Investigation of the Effects of Intake Manifold Pressure on Performance and Combustion Characteristics in an HCCI Engine

Year 2022, Volume: 37 Issue: 4, 1735 - 1750, 28.02.2022

Hamit Solmaz , Alper Calam , Serdar Halis , Duygu İpci , Emre Yılmaz

https://doi.org/10.17341/gazimmfd.602742

Cited By: 1

Abstract

Homogeneous charge compression
ignition (HCCI) engines have significant advantages over spark ignition (SI)
and compression ignition (CI) engines due to their high thermal efficiency and
low NOx emissions. However, it is difficult to control the start of combustion.
In this study, the effects of the intake manifold pressure on HCCI combustion
were investigated experimentally at 373 K intake temperature in a four
cylinders HCCI engine, which was transformed from the SI engine. It was
observed that there was an advance in the start of combustion as the manifold
pressure increased. It was also observed that the change in octane number had
significant effects on the start of combustion. The highest thermal efficiency
was recorded as 46.38% at 120 kPa manifold pressure using RON40 fuel. The
increase in the volumetric efficiency that depends on the increase in manifold
pressure provided an increase in maximum cylinder pressure and heat release.

Keywords

HCCI, low temperature combustion (LTC), combustion, engine performance

HCCI bir motorda emme manifoldu basıncının performans ve yanma karakteristiklerine etkilerinin incelenmesi

Abstract

Homojen dolgulu sıkıştırma ile
ateşlemeli (HCCI) motorların yüksek termik
verimleri ve düşük NO_x emisyonları sebebiyle buji ile ateşlemeli
(SI) ve sıkıştırma ile ateşlemeli (CI) motorlara göre önemli üstünlükleri
bulunmaktadır. Ancak HCCI motorlarda yanma başlangıcının kontrol edilmesi
oldukça zordur. Bu çalışmada, dört silindirli SI motordan dönüştürülmüş olan
bir HCCI motoru kullanılmıştır. 373 K hava giriş sıcaklığı için, emme manifold
basıncının HCCI yanma üzerine etkileri deneysel olarak incelenmiştir. Deney
yakıtı olarak RON0, RON20 ve RON40 kullanılmıştır. Manifold basıncının
artmasıyla yanma başlangıcının avansa alındığı gözlenmiştir. Ayrıca oktan
sayısının değişiminin de yanma başlangıcı üzerine önemli etkileri olduğu
gözlenmiştir. En yüksek indike termik verim RON40 yakıtı kullanımında, 120 kPa
manifold basıncında %46,38 olarak kaydedilmiştir. Manifold basıncının
artırılmasına bağlı olarak volümetrik verimin de artması maksimum silindir içi
basınç ve ısı yayılımında artış sağlamıştır.

Keywords

HCCI, düşük sıcaklıkta yanma, yanma, motor performansı

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