Homogeneous Charge Compression Ignition (HCCI) combustion: Implementation and effects on pollutants in direct injection diesel engines

Gan, Suyin; Ng, Hoon Kiat; Pang, Kar Mun

doi:10.1016/j.apenergy.2010.09.005

Cited by 222 publications

(83 citation statements)

References 59 publications

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“…This latter aspect involves several physical quantities and operative parameters, as well as different combustion strategies: one of the most advances to simultaneously reduce NO x and soot emissions while maintaining fuel consumption and engine performance is multiple injection combustion [3]. Since both particulate matter and NO x are strongly dependent on temperature and equivalence ratio, their emission can be reduced by controlling the flame temperature and the mixture formation through an optimized injection law during the compression and power strokes [4]. Figure 1 shows the regions of formation for these two pollutant emissions within an equivalence ratio-temperature map: while NO x formation happens at high flame temperature and low equivalence ratio, soot occurs in region characterized by fuel rich mixtures and moderate temperature.…”

Section: Introductionmentioning

confidence: 99%

An Insight into the Effect of Advanced Injection Strategies on Pollutant Emissions of a Heavy-Duty Diesel Engine

Meloni

Naso

2013

Energies

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An advanced numerical investigation has been carried out in order to study the effect of multiple injection strategies on Caterpillar heavy-duty diesel engine emissions. Both different injected fuel percentages for each pulse and several dwells between main and post phase were investigated via computational fluid dynamics (CFD) and large eddy simulation (LES). Two sets of simulations were taken into account for 10% and 20% exhaust gas recirculation (EGR) fractions. In the first one, the main injection was split into two identical phases, while in the second one into three pulses. Within each set, three strategies were considered, increasing the amount of fuel injected during the main and concurrently decreasing the post pulse. Overall, 48 simulations were employed, since four different dwells between the last phase of the main and post injection were considered. Results show that the pollutant emissions minimization has been obtained for the Schemes injecting 65% and 70% of fuel for both two and three split strategies, but for different values of dwell. In fact, emissions very close to each other for NO x and particulate matter have been reached for these cases. Reductions of about −30% and −71% were respectively obtained for NO x and soot in comparison with experimental emissions related to the single injection case.

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Section: Introductionmentioning

confidence: 99%

An Insight into the Effect of Advanced Injection Strategies on Pollutant Emissions of a Heavy-Duty Diesel Engine

Meloni

Naso

2013

Energies

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“…To overcome this issue, strategies are developed to control HCCI combustion which refers to the Controlled Auto Ignition (CAI) concept [2,3]. Exhaust Gas Recirculation (EGR) as a dilutant of the fresh fuel-air mixture is one of the strategies used for controlling HCCI combustion [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Firstly, the efficiency of HCCI is comparably high for the diesel engine due to the high compression ratios. Secondly, in HCCI due to the highly diluted charge, high local peak temperatures are avoided, thus reducing the NO x formation [1][2][3][4]. Furthermore, since the charge is well-mixed, soot formation is prevented [1,2,4].…”

Section: Introductionmentioning

confidence: 99%

“…Considering the limited fossil fuel resources and strict limitation of pollutant emissions, the Homogeneous Charge Compression Ignition (HCCI) engine is a promising technology as it combines advantages of both the diesel and spark ignition engines [1][2][3][4]. Firstly, the efficiency of HCCI is comparably high for the diesel engine due to the high compression ratios.…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Influences of Thermal and Mixture Inhomogeneities on the Auto-Ignition Process in a Controlled Auto-Ignition (CAI) Engine Using LES

Yildar

Kuenne

et al. 2017

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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-This work applies Large Eddy Simulation (LES) to the combustion process within a CAI engine. The chemical reaction is treated with a pre-tabulation approach based on homogeneous reactor simulations. At this juncture, a five-dimensional chemistry database is employed where the thermochemical properties are a function of the unburnt gas temperature, the air-fuel ratio, the exhaust gas ratio, the pressure, and the reaction progress variable. Statistical quantities are gathered for 20 simulated cycles and the averaged pressure curves get compared to measurements. The simulation data are then used to provide further insight into the auto-ignition process. It will be shown how thermochemical states are distributed within the cylinder and how the ignition quality depends on them. A statistical analysis is conducted to identify manifolds in the multi-dimensional scalar space along which the conditions leading to ignition evolve. Furthermore the strong influence in between consecutive cycles caused by the exhaust gas is investigated to identify the mechanism of cycle-to-cycle variations.

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“…In order to meet the increasingly stringent emission regulations, the diesel engine LTC has been widely investigated in recent years [1][2][3][4]. By controlling the fuel injection, exhaust gas recirculation (EGR) and variable geometry exhaust gas turbocharger (VGT), improving the mixing rate of air and fuel, reduction of combustion temperature and intake oxygen concentration could be achieved, which could simultaneously lower the emission of nitrogen oxides (NOx) and soot.…”

Section: Introductionmentioning

confidence: 99%

Control -Oriented Modeling and Experimental Study on Low Temperature Combustion for Diesel Engine

Fei

Zhang²,

Dong

et al. 2017

Proceedings of the 2017 2nd International Conference on Control, Automation and Artificial Intelligence (CAAI 2017)

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Abstract-Diesel low-temperature combustion (LTC) has great potential on ultra-low emissions for internal combustion engine and has been widely researched in recent years. In order to enhance the stability of diesel LTC and improve the transient performance during low temperature combustion and conventional combustion mode switching, accurate prediction of the in-cylinder combustion state in diesel engine is required, and the control strategy should be adjusted accordingly. A controloriented combustion model which consists of the dynamic model of the intake, compression, combustion, expansion and exhaust process of diesel LTC is developed basing on in-cylinder thermodynamic cycle. The model was verified and validated with experimental data. Comparison between the calculation result and the experimental data shows that in LTC combustion mode, the maximum calculation error of indicated mean effective pressure (IMEP) is -5.4%, and the maximum calculation error of crank angle for 50% burnt fuel (CA50) is 6.6%. The results prove that the state parameters of diesel engine could be predicted accurately with this model, which is fundamental for model-based control of diesel low temperature combustion.

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Homogeneous Charge Compression Ignition (HCCI) combustion: Implementation and effects on pollutants in direct injection diesel engines

Cited by 222 publications

References 59 publications

An Insight into the Effect of Advanced Injection Strategies on Pollutant Emissions of a Heavy-Duty Diesel Engine

An Insight into the Effect of Advanced Injection Strategies on Pollutant Emissions of a Heavy-Duty Diesel Engine

Understanding the Influences of Thermal and Mixture Inhomogeneities on the Auto-Ignition Process in a Controlled Auto-Ignition (CAI) Engine Using LES

Control -Oriented Modeling and Experimental Study on Low Temperature Combustion for Diesel Engine

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