Russian Federation
Russian Federation
Russian Federation
Russian Federation
UDK 62-621.2 Природный газ
Purpose: To identify existing problems, namely the low homogeneity of the air-fuel mixture and fuel losses when valves are closed, and the advantages of central fuel injection, namely its relative ease of adjustment and location of gas injectors, and its main differences from distributed injection. To show existing ways to solve these problems. To demonstrate the lack of environmental and economic efficiency in central fuel injection. To calculate the amount of fuel entering the engine exhaust system when the valves are closed. To show ways to increase the efficiency of fuel utilization during engine operation. Methods: Calculation of the mass of natural gas entering the engine exhaust system during the valve overlap period, considering the duration of the period, the cross-sectional area of the valve gap, the total amount of fuel supplied during the intake stroke, the density of the fuel, the flow rate when entering the cylinder and the stoichiometric ratio. Results: The need to consider the amount of fuel consumed when operating a gas engine is shown. The existing problems of using central fuel supply are indicated. A method for calculating gas fuel losses when valves are closed is formulated and justified. It has been established which parameters influence the mass of fuel that does not enter the cylinder during the intake process. It is concluded that it is necessary to use other injection methods, or to significantly improve the intake process of central injection. Practical significance: The influence of the method of supplying fuel to a gas internal combustion engine on the environmental friendliness of the engine and fuel efficiency is shown. A method has been formulated for calculating gas fuel losses during the period of valve overlap, considering the design parameters of the intake system and the duration of opening of the intake valves.
Gas engine, gas-diesel engine, natural gas, homogeneity of gas-air mixture, gas-air mixture, fuel accumulation
1. Penkin A. L. Sposob povysheniya odnorodnosti gazovozdushnoy smesi v transportnyh dvigatelyah vnutrennego sgoraniya / A. L. Penkin, S. A. Metlyakova // International Journal of Advanced Studies. - 2023. - Vol. 13. - Iss. 1. - Pp. 137-158. - DOI:https://doi.org/10.12731/2227-930X2023-13-1-137-158.
2. Patent № 2017089042 World Intellectual Property Organization, IPC F02B31/00, F02M21/02, F02M21/04, F02M35/10. “Inlet channel device”: priority data 27.11.2015: publication date 01.06.2017 / M. Kristen, R. Schmid, A. Redlich et al.; Applicant Bosch GMBH Robert. - 18 p.
3. Mahmood H. Design of Compressed Natural Gas-Air Mixer for Dual Fuel Engine Using Three-Dimensional Computational Fluid Dynamics Modeling / H. Mahmood, N. Adam, B. Sahari et al. // Journal of Computational and Theoretical Nanoscience. - 2017. - Vol. 14. - Pp. 1-18. - DOI:https://doi.org/10.1166/jctn.2017.6605.
4. Noor M. M. Development of A High Pressure Compressed Natural Gas Mixer for A 1.5 Litre CNG-Diesel Dual Engine / M. M. Noor, K. Kadirgama, R. Devarajan et al. // Paper presented at the National Conference on Design and Concurrent Engineering. - 2008. - 28-29 Oct., Melaka. - Pp. 435-438.
5. Genkin K. I. Gazovye dvigateli / K. I. Genkin. - M.: Mashinostroenie, 1977. - 193 s.
6. Lukanin V. N. Dvigateli vnutrennego sgoraniya. V 3 kn. Kn. 2. Dinamika i konstruirovanie: ucheb. / V. N. Lukanin, I. V. Alekseev, M. G. Shatrov i dr.; pod red. V. N. Lukanina. - M.: Vyssh. shk., 1995. - 319 s.
7. Hovah M. S. Avtomobil'nye dvigateli: teoriya, raschet i konstrukciya dvigateley vnutrennego sgoraniya: uchebnik dlya avtomob.-dor. tehnikumov / M. S. Hovah, G. S. Maslov. 2-e izd., pererab. i dop. - M.: Mashinostroenie, 1971. - 456 s.
8. Pat. 2008460 Rossiyskaya Federaciya, MPK F02B 31/00 (1990.01). Vpusknoy truboprovod dvigatelya vnutrennego sgoraniya / A. M. Abrashkin, E. A. Matveeva; zayav. Povolzhskiy Institut informatiki, radiotehniki i svyazi; zayavl. 26.07.1990.
9. Patent 2731558 Rossiyskaya Federaciya, MPK F02B 43/02 (2006.01), F02B 43/04 (2006.01), F02B 43/06 (2006.01), F02B 43/12 (2006.01), F02D 19/02 (2006.01), F02M 21/02 (2006.01). Sposob podachi gazovogo topliva v dvigatel' vnutrennego sgoraniya: № 2019137447: zayavl. 20.01.2019: opubl. 04.09.2020 / V. A. Shishkov.
10. Supee A. Effects of Compressed Natural Gas (CNG) Injector Position on Intake Manifold towards Diesel-CNG Dual Fuel (DDF) Engine Performance / A. Supee, R. Mohsin, Z. Majid et al. // Journal Technology (Sciences & Engineering). - 2014. - Pp. 107-115. - DOI:https://doi.org/10.11113/jt.v70.2292.
