Effect of fuel injection timings on performance and emissions of stratified combustion CNGDI engine

Aljamali, Saad; Abdullah, Shahrir; Mahmood, Wan Mohd Faizal Wan; Ali, Yusoff

doi:10.1016/j.applthermaleng.2016.08.127

Cited by 21 publications

(10 citation statements)

References 10 publications

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“…Higher power obtained is the results of higher pressure and higher heat release rate. In addition, a late injection timing with high pressure and suitable combustion duration increases the engine performance, and good propagation lame is obtained [15]. Furthermore, high heat released with the lean mixture produced high indicated power.…”

Section: Power and Torquementioning

confidence: 96%

Compressed Natural Gas Direct Injection: Comparison Between Homogeneous and Stratified Combustion

Abdullah¹,

Mahmood²,

Aljamali³

et al. 2017

Advances in Natural Gas Emerging Technologies

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Due to abundance of natural gas, the use of natural gas for automotive use, particularly for internal combustion engine (ICE), is more practical and cheaper than their future successors. Even though natural gas is a cleaner fuel than other fossil fuels and has a higher octane number and can lead to higher thermal eiciency, its low carbon number makes it less atractive as compared to gasoline and diesel. Based on its potential, an engine referred to as compressed natural gas direct injection engine (CNGDI) was designed, developed and tested to operate on compressed natural gas (CNG) as monofuel directly and centrally injected into the engine. Computational and experimental works have been performed to investigate the viability of the design. Computational luid dynamics (CFD) simulations and experimental works with homogenous combustion showed that the results were in good agreement. From experimental works, it is found that combustion characteristics could be improved by using a stratiied charge piston coniguration with some drawback on performance. In terms of exhaust emissions, stratiied coniguration causes slight increase in the emission of CO, CO 2 and NO x , which highlight a need for further study on this issue.

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Section: Power and Torquementioning

confidence: 96%

Compressed Natural Gas Direct Injection: Comparison Between Homogeneous and Stratified Combustion

Abdullah¹,

Mahmood²,

Aljamali³

et al. 2017

Advances in Natural Gas Emerging Technologies

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“…Methane (i.e., NG) was used as fuel. Due to the higher octane number, higher auto ignition temperature, and forming up to 96% of NG fuel, the usage of this fuel in stratified charge engines was investigated in this study. The properties of used methane in this numerical study are given in Table .…”

Section: Numerical Proceduresmentioning

confidence: 99%

“…Moreover, the NG composition has a slight effect on the formation of emissions and engine efficiency. Aljamali et al conducted an experimental study performance and emissions of stratified charge engine fueled with compressed natural gas (CNG). They investigated the effect of different injection timings on the pollutant emissions and engine performance in NG‐fueled direct injection engine.…”

Section: Introductionmentioning

confidence: 99%

Investigation of multistage injection strategies in a DISI engine fueled with methane under stratified charge lean combustion conditions

Fırat

2020

Env Prog and Sustain Energy

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A three‐dimensional numerical study has been performed to study combustion and emission of methane in a stratified charge direct injection spark ignition engines under the multistage injection strategies. Firstly, the combustion and emission characteristics of a single‐injection strategy were investigated, and then the effects of two‐stage and three‐stage injection strategies of the injected fuel on combustion and emissions were analyzed. This simulation was run from intake valve opening to exhaust valve opening under stratified charge conditions using the ANSYS Forte numerical software. The Discrete Particle Ignition Kernel Flame model was used to investigate the ignition process and also the combustion and flame propagation were simulated with the G‐equation model. The numerical results show that the multistage injection strategies achieve a significant improvement in the cylinder pressure and combustion efficiency, while reducing NOx, CO, and unburned hydrocarbon emissions compared to single‐injection strategy under stratified charge conditions. Also, the efficient multistage injection strategies enhanced the benefits of the emission reduction in the stratified lean combustion with additional increases of combustion efficient.

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“…In 7.10mm Valve Lift, best air fuel mix is observed at 4 hole injector nozzle. Saad aljamali [6] experimented CNG Engine with the effect of injection on direct injection.1.6L capacity engine, 4-cylinder SI Engine with CR=14 was used. At the end of 120 0 BTDC, injection timing was set at 4000 rpm.…”

Section: Effects Of Cng Injection Pressure On Performance Emission Amentioning

confidence: 99%

Effects of CNG Injection Pressure on Performance, Emission and Combustion Characteristics of Multi-cylinder SI Engine

Nitnaware¹,

Bhange²,

Bansod³

et al. 2019

IJRTE

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This Paper shows the effect of port fuel injection pressure of CNG in 3-cylinder SI Engine at Wide Open Throttle position using sequential port fuel injection system. All trials are performed on 4-stroke, 796 cc MPFI S.I engine at injection pressure of 2.0, 2.2, 2.4, 2.6, 2.8 bar for constant speed of 2500, 3000, 3500, 4000 & 4500 rpm. During the trial compression ratio is kept constant at 9.2 with Maximum Brake Torque (MBT) spark timing of 15 o BTDC. Optimum torque is obtained for CNG at injection pressure of 2.6 bar and 3000 rpm. Gasoline trials are performed at same compression ratio for comparison with CNG at same injection pressure. Performance and emission characteristics with combustion analysis are performed at optimum injection pressure of 2.6 bar.

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Effect of fuel injection timings on performance and emissions of stratified combustion CNGDI engine

Cited by 21 publications

References 10 publications

Compressed Natural Gas Direct Injection: Comparison Between Homogeneous and Stratified Combustion

Compressed Natural Gas Direct Injection: Comparison Between Homogeneous and Stratified Combustion

Investigation of multistage injection strategies in a DISI engine fueled with methane under stratified charge lean combustion conditions

Effects of CNG Injection Pressure on Performance, Emission and Combustion Characteristics of Multi-cylinder SI Engine

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