Active Fuelling of a Passenger Car Sized Pre-Chamber Ignition System with Gaseous Components of Gasoline

Russwurm, Tim; Schumacher, Moritz; Wensing, Michael

doi:10.4271/2020-01-2045

Cited by 5 publications

(7 citation statements)

References 11 publications

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“…To make the sole gasoline jet ignition concept more robust and feasible over the wide speed and load domain, some other strategies are proposed. Schumacher et al [127,128] used the gasoline-vapor-air-mixture as active fueling. This gaseous mixture contains volatile fuel obtained in the fuel tank above the liquid surface.…”

Section: Thermo Engine Testmentioning

confidence: 99%

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

Zhu

Akehurst

Yuan

2022

Renewable and Sustainable Energy Reviews

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Section: Thermo Engine Testmentioning

confidence: 99%

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

Zhu

Akehurst

Yuan

2022

Renewable and Sustainable Energy Reviews

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“…This was already recognized in engine investigations and is closely related to the pre-chamber fuelling. 30 In this case, the pre-chamber is scavenged with a l = 0.8 mixture. In a lean main chamber environment, this over rich pre-chamber supports the jet ignition.…”

Section: Jet Propagation and Ignition With Real Size Pre-chambermentioning

confidence: 99%

“…The authors of this work demonstrated an increase in indicated efficiency of more than 10% compared to stoichiometric operation with less than 20 ppm NO x at l = 1.8. 10 The main disadvantages of pre-chamber ignition systems are the increased wall heat losses and challenging emission handling. It is unavoidable that the pre-chamber itself increases the surface of the combustion chamber and thus naturally increases wall heat losses.…”

Section: Introductionmentioning

confidence: 99%

“…11 However, the pre-chamber scavenging is the main parameter to influence on the pre-chamber composition with gaseous pre-chamber scavenging. 10 To get a deeper understanding of the combustion process, pre-chamber ignition systems are investigated with optical measurement techniques. Bunce et al 18 and Korb et al 19 used optical accessible engines to visualise the flame propagation in the main cylinder.…”

Section: Introductionmentioning

confidence: 99%

“…11 However, the pre-chamber scavenging is the main parameter to influence on the pre-chamber composition with gaseous pre-chamber scavenging. 10…”

Section: Introductionmentioning

confidence: 99%

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Investigations on an active pre-chamber ignition system in a combustion chamber

Russwurm

Peter

Strauß

et al. 2022

International Journal of Engine Research

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Pre-chamber ignition systems are one way to enable homogeneous lean or dilute combustion. Both strategies can significantly increase the efficiency of spark ignition engines. Spark initiated combustion in the pre-chamber produces hot gases that rapidly enter the cylinder and ignite the diluted charge at multiple points. Active ignition systems with fuel in the pre-chamber can directly influence the composition of the pre-chamber to ensure good ignition properties and sufficient ignition energy. This paper shows results from a novel test facility that enables investigations on the jet propagation of an active pre-chamber inside a constant pressure vessel. Thereby, the background mixture inside the vessel is variated between λ = 1.0 and λ = 2.0. With a special designed single-hole pre-chamber the flame propagation of a single pre-chamber jet is measured both in direction of the transfer port and perpendicular to this direction. Compared to spark ignition under equal ambient conditions (350°C, 10 bar), the pre-chamber combustion propagates around eight times faster in direction of the transfer port and 60% faster in radial direction. Until λ = 1.6, the flame propagation speed in radial direction can be kept on the level of a stoichiometric spark ignition. The simultaneous record of OH*-chemiluminescence and high-speed Schlieren imaging shows that the dominant ignition mechanism of a passenger-car sized pre-chamber is jet ignition according to the classification of Biswas. In stoichiometric cylinder conditions, a rich pre-chamber hampers the ignition in the main chamber whereas in lean operation points the scavenging of the pre-chamber with a rich λ = 0.8 mixture is beneficial. These measurements indicate how the disrupted flame front of a pre-chamber jet increases the turbulence and enhances the flame propagation. The highest recorded propagation speed occurs in stoichiometric conditions both in the pre-chamber and in the combustion module.

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Flame Luminesce in an Optically Accessible Engine with an Active Fuelled Pre-Chamber Ignition System

et al. 2021

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Active Fuelling of a Passenger Car Sized Pre-Chamber Ignition System with Gaseous Components of Gasoline

Cited by 5 publications

References 11 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

Investigations on an active pre-chamber ignition system in a combustion chamber

Flame Luminesce in an Optically Accessible Engine with an Active Fuelled Pre-Chamber Ignition System

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