10-16 2015 [(정기)학술대회 및 전시회]
| 제목 | LPG 직분 연료 공급 시스템에서 연료 리턴에 의한 연료 냉각효과 연구 |
|---|---|
| 분야 | 연료 및 윤활유/연비 |
| 언어 | Korean |
| 저자 | 이정호(인하대학교), 이대엽(인하대학교), 이충근(인하대학교), 이종혁(인하대학교), 이진학(인하대학교) |
| Key Words | LPG(액화석유가스), SIDI (점화착화 직접분사), Vapor lock(베이퍼락), HPP(고압펌프), PN(Particulate Number) |
| 초록 |
In order to meet the emissions standards for PM and PN, a development of technology for LPG SIDI(Spark Ignition Direct Injection) fuel supply system and for its application are necessary. Prevention of a vapor lock with use of LPG fuel leads to begin this work. The purpose of this work is to provide optimum design methods for preventing the locking of the fuel vapor from the LPG fuel supply system, and contributes to construction of the designed data. An effect of fuel cooling by returning some fuel from the high pressure pump to the fuel tank is identified using a rig system with Butane/propane= 70%/30% fuel, which enables to estimate the increase of temperature to slow down up to max. 1.4 times. As returning amount of fuel increases, an effect of cooling fuel pump varies and thus an excessive use of low pressure pump leads to the durability and fuel economy problems. Therefore, this work suggests the variable control of returning amount of fuel needs to be reviewed and applied. Measured results of temperature change of high pressure pump show that, after heating to high temperature, it is confirmed that a start of return(opening of return valve) lowers(cools) the temperature of high pressure pump. This concludes that low pressure pump(in-tank motor) enables to cool down the high pressure pump and thus reduce the start time at high temperature re-startability. |
| 원문(PDF) | 다운로드 |