Effect of diesel injection strategies on natural gas/diesel RCCI combustion characteristics in a light duty diesel engine

Poorghasemi, Kamran; Saray, Rahim Khoshbakhti; Ansari, Ehsan; Irdmousa, Behrouz Khoshbakht; Shahbakhti, Mehdi; Naber, Jeff

doi:10.1016/j.apenergy.2017.05.011

Cited by 177 publications

(52 citation statements)

References 30 publications

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“…In the case of the third approach we have works such as Rao [26], which measures the effect of post-injections on emissions in small diesel engines with optical exams to experimental designs or the work of Seoksu Moon [27] who opts for the use of x-rays to discover how the injector needle affects the flow through each orifice of the injector in single hole, 3-hole, and 6-hole injectors. In the fourth approach we find works such as Poorghasemi [28], which achieves a model that simulates 3D combustion and predicts emissions for direct injection (DI) and the controlled compression ignition method (RCCI) or Dezhi work Zhou [29] that studies the effect of injection timing on the start injection rate on emissions and combustion characteristics in a direct injection compression engine (DICI). Yu [30] that follows a multiphase model large eddy simulation-volume of fluid (LES-VOF) or the work of Fuying Xue [31] that opts for a homogeneous flow approach and fluid volume method to analyze the flow in each orifice in an asymmetric injection nozzle using a liquid-gas phase flow model.…”

Section: Discussionmentioning

confidence: 99%

Injection systems in diesel engines and their theoretical-experimental study: a review

Duarte¹,

Orozco²,

Caicedo³

2018

ces

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The injection systems have had a strong evolution in recent years, going from lowpressure system of a mechanical drive to complex high-pressure electronic systems. The electronics applied to this type of systems has allowed handling sequential injections and increasing the injection pressure. In the present work a review of the evolution of the injection systems in the last 20 years is made and how techniques have been developed to model the hydrodynamic behavior of the injectors in Diesel internal combustion engines. With this review, the trends for the modeling of the injection process are visualized, which has an important impact on the thermodynamic modeling and the prediction of the indicator parameters in Diesel internal combustion engines. This review allows to visualize the future development of this type of systems and the implications they have on the performance of internal combustion engines and the thermodynamic modeling of them. The optimization in the operation of diesel engines is possible by improving the operation of injection systems, which has led to more powerful engines but smaller.

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Section: Discussionmentioning

confidence: 99%

Injection systems in diesel engines and their theoretical-experimental study: a review

Duarte¹,

Orozco²,

Caicedo³

2018

ces

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“…Studies have shown that due to the air delay in two-stage series turbocharging diesel, the constant opening of the EGR valve leads to overshooting of the EGR rate in the middle and late stages of the transition process [34]. In order to solve the problem of NOx emissions, this section sets different EGR valve states (pre-open, mid-close, and post-open) for different stages of the transient process.…”

Section: Effect Of Egr Valve Open Loop Control Strategy On Diesel Tramentioning

confidence: 99%

Effect of EGR and Fuel Injection Strategies on the Heavy-Duty Diesel Engine Emission Performance under Transient Operation

et al. 2020

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To reduce the smoke and nitrogen oxide (NOx) emissions; a detailed study concerned with exhaust gas recirculation (EGR) and diesel injection strategy was conducted on a two-stage series turbocharging diesel engine under transient operating condition. One transient process based on the constant speed of 1650 r/min and load increases linearly from 10% to 100% within 5 s was tested in this study. The effect of the EGR valve control strategy on engine transient performance was examined. The results show that better air-fuel mixing quality can be obtained with the optimized the EGR valve open loop control strategy and the smoke opacity peak decreased more than 64%. Under the EGR valve close loop control strategy; the smoke opacity peak was lower than with open loop control strategy; but higher than without EGR. The effect of fuel injection strategy on engine transient performance was examined with the EGR valve close loop control. The results show that sectional-stage rail pressure (SSRP) strategy (increasing injection pressure from a turning point load to 100% load) and optimizing fuel injection timing can improve the engine emission performance. The satisfactory results can be obtained with lower NOx (382 ppm) emissions and the smoke opacity peak (3.8%), when the turning point load is set to 60% with the injection timing delay 6° CA.

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“…The significantly large proven reserves of natural gas (200 trillion cubic meters worldwide) combined with the capability to operate a cleaner and more efficient cycle make it an attractive alternative fuel [5]. The use of natural gas as a standalone fuel, or as a blend with diesel or hydrogen, has been extensively studied in traditional spark ignition engines [6][7][8][9] and more advanced cycles such as homogeneous charge compression ignition (HCCI) [10][11][12][13][14] and reactivity controlled compression ignition (RCCI) [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Implementing Natural Gas in a Compression Ignition Cycle Using Noble Gas Addition

Shahsavan¹,

Morovatiyan²,

Baghirzade³

et al. 2019

Preprint

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Natural gas is known as a relatively clean fossil fuel due to its low carbon to hydrogen ratio compared to other transportation fuels, which yields a reduction of carbon monoxide, carbon dioxide, and unburned hydrocarbons emissions. However, it has a low cetane number, which makes it a difficult fuel for use in compression ignition engines. A potential solution for this issue can be adding small amounts of argon, as a noble gas with a low specific heat to modify the intake conditions. In this numerical study, a commercial compression ignition engine has been modeled to evaluate the auto-ignition of natural gas with the modified intake conditions. Different amounts of argon added to the intake air are examined in order to attain the optimal operating conditions. A detailed chemistry solver is implemented on a 53-species chemical kinetics mechanism to calculate the rate constants. The results show that compression ignition of natural gas can be achieved by adding small amounts of argon to the intake air. It drastically increases the in-cylinder temperature and pressure near TDC, which enables the auto-ignition of the injected natural gas. Moreover, it leads to the reduction in ignition delay and heat release rate, and expands the combustion duration. Emissions analysis indicates that NOx and CO2 can be significantly diminished by increasing the amount of argon in the intake composition. This study introduces an efficient and clean compression ignition engine fueled with natural gas running in optimal operating conditions using argon addition to the intake.

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Effect of diesel injection strategies on natural gas/diesel RCCI combustion characteristics in a light duty diesel engine

Cited by 177 publications

References 30 publications

Injection systems in diesel engines and their theoretical-experimental study: a review

Injection systems in diesel engines and their theoretical-experimental study: a review

Effect of EGR and Fuel Injection Strategies on the Heavy-Duty Diesel Engine Emission Performance under Transient Operation

Implementing Natural Gas in a Compression Ignition Cycle Using Noble Gas Addition

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