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US 10,711,729 B2Granted
Diesel engine dual fuel injection strategy
AssigneeFord Global Technologies, LLC
InventorsEric Matthew Kurtz, Daniel Joseph Styles
Life of this patent
Estimating the term…
Abstract
Methods and systems for supplying fuel to a diesel engine during a cycle of a cylinder are described. In one example, a cylinder is supplied fuel via two fuel injectors having different fuel flow rates. The two fuel injectors may be operated to provide pilot, main, and post combustion fuel injections during a cycle of a cylinder.
Claims15
A diesel fuel injection method, comprising:
- during a cycle of a cylinder, alternating pilot fuel injections between a first diesel fuel injector and a second diesel fuel injector via a controller, the first diesel fuel injector and the second diesel fuel injector positioned in the cylinder, the second diesel fuel injector opening to provide a second pilot fuel injection in the cycle after the first diesel fuel injector closes after providing a first pilot fuel injection in the cycle, the second diesel fuel injector beginning to open for the second pilot fuel injection before an off dwell time of the first diesel fuel injector expires after the first pilot fuel injection.
A diesel fuel injection method, comprising:
- during a cycle of a cylinder, via a controller, providing main fuel injections via a first diesel fuel injector and a second diesel fuel injector that overlap in time, the first diesel fuel injector and the second diesel fuel injector positioned in the cylinder, the first diesel fuel injector a low fuel flow diesel fuel injector and the second diesel fuel injector a high fuel flow diesel fuel injector;
- and
- alternating pilot fuel injections between the first diesel fuel injector and the second diesel fuel injector.
A diesel fuel injection method, comprising:
- during a cycle of a cylinder, via a controller, providing main fuel injections via a first diesel fuel injector and a second diesel fuel injector that overlap in time, the first diesel fuel injector and the second diesel fuel injector positioned in the cylinder, the first diesel fuel injector a low fuel flow diesel fuel injector and the second diesel fuel injector a high fuel flow diesel fuel injector;
- and
- ending a main fuel injection provided via the first diesel fuel injector and a main fuel injection provided via the second diesel fuel injector at a different time.
Dependencies are inferred from the claim text.