TY - JOUR
TI - Cold start characteristics study based on real time no emissions in an LPG SI engine
AU - Zu Yingli
AU - Li Gong
JN - Thermal Science
PY - 2010
VL - 14
IS - 4
SP - 939
EP - 942
PT - Article
AB - Normally, cylinder pressure was used as a criterion of combustion occurrence,  while in some conditions, it may be unreliable when identifying lean mixture  combustion. This is particularly important for fuels like liquefied petroleum  gas, which has good capacity for lean combustion. In this study, a fast  response NO detector, based on the chemiluminescence method, was used to  measure real time NO emissions in order to evaluate the technique as a  criterion for establishing combustion occurrence. Test results show that real  time NO emissions can be used to identify the cylinder combustion and misfire  occurrence during engine cranking, and real time NO emissions can be used to  understand the combustion and misfire occurrence. Real time NO emissions  mostly happened in first several cycles during cold start, and NO emissions  increased with the spark timing advancing.