The Potential of HCCI Combustion for High Efficiency and Low Emissions

Epping, Kathi; Aceves, Salvador M.; Bechtold, Richard L.; Dec, John E.

doi:10.4271/2002-01-1923

Cited by 241 publications

(118 citation statements)

References 15 publications

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“…Of particular interest are homogenous charge compression ignition (HCCI) systems as these engines are compression ignited, lean burn, and have no throttling losses, which leads to high efficiency and low NO x emissions [3]. In HCCI engines, combustion is achieved through control of the temperature, pressure, and composition of the reactant mixture, and extensive understanding of the chemical kinetics of ignition is required to develop control strategies.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a free-piston rapid compression facility for the study of high temperature combustion phenomena

Donovan

Zigler

et al. 2004

Combustion and Flame

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A free-piston rapid-compression facility (RCF) has been developed at the University of Michigan (UM) for use in studying high-temperature combustion phenomena, including gasphase combustion synthesis and homogeneous charge compression ignition systems. The facility is designed to rapidly compress a mixture of test gases in a nearly adiabatic process. A range of compression ratios, currently 16 to 37, can be obtained. The high temperatures and pressures generated by the RCF can be maintained for in excess of 50 ms, providing an order of magnitude increase in observation time over what can be obtained using shock tubes. The facility is instrumented for temperature and pressure measurements as well as optical access for use with laser and other optical diagnostics. This work describes the UM-RCF and its operation, establishes obtainable pressures and temperatures (over 1900 kPa and 970 K for predominately N 2 gas mixtures, and over 785 kPa and 2000 K for Ar gas mixtures), and demonstrates the repeatability of the UM-RCF experiments (< 3% run-to-run variability in peak pressure) for combustion studies. The experimental results for time histories of temperature and pressure are interpreted using analytical isentropic models. Comparison between the isentropic predictions and the experimental data indicate excellent agreement and support the conclusion that the core region of the test gases is nominally uniform and is compressed isentropically.2

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Section: Introductionmentioning

confidence: 99%

Demonstration of a free-piston rapid compression facility for the study of high temperature combustion phenomena

Donovan

Zigler

et al. 2004

Combustion and Flame

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“…In HCCI combustion, a homogeneous mixture of air and fuel is compressed until auto-ignition occurs near the end of the compression stroke, followed by a combustion process that is significantly faster than either CI or SI combustion [21][22][23][24]. Epping et al [25] and Christensen and Johansson [26] reported that HCCI technology, using iso-octane as a fuel, has improved engine efficiency by as much as 37% given a high compression ratio (18:1) and maintains low emissions levels. The efficiency and compression ratio are in the range of CI engines.…”

Section: Homogeneous Charge Compression Ignition Enginesmentioning

confidence: 99%

“…The ability to operate with a wide range of fuels [32][33][34]; and 3. The ability to be used in any engine configuration: automobile engines, stationary engines, heavy duty engines or small engines [25,35,36]. On the other hand, HCCI engines have some disadvantages such as high levels of unburned hydrocarbons (UHC) and carbon monoxide (CO) [29,38,39].…”

Section: Homogeneous Charge Compression Ignition Enginesmentioning

confidence: 99%

An Introduction to a Homogeneous Charge Compression Ignition Engine

Hairuddin

Wandel²,

Yusaf³

2014

J MECH ENG SCI

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“…Soot is known to form mostly at fuel-rich condition, with equivalence ratio ~ 4 or higher (Glassman, 1989), while the formation of NOx is promoted at high combustion temperature ~2,700 K (Akihama et al, 2001, Fujimoto et al, 2002. Increasingly stringent emission standards for low emission of soot and NOX demand newly advanced engine combustion (AEC) concepts such as homogeneous charge compression ignition (HCCI) (Onishi et al, 1979;Najt and Foster, 1983;Epping et al, 2002;Dec et al, 2011), partially premixed combustion (PPC) (Noehre et al, 2006), gasoline compression ignition (GCI) (Kalghatgi et al, 2006;Manente et al, 2009;Kalghatgi et al, 2010;Sellnau et al, 2012;Ciatti et al, 2013), and reactivity controlled compression ignition (Kokjohn et al, 2011). Simply speaking, these AEC concepts have a similar goal of utilizing the fuel stratification and the reactivity of the charge (fuel and air) through various approaches such as injection strategy, dilution, or fuel reactivity that can accomplish desirable combustion and emission performance.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Combustion of High Octane Fuels in a Gasoline Compression Ignition Engine

et al. 2017

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Gasoline compression ignition (GCI) has been shown as one of the advanced combustion concepts that could potentially provide a pathway to achieve cleaner and more efficient combustion engines. Fuel and air in GCI are not fully premixed compared to homogeneous charge compression ignition (HCCI), which is a completely kinetic-controlled combustion system. Therefore, the combustion phasing can be controlled by the time of injection, usually postinjection in a multiple-injection scheme, to mitigate combustion noise. Gasoline usually has longer ignition delay than diesel. The autoignition quality of gasoline can be indicated by research octane number (RON). Fuels with high octane tend to have more resistance to autoignition, hence more time for fuel-air mixing. In this study, three fuels, namely, aromatic, alkylate, and E30, with similar RON value of 98 but different hydrocarbon compositions were tested in a multicylinder engine under GCI combustion mode. Considerations of exhaust gas recirculating (EGR), start of injection, and boost were investigated to study the sensitivity of dilution, local stratification, and reactivity of the charge, respectively, for each fuel. Combustion phasing (location of 50% of fuel mass burned) was kept constant during the experiments. This provides similar thermodynamic conditions to study the effect of fuels on emissions. Emission characteristics at different levels of EGR and lambda were revealed for all fuels with E30 having the lowest filter smoke number and was also most sensitive to the change in dilution. Reasonably low combustion noise (<90 dB) and stable combustion (coefficient of variance of indicated mean effective pressure <3%) were maintained during the experiments. The second part of this article contains visualization of the combustion process obtained from endoscope imaging for each fuel at selected conditions. Soot radiation signal from GCI combustion were strong during late injection and also more intense at low EGR conditions. Soot/temperature profiles indicated only the high-temperature combustion period, while cylinder pressure-based heat release rate showed a two-stage combustion phenomenon.

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The Potential of HCCI Combustion for High Efficiency and Low Emissions

Cited by 241 publications

References 15 publications

Demonstration of a free-piston rapid compression facility for the study of high temperature combustion phenomena

Demonstration of a free-piston rapid compression facility for the study of high temperature combustion phenomena

An Introduction to a Homogeneous Charge Compression Ignition Engine

Low-Temperature Combustion of High Octane Fuels in a Gasoline Compression Ignition Engine

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