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- Title
Influence of Inlet Water Injection on Energy Conservation and Emission of Gasoline Engine.
- Authors
Xu, Jiangtao; Zhou, Zhiyuan; Jiang, Liyi; Zhou, Haojie; Zhang, Chuan
- Abstract
Increased compression ratio of auto engine can effectively improve thermal efficiency. However, the risk of engine knock becomes higher when increasing the intake boosting. In this paper, the role of an inlet Water Injection (WI) system in improving the performance of a spark ignition engine was investigated, which was through a comparative study of Miller cycle with electromagnetic intake valve train (EMIT). The numerical simulation method was developed in AVL BOOST based on the engine test rig, and then the port water injection modelling was introduced. The results showed that when the engine speed was lower than 1800 r/min, the water spray scheme had a better effect on the engine performance as compared with the Miller cycle, and such advantage was increasingly significant with the decrease of the speed. This is due to the fact that the water injection takes into account the temperature reduction in the cylinder. When the engine speed was over 1800 r/min, it had a negative impact on engine performance with IWI due to the excessive suppression of combustion. This study provides a theoretical basis for design and research of gasoline engines.
- Subjects
SPARK ignition engines; ENERGY conservation; KNOCK in automobile engines; THERMAL efficiency; ENGINE testing; INLETS
- Publication
International Journal of Automotive Technology, 2023, Vol 24, Issue 4, p935
- ISSN
1229-9138
- Publication type
Article
- DOI
10.1007/s12239-023-0076-8