Ford Global Technolgoies, LLC

Ford Motor Company Limited

Jeffrey Koncsol

Jing Sun

Daniel V Orzel

Yong-Wha Kim

Arnold W Brandt

Julie Helen Buckland

A system and method for operating an engine is disclosed. The system and method includes performing multiple ignitions during a single engine cycle. According to one embodiment, a first ignition takes place during a first stroke in the cycle and a second ignition takes place during a second stroke in the cycle. The system and method may further include performing multiple injections during the engine cycle.

Controlled port oxidation of direct injection spark ignition engines

Provided is a method and circuit for detecting cylinder misfire in an internal combustion engine having an ignition system including an ignition device, an ignition coil having a primary and a secondary winding, and a pair of spark plugs having respective gaps. As disclosed, the circuit is operative to separate spark current and ionization current to improve detection of cylinder misfire. The circuit includes power supply means for supplying voltage to the circuit to generate ion current across the spark plug gaps and voltage limiting means for isolating said power supply means from said ignition coil. There is also included negative voltage clamping means in electrical contact with the ignition coil secondary winding for clamping selected negative voltages generated during ignition.

Method and apparatus for detecting cylinder misfire in an internal

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Westland, MI, United States of America

Jeffrey Koncsol