Method and system for engine control
AssigneeFord Global Technologies, LLC
InventorsDavid Karl Bidner, Ralph Wayne Cunningham, Stephen G. Russ, James Hilditch, John Eric Rollinger
Life of this patent
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Abstract
Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.
Claims19
An engine system, comprising,
- an engine;
- a turbocharger coupled to the engine a particulate matter sensor coupled to the engine;
- a first port injector injecting a first fuel into the cylinder;
- a second direct injector injecting a second fuel into the cylinder;
- and
- a control system with computer readable instructions for activating and deactivating the first port injector and the second direct injector in response to an amount of particulate matter produced by the engine.
A method of controlling fuel injection to an engine cylinder having a first port injector and a second direct injector, comprising,
- adjusting fuel injection amounts among the first port injector and second direct injector in response to an amount of particulate matter and a fuel alcohol content.
A method of operating an engine including a first port injector injecting a first fuel into an engine cylinder and a second direct injector injecting a second fuel into the cylinder, comprising:
- boosting air delivered to the cylinder;
- and
- adjusting a fuel injection to the cylinder between the first port injector and the second direct injector based on a soot load of the engine.
Dependencies are inferred from the claim text.