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US 2014/0278005 A1Published application
Method for improving engine starting
AssigneeFord Global Technologies, LLC
InventorsAlex O'Connor Gibson, Brad Alan VanDerWege, Cindy Zhou, Jianwen James Yi, John Eric Rollinger
Life of this patent
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Abstract
A method and system for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, the method adjusts a port fuel injection amount in response to engine stopping position. The engine stopping position may be indicative of a fraction of injected fuel that enters a cylinder for a first combustion event since engine stop.
Claims20
A method for starting an engine, comprising:
- stopping the engine;
- and
- adjusting an amount of fuel supplied to a cylinder intake port in response to engine stop position, the amount of fuel participating in a first combustion event since engine stop.
A method for starting an engine, comprising:
- stopping the engine;
- and
- adjusting an amount of fuel supplied to an intake port of a cylinder for a first combustion event since engine stop in response to intake valve closing timing of the cylinder relative to engine stop position.
An engine system, comprising:
- an engine including a cylinder;
- a port fuel injector positioned to supply fuel to the cylinder;
- and
- a controller including non-transitory instructions for adjusting an amount of fuel supplied via the port fuel injector to the cylinder for a first combustion event in the cylinder since engine stop, the amount of fuel supplied to the cylinder adjusted in response to engine cranking speed irrespective of engine air flow.
1 more element
Dependencies are inferred from the claim text.