The tuning of a small four-stroke spark ignition engine for flexible valve timings through numerical approach

Mohd Razali, Hanipah and M. Haziq Adham, Rosli and M., Kettner (2019) The tuning of a small four-stroke spark ignition engine for flexible valve timings through numerical approach. In: Engineering Applications of Artificial Intelligence Conference 2018 , 3-5 December 2018 , Sutera Harbour Resort, Sabah, Malaysia. pp. 1-10., 255. ISSN 2261-236X

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DOI/Official URL: https://doi.org/10.1051/matecconf/201925504004

Abstract

Variable valve timing has been implemented by various manufacturers to improve internal combustion engine performance while operating at wide speed and load ranges. A novel flexible valve timing system for a small four-stroke engine is currently under development by Automotive Engineering Research Group (AERG) in Universiti Malaysia Pahang (UMP). In this paper, a compherenhensive intake and exhaust tuning for th flexible variable valve timing is presented. A numerical assessment has been conducted to the engine in a one dimensional engine simulation using validated simulation model. There are eight valve timing configurations investigated for the tuning for three speed regions. The simulation shows a positive and significant impact to the engine performance in three approaches; namely late intake valve closing, early intake valve closing and late exhaust valve closing. These approaches sufficiently covered the whole range of engine speeds.

Item Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	Four-stroke; Flexible valve; Performance
Subjects:	T Technology > TJ Mechanical engineering and machinery
Faculty/Division:	Centre of Excellence: Automotive Engineering Centre Centre of Excellence: Automotive Engineering Centre Faculty of Mechanical and Automotive Engineering Technology
Depositing User:	Pn. Hazlinda Abd Rahman
Date Deposited:	12 Feb 2019 07:45
Last Modified:	30 Jun 2020 02:36
URI:	http://umpir.ump.edu.my/id/eprint/24108
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