
manipulation, simulative and experimental investigations are carried out as part of a research project
at the Institute of Internal Combustion Engines of the Karlsruhe Institute of Technology to establish a
reliable cam design methodology.
For the experimental investigations a modern research single-cylinder diesel engine was set up on a
test bench. Additionally, a 1-D simulation model of the experimental setup was created in order to
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Zugehörige Institution(en) am KIT Institut für Kolbenmaschinen (IFKM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2018
Sprache Englisch
Identifikator KITopen-ID: 1000086294
Erschienen in Thiesel 2018 - Thermo and fluid dynamic processes in direct injection engines, Valencia, Spain, 11th-14th September 2018
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