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US 2022/0090548 A1Published application
Method for determining pilot injection mass
AssigneesTula Technology, Inc., Cummins Inc.
InventorsBenjamin Wolk, Justin Lee, Timothy Hayden Shipp
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Abstract
A variety of methods and arrangements are described for determining a pilot injection mass during skip fire operation of an internal combustion engine.
Claims24
A method for determining a pilot injection mass during skip fire operation of an internal combustion engine, the method comprising:
- skipping selected cylinders;
- and
- determining a pilot injection mass;
- injecting the pilot injection mass into a skipped cylinder that is to be fired;
- injecting a main injection in the skipped cylinder that is to be fired, wherein the pilot injection mass is injected into the skipped cylinder before the main injection is injected;
- and
- firing the skipped cylinder.
4 more elements
An engine controller in an internal combustion engine operated in a skip fire manner, wherein the engine controller configured to:
- selectively skip certain cylinders;
- determine a pilot injection mass;
- inject the pilot injection mass into a skipped cylinder that is to be re-fired;
- inject a main injection in the skipped cylinder that is to be re-fired, wherein the pilot injection mass is injected into the skipped cylinder before the main injection is injected;
- and
- fire the skipped cylinder.
3 more elements
A non-transitory, computer-readable medium having instructions recorded thereon which, when executed by a processor, cause the processor to:
- selectively skip certain cylinders;
- determine a pilot injection mass;
- inject the pilot injection mass into a skipped cylinder that is to be re-fired;
- inject a main injection in the skipped cylinder that is to be re-fired, wherein the pilot injection mass is injected into the skipped cylinder before the main injection is injected;
- and
- fire the skipped cylinder.
3 more elements
Dependencies are inferred from the claim text.