Pre-delivery strategy for diesel-engine vehicles
AssigneeFord Global Technologies, LLC
InventorsJohn William Hoard, William Charles Ruona
Life of this patent
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Abstract
A method to supply fuel to an engine of a vehicle is provided. The method includes adjusting a direct injection of fuel into a cylinder of the engine based on whether the vehicle is in a pre-delivery state. In one example, the method includes reducing an amount of fuel in a post injection to reduce cylinder bore wetting effects and lubricant dilution during the engine cold start. After pre-delivery, a normal post injection schedule may be used to reduce emissions.
Claims16
A method of supplying fuel to an engine of a vehicle, the method comprising:
- modifying a schedule of direct injection of fuel into a cylinder of the engine based on whether the vehicle is in a pre-delivery state or whether the vehicle is no longer in the pre-delivery state.
A method of supplying fuel to a direct-injection engine of a vehicle, comprising:
- if the vehicle is in a pre-delivery state, then providing a main injection of fuel with no post injection when an exhaust-aftertreatment device of the vehicle is below a threshold temperature;
- and
- if the vehicle is no longer in the pre-delivery state, then providing a main injection and post injection of fuel when the exhaust-aftertreatment device is below the threshold temperature.
Dependencies are inferred from the claim text.