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Engine Modeling and Validation for Control System Design of a Gaseous-fuel Engine  

심한섭 (한양대학교 대학원)
선우명호 (한양대학교 자동차공학과)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.11, no.1, 2003 , pp. 7-17 More about this Journal
Abstract
Highly accurate control of an air-fuel ratio is very important to reduce exhaust gas emissions of gaseous-fuel engines. In order to achieve this purpose, a precise engine model is required to estimate engine performance from the engine design process which is applied to the design of an engine controller. Engine dynamics are considered to develop a dynamic engine model of a gaseous-fuel engine. An effective air mass ratio is proposed to study variations of the engine dynamics according to the water vapor and the gaseous-fuel in the mixture. The dynamic engine model is validated with the LPG engine under steady and transient operating conditions. The experimental results in the LPG gaseous-fuel engine show that the estimation of the air flow and the air-fuel ratio based upon the effective air mass ratio is more accurate than that of a normal engine model.
Keywords
Gaseous-fuel; Compressed natural gas(CNG); Liquefied petroleum gas(LPG); Engine model; Controller; Effective air mass ratio;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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