Analysis of Scavenged Pre-Chamber for Light Duty Truck Gas Engine

Syrovatka, Zbynek; Takáts, Michal; Vávra, Jiří

doi:10.4271/2017-24-0095

Cited by 4 publications

(8 citation statements)

References 15 publications

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“…The most important results in terms of LES 3-D CFD for the case of gas (SI) ICE equipped with scavenged pre-chamber are presented in this section. It is based on data/results published in [19,[21][22][23]. The simulated data are compared with experimental/reference ones -the reference data correspond to calibrated 0-D/1-D model created in SW tool [26].…”

Section: Results Related To the Engine Amentioning

confidence: 99%

“…Cyclic variation is mainly dominated by the turbulent flame jet development -this also includes its timing, which is slightly different among the cycles due to different pre-chamber combustion duration. Table 3); top row subfigures correspond to initial phase of combustion, every sub-figures represents an increase in time domain by 2 degCA (starting top left and moving to the right); more details could be found in [19,21,23].…”

Section: Results Related To the Engine Amentioning

confidence: 99%

“…[6,7]. More detailed information about the Engine A can be found in [18,19]. The range of operating conditions related to data presented in the paper of the Engine A are summarized in Table 3.…”

Section: Commputed Casesmentioning

confidence: 99%

“…On the other hand, the very lean operation (subfigures on the right side of Figure 3) is correct in only qualitatively -the reason is the fact that all the fuel is burned (in CFD calculation) while it is not the case for the target engine. More information can be found in [18,19,[21][22][23].…”

Section: Model Calibrationmentioning

confidence: 99%

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Application of Advanced Combustion Models in Internal Combustion Engines Based on 3-D CFD Les Approach

et al. 2021

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This paper deals with the application of advanced simulation techniques for combustion modeling in the case of an internal combustion engine. The main focus is put on models with a high predictive ability hence 3-D CFD was selected while using LES (turbulence model) and detailed chemistry (both SI and CI ICE) or turbulent flame propagation (SI ICE). Both engine types are considered – spark ignited ICE and a compression ignited engine. Examples are shown and comparison with available experimental data is presented. The main conclusion is that such models are capable of high quality predictions while very little tuning is needed. This is desired as such models could be applied in the early phases of ICE development. On the other hand, such calculations are very demanding in terms of computational power.

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Section: Results Related To the Engine Amentioning

confidence: 99%

Section: Results Related To the Engine Amentioning

confidence: 99%

Section: Commputed Casesmentioning

confidence: 99%

Section: Model Calibrationmentioning

confidence: 99%

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Application of Advanced Combustion Models in Internal Combustion Engines Based on 3-D CFD Les Approach

et al. 2021

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“…The measured data can also help validate CFD simulations that predict the lambda distribution within the pre-chamber. The computational fluid dynamics simulation of the AFR in the prechamber is a common development tool to compare different designs [22,23].…”

Section: Introductionmentioning

confidence: 99%

Measurement of the air-to-fuel ratio inside a passive pre-chamber of a fired spark-ignition engine

Wippermann

Thiele

Toedter

et al. 2020

Automot. Engine Technol.

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This paper investigates the local air-to-fuel ratio measurement within the pre-chamber of a spark-ignition engine by determining the absorption of light from hydrocarbons using an infrared sensor. The measurement was performed during fired and motored engine operation points and compared to the more common exhaust lambda measurements. The experiment provided data to compare the mixture preparation in a hot and cold environment of pre-chamber and main combustion chamber. The experiment also gives an indication regarding the possible use of a pre-chamber sensor in a motored engine at higher boost pressures and fuel mass flows, operation points that would overheat the sensor in a fired engine. The work also includes the analysis of the fuel delivery into the pre-chamber of a direct and indirect injection engine. Furthermore, pressure and temperature measurement within the pre-chamber provides information about the critical sensor environment and helps to understand the gas exchange between the two volumes.

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The scavenging timing of pre-chamber on the performance of a natural gas engine

Xue

Yong

Wang

2020

International Journal of Engine Research

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The pre-chamber ignition system scavenged with natural gas can effectively improve the in-cylinder combustion process and extend the lean-burn limit of natural gas engines. The scavenging process affects the flow field and fuel-air mixture concentration distribution in the pre-chamber and affects the combustion process in the pre-chamber as well as the ignition process in the main chamber. This has a significant influence on the performance of natural gas engines. It is supposed that the ratio of natural gas remaining in the mixture inside the pre-chamber at the ignition timing affects the combustion process in the pre-chamber. To verify this suppose, an independent injection system for injecting natural gas into the pre-chamber is designed and experiments are carried out on a single-cylinder natural gas engine. The ratio of natural gas remaining in the mixture inside the pre-chamber at the ignition timing is adjusted by changing the injection start angle of the scavenging process. The combustion process in the pre-chamber and the main chamber are analyzed using the in-cylinder pressures. The results indicate that, with the delay of the injection start angle, the ratio of natural gas remaining in the mixture inside the pre-chamber at the ignition timing increases, the combustion process in the pre-chamber is enhanced, the maximum pressure difference between two chambers increases and appears earlier. The energy of the hot jets and the penetration of the jets increase, which enhances the combustion process in the main chamber.

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Analysis of Scavenged Pre-Chamber for Light Duty Truck Gas Engine

Cited by 4 publications

References 15 publications

Application of Advanced Combustion Models in Internal Combustion Engines Based on 3-D CFD Les Approach

Application of Advanced Combustion Models in Internal Combustion Engines Based on 3-D CFD Les Approach

Measurement of the air-to-fuel ratio inside a passive pre-chamber of a fired spark-ignition engine

The scavenging timing of pre-chamber on the performance of a natural gas engine

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