An Experimental Study of Different Effects of EGR Rates on The Performance And Exhaust Emissions of The Stratified Charge Piston Direct Injection Compressed Natural Gas Engine

2011 ◽  
Vol 11 (9) ◽  
pp. 1479-1490 ◽  
Author(s):  
Saheed O. Wasiu ◽  
Shaharin A. Sulaiman ◽  
A. Rashid A. Aziz
Keyword(s):  
Experimental Study ◽  
Natural Gas ◽  
Direct Injection ◽  
Exhaust Emissions ◽  
Compressed Natural Gas ◽  
Stratified Charge ◽  
Gas Engine ◽  
Natural Gas Engine

Experimental Test of a New Compressed Natural Gas Engine with Direct Injection

2009 ◽  
Author(s):  
M. A. Kalam ◽  
H. H. Masjuki ◽  
T. M. I. Mahlia ◽  
M. A. Fuad ◽  
Ku Halim ◽  
...  
Keyword(s):  
Natural Gas ◽  
Experimental Test ◽  
Direct Injection ◽  
Compressed Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine

The Combustion and Performance of a Converted Direct Injection Compressed Natural Gas Engine using Spark Plug Fuel Injector

2010 ◽  
Author(s):  
Taib Iskandar Mohamad ◽  
Ali Yusoff ◽  
Shahrir Abdullah ◽  
Mark Jermy ◽  
Matthew Harrison ◽  
...  
Keyword(s):  
Natural Gas ◽  
Direct Injection ◽  
Fuel Injector ◽  
Compressed Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Spark Plug ◽  
And Performance

Experimental study on the gas jet characteristics of a diesel-piloted direct-injection natural gas engine

2021 ◽  
Vol 35 (3) ◽  
pp. 1279-1288
Author(s):  
Peng Jiang ◽  
Xu Liu ◽  
Lixuan Cao ◽  
Qian Wang ◽  
Zhixia He
Keyword(s):  
Experimental Study ◽  
Natural Gas ◽  
Direct Injection ◽  
Gas Jet ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Jet Characteristics

Effects of Engine Operating Parameters on Lean Combustion Limit of Hydrogen Enhanced Natural Gas Engine

2011 ◽  
Vol 383-390 ◽  
pp. 6116-6121
Author(s):  
Xin Wang ◽  
Hong Guang Zhang ◽  
Yan Lei ◽  
Xiao Lei Bai ◽  
Xiao Na Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Natural Gas ◽  
Engine Speed ◽  
Operating Parameters ◽  
Ignition Timing ◽  
Compressed Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Lean Combustion ◽  
Combustion Limit

An experimental study was conducted on a S.I. engine fueled by compressed natural gas and hydrogen blends (HCNG), in order to test different engine operating parameters that affect lean combustion limit (L.C.L) of HCNG engine. Firstly, constant ignition timing and ignition timing under maximum L.C.L (L.L.T) conditions were compared, then L.L.T conditions were adopted in this paper. The results indicated that for each condition, neither over-retarded nor over-advanced ignition timing are advised in order to achieve leaner combustion. L.C.L increases with hydrogen fraction in the blends, and slightly increases with throttle opening, while decreases when the engine speed is raised

Compressed-natural-gas optimised downsized demonstrator engine

2017 ◽  
Vol 232 (1) ◽  
pp. 75-89 ◽  
Author(s):  
Jonathan Hall ◽  
Benjamin Hibberd ◽  
Simon Streng ◽  
Michael Bassett
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Fuel Consumption ◽  
Carbon Dioxide Emissions ◽  
Alternative Fuels ◽  
Direct Injection ◽  
Driving Performance ◽  
Compressed Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine

The complexity of modern powertrain development is demonstrated by the combination of requirements to meet future emission regulations and test procedures such as the real driving emissions, the reductions in the fuel consumption and the carbon dioxide emissions as well as the expectations of customers that there must be a good driving performance. Gasoline engine downsizing is already established as a proved technology to reduce the carbon dioxide emissions of automotive fleets. Additionally, alternative fuels such as natural gas offer the potential to reduce significantly both the tailpipe carbon dioxide emissions and the other regulated exhaust gas emissions without compromising the driving performance and the driving range. This paper presents results showing how the positive fuel properties of natural gas can be fully utilised in a heavily downsized engine. The engine was modified to cope with the significantly higher mechanical and thermal loads when operating at high specific outputs on compressed natural gas. In this study, peak cylinder pressures of up to 180 bar and specific power output levels of 110 kW/l were realised. It is also shown that having cylinder components specific to natural gas can yield significant reductions in the fuel consumption and, in conjunction with a variable-geometry turbine, a port-fuelled compressed-natural-gas engine can achieve a impressive low-speed torque (a brake mean effective power of 2700 kPa at 1500 r/min) and good transient response characteristics. The results achieved from the test engine while operating on compressed natural gas are compared with measurements from the baseline gasoline-fuelled direct-injection engine. In addition, a comparison between port fuel injection and direct injection of compressed natural gas is presented. This also includes an investigation into the specific performance challenges presented by port-fuel-injected compressed natural gas. The potential carbon dioxide savings offered by this heavily downsized compressed-natural-gas engine, of up to 50% at peak power and 20–40% for the driving-cycle region (including real-driving-emissions testing), are presented and discussed.

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