Acoustic transfer function in gasoline engines

Mahroogi, Faisal O.; Narayan, Seema; Gupta, Vipul

doi:10.1504/ijvnv.2018.097212

Cited by 7 publications

(3 citation statements)

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“…Therefore, NOX emission increases with increase in engine speed for most of the biodiesel blends. This is mainly due to the fact that methyl esters (biodiesel) are oxygenated fuel, more oxygen is available for the formation of NOX and have higher cetane number [17–21, 31–56].…”

Section: Resultsmentioning

confidence: 99%

Quality assessments, performance, and emissions evaluation of biodiesel from citrullus lanatus oil seeds and diesel blends in compression ignition engine

Narayan

Kaisan

Mahroogi

2023

The Journal of Engineering

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Due to limited stock of levels of fossil fuel resources and ecological issues, biodiesel is becoming an attractive alternative choice for replacing conventional fuels. Biodiesel can be used by mixing with different fuels like citrullus lanatus seeds, camphor, cleaner fuel injector, sunflower, safflower, soybean, cottonseed, rapeseed, palm, Jatropha, and Moringa oil seeds. This paper reviews use of biofuels blended with citrullus lanatus seeds. The citrullus lanatus biodiesel was mixed with diesel in different percentages by volume. Some physico‐chemical characteristics of blends and pure diesel were investigated and it was established that it conforms to the American Society of Testing Materials (ASTM) standards. The exceptions were the viscosity and specific gravity of the pure biodiesel B100 which were 0.09 and 0.018 mm2/s above the ASTM standard, respectively. All blends were run on a stationary 4‐cylinder diesel engine at 70% loading and speeds of 1500, 2000, and 2500 rpm. It was deduced that B10 gave the best brake power, thermal efficiency, and optimum specific fuel consumption at a speed of 2500 rpm. B15 gave the highest brake mean effective pressure. B25 and B100 gave the least values of brake power and brake thermal efficiency across the speeds. B100 gave the highest brake specific fuel consumption. Furthermore, the exhaust emission gases such as CO2, CO, NOx, and HC in different engine conditions stated above were recorded and analyzed. It was found that B25 emitted about 53% lesser CO2 and 37% lesser CO as compared to pure diesel with zero HC at 2500 rpm. The blends were better in terms of engine performance and also in reduction of emissions in most cases, than pure diesel fuel. Problem statement: Various emissions from engines like unburnt hydro carbons, particulate emissions, NOx, and CO have bad effects on ecology. This work presents an overview on use of novel hybrid fuels in compression ignition engines with an aim of mitigating effects of emissions on environment. Biodiesel was blended with Citrullus lanatus oil and pure diesel in different proportions to see effects on performance of diesel engines. The presented work may pave the way for use of alternative cheap and environmentally friendly fuels in automotive systems.

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Section: Resultsmentioning

confidence: 99%

Quality assessments, performance, and emissions evaluation of biodiesel from citrullus lanatus oil seeds and diesel blends in compression ignition engine

Narayan

Kaisan

Mahroogi

2023

The Journal of Engineering

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“…Thus, an effective control mechanism over combustion noise can be achieved by devising optimum MBF50/MBF100 timings (ChangweiJi et al, 2012).Performance; F.O. Mahroogi et al, 2018;GrujicI. et al, 2020;Javad Zareei et al, 2020; M.U.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Assessment of in-cylinder pressure in diesel engines using novel combustion indices

et al. 2021

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Efficient monitoring of combustion process is a key for regulating emissions from engine as well as achieving fuel economy. Various non-intrusive methods of diagnosis for engines include monitoring of noise, and vibrations emitted are attractive options that are cheap, reliable, and need no modifications in the engine set up under test. Combustion process occurring inside combustion chamber of engine provides important information about cyclic efficiency, heat losses, as well as noise and vibration (NVH) performance of engines. Earlier NVH aspects were thought to closely correlate with the development of in-cylinder pressure inside combustion chamber. However, there have been contradictions to this idea prompting the need for further evaluations. The presented work discusses a novel methodology that may be used for analysis of in-cylinder pressure development during the combustion process for a diesel engine. The in-cylinder pressure development in a small-sized diesel engine was analyzed with the aim to extract information about various indicators that characterize the development of combustion processes. Novel indices were developed based on noise, pressure, and vibrations signature of engines , which were much more correlated to combustion process development. The correlative relationship shows the effectiveness of the proposed methodology for condition monitoring for engines.

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“…F. Bearing noise -bearings in crankshaft and connecting rod have clearances that generate noise [26]. Torsional and bending resonance give rise to rumbling noise [27]. Clearance optimization of, application of crank shaft damper and flexible flywheel design may be used to control this sour of noise.…”

Section: Sources Of Noise and Vibrations In Enginementioning

confidence: 99%

A review of vibro-acoustic techniques for control of combustion engine noise

Narayan¹,

Kaisan²,

Abubakar³

2021

J Appl Eng Science

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The present work focuses on various vibro-acoustic signals techniques that can monitor malfunctions in Internal Combustion Engines (ICEs). Recent works by other authors have focused on various reciprocating machines including compressors no attempts has been deal with IC engines. This paper gives a summary of the generation mechanism of sound and vibration in Engines. An overview of the monitoring and diagnostic techniques base on noise, pressure an vibration signatures is also discussed. Various fault conditions are described which affect ICEs. Measuring of acoustic signals has non-intrusive behavior with capability of detecting airborne transmission paths faults. In view of industrial needs to reduce the maintenance costs monitoring of vehicle operations, the present work can be a useful guide for engineers for understanding types of faults so as sufficient time is obtained to process reliable and information.

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Acoustic transfer function in gasoline engines

Cited by 7 publications

References 0 publications

Quality assessments, performance, and emissions evaluation of biodiesel from citrullus lanatus oil seeds and diesel blends in compression ignition engine

Quality assessments, performance, and emissions evaluation of biodiesel from citrullus lanatus oil seeds and diesel blends in compression ignition engine

Assessment of in-cylinder pressure in diesel engines using novel combustion indices

A review of vibro-acoustic techniques for control of combustion engine noise

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