Effect of Variable Compression Ratio and Intake Charge Dilution on Fuel Efficiency and Emission for a Spark Ignition Engine

Chaudhari, Ashish J.; Kulkarni, Vinayak; Sahoo, Niranjan

doi:10.4271/2015-01-0772

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The cycle-by-cycle variation in indicated work per cycle can be estimated using coefficient of variance (COV) which can be evaluated by using equations (6) to (8) 28,55,56 …”

Section: Resultsmentioning

confidence: 99%

Effect of vertical location of the spark plug on the performance of a raw biogas-fueled variable compression ratio spark ignition engine

Chaudhari

Hotta

Sahoo

et al. 2019

Energy & Environment

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The present experimental investigations deal with the spark plug location and its effect on the performance and emission of a 100% raw biogas-fueled variable compression ratio engine. Different measurements of performance, combustion, and emission parameters are used to analyze the effect of four spark locations protruded inside the clearance volume (viz. 0, 2, 5, and 10 mm). The protrusion of the spark plug by 2 mm is observed to be optimum for compression ratios 8, 9, and 10. For this optimum spark plug location, engine efficiency and fuel economy are found to be higher. Faster combustion, in this particular case, has led to early and higher peak cylinder pressure and burnt gas temperature. Lower emissions of hydrocarbons and carbon monoxide have verified the optimality of 2 mm protrusion location of the spark plug for all the compression ratios. Thus, present investigations recommend minor protrusion of the spark plug to assist the combustion process, to enhance the performance and lowering the emission of a biogas-fueled engine.

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“…The cycle-by-cycle variation in indicated work per cycle can be estimated using coefficient of variance (COV) which can be evaluated by using equations (6) to (8) 28,55,56 …”

Section: Resultsmentioning

confidence: 99%

Effect of vertical location of the spark plug on the performance of a raw biogas-fueled variable compression ratio spark ignition engine

Chaudhari

Hotta

Sahoo

et al. 2019

Energy & Environment

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“…brake power, brake-specific fuel consumption (BSFC) and brake thermal efficiency (BTE), are considered for the proposed evaluation where experiments are performed at different CRs using the present VCR mechanism for 52% wide open throttle position. Choice of this throttle position is based on the fact that on-road vehicles run between 30% and 60% throttle position for best performance and most economic fuel consumption [26]. The details of the experimental matrix are given in table 4.…”

Section: Investigations With Small Size Enginementioning

confidence: 99%

State-of-the-art technology in variable compression ratio mechanism for spark ignition engine

2018

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Present investigations deal with development of a novel variable compression ratio (VCR) mechanism and its implementation in a small and relatively large size single-cylinder engines. Operation of this mechanism is found to be smooth and effective in the running condition of the engine as well. This mechanism, when incorporated in the small size spark ignition HONDA engine, portrayed improvement in engine performance with increment in compression ratio (CR) for petrol and kerosene. Their respective optimum CRs 5.02 (petrol) and 5.27 (kerosene) are higher than the base value 4.8. In case of large size KIRLOSKAR engine, the present VCR mechanism is found to be useful while operating with liquefied petroleum gas (LPG), where measurements showed that combustion duration is lower with LPG for CR 9.79 as compared with base value 9.0. The present experiments clearly demonstrate the usefulness of VCR mechanism in improving engine performance for a given fuel and broadening the range of alternative fuels burnt in the engine. Ease of fabrication, simplicity in installation, accessibility in troubleshooting and smooth run-time alterations are the advantages with the current novel mechanism.

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“…The addition of additives enhanced both brake thermal efficiency and brake-specific fuel consumption by about 7%, according to the study. Chaudhari et al [46] studied the effect of various fuel blends comprising regular diesel fuel and waste cooking oil methyl ester on the performance of diesel engines. The study determined that biodiesel (methyl ester) is one of the fuel options that can be used in a standard diesel engine with no design changes.…”

Section: Introductionmentioning

confidence: 99%

Effect of Diethyl Ether on the Performance and Emission Characteristics of a Diesel Engine Fueled with a Light Fraction of Waste Cooking Oil

Samraj,

Barik,

Bhatlu

et al. 2023

Processes

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In this study, a diesel engine was used to operate with blends of light fraction waste cooking oil (LFWCO) with diethyl ether (DEE). DEE was blended as an additive in the 5% to 20% ratio in steps of 5% each. The test indicates that LFWCO+15-DEE produced optimum results regarding performance and emission. The BSFC for LFWCO+15-DEE was found to be higher by about 28.9%, and the BTE was lower by about 7.6%, in contrast to diesel, at 100% operating load, respectively. For LFWCO+15-DEE the EGT was lower by about 11.9%, in contrast to neat diesel, at 100% operating load. The various emissions such as carbon monoxide (CO), nitrous oxide (NO), and smoke opacity for LFWCO+15-DEE were found to be lower by about 32.9%, 25%, and 29.4%, but the NO release was more than other blends and it was about 36%, in contrast to diesel at 100% operating load, respectively.

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Effect of Variable Compression Ratio and Intake Charge Dilution on Fuel Efficiency and Emission for a Spark Ignition Engine

Cited by 4 publications

References 21 publications

Effect of vertical location of the spark plug on the performance of a raw biogas-fueled variable compression ratio spark ignition engine

Effect of vertical location of the spark plug on the performance of a raw biogas-fueled variable compression ratio spark ignition engine

State-of-the-art technology in variable compression ratio mechanism for spark ignition engine

Effect of Diethyl Ether on the Performance and Emission Characteristics of a Diesel Engine Fueled with a Light Fraction of Waste Cooking Oil

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