Effect of Injection Strategy on Hydrogen Direct-Injection Spark-Ignition Engine
- Delivery
- Provide download link
- Format
- Price
- Non-members (tax incl.)：￥6,600 Members (tax incl.)：￥5,280
- Paper/Info type
- SAE Paper
No.2021-24-0050
- Pages
- 1-7(Total 7 p)
- Date of publication
- Sep 2021
- Publisher
- SAE International
- Language
- English
- Event
- International Conference on Engines and Vehicles 2021
Detailed Information
| Author(E) | 1) Sanguk Lee, 2) Gyeonggon Kim, 3) Choongsik Bae |
|---|---|
| Affiliation(E) | 1) Korea Advanced Inst of Science & Tech, 2) Korea Advanced Inst of Science & Tech, 3) Korea Advanced Inst of Science & Tech |
| Abstract(E) | The use of hydrogen as a possible fuel for internal combustion (IC) engines can help build a society with a clean transportation framework. Diluting the in-cylinder mixture can improve the efficiency of the engines. To prove the validity of lean burn in hydrogen IC engines, three different combustion modes are investigated in this study. The engine experiments are conducted in a spray-guided direct-injection (DI) spark-ignition engine with 10 MPa of hydrogen DI. When lean burn is applied to a hydrogen IC engine, the characteristics of pumping and heat transfer loss improve. The improvement in heat transfer loss is more significant than the reduction in negative pumping work for the indicated thermal efficiency. Among the three combustion modes, stratified charge combustion (SCC) develops the maximum indicated mean effective pressure. However, this mode deteriorates the combustion stability slightly. The nitrogen oxide emission is reduced when the excess air ratio is increased. However, a certain amount of NOx is emitted because of the locally rich mixture in SCC. Investigating the lean burn characteristics can contribute to building a clean transportation society by realizing clean and efficient hydrogen IC engines. |
