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(콘티넨탈 오토모티브) (콘티넨탈 오토모티브) (콘티넨탈 오토모티브) (현대기아자동차) (현대기아자동차) (현대기아자동차) (현대기아자동차) (모토닉)
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한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제24권 제6호
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    초록·키워드

    The new 1.4 L turbocharged LPG direct injection (T-LPDI) engine is presented in this paper to improve the fuel efficiency of the vehicles installed with the 2.0 L LPG port fuel injection (LPI) engine, while maintaining the performance as a downsizing concept for the new engine platform development. Firstly, the return type high pressure LPG fuel supply system is designed and mounted in the new 1.4 L T-LPDI engine. As a result, this new engine shows a much better WOT performance and approximately 8 % of improved fuel economy level, as compared to the 2.0 L LPI vehicle. Secondly, the LPDI engine specific optimized design for high pressure fuel components and fuel injection control strategies are proposed and evaluated in order to overcome the restartability problem in a heat-soaked condition called the vapor lock phenomenon. Consequently, these experimental results illustrate a great potential for the developed 1.4 L T-LPDI engine as a possible substitute for the 2.0 L LPI engine.

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      UCI(KEPA) : I410-ECN-0101-2017-556-001647983