Mapping of an HCCI engine using negative valve overlap strategy

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dc.contributor.authorPolat, Seyfi
dc.contributor.authorSolmaz, Hamit
dc.contributor.authorYılmaz, Emre
dc.contributor.authorCalam, Alper
dc.contributor.authorUyumaz, Ahmet
dc.contributor.authorYücesu, Hüseyin Serdar
dc.date.accessioned2019-05-13T09:04:35Z
dc.date.available2019-05-13T09:04:35Z
dc.date.issued2020
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Mekatronik Mühendisliği Bölümü
dc.description.abstractIn order to control combustion phasing and extend operation range of homogeneous charged compression ignition (HCCI) engines, several techniques such as controlling inlet air temperature and pressure, using alternative fuels, variable compression ratio, supercharging, etc. have been applied. Among them, variable valve mechanism received much attention to extend HCCI operating range and control autoignition. Mode switching between spark plug ignition (SI) to HCCI has been started to use widely because of limited operation range of the HCCI mode. To control of an engine switching combustion modes between SI and HCCI, embedded system needs parametrical control maps of the engine. In this study, operation range, air excess ratio, torque and thermal efficiency maps of an HCCI engine using negative valve overlap (NVO) strategy were obtained and additionally the effects of NVO on HCCI combustion in view of in-cylinder temperature, heat release rate, effective thermal efficiency, combustion phasing, and exhaust emissions were investigated. Also, variation of CO, HC, and NOx emissions were evaluated at different valve overlaps. Three different valve overlap including +8, ?8, and ?16 CA were used in the experiments. Test results showed that in-cylinder pressure and heat release decreased with NVO. The test engine could run without knocking by application of NVO. It was seen that operating range of HCCI extended with NVO. It was also found that effective thermal efficiency increased with ?16ºCA valve overlap compared to other valve timings.
dc.identifier.citationPolat, S., Solmaz, H., Yılmaz, E., Calam, A., Uyumaz, A., Yücesu, H. S. (2019). Mapping of an HCCI engine using negative valve overlap strategy. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 1-15.
dc.identifier.doi10.1080/15567036.2019.1602224
dc.identifier.issn1556-7036
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1080/15567036.2019.1602224
dc.identifier.urihttps://hdl.handle.net/11491/1611
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor and Francis Inc.
dc.relation.ispartofEnergy Sources, Part A: Recovery, Utilization and Environmental Effects
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectExhaust Emissionen_US
dc.subjectHCCI Combustionen_US
dc.subjectHCCI Mappingen_US
dc.subjectNegative Valve Overlap (NVO)en_US
dc.subjectPerformanceen_US
dc.subjectValve Timingen_US
dc.titleMapping of an HCCI engine using negative valve overlap strategy
dc.typeArticle

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