ANALYSIS OF A PRESSURE CONTROLLER FOR COMPRESSED NATURAL GAS (CNG) INJECTION SYSTEMS IN COMBUSTION ENGINES

2008 ◽  
Author(s):  
Dirk Hubner ◽  
Harald Ortwig
Keyword(s):  
Natural Gas ◽  
Combustion Engines ◽  
Compressed Natural Gas ◽  
Pressure Controller

A quasi-one-dimensional model for an outwardly opening poppet-type direct gas injector for internal combustion engines

2019 ◽  
Vol 21 (8) ◽  
pp. 1493-1519
Author(s):  
Abhishek Y Deshmukh ◽  
Carsten Giefer ◽  
Dominik Goeb ◽  
Maziar Khosravi ◽  
David van Bebber ◽  
...  
Keyword(s):  
Natural Gas ◽  
Internal Combustion Engines ◽  
Flow Model ◽  
Direct Injection ◽  
Source Model ◽  
Gas Jet ◽  
Nozzle Flow ◽  
Combustion Engines ◽  
Compressed Natural Gas ◽  
One Dimensional

Direct injection of compressed natural gas in internal combustion engines is a promising technology to achieve high indicated thermal efficiency and, at the same time, reduce harmful exhaust gas emissions using relatively low-cost fuel. However, the design and analysis of direct injection–compressed natural gas systems are challenging due to small injector geometries and high-speed gas flows including shocks and discontinuities. The injector design typically involves either a multi-hole configuration with inwardly opening needle or an outwardly opening poppet-type valve with small geometries, which make accessing the near-nozzle-flow field difficult in experiments. Therefore, predictive simulations can be helpful in the design and development processes. Simulations of the gas injection process are, however, computationally very expensive, as gas passages of the order of micrometers combined with a high Mach number compressible gas flow result in very small simulation time steps of the order of nanoseconds, increasing the overall computational wall time. With substantial differences between in-nozzle and in-cylinder length and velocity scales, simultaneous simulation of both regions becomes computationally expensive. Therefore, in this work, a quasi-one-dimensional nozzle-flow model for an outwardly opening poppet-type injector is developed. The model is validated by comparison with high-fidelity large-eddy simulation results for different nozzle pressure ratios. The quasi-one-dimensional nozzle-flow model is dynamically coupled to a three-dimensional flow solver through source terms in the governing equations, named as dynamically coupled source model. The dynamically coupled source model is then applied to a temporal gas jet evolution case and a cold flow engine case. The results show that the dynamically coupled source model can reasonably predict the gas jet behavior in both cases. All simulations using the new model led to reductions of computational wall time by a factor of 5 or higher.

scholarly journals The analysis of the potential for the use of gaseous fuels in the municipal bus transport in Poland – part 1

2012 ◽  
Vol 148 (1) ◽  
pp. 82-88
Author(s):  
Wojciech GIS ◽  
Edward MENES ◽  
Jerzy WAŚKIEWICZ
Keyword(s):  
Natural Gas ◽  
Diesel Engines ◽  
Road Transport ◽  
Current Level ◽  
Combustion Engines ◽  
Compressed Natural Gas ◽  
Gaseous Fuels ◽  
Advantages And Disadvantages ◽  
Ecological Aspects ◽  
Bus Transport

The paper discusses issues related to the use of compressed natural gas (CNG) in combustion engines particularly in municipal bus transport. The ecological aspects of the use of natural gas in road transport have been analyzed particularly the exhaust emissions in comparison to the emissions from diesel engines. Advantages and disadvantages of natural gas fueling as well as the current level of CNG use in transport have been presented both in Poland and worldwide. The authors have also indicated the motivating arguments for the use of natural gas.

scholarly journals Lean-burn CNG engine with ignition chamber: from the idea to a running engine

2019 ◽  
Vol 176 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Michael WEIßNER ◽  
Frank BEGER ◽  
Martin SCHÜTTENHELM ◽  
Gunesh TALLU
Keyword(s):  
Natural Gas ◽  
Internal Combustion Engines ◽  
State Of The Art ◽  
Combustion Engines ◽  
Lean Burn ◽  
Compressed Natural Gas ◽  
Emission Regulations ◽  
Cng Engine ◽  
Funded Project ◽  
The Eu

Current and further developing CO2- and emission regulations worldwide and the competition to full electric mobility deliver a chal-lenge for internal combustion engines in general. A state of the art solution is the use of natural gas mainly contending methane to reduce CO2 significantly and to offer lowest emission levels. The EU-funded project GasOn developed engine concepts to fully exploit the advantages of CNG. This article describes the development of an innovative, monovalent engine dedicated to Compressed Natural Gas (CNG) and characterised by the lean burn concept and the innovative pre-chamber combustion.

scholarly journals Hydrogen enriched compressed natural gas (HCNG): A futuristic fuel for internal combustion engines

2011 ◽  
Vol 15 (4) ◽  
pp. 1145-1154 ◽  
Author(s):  
Kasianantham Nanthagopal ◽  
Rayapati Subbarao ◽  
Thangavelu Elango ◽  
Ponnusamy Baskar ◽  
Kandasamy Annamalai
Keyword(s):  
Natural Gas ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Compressed Natural Gas

scholarly journals The analysis of the potential for the use of gaseous fuels in the municipal bus transit in Poland – part 2

2012 ◽  
Vol 150 (3) ◽  
pp. 17-26
Author(s):  
Wojciech GIS ◽  
Edward MENES ◽  
Jerzy WAŚKIEWICZ
Keyword(s):  
Natural Gas ◽  
Road Transport ◽  
Current Level ◽  
Combustion Engines ◽  
Compressed Natural Gas ◽  
Gaseous Fuels ◽  
Bus Transit ◽  
Advantages And Disadvantages ◽  
Ecological Aspects ◽  
Bus Transport

The paper discusses issues related to the use of compressed natural gas (CNG) in combustion engines particularly in municipal bus transport. The ecological aspects of the use of natural gas in road transport have been analyzed particularly the exhaust emissions in comparison to the emissions from diesel engines. Advantages and disadvantages of natural gas fueling as well as the current level of CNG use in transport have been presented both in Poland and worldwide. The authors have also indicated the motivating arguments for the use of natural gas.

scholarly journals Ideal cycle of combustion engine with natural gas as a fuel

2016 ◽  
Vol 62 (Special Issue) ◽  
pp. S14-S20 ◽  
Author(s):  
I. Vitázek ◽  
J. Klúčik ◽  
J. Jablonický ◽  
P. Vereš
Keyword(s):  
Natural Gas ◽  
Combustion Engine ◽  
Ideal Gas ◽  
Precise Determination ◽  
Combustion Engines ◽  
Compressed Natural Gas ◽  
Working Cycle ◽  
Residual Space ◽  
Determination Of Parameters

The aim of the paper is to present a detailed methodology of calculations of parameters of an ideal working cycle of spark-ignition combustion engine. Natural gas in the form of compressed natural gas (CNG) was used as a fuel. A theoretical ideal cycle is currently described in simplified way. The paper introduces calculations considering excess air, residual space in the cylinder of the engine and the course of properties of gases in dependence on temperature. The thermodynamics of ideal gas mixture was used. A computer program for clear, quick and accurate calculations of this relatively complicated system of relations was designed. The presented methodology of calculations broadens the scope of the theory of combustion engines and enables a precise determination of parameters of combustion engine with natural gas as a fuel.

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