Coil on plug inductive sampling method

Details Coil on plug inductive sampling method Coil on plug inductive sampling method

2005-02-01

2005-02-01

Nolan, Jr., Charles H (Department: 2854)

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Coil

C324S525000

Reexamination Certificate

active

06850070

ABSTRACT:
A coil-on plug testing apparatus generates an output signal representing an ignition signal. The testing apparatus includes an inductive sensor for detecting an electromagnetic flux generated by a coil-on plug device during a firing event and generating and outputting a voltage in response thereto, and a signal processing circuit electrically connected to the inductive sensor for generating an output signal in response to variations in the voltage output by the inductive sensor. A method for determining burn time for a coil-on plug ignition includes disposing an inductive sensor adjacent to a coil-on plug ignition housing, using the inductive sensor to detect an electromagnetic flux output by the coil-on plug ignition during a period encompassing at least one firing section, and determining a burn time by identifying a firing line, identifying an endpoint of a spark line and determining a time period therebetween.

REFERENCES:
patent: 4008430 (1977-02-01), Blum
patent: 4090125 (1978-05-01), Warner
patent: 4146833 (1979-03-01), McKinnon
patent: 1088989 (2001-04-01), None

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