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Various Injection Conditions and Fuel Control of an LPG Liquid Injection Engine  

Sim Hansub (Department of Automotive Engineering, Jinju National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.1, 2005 , pp. 28-35 More about this Journal
Abstract
Fuel injection rate of an injector is affected by various injection conditions such as injection duration, fuel temperature, injection pressure, and voltage in LPG liquid injection systems for either a port-fuel-injection(PFI) or a direct injection(DI) in a cylinder. Even fuel injection conditions are changed, the air-fuel ratio should be accurately controlled to educe exhaust emissions. In this study, correction factor for the fuel injection rate of an injector is derived from the density ratio and the pressure difference ratio. A voltage correction factor is researched from injection test results on an LPG liquid injection engine. A compensation method of the fuel injection rate is proposed for a fuel injection control system. The experimental results for the LPG liquid injection system in a SI-engine show that this system works well on experimental range of engine speed and load conditions. And the fuel injection rate is accurately controlled by the proposed compensation method.
Keywords
LPG(Liquefied petroleum gas); Liquid injection system; Fuel injection control; Correction factor; Injection duration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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