Acoustic Study of an Air Intake System of SI Engine using 1-Dimensional Approach

Dahlan, Afiq Aiman; Said, Mohd Ismid Mohd; Latiff, Zulkarnain Abdul; Perang, Mohd Rozi Mohd; Bakar, Suhaimi Abu; Jalal, Rifqi Irzuan Abdul

doi:10.15282/ijame.16.1.2019.14.0476

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…Although the peak noise of both frequencies are lower than the peak noise at 197 Hz, the addition of two frequencies may affect the perceived loudness of the AIS. When comparing the results of this analysis with the research done in [9], the characteristics of the Helmholtz resonator can be seen present at the research done. The results of the research show a similar pattern that can be seen when a Helmholtz resonator is introduced into the AIS to tackle resonance.…”

Section: Resultsmentioning

confidence: 77%

Design Improvements of Acoustic Response of an Automotive Air Intake System

Yap

Bakar

Dawood³

et al. 2021

MATEC Web Conf.

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This study aims to improve the acoustic response of an automotive air intake system (AIS) using harmonics acoustics analysis system. Noise pollution imposes adverse health effects on human beings. One of the sources of noise pollution comes from the transportation sector. Combustion engines produce noise through the act of combustion during operation. Noise generated by the AIS affects the comfort and long-term health of humans during operations. The noise produced by the AIS can be reduced through the introduction to resonators. A baseline result was modelled through creating an internal cavity and running a harmonics acoustic analysis simulation in ANSYS. Transmission loss and frequency response data was analysed as well as the location of the noise through visual contour. Modifications to the baseline geometry were done through the addition of a resonator targeted at 197 Hz and the geometry was then analysed again through the same parameters with harmonics acoustics analysis. The results show the resonator is effective with the peak in noise at 197 Hz reduced but additional noise is introduced as a result of the addition of a resonator into the AIS.

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Section: Resultsmentioning

confidence: 77%

Design Improvements of Acoustic Response of an Automotive Air Intake System

Yap

Bakar

Dawood³

et al. 2021

MATEC Web Conf.

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“…The engine's intake system is responsible for supplying ambient air to the engine's cylinders with the right purity [1], in the right quantities and at the right pressure and temperature to ensure proper fuel combustion in the cylinders [2] and minimize wear on engine components [3,4]. In addition, the intake system, has the task of suppressing the noise caused by the flow of the air stream [5] and forcing the wave phenomena of the flowing air causing resonant charging, which increases the filling pressure p N in the cylinders, resulting in an increase in engine power [6].…”

Section: Introductionmentioning

confidence: 99%

Empirical study of the effect of the air filter on the performance and exhaust emissions of a diesel engine

Dziubak¹,

Karczewski²,

Dziobek³

2023

Combustion Engines

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The results of an experimental study of the effect of the pressure drop of the air filter pf on the operat-ing parameters and exhaust emissions of a modern CI internal combustion engine of a truck equipped with an electronically controlled power system are presented. The tests were carried out for an air filter with a clean filter cartridge Δpf0 = 0,58 kPa and with a cartridge contaminated after a service mileage (about 50 thousand km) ΔpfD = 2,024 kPa. In each test, engine performance, exhaust emissions and relative change in emissions were determined: CO, NOx, HC, CO2, H2O. It was found that an increase in the filter resistance pf causes a decrease in the filling degree by 12%, engine useful power by almost 10%, exhaust gas temperature by a maximum of 30oC and an increase in specific fuel consumption by almost 5%. Air filter resistance has no significant effect on NOx emissions and HC concentration. There is a reduction in H2O emissions by up to 7%, CO by up to 13% and CO2 by up to 4%, and an increase in oxygen emissions by 15%, depending on operating conditions.

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“…Another task of the intake system is to damp the noise of the combustion process in the [11] engine and forcing the wave phenomena causing the so-called dynamic (resonant) supercharging in the desired engine operating ranges, thus increasing cylinder filling and engine power [12]. For this reason, work is constantly being carried out to (a) improve the engine filling process with fresh load by improving the design of the intake system and (b) improve the air intake filtration process by using more and more effective and precise filtration materials.…”

Section: Introductionmentioning

confidence: 99%

“…In [11], a simulation was carried out to improve the existing design of the air intake system for acoustic testing; to achieve better sound quality by modifying the resonators, air duct and air chamber volume of the air intake module. This study used a 1-dimensional simulation using commercial software correlated with a 1.6 litre naturally aspirated engine.…”

Section: Introductionmentioning

confidence: 99%

Material Properties Analysis with Addition of Nanofibres for Air Intake Filtration in Internal Combustion Engines

Dziubak¹

2021

IJAME

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The aim of this study is to provide an experimental properties evaluation of a standard filter material (cellulose) and materials with fiber layer addition with small diameters (nanofibers). Filter media, including cellulose, used in the internal combustion engine inlet air filtration are made of high diameter fibres, approx. 15 µm. Significantly higher separation and filtration efficiency performance are obtained for materials with lower fibre diameters (nanofibres), however, at the expense of a significantly higher pressure drop, affecting the engine performance. Filter media manufacturers mainly specify the structure parameters (pore size, air permeability and thickness), without giving any information on the dust filtration performance and rate. The literature includes test results for models of different filter media structures. Filtration process modelling using polydisperse dust with particles of different shape and density and irregular filter media structure is possible using advanced computer techniques, however, the process is complex and requires many simplifications. Test results can be applied directly in the automotive industry. The data can be obtained by experimental tests on filter medium specimens, complete filter elements or air filters which are costly and time-consuming tests, however, those test methods are the most reliable. Conditions and testing methodology for intake air filter materials used in internal combustion engines were developed. Filtration and flow resistance efficiency and accuracy were done depending on test dust mass stopped per unit area. Tested materials filtration efficiency was assessed by a filtration quality factor, which includes experimentally determined efficiency and accuracy as well as flow resistance values. Much higher efficiency and filtration accuracy of dust grains below 5 µm in filtration materials with nanofibers addition compared to standard filtration material (filter paper) were demonstrated. For the same flow resistance values, filter materials with nanofibers addition accumulate smaller dust mass than standard filter paper. Usage of materials with nanofibers addition used in motor vehicles intake air filtration ensures their high efficiency and accuracy. It minimises its components wear, but at the expense of faster flow resistance increase, which shortens filter life and increases filter replacement frequency. Results obtained during the experimental research partly fill the gap when it comes to the basic material properties used in internal combustion engines intake air filter partitions production.

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Acoustic Study of an Air Intake System of SI Engine using 1-Dimensional Approach

Cited by 7 publications

References 10 publications

Design Improvements of Acoustic Response of an Automotive Air Intake System

Design Improvements of Acoustic Response of an Automotive Air Intake System

Empirical study of the effect of the air filter on the performance and exhaust emissions of a diesel engine

Material Properties Analysis with Addition of Nanofibres for Air Intake Filtration in Internal Combustion Engines

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