Engine cranking system with cylinder deactivation for a direct injection engine
AssigneeGM Global Technology Operations LLC
InventorsJesse M. Gwidt, Jonathan T. Shibata, Vijay Ramappan, Stuart R. Smith, Michael J. Lucido
Life of this patent
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Abstract
An engine cranking system includes fuel injectors that are associated with multiple combustion chambers of an engine. The fuel injectors include a first fuel injector that is associated with a first combustion chamber. A second fuel injector is associated with a second combustion chamber. A control module is coupled to the fuel injectors and operates the first fuel injector in a deactivated state for a first chamber cycle during cranking of said engine. The first chamber cycle includes intake and exhaust strokes and is associated with a first combustion chamber.
Claims21
An engine cranking system comprising:
- a plurality of fuel injectors, associated with a plurality of combustion chambers of an engine, comprising:
- a first fuel injector associated with a first combustion chamber;
- and
- a second fuel injector associated with a second combustion chamber;
- a control module that operates said first fuel injector in a deactivated state for a first chamber cycle and during cranking of said engine,
- wherein said first chamber cycle includes intake and exhaust strokes and is associated with said first combustion chamber;
- and
- at least one of an intake valve and an exhaust valve of said first combustion chamber,
- wherein said control module maintains said at least one of said intake valve and said exhaust valve in a closed state during said intake and exhaust strokes.
An engine system comprising:
- an engine that has a combustion chamber with a chamber cycle;
- a fuel injector associated with said combustion chamber;
- a temperature sensor generating a temperature signal;
- a control module that operates said fuel injector in a deactivated state for said chamber cycle, which includes intake and exhaust strokes, during cranking of said engine and based on said temperature signal;
- and
- at least one of an intake valve and an exhaust valve of said combustion chamber
- wherein said control module maintains said at least one of said intake valve and said exhaust valve in a closed state during said intake and exhaust strokes.
A method of starting an engine comprising:
- cranking an engine including rotating said engine through a plurality of chamber cycles;
- deactivating a fuel injector associated with a combustion chamber of said engine during intake and exhaust strokes of at least one of said chamber cycles;
- and
- maintaining at least one of said intake valve and said exhaust valve of said combustion chamber in a closed state during said intake and exhaust strokes.
Dependencies are inferred from the claim text.