| Issue |
E3S Web Conf.
Volume 360, 2022
2022 8th International Symposium on Vehicle Emission Supervision and Environment Protection (VESEP2022)
|
|
|---|---|---|
| Article Number | 01021 | |
| Number of page(s) | 12 | |
| DOI | https://doi.org/10.1051/e3sconf/202236001021 | |
| Published online | 23 November 2022 | |
Study on methanol premixed coupled with EGR to achieve ultra-low emissions in diesel engine
1 China Automotive Technology & Research Center Co. Ltd, Tianjin 300300, China
2 Tianjin University, Tianjin 30072, China
* Corresponding author: wutaoyang@catarc.ac.cn
In this paper, an experimental investigation on achieving ultra-low emissions in diesel engine was carried out using intake premixed methanol and EGR technology. The influence of EGR introduction method on combustion and performances were studied comprehensively. The results show that ultra-low NOx (<0.4g/kWh) and PM (<10mg/kWh) emissions can be achieved simultaneously in diesel methanol dual fuel (DMDF) highly premixed low-temperature combustion mode. Compared with low-pressure EGR (LP-EGR), the excess air coefficients under high-pressure EGR (HP-EGR) drops more significantly. At the same EGR rate, the in-cylinder mean temperature and equivalent of mixture are higher under HP-EGR conditions, which results in higher combustion efficiency, lower CO and THC emissions. The maximum brake thermal efficiency of high-pressure EGR is 9.6% higher than that of low-pressure EGR.
Key words: Ultra-low emissions / Low-temperature combustion / Methanol premixed / Exhaust gas recirculation / Brake thermal efficiency
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
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