Investigation of Burn Parameters and Cyclic Variations of a Spark Ignition Engine With Different Combustion Chambers

Abdurrahman Demirci*, Hüseyin Emre Doǧan, Osman Akin Kutlar, Ömer Cihan, Hikmet Arslan

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4 Atıf (Scopus)

Özet

The tightening of the exhaust emission limits and the desire to reduce fuel consumption determine the direction of research on internal combustion engines. As it is known, the leaning of the mixture in spark ignition engines generally decreases fuel consumption and NOx emission together. Due to this fact, many researchers are focusing on lean combustion. The main purpose of this study is to compare the effect of different chamber geometries on combustion parameters of a spark ignition engine operated at lean and stoichiometric mixtures. One of the most important parameters of the combustion process is cyclic variations. It defines the stability of a spark ignition engine in operating conditions. Cyclic variations are increased with the leaning of the mixture in spark ignition engines. For lean mixture, a new combustion chamber was designed and manufactured for accelerating flow motions through its sickle and bowl shape. This chamber called MAN-Ricardo (MR) type decreased burn durations in the combustion process. While the start of the ignition for MR was later, the burn duration is shorter than that of the other two geometries. Therefore, MR type reduced the cyclic variations compared to other geometries in homogenous and lean mixtures. As a result, the combustion chamber must be designed to increase the turbulence intensity for a spark ignition engine to operate stably in lean mixtures, unlike the stoichiometric mixture.

Orijinal dilİngilizce
Makale numarası052301
DergiJournal of Energy Resources Technology
Hacim145
Basın numarası5
DOI'lar
Yayın durumuYayınlandı - 1 May 2023

Bibliyografik not

Publisher Copyright:
© 2022 by ASME.

Finansman

We would like to acknowledge the invaluable help of Professor Dr. Rafig MEHDİYEV for sharing his perfect ideas and advice. This study was supported by Scientific Research Project Department of Istanbul Technical University (Project No. 39596).

FinansörlerFinansör numarası
Istanbul Teknik Üniversitesi39596

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