Advanced Plasma Ignition (API): A Simple Corona and Spark Ignition System

The efficiency improvement and emissions reduction potential of lean and exhaust gas recirculation (EGR)-dilute operation of spark-ignition gasoline engines is well understood and documented. However, dilute operation is generally limited by deteriorating combustion stability with increasing inert gas levels. The combustion stability decreases due to reduced mixture flame speeds resulting in significantly increased combustion initiation periods and burn durations. A study was designed and executed to evaluate the potential to extend lean and EGR-dilute limits using a low-energy transient plasma ignition system. The low-energy transient plasma was generated by nanosecond pulses and its performance compared to a conventional transistorized coil ignition (TCI) system operated on an automotive, gasoline direct-injection (GDI) single-cylinder research engine. The experimental assessment was focused on steady-state experiments at the part load condition of 1500 rpm 5.6 bar indicated mean effective pressure (IMEP), where dilution tolerance is particularly critical to improving efficiency and emission performance. Experimental results suggest that the energy delivery process of the low-energy transient plasma ignition system significantly improves part load dilution tolerance by reducing the early flame development period. Statistical analysis of relevant combustion metrics was performed in order to further investigate the effects of the advanced ignition system on combustion stability. Results confirm that at select operating conditions EGR tolerance and lean limit could be improved by as much as 20% (from 22.7 to 27.1% EGR) and nearly 10% (from λ = 1.55 to 1.7) with the low-energy transient plasma ignition system.

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Laser Ignition of Natural Gas Engines Using Fiber Delivery

ASME 2005 Internal Combustion Engine Division Fall Technical Conference (ICEF2005) ◽

10.1115/icef2005-1336 ◽

2005 ◽

Cited By ~ 6

Author(s):

Azer P. Yalin ◽

Morgan W. Defoort ◽

Sachin Joshi ◽

Daniel Olsen ◽

Bryan Willson ◽

...

Keyword(s):

Natural Gas ◽

Past Research ◽

Spark Ignition ◽

Laser Source ◽

Laser Ignition ◽

Ignition System ◽

Gas Engine ◽

Natural Gas Engines ◽

Natural Gas Engine ◽

Design Concepts

A practical impediment to implementation of laser ignition systems has been the open-path beam delivery used in past research. In this contribution, we present the development and implementation of a fiber-optically delivery laser spark ignition system. To our knowledge, the work represents the first demonstration of fiber coupled laser ignition (using a remote laser source) of a natural gas engine. A Nd:YAG laser is used as the energy source and a coated hollow fiber is used for beam energy delivery. The system was implemented on a single-cylinder of a Waukesha VGF 18 turbo charged natural gas engine and yielded consistent and reliable ignition. In addition to presenting the design and testing of the fiber delivered laser ignition system, we present initial design concepts for a multiplexer to ignite multiple cylinders using a single laser source, and integrated optical diagnostic approaches to monitor the spark ignition and combustion performance.

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Development of a Multi-Spark Ignition System for Reducing Fuel Consumption and Exhaust Emissions of a High Performance GDI Engine

10.4271/2011-01-1419 ◽

2011 ◽

Cited By ~ 16

Author(s):

Nicolo Cavina ◽

Enrico Corti ◽

Luca Poggio ◽

Daniele Zecchetti

Keyword(s):

Fuel Consumption ◽

High Performance ◽

Exhaust Emissions ◽

Spark Ignition ◽

Ignition System ◽

Gdi Engine

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The impact of ignition system damage on the emission of toxic substances in a spark-ignition internal combustion engine

Combustion Engines ◽

10.19206/ce-2019-414 ◽

2019 ◽

Vol 179 (4) ◽

pp. 86-92

Author(s):

Mieczysław DZIUBIŃSKI ◽

Ewa SIEMIONEK ◽

Artur DROZD ◽

Michał ŚCIRKA ◽

Adam KISZCZAK ◽

...

Keyword(s):

Internal Combustion Engine ◽

Combustion Engine ◽

Internal Combustion ◽

Spark Ignition ◽

Operating Conditions ◽

Spark Ignition Engine ◽

Exhaust Gas ◽

Toxic Substances ◽

Ignition System ◽

The Impact

The article discusses the impact of ignition system damage on the emission of toxic subcategories in a spark-ignition internal combustion engine. The aim of the work was to develop an analytical model of ignition system diagnostics, test performance and comparative analysis of the results of simulations and experiments. The model developed allows to analyse the basic parameters of the ignition system affecting the content of toxic substances in the exhaust. Experimental tests were carried out using the MAHA MGT5 exhaust gas analyser for four different combustion engines fueled with petrol at various operating conditions. During the tests, the content of toxic substances in the exhaust gas of a properly working engine and the engine working with damage to the ignition system were registered. The tests will be used to assess the impact of the damage of the spark-ignition engine on the emission of individual components of toxic fumes.

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