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The Effects of iso-propanol and n-heptane Fuel Blends on HCCI Combustion Characteristics and Engine Performance

Duygu İpci, Emre Yilmaz, Fatih Aksoy, Ahmet Uyumaz, Seyfi Polat, Hamit Solmaz, Gazi Üniversitesi, Tek Fak, Müh Otomotiv, Böl, Ankara Türkiye, Afyon Kocatepe (+13 others)
2015 Electronic Journal of Machine   unpublished

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In this study, the effects of iso-propanol fuel blends were investigated on HCCI combustion and engine performance. The variations of cylinder pressure, heat release rate, start of combustion and engine performance were studied in a single cylinder, four stroke, gasoline HCCI engine. The experiments were conducted at different inlet air temperatures at constant air excessive coefficient (λ=2) and engine speed (1500 rpm). The test results showed that cylinder pressure and heat release rate
more » ... d with the addition of iso-propanol in the test fuels. It was also found that the increase of inlet air temperature causes to advance the combustion. Iso-propanol has higher octane number compared to conventional fuels. However, calorific value of iso-propanol is lower than conventional fuels. The aim of this study is to research the usage of iso-propanol in HCCI engines. The experimental findings showed that the tendency of knocking combustion decreased with the increase of the amount of iso-propanol. The start of combustion was delayed with the increase of the amount of iso-propanol. In addition, combustion duration decreased with the addition of iso-propanol in HCCI combustion. As a result, knocking can be prevented using iso-propanol in HCCI engines. This effect also led to extend the HCCI operating range.
fatcat:dmclnsntwrcudloos7g222i4iy
Citation

Duygu İpci, Emre Yilmaz, Fatih Aksoy, Ahmet Uyumaz, Seyfi Polat, Hamit Solmaz, Gazi Üniversitesi, Tek Fak, Müh Otomotiv, Böl, Ankara Türkiye, Afyon Kocatepe, Üniversitesi Tek, Fak, Müh Otomotiv, Afyon Böl, Türkiye, Mehmet Akif, Ersoy Üniversitesi, Teknik Bilimler, Meslek Yüksekokulu, Burdur Türkiye, Hitit Üniversitesi, Meslek Yüksekokulu, Çorum Türkiye. "The Effects of iso-propanol and n-heptane Fuel Blends on HCCI Combustion Characteristics and Engine Performance." Electronic Journal of Machine (2015)