23 0

2단 분사 PCCI 엔진의 아트킨슨 사이클 적용을 위한 기초 연구

Title
2단 분사 PCCI 엔진의 아트킨슨 사이클 적용을 위한 기초 연구
Other Titles
A preliminary study for applying of atkinson cycle on the 2-stage injection type PCCI engine
Author
이기형
Keywords
Premixed charge compression ignition; 예혼합 압축착화; Atkinson cycle; 아트킨슨 사이클; MEP; 평균유효 압력; Compression ratio; 압축비; Effective compression ratio; 유효압축비
Issue Date
2009-04
Publisher
한국자동차공학회
Citation
2009 KSAE 부문종합 학술대회, Page, 107-112
Abstract
It is well known that diesel engines generate a large amount of NOx and PM because of locally excessive richness and overall lean combustion. Recently, a premixed charge compression ignition (PCCI) engine has received attention for its attractive advanced combustion process because this combustion system can reduce NOx and PM simultaneously. However, PCCI engines have a disadvantage that the combustion efficiency is relatively low when the PCCI strategy is applied to conventional diesel engines, the combustion takes place before TDC due to the spontaneous pre-ignition property of diesel. Many researchers have been trying to overcome the drawback by retarding the ignition timing with low compression ratios. In this study a modified cam having the fixed opening timing of the intake valve and the 30° retarded closing timing was employed to reduce the effective compression ratio. Although the Atkinson cycle with a retarded cam leads to a low in-cylinder pressure in the compression stroke, the engine work can increase through the compensation of the max pressure. On that account, we applied various advanced second injection timings to raise the max pressure up to the same pressure as the original cam's.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE01506580http://repository.hanyang.ac.kr/handle/20.500.11754/103899
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE