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A Short Review on Factors that Impact the Backpressure of exhaust manifold of spark ignition engine


Muhammad Izzat Nor Ma’arof1*, Rishan Murali2, Lim Jin Wei1, Mohd Amir Shazwan Hashim1, Girma Tadesse Chala3, Chai Chuan Ern1


1Faculty of Engineering and Quantity Surveying (FEQS), INTI International University, Persiaran Perdana BBN, Putra Nilai, 71800 Nilai, Negeri Sembilan Darul Khusus, Malaysia

2Motorsport Technology Research Unit and UniMAP Racing Circuit (MoTECH), Universiti Malaysia Perlis (UniMAP) Pauh Putra Campus 02600 Arau, Perlis Indera Kayangan

            3 International College of Engineering and Management, P.O. Box 2511, C.P.O Seeb 111, Muscat, Oman 


Correspondence author : muhammadIzzat.maarof@newinti.edu.my

AbstractExhaust manifold serves as breathing equipment for internal combustion (IC) engine removing combustion products. Backpressure or pressure drop in exhaust manifold is one of the flow characteristic that gives various effect to IC engine. Current methods of estimating the backpressure are through computational fluid dynamic (CFD) analysis and experimental analysis. The effects of backpressure on spark ignition (SI) and compression ignition (CI) engine are usually severe which includes pumping loss, reduced thermal efficiency, increased brake specific fuel consumption (bsfc) and reduced brake power. This paper reviews the Various design parameters that cause backpressure in exhaust manifold such as diameter, shape, length and pipe bend.

KeywordsExhaust manifold, Backpressure, Pressure drop, Internal combustion engine