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Calorimetry of Ignition Sparks
SAE Technical Paper Series, 1988The thermal energy transferred to noncombusting gases by a spark at pressures from 1 to 7 atmospheres was measured using a pressure-rise calorimeter. The energy transfer efficiency (from electrical to thermal energy) was determined for conventional coil ignition systems, a plasma jet ignitor, and an ultra-short pulse (USP ...
Richard E. Teets, Jeffrey A. Sell
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Computationally efficient prediction of cycle-to-cycle variations in spark-ignition engines
International Journal of Engine Research, 2020Cycle-to-cycle variations are important to consider in the development of spark-ignition engines to further increase fuel conversion efficiency. Direct numerical simulation and large eddy simulation can predict the stochastics of flows and therefore ...
Corinna Netzer +4 more
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An investigation of the ignition of a gas by an electric spark [PDF]
British Journal of Applied Physics, 1959 By using flashes of microsecond duration it has been possible to obtain a series of shadowgrams showing the development of steadily propagating flames. About 100μs must elapse before any difference can be detected between the flame kernels which will propagate and those which subsequently degenerate.
E R Wooding, D R Lintin
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The Prediction of Auto Ignition in a Spark-Ignited Engine
SAE Technical Paper Series, 1984A constant volume combustion simulation has been used to compute the ignition delays of pure fuels and binary fuel mixtures in air. Minima in the ignition delays were predicted by a comprehensive chemical kinetic mechanism for binary fuel mixtures with methane.
Philip M. Dimpelfeld, David E. Foster
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, 2020
Lean operation of Spark-Ignition engines can provide higher thermal efficiency compared to standard stoichiometric operation. However, for a homogeneous lean mixture, the associated reduction of flame speeds becomes an important issue from the ...
Zongjie Hu +3 more
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Lean operation of Spark-Ignition engines can provide higher thermal efficiency compared to standard stoichiometric operation. However, for a homogeneous lean mixture, the associated reduction of flame speeds becomes an important issue from the ...
Zongjie Hu +3 more
semanticscholar +1 more source
Catalysis from A to Z, 2020
An ignition delay correlation was developed for a toluene reference fuel (TRF) blend that is representative of automotive gasoline fuels exhibiting two-stage ignition. Ignition delay times for the autoignition of a TRF 91 blend with an antiknock index of
Asim Iqbal
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An ignition delay correlation was developed for a toluene reference fuel (TRF) blend that is representative of automotive gasoline fuels exhibiting two-stage ignition. Ignition delay times for the autoignition of a TRF 91 blend with an antiknock index of
Asim Iqbal
semanticscholar +1 more source
Effect of Spark-Ignition on Combustion Periods during Spark-Assisted Compression Ignition
Combustion Science and Technology, 2009Previous works employed pressure-based heat release analysis, spark-discharge current/voltage measurements, and cycle-resolved combustion imaging to identify four periods of stratified-charge spark-assisted compression ignition: spark discharge, early kernel growth (EKG), flame propagation, and compression ignition.
Natarajan, Vinod K. +3 more
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1985
This chapter considers how the combustion process is initiated and constrained in spark ignition engines. The air/fuel mixture has to be close to stoichiometric (chemically correct) for satisfactory spark ignition and flame propagation. The equivalence ratio or mixture strength of the air/fuel mixture also affects pollutant emissions, as discussed in ...
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This chapter considers how the combustion process is initiated and constrained in spark ignition engines. The air/fuel mixture has to be close to stoichiometric (chemically correct) for satisfactory spark ignition and flame propagation. The equivalence ratio or mixture strength of the air/fuel mixture also affects pollutant emissions, as discussed in ...
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1990
Modern ignition systems may be conveniently divided into TWO types. These are: The first system, having contact breaker points, may be as shown opposite. To improve cold start performance this system may have included into it a The second system may use one of many methods of allowing transistors to switch-off the primary current (this being the ...
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Modern ignition systems may be conveniently divided into TWO types. These are: The first system, having contact breaker points, may be as shown opposite. To improve cold start performance this system may have included into it a The second system may use one of many methods of allowing transistors to switch-off the primary current (this being the ...
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Knock in Spark Ignition Engines
SAE Technical Paper Series, 1981The knocking characteristics of several fuels are studied using a single cylinder test engine with variations in key engine operating parameters. Compression ratio, spark advance, fuel equivalence ratio, exhaust gas recirculation, engine speed, charge inlet pressure and charge inlet temperature were varied to yield a range of engine cylinder pressure ...
B. Kempinski, A. By, J. M. Rife
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