| 张孔明，梁世希，金则兵，张帆，王科，刘敬平.某LNG发动机进气补气对缸内过程的影响[J].内燃机工程,2017,38(1):81-87. |
| Analysis of the In-Cylinder Process of a LNG Engine With Extra Air Supply |
| DOI： |
| Key Words:IC engine LNG engine air supply diagnostics the rate of heart release AFR |
|
| 摘要点击次数: 2679 |
| 全文下载次数: 1940 |
| Abstract:The engine related parameters， such as intake manifold pressure， air/fuel ratio（AFR）， fuel mass flow-rate， as well as dynamic in-cylinder pressure traces， were measured on a turbocharged LNG engine with external air injection according to the transient procedure. During the transient and ramped modal testing， the engine experienced not only abrupt change of boost pressure and AFR， but also rapid engine load change. The changes in the in-cylinder combustion process during the transient test cycle， which were rarely revealed before， were illustrated with the rate of heat release（ROHR） characteristics. The influence of operation parameters on the combustion process under transient conditions was examined and discussed. Moreover， the existence of abnormal combustion such as late combustion， misfiring and severe variation of IMEP， etc. was pointed out. The possible cause of those abnormal combustion phenomena was also analyzed. Results show that under steady state and transient conditions， the LNG engine combustion process is dominated by the relative AFR. |
| 查看全文 查看/发表评论 下载PDF阅读器 |