Measuring and simulating EGR-distribution on a HD-diesel engine
(English)In: SAE technical paper series, ISSN 0148-7191Article in journal (Other academic) Submitted
The distribution of EGR between the cylinders of an internalcombustion engine has been shown to have large impact onthe engine emissions. Especially at high EGR, the combustionreacts sensibly to variations in the EGR-rate. A cylinder thatreceives excessive EGR produces soot particles while acylinder with too little EGR has increased NOX-emission. It istherefore important to have knowledge about the mixing in anengine.This study compares two different EGR-mixing measurementmethods. The first is based on CO2 measurement withstandard probes, placed at 36 different locations in the engine.The second method uses a laser beam and a detector to gaininformation about the mixing with a high time-resolution.Additionally, 1-D simulations are used to gain informationabout the mixing process.To vary the mixing process on the engine, two differentair/EGR mixers are used and their mixing performance isevaluated.
EGR, mixing, distribution measurement
IdentifiersURN: urn:nbn:se:kth:diva-140849OAI: oai:DiVA.org:kth-140849DiVA: diva2:692862
SAE PFL 2014
QS 20142014-02-022014-02-022014-02-03Bibliographically approved