| Issue |
E3S Web Conf.
Volume 360, 2022
2022 8th International Symposium on Vehicle Emission Supervision and Environment Protection (VESEP2022)
|
|
|---|---|---|
| Article Number | 01037 | |
| Number of page(s) | 12 | |
| DOI | https://doi.org/10.1051/e3sconf/202236001037 | |
| Published online | 23 November 2022 | |
Experimental study on ultra-low raw emissions in diesel/methanol dual fuel engine based on dual-loop EGR
1 CATARC Automotive Test Center (Tianjin) Co., Ltd., Tianjin 300300, China
2 Tianjin University, Tianjin 300072, China
* Corresponding author: wutaoyang@catarc.ac.cn
In this paper, an experimental investigation on achieving ultra-low raw emissions in a diesel/methanol dual fuel engine based on dual-loop EGR was carried out. The effect of dual-loop EGR (High pressure EGR and low pressure EGR) on the combustion, performance and emissions of methanol engine has been studied comprehensively. The results show that ultra-low NOx (<0.4g/kWh) and PM (<10 mg/kWh) emissions can be achieved simultaneously in diesel methanol dual fuel engine with the help of EGR. The combustion phase is delayed with the increase of EGR rate in both EGR modes. However, the methanol equivalence ratio and in cylinder combustion temperature in high pressure EGR mode are significantly higher than those in low pressure EGR mode. Therefore, the CO and THC emissions are obviously lower in high pressure EGR mode than that in low pressure EGR mode. The combustion efficiency and brake thermal efficiency of the engine are 1.9% and 9.6% higher in high pressure EGR mode than those in low pressure EGR mode, respectively.
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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