Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement

Modern passenger car engines have been “down-sized” for improved fuel consumption, resulting in high speeds to obtain good performance. Consumers, however, are demanding improved low-end torque for improved drivability. The target engine; a 4 valve per cylinder, 1.6L engine with two intake cam pr...

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Main Author:	Khoo, Aik Soon
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TJ1-1570 Mechanical engineering and machinery
Online Access:	http://eprints.usm.my/37250/1/KHOO_AIK_SOON_24_Pages.pdf
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id	my-usm-ep.37250
record_format	uketd_dc
spelling	my-usm-ep.372502019-04-12T05:26:04Z Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement 2014 Khoo, Aik Soon TJ1-1570 Mechanical engineering and machinery Modern passenger car engines have been “down-sized” for improved fuel consumption, resulting in high speeds to obtain good performance. Consumers, however, are demanding improved low-end torque for improved drivability. The target engine; a 4 valve per cylinder, 1.6L engine with two intake cam profiles and 2 intake runner lengths, was modeled and correlated with measured engine performance characteristics (power, torque, etc.); and pressure traces from combustion chamber, intake and exhaust manifolds to establish the confidence level in the model's prediction. The model was then optimised for low-end torque by manipulating exhaust manifold configuration, exhaust runner length, intake diameter and intake runner length. It was found that the original exhaust system is too short and gives uneven exhaust cross-charging among the cylinders. Simulation result indicated that a 2.7-5.6% improvement in torque could be realised with an evenly cross-charged and longer exhaust runner. A 2% torque improvement was predicted by changing the intake manifold geometry to smaller diameter. The target engine was subsequently modified with new set of exhaust manifold and intake runner. Result showed a torque improvement of 2.7-4.5% at lower engine speed over the base design by exhaust tuning. Effect of intake tuning was not significant but it showed a similar trend as indicated by simulation. 2014 Thesis http://eprints.usm.my/37250/ http://eprints.usm.my/37250/1/KHOO_AIK_SOON_24_Pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Mekanik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TJ1-1570 Mechanical engineering and machinery
spellingShingle	TJ1-1570 Mechanical engineering and machinery Khoo, Aik Soon Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement
description	Modern passenger car engines have been “down-sized” for improved fuel consumption, resulting in high speeds to obtain good performance. Consumers, however, are demanding improved low-end torque for improved drivability. The target engine; a 4 valve per cylinder, 1.6L engine with two intake cam profiles and 2 intake runner lengths, was modeled and correlated with measured engine performance characteristics (power, torque, etc.); and pressure traces from combustion chamber, intake and exhaust manifolds to establish the confidence level in the model's prediction. The model was then optimised for low-end torque by manipulating exhaust manifold configuration, exhaust runner length, intake diameter and intake runner length. It was found that the original exhaust system is too short and gives uneven exhaust cross-charging among the cylinders. Simulation result indicated that a 2.7-5.6% improvement in torque could be realised with an evenly cross-charged and longer exhaust runner. A 2% torque improvement was predicted by changing the intake manifold geometry to smaller diameter. The target engine was subsequently modified with new set of exhaust manifold and intake runner. Result showed a torque improvement of 2.7-4.5% at lower engine speed over the base design by exhaust tuning. Effect of intake tuning was not significant but it showed a similar trend as indicated by simulation.
format	Thesis
qualification_level	Master's degree
author	Khoo, Aik Soon
author_facet	Khoo, Aik Soon
author_sort	Khoo, Aik Soon
title	Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement
title_short	Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement
title_full	Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement
title_fullStr	Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement
title_full_unstemmed	Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement
title_sort	simulation and experimental studies of intake and exhaust tuning for automotive engine low-end torque enhancement
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Mekanik
publishDate	2014
url	http://eprints.usm.my/37250/1/KHOO_AIK_SOON_24_Pages.pdf
_version_	1747820656319266816

Simulation And Experimental Studies Of Intake And Exhaust Tuning For Automotive Engine Low-End Torque Enhancement

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