Engine analyzers
AssigneeTI Crypton Limited
InventorsGeoffrey J. Everett, Christopher J. Hunt
Life of this patent
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Abstract
An engine analyzer, for analyzing ignition voltage or current signals in an engine of the kind in which each spark plug is fed with a succession of pulses, alternate pulses producing real sparks to ignite the petrol/air mixture, the other pulses producing wasted sparks at a point of the engine operating cycle remote from ignition, the analyzer including circuitry to pass the real spark pulse and inhibit passage of the wasted spark pulses.
Claims9
An engine analyser, adapted to process ignition voltage or current signals from a pair of engine components comprising the spark plug and the lead feeding that spark plug of a spark ignition internal combustion engine of the kind in which said signals comprise a succession of alternating real and wasted sparks, said analyser including a probe to be connected to one component of said pair of components, for emitting an input signal to the analyser representative of the ignition voltage or current, circuitry means connected between said probe and said analyser which will pass those pulses of the input signal representative of the real spark and to inhibit passage of those pulses of said input signal representative of the wasted spark.
An engine analyser, adapted to process ignition voltage or current signals from a pair of engine components comprising the spark plug and the lead feeding that spark plug of a spark ignition internal combustion engine of the kind in which said signals comprise a succession of alternating real and wasted sparks, said analyser including a probe to be connected to one component of said pair of components, the probe emitting an input signal to the analyser representative of the ignition voltage or current, said probe being connected to circuitry means which will pass those pulses of the input signal representative of the real spark and will inhibit passage of those pulses of the input signal representative of the wasted spark connected between said probe and said analyser, said circuitry further including rejection means arranged to inhibit passage of those pulses from said probe which do not reach a magnitude which is a predetermined percentage of the magnitude of, and less than, the previous pulses from said probe.
Dependencies are inferred from the claim text.