Design optimisation for an LPG automobile engine
by Tzann-Dwo Wu, Yih-Nan Chen, Jia-Yush Yan, Shenq-Yuh Jaw
International Journal of Vehicle Design (IJVD), Vol. 24, No. 1, 2000

Abstract: Previous attempts to convert conventional gasoline engines into Liquefied Petroleum Gas (LPG) engines have always proved futile due to lack of performance and incompatible emission levels. It is easily recognised that LPG and liquid gasoline require very different combustion conditions. Thus, an engine system designed for gasoline does not necessarily meet the required conditions for LPG operation. In addition, there is no readily available means to determine the proper operation conditions for an LPG engine. In this paper, we propose a design optimisation methodology based upon flow visualisation technique. The experimental results proved that the flow speed serves as a good measurement for the mass flow rate in the LPG engine system. The test system based on the proposed design achieved very good performance and was able to meet the Taiwan Environmental Protection Agency (EPA) emission standards.

Online publication date: Mon, 18-Aug-2003

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