Title: Experimental investigation on lean burn spark ignition engine using alcohol-gasoline blends

Authors: Ravi Krishnaiah; Suresh Devunuri; Jim Alexander; E. Porpatham

Addresses: School of Mechanical Engineering, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India ' School of Mechanical Engineering, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India ' School of Mechanical Engineering, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India ' School of Mechanical Engineering, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India

Abstract: This study discusses the effects of addition of small amount of alcohols on performance and emission behaviour of a gasoline fuelled lean burn SI engine. Experiments were carried out in a single cylinder diesel engine, which is made to operate as SI engine on lean condition with gasoline as a fuel. The engine was operated at wide open throttle at a compression ratio of 10.5:1 and 1,500 rpm at diverse equivalent ratios by injecting the fuel into manifold. The test outcomes stipulate that use of ethanol-gasoline blend (10% by volume) was better compared with methanol-gasoline blend (10% by volume) and pure gasoline. The test results also revealed that there was 2.5% and 7.5% improvement in brake thermal efficiency with M10 and E10 blends and apparent extension in the lean limit of operation with alcohol-gasoline blends. In emission front, reduction in hydrocarbon and carbon monoxide emissions were observed. However, carbon dioxide and nitric oxide emissions were increased due to better combustion and high in-cylinder temperature. On the whole it is concluded that small alcohol addition to gasoline improves performance and reduce emissions for lean operating SI engine.

Keywords: methanol; ethanol; lean burn; performance; emissions; combustion.

DOI: 10.1504/PIE.2020.109860

Progress in Industrial Ecology, An International Journal, 2020 Vol.14 No.2, pp.104 - 115

Received: 09 May 2019
Accepted: 02 Mar 2020

Published online: 17 Sep 2020 *

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