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US 11,788,483 B1Granted
Method and system for starting an engine
AssigneeFord Global Technologies, LLC
InventorXiaogang Zhang
Life of this patent
Estimating the term…
Abstract
Systems and methods for cold starting an internal combustion engine are described. In one example, the two amounts of fuel are injected into an engine cylinder during a cycle of the engine cylinder. The first amount of fuel is combusted to generate torque to rotate a crankshaft of the engine and the second amount of fuel is at least partially combusted in an exhaust system of the engine to increase exhaust gas temperature.
Claims20
A method for starting an engine, comprising:
- injecting a first amount of fuel during a cycle of a cylinder via a direct injector;
- injecting a second amount of fuel during the cycle to the cylinder via a pre-chamber;
- and
- supplying spark to the cylinder after injecting the first amount of fuel and before injecting the second amount of fuel during the cycle of the cylinder.
1 more element
A system, comprising:
- an engine including a cylinder having an exhaust valve, a direct injector configured to inject fuel to the cylinder, a pre-chamber coupled to the cylinder, the pre-chamber including an air injector and a fuel injector;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to inject a first amount of fuel via the direct injector during a cycle of the cylinder, and to inject a second amount of fuel via the pre-chamber and the fuel injector, the second amount of fuel injected when the exhaust valve is open.
A method for starting an engine, comprising:
- fully opening an engine throttle, beginning to open an intake valve of a cylinder 60 crankshaft degrees after top-dead-center intake stroke of the cylinder that includes the intake valve, directly injecting a first amount of fuel to the cylinder, and injecting a second amount of fuel to the cylinder via a pre-chamber.
Dependencies are inferred from the claim text.