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A compression sense ignition system includes a sensing capacitor having a conductive sensing element disposed in proximity to the secondary winding leads of a first and a second ignition coil for developing a compression sense ignition signal. Epoxy potting material encapsulates the leads and the se

A compression sense ignition system includes a sensing capacitor having a conductive sensing element disposed in proximity to the secondary winding leads of a first and a second ignition coil for developing a compression sense ignition signal. Epoxy potting material encapsulates the leads and the sensing element to reduce variation of the effective capacitance of the sensing capacitor. The compression sense ignition signal is processed to generate a cylinder identification signal which is used to determine absolute engine position. A fault mode detection and correction scheme is implemented wherein a controller responsive to the cylinder identification signal can determine correct absolute engine position notwithstanding the occurrence of one or more engine or ignition system faults which may impair the cylinder identification signal.

대표청구항 ▼

1. A direct ignition apparatus comprising:a housing; a pair of ignition coils disposed in the housing each having a secondary winding configured to develop an ignition voltage at respective first ends thereof, each one of said first ends being configured to be connected to first and second spark plu

1. A direct ignition apparatus comprising:a housing; a pair of ignition coils disposed in the housing each having a secondary winding configured to develop an ignition voltage at respective first ends thereof, each one of said first ends being configured to be connected to first and second spark plugs disposed proximate a corresponding cylinder of an internal combustion engine, said ignition voltage being configured to cause said spark plugs to produce respective spark discharges; a sensing conductive element including a generally planar portion disposed a predetermined distance from said pair of ignition coils; dielectric material substantially occupying a space between said pair of ignition coils and said sensing conductive element; and, an ignition signal processing circuit electrically connected to said sensing conductive element to sense said spark discharges capacitively coupled to said conductive element from said pair of ignition coils.