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Effects of Multi-Stage Split Injection on Efficiency and Emissions of Light-Duty Diesel Engine
| Content Provider | MDPI |
|---|---|
| Author | Kang, Seungwoo Lee, Sanguk Bae, Choongsik |
| Copyright Year | 2022 |
| Description | The efficiency of light-duty diesel engines should be improved for further emissions regulation. Multi-stage split injection with five injection events was investigated for improvement in efficiency at low-load conditions. The injection timing and quantity were adjusted to achieve a smooth in-cylinder pressure rise and continuous heat release. The multi-stage split injection was compared to injection strategies involving two-pilot and single-main injections. A 0.5 L single-cylinder diesel engine experiment was conducted under low-load conditions. Two multi-stage split injection processes with different combustion phases were developed. The multi-stage split injections yielded a smooth in-cylinder pressure trace and a lower peak heat release rate than the two-pilot injection process. The combustion duration was shorter for multi-stage split injection with an advanced combustion phase, and the fuel consumption was reduced by 1.78% with lower heat transfer, exhaust heat, and combustion loss. The multi-stage split injection flame penetration was shorter than the two-pilot injections. The shorter flame penetration and lower tip velocity reduced the heat transfer to the combustion chamber. The PM emissions were also reduced by 30% under the same NOx emissions, because increased PM oxidation and divided fuel injection prevented flame diffusion and improved air utilization. |
| Starting Page | 2219 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en15062219 |
| Journal | Energies |
| Issue Number | 6 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-18 |
| Access Restriction | Open |
| Subject Keyword | Energies Environmental Engineering Injection Strategy Split Injection Flame Visualization Engine Efficiency Engine Emissions |
| Content Type | Text |
| Resource Type | Article |
