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US 10,519,922 B2Granted
Method and system for ignition coil control
AssigneeFord Global Technologies, LLC
InventorsJustin Cartwright, Kirk Pulay
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for determining an ignition coil dwell time based on an estimated ignition coil temperature. In one example, a method may include estimating the ignition coil temperature based on heat transfer between engine and the ignition coil, heat transfer between ambient and the ignition coil, and internal resistive heating of the ignition coil.
Claims6
A system comprising:
- an engine,
- a spark plug coupled to the engine,
- an ignition coil coupled to the spark plug, and
- a controller configured with computer readable instructions stored on non-transitory memory for:
- periodically updating an estimated ignition coil temperature based on a change rate of an ignition coil temperature, wherein the change rate of the ignition coil temperature is a mathematical function of each and every one of an engine temperature, an ambient temperature, and a first dwell time for a most recent spark ignition;
- and
- charging the ignition coil with a second dwell time determined based on the updated estimated ignition coil temperature.
4 more elements
Dependencies are inferred from the claim text.