Mass fraction burned and pressure estimation through spark plug

Details Mass fraction burned and pressure estimation through spark plug Mass fraction burned and pressure estimation through spark plug

1997-06-26

2000-07-18

McCall, Eric S.

Measuring and testing

Engine detonation

Specific type of detonation sensor

73 3503, G01M 1500

Patent

active

060890770

ABSTRACT:
Mass fraction burned in a cylinder of an internal combustion engine is determined by measuring an ion signal across a gap of a spark plug and identifying an inflection point of the ion signal. The mass fraction burned is determined using an expression that includes a constant. A value for the constant is determined using the inflection point of the ion signal, and the mass fraction burned is determined using the expression and the constant.

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Michael F.J. Brunt et al.; "Evaluation of Burn Rate Routines and Analysis Errors"; Society of Automotive Engineers, Inc. pp. 19-29.
Andre Saitzkoff et al.; "An Ionization Equilibrium Analysis of the Spark Plug as an Ionization Sensor"; 1996; Society of Automotive Engineers, Inc.; pp. 157-162.
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Andre Saitzkoff et al.; "In-Cylinder Pressure Measurements Using the Spark Plug as an Ionization Sensor"; 1997; Society of Automotive Engineers, Inc.; pp. 187-197.

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