System and method for engine with fuel vapor purging
AssigneeFord Global Technologies, LLC
InventorJames Michael Kerns
Life of this patent
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Abstract
A method for controlling engine operation of an engine having a cylinder receiving fuel from a first and a second fuel injector, the first injector having a first relationship between a first input signal and a first amount of injected fuel, and the second injector having a second relationship between a second input signal and a second amount of injected fuel; the method comprising of varying injection from the first injector into the cylinder, varying injection from the second injector into the cylinder, purging fuel vapors from a fuel system into the cylinder, and adaptively learning said first and second relationships based on sensed operating conditions.
Claims28
A method for controlling engine operation of an engine having a cylinder receiving fuel from a first and a second fuel injector, the first injector having a first relationship between a first input signal and a first amount of injected fuel, and the second injector having a second relationship between a second input signal and a second amount of injected fuel;
- the method comprising:
- varying injection from the first injector into the cylinder;
- varying injection from the second injector into the cylinder;
- purging fuel vapors from a fuel system into the cylinder;
- adaptively learning said first and second relationships based on sensed operating conditions;
- and
- dynamically correcting said varying injection from at least one of said first or second injectors corresponding to said first and second relationships.
A system for an engine of a vehicle traveling on the road,
- a first fuel injector coupled to a cylinder of the engine;
- a second fuel injector coupled to said cylinder of the engine;
- a fuel vapor purge system configured to deliver a blend of vapors to said cylinder of the engine;
- wherein said blend includes at least a first fuel and a second fuel having different characteristics;
- and
- a controller for varying an amount of injection from one of said first and second fuel injectors as said blend of said vapors varies.
A system for an engine of a vehicle traveling on the road,
- a first fuel injector coupled to a cylinder of the engine;
- a second fuel injector coupled to said cylinder of the engine;
- a first fuel vapor purge valve configured to adjust delivery of vapors from a first reservoir to said cylinder of the engine;
- a second fuel vapor purge valve configured to adjust delivery of vapors from a second reservoir to said cylinder of the engine, where said second reservoir holds a fuel differing from a fuel in said first reservoir;
- and
- a controller for varying an amount of injection from one of said first and second fuel injectors as a concentration or blend of vapors delivered to the engine varies, where at least under some conditions, said first valve enables delivery of vapors from said first reservoir while said second valve restricts delivery of vapors from said second reservoir.
A system for an engine of a vehicle traveling on the road,
- a first fuel injector coupled to a cylinder of the engine:
- a second fuel injector coupled to saId cylinder of the engine;
- a compression device for compressing intake air delivered to said cylinder;
- a fuel vapor purge system for delivering vapors to said cylinder of the engine;
- and
- a controller for varying an amount of injection from one of said first and second fuel injectors as a concentration or blend of said vapors varies, and further based on operation of the compression device.
Dependencies are inferred from the claim text.