An Experimental Investigation of PCCI-DI Combustion and Emissions in a Heavy-Duty Diesel Engine

Simescu, Stefan; Fiveland, Scott B.; Dodge, Lee G.

doi:10.4271/2003-01-0345

Cited by 59 publications

(40 citation statements)

References 18 publications

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“…(12) is allowed to vary with manual settings for T * Ξ , σ , p high , p low , a and n. Finally, the constraints on T * Ξ , σ , p high , p low , and a are relaxed and the expressions are iterated to observably consistent formulations (meaning the correlated functions for α, β, γ , and λ are similar to, and within the bounds of those observed in Figs. [2][3][4][5]. Approximately 10-15 LM steps are needed for each data set, where iterations have been conducted to converge on reasonable values for the manually selected terms.…”

Section: Comparison Of Experiments and Mechanismmentioning

confidence: 99%

“…ignition (PCCI), modulated kinetics (MK) and the uniform bulky combustion system (UNIBUS), to name a few [1][2][3][4][5]; others continue to be proposed and explored. Common themes for these alternatives are reduced peak cylinder temperatures (e.g., 1600-1800 K) and control of local fuel/oxidant/diluent compositions so that NOx and soot production can be simultaneously mitigated.…”

Section: Introductionmentioning

confidence: 99%

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A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region

Goldsborough

2009

Combustion and Flame

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Section: Comparison Of Experiments and Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region

Goldsborough

2009

Combustion and Flame

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“…The locally lean nature of the mixture results in negligible soot emissions and ultra-low NOx emissions due to the low flame temperatures. Typically, two distinct stages are present in the combustion with HCCI operation, the first stage is associated with the initial rupture of the long carbon chains, often referred to as cool combustion or low temperature oxidation [10]. This initiates the active radicals, which trigger the main combustion, also referred to as the high temperature oxidation.…”

Section: Introductionmentioning

confidence: 99%

The effect of compression ratio on exhaust emissions from a PCCI diesel engine

Laguitton¹,

Crua²,

Cowell³

et al. 2007

Energy Conversion and Management

118

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A description of the development of a single cylinder test facility is presented, being based on a production 4-cylinder DI Diesel engine and designed to allow study of the emissions characteristics over a very wide range of operating conditions. The objective was to establish how engine out NO x emissions can be reduced to the estimated levels required by the next emissions target "Euro 6" and thus be able to apply the findings to the original 4-cylinder engine and minimise the requirement for currently immature NOx after treatment. It has been proposed that further reduction in compression ratio beyond current levels would be beneficial to engine out emissions and specific power, and could be facilitated by developments in cold start technology. The results of a study using this single cylinder facility to evaluate the effect of reducing compression ratio from 18.4 to 16.0 are presented. It was found that, although there was a small CO and HC penalty, either reducing the compression ratio or retarding the injection timing greatly reduced NOx and soot emissions when both premixed and diffusion-combustion phases were present. This effect was less significant when the combustion was solely premixed.

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“…There are two typical stages in HCCI combustion. The first stage is called the cold combustion or low-temperature oxidation reaction [12] when the long carbon chains begin to break. The second stage is the succeeding main combustion which is called the high temperature oxidation reaction.…”

Section: Introductionmentioning

confidence: 99%

Study on Premixed Combustion in a Diesel Engine with Ultra‐multihole Nozzle

Miao

Gao

et al. 2011

Journal of Combustion

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This study proposed a new low-temperature premixed combustion mode to achieve the simultaneous reduction of NO x and soot emissions in a volume production diesel engine of CA6DF by reconstructing key systems. Some developments of this diesel engine are as follows. A straight port and large diameter combustion chamber of a low compression ratio was developed. Inlet ports of a high induction swirl ratio were developed. A cooled EGR was developed. Especially, an ultra-multihole (UMH) nozzle was developed. It has two layers of injection holes and a large flow area. Two sprays of the upper and under layers meet in the space of the combustion chamber. The results showed that the operation range of this diesel engine to achieve the better lowtemperature premixed combustion is as follows. The speed can cover from the idle speed to the rated speed. The load can reach to 50% of the full load of the corresponding external characteristics speed. The NO x and soot emissions of this operation range are simultaneously largely reduced, even by 80%-90% at most test cases, while keeping the brake-specific fuel consumption (BSFC) from being significantly deteriorated.

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An Experimental Investigation of PCCI-DI Combustion and Emissions in a Heavy-Duty Diesel Engine

Cited by 59 publications

References 18 publications

A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region

A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region

The effect of compression ratio on exhaust emissions from a PCCI diesel engine

Study on Premixed Combustion in a Diesel Engine with Ultra‐multihole Nozzle

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