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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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 |