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US 11,927,149 B2Granted
Method and system for multiple injections
AssigneeFord Global Technologies, LLC
InventorsRoss Pursifull, Ethan Sanborn, Joseph Thomas
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for adjusting injection timing of closely spaced multiple injections via a same injector. In one example, during an inter-injection spacing between a first injection and a second injection in a set of multiple injections being lower than a threshold period, an opening time of the second injection in the set of multiple injections may be adjusted based on another opening time of another second injection in a previous set of multiple injections.
Claims8
A method for an engine, comprising:
- during a first inter-injection spacing, adjusting injection timing based on opening times and/or closing times of one or more previous injections;
- during a second inter-injection spacing, adjusting a first injection timing of a first injection of a second set of injections based on a first injection of a first, previous set of injections, and adjusting a second injection timing of a second injection of the second set of injections based on a second injection of the first set of injections;
- and
- injecting fuel into the engine using one or more fuel injectors, the adjusted injection timing, and the adjusted second injection timing.
1 more element
A system for an engine, comprising:
- a fuel injector;
- and
- a controller with computer-readable instructions stored on non-transitory memory that when executed cause the controller to:
- inject fuel during a first set of multiple injections via the fuel injector during an engine cycle, learning each of a first opening time of a first injection of the first set and a second opening time of a second injection of the first set as a function of an inter-injection spacing between the first injection and the second injection;
- and
- inject fuel during a second set of multiple injections via the fuel injector during a subsequent engine cycle, adjust a third opening time of another first injection of the second set based on the learned first opening time, and adjusting a fourth opening time of another second injection of the second set based on the learned second opening time.
3 more elements
Dependencies are inferred from the claim text.