Russian Federation
The aim of the study was to quantify the effect of fuel injection duration on the formation of toxic components in diesel exhaust gases to substantiate measures for reducing technogenic load. Bench tests of the 6ChN 15/18 (D6N-250) diesel engine with a power of 189 kW at 1 900 rpm were carried out according to GOST 31967–2012, GOST 24028–2013 using the 13-mode test cycle. The injection duration was varied from 20 to 35° CA, exhaust gas sampling and analysis were performed, and particulate matter dispersion was determined. It was found that increasing the injection duration from 20 to 35° CA leads to an increase in incomplete combustion products: CO emissions increase by 1,93 times, particulate matter by 1,35 times, hydrocarbons by 1,64 times. Simultaneously, nitrogen oxide emissions decrease by 2,27 times due to the shift of the combustion process to the expansion line. An increase in the average diameter of particulate matter was revealed with extended injection. Comparison with environmental standards showed that none of the studied modes ensures compliance with EURO 4–6 standards for all components; particulate matter emissions exceed EURO 6 standards by 35 times. The scientific novelty lies in obtaining quantitative relationships between injection duration and the formation of toxic components for the 6ChN 15/18 diesel engine. The practical significance consists in substantiating the need for an integrated approach combining optimization of injection duration with the use of particulate filters or catalytic converters.
environmental safety, diesel engine, exhaust gases, injection duration, fuel
1. Raschetnoe issledovanie parametrov dizel'nogo dvigatelya s sistemoj recirkulyacii otrabotavshih gazov / A.S. Blinov [i dr.] // Dvigatelestroenie. 2024. № 2 (296). S. 42–55.
2. Markov V.A. Sistemy avtomaticheskogo upravleniya i regulirovaniya teploenergeticheskih ustanovok i napravleniya ih sovershenstvovaniya // Vestnik Moskovskogo gosudarstvennogo tekhnicheskogo universiteta im. N.E. Baumana. Ser.: Mashinostroenie. 2025. № 1 (152). S. 142 168. DOI:https://doi.org/10.18698/0236-3941-2025-1-142-168
3. Peng Q., Rockstroh T., Hall C. The impact of fuel and injection strategy on combustion characteristics, emissions and efficiency in gasoline compression ignition operation // Fuel. 2022. Vol. 318. P. 123548. DOI:https://doi.org/10.1016/j.fuel.2022.123548
4. Boretti A. Advantages and Disadvantages of Diesel Single and Dual-Fuel Engines // Frontiers in Mechanical Engineering. 2019. Vol. 5. P. 64. DOI:https://doi.org/10.3389/fmech.2019.00064
5. Kalwar A., Singh A.P., Agarwal A.K. Experimental Study of Fuel Injection Timing and Exhaust Gas Recirculation for Combustion Control in Diethyl Ether-Diesel Blend Fuelled Tractor Engine // Fuel. 2024. Vol. 371. P. 131930. DOI:https://doi.org/10.1016/j.fuel.2024.131930
6. Investigation on the effect of the flow passage geometry of diesel injector nozzle on injection process parameters and engine performances / V. Markov [et al.] // Energy Science & Engineering. 2022. DOI:https://doi.org/10.1002/ese3.1051
7. Podkolzin P.S. Issledovaniya vliyaniya davleniya vpryska na moshchnostnye i ekologicheskie pokazateli dvigatelya «TMZ-650D» // Izvestiya Tul'skogo gosudarstvennogo universiteta. Tekhnicheskie nauki. 2021. № 12. S. 469–473.
8. Markov V.A. Tendencii sovershenstvovaniya sistem avtomaticheskogo upravleniya i regulirovaniya teploenergeticheskih ustanovok // Vestnik Moskovskogo gosudarstvennogo tekhnicheskogo universiteta im. N.E. Baumana. Ser.: Mashinostroenie. 2023. № 1 (144). S. 97–126. DOI:https://doi.org/10.18698/0236-3941-2023-1-97-126
9. Mel'bert A.A., Nguen Ch.H., Mashenskij A.V. Primenenie toplivopodayushchej apparatury s uvelichennym davleniem vpryska dlya snizheniya tekhnogennoj nagruzki na okruzhayushchuyu sredu // Traktory i sel'hozmashiny. 2022. T. 89. № 5. S. 325–331. DOI:https://doi.org/10.17816/0321-4443-108145
10. Vliyanie pokazatelej toplivopodachi na rabochij process dizelya pri dostizhenii davleniya vpryskivaniya 250 MPa / M.G. Shatrov [i dr.] // Dvigatelestroenie. 2023. № 4 (294). S. 42–55. DOI:https://doi.org/10.18698/jec.2023.4.42-55
11. Impact of pilot diesel injection timing on performance and emission characteristics of marine natural gas/diesel dual-fuel engine / X. Zhang [et al.] // Scientific Reports. 2024. Vol. 14. P. 10767. DOI:https://doi.org/10.1038/s41598-024-61672-5
12. Simpson T., Depcik C. Multiple Fuel Injection Strategies for Compression Ignition Engines // Energies. 2022. Vol. 15. № 14. P. 5214. DOI:https://doi.org/10.3390/EN15145214
13. Yang Z., Tan Q., Geng P. Combustion and Emissions Investigation on Low-Speed Two-Stroke Marine Diesel Engine with Low Sulfur Diesel Fuel // Polish Maritime Research. 2019. Vol. 26. P. 153–161. DOI:https://doi.org/10.2478/pomr-2019-0017
14. Effect of after injections on late cycle soot oxidation in a small-bore diesel engine / L. Rao [et al.] // Combustion and Flame 2018. Vol. 191. P. 513–526. DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2018.02.014
15. Dave H., Sutaria B., Patel B. An Approach to Improve Smoke-Fuel Consumption Trade-Off Under Pilot Injection Mode in a Diesel Engine // Energy, Environment, and Sustainability. 2021. P. 377–403. DOI:https://doi.org/10.1007/978-981-16-1513-9_15
16. Farhan S.M. Impact of post-injection strategies on combustion and unregulated emissions during different loads in an HSDI diesel engine / S.M. Farhan [et al.] // Fuel. 2020. Vol. 267. P. 117256. DOI:https://doi.org/10.1016/J.FUEL.2020.117256
17. Youssef A., Ibrahim A. A numerical investigation into the effect of altering compression ratio, injection timing, and injection duration on the performance of a diesel engine fuelled with diesel-biodiesel-butanol blend // Clean Energy. 2024. Vol. 8. № 5. P. 73–94. DOI:https://doi.org/10.1093/ce/zkae055
18. Fuel injection strategy optimisation and experimental performance and emissions evaluation of diesel displacement by port fuel injected methanol in a retrofitted mid-size genset engine prototype / A.K. Agarwal [et al.] // Energy. 2022. Vol. 248. P. 123593. DOI:https://doi.org/10.1016/j.energy.2022.123593
19. Correlation between Emission and Combustion Characteristics with the Compression Ratio and Fuel Injection Timing in Tribologically Optimized Diesel Engine / S. Milojević [et al.] // Tehnički vjesnik. 2022. Vol. 29. № 4. P. 1210–1219. DOI:https://doi.org/10.17559/TV-20220223164932
20. Vozmozhnost' umen'sheniya tekhnogennoj nagruzki dizel'nogo dvigatelya na okruzhayushchuyu sredu putyom izmeneniya stepeni szhatiya / A.A. Mel'bert [i dr.] // Traktory i sel'hozmashiny. 2025. T. 92. № 1. S. 5–9. DOI:https://doi.org/10.17816/0321-4443-631489
