Method for pre-ignition control
AssigneeFord Global Technologies, LLC
InventorChris Paul Glugla
Life of this patent
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Abstract
Various systems and methods are described for controlling pre-ignition in a boosted engine in a newly manufactured vehicle. One method comprises, during a pre-delivery phase of the vehicle, operating the boosted engine in a pre-delivery calibration with a first, higher enrichment, in response to a pre-ignition event. The pre-delivery calibration is deactivated during a post-delivery phase and the boosted engine is operated with a second, lower enrichment in response to a pre-ignition event.
Claims20
A method for a vehicle, comprising:
- responsive to an accelerator pedal depression while an engine is idling,
- raising engine speed from idling speed to a lower level when the vehicle is in a pre-delivery phase;
- and
- raising engine speed from the idling speed to a higher level when the vehicle is in a post-delivery phase.
A method for an engine of a vehicle, comprising:
- when the vehicle is in a pre-delivery phase,
- idling the engine at a higher engine idling speed;
- and
- responsive to a tip-in event, raising engine speed by a smaller amount to a first level;
- and
- when the vehicle is in a post-delivery phase, following the pre-delivery phase,
- idling the engine at a lower engine idling speed;
- and
- responsive to a tip-in event, raising the engine speed by a larger amount to a second level, higher than the first level.
A method for a vehicle having an engine, comprising:
- when a mileage of the vehicle is lower than a threshold, operating the engine with a first pre-delivery calibration, the first calibration including idling the engine at a higher idling speed and raising engine speed by a smaller amount to a first engine speed responsive to accelerator pedal depression;
- and
- when the mileage of the vehicle is at the threshold, transitioning the engine to a second, post-delivery calibration, the second calibration including idling the engine at a lower idling speed and raising engine speed by a larger amount to a second engine speed, higher than the first engine speed, responsive to the accelerator pedal depression.
Dependencies are inferred from the claim text.