The Potential of Gasoline Fueled Pre Chamber Ignition Combined with Elevated Compression Ratio

Stadler, Andreas; Sauerland, Henning; Härtl, Martin; Wachtmeister, Georg

doi:10.4271/2020-01-0279

Cited by 27 publications

(20 citation statements)

References 41 publications

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“…The jet ignition is a subset of the pre-chamber combustion system, which was first introduced in the late 1950s by Nikolai Semenov and further developed by Lev Ivanovich Gussak [33,34]. This concept is featured with a much smaller pre-chamber volume of 2~3% of the clearance volume, and the conventional single throat connecting the pre-chamber and the main chamber is replaced by a nozzle with multi orifices.…”

Section: Obstacles In Low-carbon Gasoline Enginesmentioning

confidence: 99%

“…Aiming at evaluating raw emissions from the passive TJI engine, Stadler et al [33] evaluated four different orifice cap configurations with varied nozzle diameter, number of nozzles, and nozzle swirl angle. Compared to the conventional SI engine, the passive TJI is featured with overall lower CO and HC emissions, which indicates more complete combustion.…”

Section: Emissions In Passive Pre-chamber Enginesmentioning

confidence: 99%

“…The results indicated that the percentage magnitude of NOx reductions with increased lambda level is nearly independent of engine speed or load, and the engine-out NOx reduction of 95%+ at ultra-lean conditions is expected. Stadler et al [33] indicated that NOx emissions can be reduced to 0.2 g/kWh with the ultra-lean operation of lambda up to 2. It is noted that the remaining NOx emissions (<40 ppm) are assumed to be mainly generated in the pre-chamber combustion, as has been established in heavy-duty pre-chamber research.…”

Section: Emissions In Active Pre-chamber Enginesmentioning

confidence: 99%

“…Stadler et al [33] evaluated the effects of the pre-chamber fuel mass flow ratio ranging from 0 to 8% on engine emissions. It is concluded that a too large pre-chamber fuel mass flow ratio leads to rich mixtures in the pre-chamber and contributes to the formation of soot.…”

Section: Emissions In Active Pre-chamber Enginesmentioning

confidence: 99%

See 3 more Smart Citations

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

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Section: Obstacles In Low-carbon Gasoline Enginesmentioning

confidence: 99%

Section: Emissions In Passive Pre-chamber Enginesmentioning

confidence: 99%

Section: Emissions In Active Pre-chamber Enginesmentioning

confidence: 99%

Section: Emissions In Active Pre-chamber Enginesmentioning

confidence: 99%

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A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

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Yuan

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“…The current research effort is focused on the active pre-chamber where auxiliary fuel is added into the prechamber. The active pre-chamber concepts are found to enhance the combustion stability and extend the lean limit to ultra-lean conditions (λ > 2.0) [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Fuel Properties on Combustion Characteristics in a Narrow-Throat Pre-Chamber Engine

Hlaing

Marquez

Burgos

et al. 2021

SAE Int. J. Adv. & Curr. Prac. in Mobility

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In this study, the authors investigated the effect of fuel properties on the combustion characteristics by employing methane, methanol, ethanol, and primary reference fuels (PRFs) as the main chamber fuel while using methane for the pre-chamber. Global excess air ratios (λ) from 1.6 to lean limit were tested, while 13% of total fuel energy supplied to the engine was delivered via the pre-chamber. The gaseous methane was injected into the pre-chamber at the gas exchange top-dead-center (TDC). Port fuel injection was tested with both open and closed inlet valves. The pre-chamber assembly was designed to fit into the diesel injector pocket of the base engine, which resulted in a narrow throat diameter of 3.3 mm. The combustion stability limit was set at 5% of the coefficient of variation of gross IMEP, and the knock intensity limit was set at 10 bar. GT-Power software was used to estimate the composition of pre-chamber species and was used in heat release analysis of the two chambers. It was found that the rich limit was controlled by engine knock. Hence a higher reactivity fuel (lower octane) had to be operated leaner. However, with the increasing reactivity, the lean limit was also extended, while the peak efficiency was also obtained with a leaner mixture. With PRF 90, the lean limit was at global-λ = 3.0, while the limit was 2.3 with methane. The alcohol fuels exhibited a different behavior from the methane and the PRFs. Ethanol has the same lean limit as PRF100, but methanol could be operated up to global-λ = 3.2. The pre-chamber combustion did not change much with the different fuels in the main chamber, so the combustion stability trends must be related to the transition from burning jets to ignition of the main chamber charge and its subsequent combustion.

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Operation strategy optimization of lean combustion using turbulent jet ignition at different engine loads

et al. 2021

View full text Add to dashboard Cite

The Potential of Gasoline Fueled Pre Chamber Ignition Combined with Elevated Compression Ratio

Cited by 27 publications

References 41 publications

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

Analysis of Fuel Properties on Combustion Characteristics in a Narrow-Throat Pre-Chamber Engine

Operation strategy optimization of lean combustion using turbulent jet ignition at different engine loads

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