Experimental study on the spray and combustion characteristics of SIDI CNG

Liu, Y.; Hwang, Seong-Ill; Yeom, Junho; Chung, Sung-Sik

doi:10.1007/s12239-014-0037-3

Cited by 24 publications

(7 citation statements)

References 10 publications

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“…[9][10][11][12] Good results in terms of the engine performance improvement and at the same time of emissions reduction can be obtained by the DI of compressed natural gas (CNG), which is widely used in SI engines because of its physical and chemical properties such as high knocking resistance. [13][14][15][16][17][18] Karim and Wierzba 13 investigated the use of methane in SI engine. Rousseau et al 14 and Choi et al 15 analyzed the problematics concerning the lean burning of the CNG.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the lean burn could significantly decrease NOx emissions even if CO and HC emissions under lean-burn conditions are dependent on the fuel injection timing. The DI of CNG was analyzed by Choi and colleagues [15][16][17] and Liu et al, 18 whose studies evidenced the importance of the injection development on combustion process. Moreover, in DISI fueled with CNG, the brake thermal efficiency can be improved slightly.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the compressed natural gas direct injection in a small research spark ignition engine

Catapano

Iorio

Sementa

et al. 2017

International Journal of Engine Research

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The permanent aim of the automotive industry is the further improvement of the engine efficiency and the simultaneous pollutant emissions reduction. In order to optimize the small internal combustion engines, it is necessary to further improve the basic knowledge of the thermo-fluid dynamic phenomena occurring during the combustion process. In this context, the application of optical diagnostic techniques permits a deep insight into the fundamental processes such as flow development, fuel injection, and combustion process. The aim of this study was the optimization of the compressed natural gas direct injection by means of the analysis of the injection phase and combustion process. This analysis allowed the improvement of the engine efficiency in lean-burn operation condition too. The investigation was carried out in an optically accessible small direct injection spark ignition single-cylinder engine. Two different injectors were tested. The first one was the injector designed according to the results of model simulation, and the second one was a modified prototype obtained using the findings of the optical analysis carried out in the combustion chamber. The characteristic parameters of the gaseous fuel jet were evaluated through an image processing procedure. The fuel rail was modified in order to allow the injection of seeding particles into the gaseous fuel. The gas jet was analyzed using a white light source coupled with a high spatial and temporal resolution fast camera. The combustion process development was investigated for same engine operative condition performing a cycle-resolved visualization of the flame. Moreover, this methodology permitted the evaluation of motion field and turbulence during the injection process directly into the combustion chamber. The results of investigation evidenced that the modification of the injector, designed according to the optical analysis made in the optically accessible engine, allowed an optimization of compressed natural gas direct injection resulting in improved combustion and emissions reduction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of the compressed natural gas direct injection in a small research spark ignition engine

Catapano

Iorio

Sementa

et al. 2017

International Journal of Engine Research

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“…DI technology strongly increases the engine volumetric efficiency, which permits the engine to run at a higher speed and produce more overall power [3]. DI technology also allows a decrease in the need for throttle valves, thus reducing the cycle pumping loss [4]. DI engines operate with a stratified charge which permits extremely lean combustion without high cycle-by-cycle variations and with high combustion efficiency [5,6].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on spray and combustion characteristics of LPG for application in direct-injection

et al. 2016

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As an alternative fuel that can be used in SI engines, LPG is a clean fuel with larger H/C ratio compared to gasoline, low CO 2 emission, and small amount of pollutants such as sulfur compounds. In the Spark-ignition (SI) engine, Direct injection (DI) technology can significantly increase the engine volumetric efficiency and decrease the need for a throttle valve. DI allows engine operation with the stratified charge, which enables a relatively higher combustion efficiency. Stratified charge can be supplied to nearby spark plugs to allow for overall lean combustion, which improves thermal efficiency and can cope with problems regarding emission regulations. In this study, a visualization experiment system that consists of visualization combustion chamber, air supply control system, emission control system, LPG fuel supply system, electronic control system and image data acquisition system was designed and manufactured. For all cases for which ignition was successful, flame propagation image was digitally recorded using ICCD camera, and the recorded flame propagation characteristics were examined. This study, in its results, is expected to make a contribution in terms of important data for the design and optimization of a Spark-ignited direct injection (SIDI) LPG engine.

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“…Existing research reveals that the combustion process of CNG engine [9] is determined by the combustion boundary conditions, which mean that proper control to it can help to solve the combustion and emission problems [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Application of Radical Basis Function Neural Networks to Compressed Natural Gas Engine

Wang¹,

Gan²

2016

IJCA

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Experimental study on the spray and combustion characteristics of SIDI CNG

Cited by 24 publications

References 10 publications

Optimization of the compressed natural gas direct injection in a small research spark ignition engine

Optimization of the compressed natural gas direct injection in a small research spark ignition engine

An experimental study on spray and combustion characteristics of LPG for application in direct-injection

Investigation on the Application of Radical Basis Function Neural Networks to Compressed Natural Gas Engine

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