Experimental Studies Aimed at Lowering the Electrical Energy Requirements of a Plasma Jet Ignition System for M100 Fuelled Engines

Gardiner, David; Mallory, Robert W.; Pucher, Greg; Todesco, Marc K.; Bardon, M. F.; Battista, V.

doi:10.4271/961989

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…Spark kernels were generated using a pulsed plasma jet igniter. This type of igniter has received considerable interest, 10,11,16,18,19 largely because of improved ignition of lean mixtures. This results from the spark kernel exiting the igniter as a small jet, which increases the penetration of the plasma and hot gases and improves the turbulent mixing 16 .…”

Section: A Spark Generationmentioning

confidence: 99%

Trajectory, Development, and Temperature of Spark Kernels Exiting into Quiescent Air (Preprint)

Kiel¹,

Blunck²

2012

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Section: A Spark Generationmentioning

confidence: 99%

Trajectory, Development, and Temperature of Spark Kernels Exiting into Quiescent Air (Preprint)

Kiel¹,

Blunck²

2012

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“…Through the use of additional circuitry, the enhanced ignition system energy discharge can be pulsed and usually spans a shorter time period while delivering more current than the standard ignition system. The enhanced ignition system replaces the standard ignition system components [8,9].…”

Section: Enhanced Ignition Systemmentioning

confidence: 99%

Modeling and cold start in alcohol-fueled engines

Markel¹,

Bailey²

1998

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Fabrication and testing of an enhanced ignition system to reduce cold-start emissions in an ethanol (E85) light-duty truck engine

Gardiner¹,

Mallory²,

Todesco³

1997

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P-2Printed on paper containing at least 50% wastepaper, including 20% postconsumer waste This report describes an experimental investigation of the potential for an enhanced ignition system to lower the cold-start emissions of a light-duty vehicle engine using fuel ethanol (commonly referred to as E85). Plasma jet ignition and conventional inductive ignition were compared for a General Motors 4-cylinder7 alcohol-compatible engine. Emission and combustion stability measurements were made over a range of &/fuel ratios and spark timing settings using a steady-state, coldidle experimental technique in which the engine coolant was maintained at 25°C to simulate cold-running conditions. These tests were aimed at identifying the degree to which calibration strategies such as mixture enleanment' and retarded spark timing could lower engine-out hydrocarbon emissions and raise exhaust temperatures, as well as determining how such calibration changes would affect the combustion stability of the engine (as quantified by the coefficient of variation, or COV, of indicated mean effective pressure calculated from successive cylinder pressure measurements).Retarding the spark timing to well after piston top dead centre was highly effective for reducing hydrocarbon emissions when used in combination with stoichiometric or slightly lean mixtures. This approach could increase exhaust temperatures by about 200°C over the usual values, which would be expected to cause the catalytic converter to "light-off (attain high oxidation efficiency) earlier than normal. The ability to use such a calibration strategy was limited with conventional ignition as engine stability would degrade excessively.At qual &/fuel ratio and spark-timing settings, plasma jet ignition provided lower COV levels and lower specific fuel consumption than conventional inductive Throughout this report, the term "enleanment" has been used to refer to calibration changes that are intended to increase the aidfuel ratio of the mixture. Enleanment is the opposite of enrichment (a term which is much more commonly used), where the aidfuel ratio is reduced to provide excess fuel for situations such as cold starting. 1 i ignition, but caused higher hydrocarbon emissions and lower exhaust temperatures.However, plasma jet ignition provided a better trade-off between decreasing hydrocarbon emissions and increasing COV levels than inductive ignition when air/fbel ratio and spark timing were optimized. For an upper COV threshold of 10% (considered to be the upper limit that might be acceptable in practice), minimum hydrocarbon mass emission flow rates with plasma jet ignition were about 13% of those using inductive ignition.ii 6. 7.8. 9. INTRODUCTIONThis report describes an experimental investigation of the potential for an enhanced ignition system to lower the cold-start emissions of a light-duty vehicle en@e using fuel ethanol. The 4-cylinder test engine was a pre-production prototype representative of future alcohol-compatible engines considered for future mass p...

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Experimental Studies Aimed at Lowering the Electrical Energy Requirements of a Plasma Jet Ignition System for M100 Fuelled Engines

Cited by 8 publications

References 31 publications

Trajectory, Development, and Temperature of Spark Kernels Exiting into Quiescent Air (Preprint)

Trajectory, Development, and Temperature of Spark Kernels Exiting into Quiescent Air (Preprint)

Modeling and cold start in alcohol-fueled engines

Fabrication and testing of an enhanced ignition system to reduce cold-start emissions in an ethanol (E85) light-duty truck engine

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