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Assessment of free-rotating air swirling device to reduce SI engine emissions and improve fuel economy

Kafafy, Raed Ismail and Che Mat, Sharzali (2011) Assessment of free-rotating air swirling device to reduce SI engine emissions and improve fuel economy. International Journal of Vehicle Systems Modelling and Testing, 6 (3/4). pp. 283-306. ISSN 1745-6444 (O), 1745-6436 (P)

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Claims are furnished in several patents that swirling the intake air in SI engines can improve fuel economy and reduce environmental impact. In this paper, we investigate the effect of a free rotating air swirling device (FRASD) installed in the air intake hose on the overall performance and emission characteristics of an SI engine. FRASDs with three vane angles were tested; 6, 9 and 12 degrees. The baseline engine was tested without FRASD at selected loads. Then, the engine was tested at the same loads with each FRASD and results were compared with the baseline engine. Experiments show that all tested FRASDs exhibit some degree of enhancement in the overall performance and reduction in exhaust emissions. It was found that enhancement greatly depends on the engine operating condition in addition to the FRASD vane angle. Specifically, best enhancement in performance and highest reduction in emissions was observed with the 9-degrees which reduced specific fuel consumption by 12%, hydrocarbon (HC) emissions by 20% and carbon monoxide emissions by 12%. Suggestions are made to modify the FRASD design to magnify its impact on engine performance.

Item Type: Article (Journal)
Additional Information: 5259/17244
Uncontrolled Keywords: intake air; swirler; engine performance; fuel economy; exhaust emissions; spark ignition engines; free-rotating air swirling; environmental impact; air intake hose; fuel consumption; hydrocarbon emissions; carbon monoxide emissions.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Depositing User: Dr Raed Kafafy
Date Deposited: 14 Mar 2012 14:57
Last Modified: 14 Mar 2012 14:58
URI: http://irep.iium.edu.my/id/eprint/17244

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