| 제목 |
가솔린 연료 개질 기술을 이용한 SI 엔진 열효율 향상 |
| 분야 |
가솔린엔진 |
| 언어 |
Korean |
| 저자 |
이승우(현대자동차), 정진영(현대자동차), 백홍길(현대자동차), 오희창(현대자동차), 이종혁(현대자동차), 김준석(연세대학교), 송순호(연세대학교), 전광민(연세대학교) |
| Key Words |
수소(Hydrogen), EGR(Exhaust Gas Recirculation), 연료 개질(Fuel Reforming), 열효율(Thermal Efficiency) |
| 초록 |
A well-known effective way to improve SI engine thermal efficiency is to use hydrogen mixed with gasoline. Hydrogen, even in small amounts, it makes flame speed faster, knock mitigation and improves combustion stability. These benefits enable higher compression ratios, higher EGR rates and improved SI engine thermal efficiency. Fuel reforming is one way to get hydrogen from the internal combustion engine, using hydrocarbon fuel, exhaust gas steam and heat, hydrogen reformation is achieved using species already available in the exhaust gas. However, for steam reforming to be valuable, the catalyst temperature should be above its light off temperature under engine operating condition. This study investigates how the combustion characteristics are affected by the addition of reformed hydrogen in the presence of EGR on a 4 cylinder turbo gasoline direct injection (TGDI) engine. It is in the current research that the combustion speed is increased when hydrogen from on-board fuel reforming system is supplied into combustion chamber by means of EGR gas. It is also found that total engine fuel consumption is improved with EGR limit expansion and knock mitigation. And it is confirmed that catalyst degradation should be prevented under real engine operating condition for serial production. |
| 원문(PDF) |
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