Effects of injection strategies on the flow and fuel behavior characteristics in port dual injection engine

Seung Yeob Lee; Ho Jun Lee; Yong Tae Kang; Jin Taek Chung

doi:10.1016/j.energy.2018.09.026

Effects of injection strategies on the flow and fuel behavior characteristics in port dual injection engine

Seung Yeob Lee, Ho Jun Lee, Yong Tae Kang, Jin Taek Chung

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The port dual injection (PDI) technology is proposed to improve the fuel efficiency and emission characteristics of the downsized SI engine by adding an injector to the intake port. For effective design of the PDI engine, the effects of additional design parameters on the engine performance due to the added injector should be taken in to account. In this study, we analyze the effects of the fuel injection timing and injection targeting related to the injection strategies of the PDI engine on the internal flow and fuel behavior characteristics using computational fluid dynamics (CFD). The CFD analysis is conducted using the STAR-CD, a three-dimensional unsteady simulation program. To confirm the accuracy of CFD analysis, the experimental verification is carried out. The liquid fuel films, evaporated fuel and air-fuel mixture uniformity affecting the fuel efficiency and emissions of the engine are analyzed at various injection conditions. It is concluded that the fuel film amount decreases by approximately 73.04% compared to the standard injection method when the engine is operated at the optimum conditions selected in this study.

Original language	English
Pages (from-to)	666-676
Number of pages	11
Journal	Energy
Volume	165
DOIs	https://doi.org/10.1016/j.energy.2018.09.026
Publication status	Published - 2018 Dec 15

Keywords

Computational fluid dynamics
Fuel film
Injection strategy
Internal combustion engine
Port dual injection

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Pollution
Mechanical Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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10.1016/j.energy.2018.09.026

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title = "Effects of injection strategies on the flow and fuel behavior characteristics in port dual injection engine",

abstract = "The port dual injection (PDI) technology is proposed to improve the fuel efficiency and emission characteristics of the downsized SI engine by adding an injector to the intake port. For effective design of the PDI engine, the effects of additional design parameters on the engine performance due to the added injector should be taken in to account. In this study, we analyze the effects of the fuel injection timing and injection targeting related to the injection strategies of the PDI engine on the internal flow and fuel behavior characteristics using computational fluid dynamics (CFD). The CFD analysis is conducted using the STAR-CD, a three-dimensional unsteady simulation program. To confirm the accuracy of CFD analysis, the experimental verification is carried out. The liquid fuel films, evaporated fuel and air-fuel mixture uniformity affecting the fuel efficiency and emissions of the engine are analyzed at various injection conditions. It is concluded that the fuel film amount decreases by approximately 73.04% compared to the standard injection method when the engine is operated at the optimum conditions selected in this study.",

keywords = "Computational fluid dynamics, Fuel film, Injection strategy, Internal combustion engine, Port dual injection",

author = "Lee, {Seung Yeob} and Lee, {Ho Jun} and Kang, {Yong Tae} and Chung, {Jin Taek}",

note = "Funding Information: This work was supported by the CEFV (Center for Environmentally Friendly Vehicle) as Global-Top Project of KMOE (Ministry of Environment, Korea). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

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day = "15",

doi = "10.1016/j.energy.2018.09.026",

language = "English",

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AU - Lee, Seung Yeob

AU - Lee, Ho Jun

AU - Kang, Yong Tae

AU - Chung, Jin Taek

N1 - Funding Information: This work was supported by the CEFV (Center for Environmentally Friendly Vehicle) as Global-Top Project of KMOE (Ministry of Environment, Korea). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/12/15

Y1 - 2018/12/15

N2 - The port dual injection (PDI) technology is proposed to improve the fuel efficiency and emission characteristics of the downsized SI engine by adding an injector to the intake port. For effective design of the PDI engine, the effects of additional design parameters on the engine performance due to the added injector should be taken in to account. In this study, we analyze the effects of the fuel injection timing and injection targeting related to the injection strategies of the PDI engine on the internal flow and fuel behavior characteristics using computational fluid dynamics (CFD). The CFD analysis is conducted using the STAR-CD, a three-dimensional unsteady simulation program. To confirm the accuracy of CFD analysis, the experimental verification is carried out. The liquid fuel films, evaporated fuel and air-fuel mixture uniformity affecting the fuel efficiency and emissions of the engine are analyzed at various injection conditions. It is concluded that the fuel film amount decreases by approximately 73.04% compared to the standard injection method when the engine is operated at the optimum conditions selected in this study.

AB - The port dual injection (PDI) technology is proposed to improve the fuel efficiency and emission characteristics of the downsized SI engine by adding an injector to the intake port. For effective design of the PDI engine, the effects of additional design parameters on the engine performance due to the added injector should be taken in to account. In this study, we analyze the effects of the fuel injection timing and injection targeting related to the injection strategies of the PDI engine on the internal flow and fuel behavior characteristics using computational fluid dynamics (CFD). The CFD analysis is conducted using the STAR-CD, a three-dimensional unsteady simulation program. To confirm the accuracy of CFD analysis, the experimental verification is carried out. The liquid fuel films, evaporated fuel and air-fuel mixture uniformity affecting the fuel efficiency and emissions of the engine are analyzed at various injection conditions. It is concluded that the fuel film amount decreases by approximately 73.04% compared to the standard injection method when the engine is operated at the optimum conditions selected in this study.

KW - Computational fluid dynamics

KW - Fuel film

KW - Injection strategy

KW - Internal combustion engine

KW - Port dual injection

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Effects of injection strategies on the flow and fuel behavior characteristics in port dual injection engine

Abstract

Keywords

ASJC Scopus subject areas

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