Dynamic skip fire transitions for fixed CDA engines
AssigneeTula Technology, Inc.
InventorVijay Srinivasan
Life of this patent
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Abstract
A variety of methods and arrangements are described for managing transitions between operational states of an internal combustion engine during skip fire operation of the engine.
Claims20
A method of managing transitions between operational states of an internal combustion engine having a plurality of working chambers, a first working chamber of the plurality of working chambers being non-deactivatable during operation of the internal combustion engine, the method comprising:
- operating the engine in a skip fire manner during a transition between a first displacement and a second displacement of the engine comprising:
- generating a firing sequence that includes one or more firing and skip commands for operating the working chambers;
- determining whether the skip command involves the first working chamber;
- and
- when the skip command involves the first working chamber, cutting the fuel to the first working chamber.
An engine controller to manage transitions between operational states of an internal combustion engine having a plurality of working chambers, a first working chamber of the plurality of working chambers being non-deactivatable during operation of the internal combustion engine, the engine controller configured to perform a following comprising:
- operate the engine in a skip fire manner during a transition between a first displacement and a second displacement comprising:
- generate a firing sequence that includes one or more firing and skip commands for operating the working chambers;
- determine whether the skip command involves the first working chamber;
- and
- when the skip command involves the first working chamber, cut the fuel to the first working chamber.
A system, comprising:
- an engine controller to manage transitions between a first displacement and a second displacement of an internal combustion engine having a plurality of working chambers, a first working chamber of the plurality of working chambers being non-deactivatable during operation of the internal combustion engine, the engine controller configured to perform a following comprising:
- operate the engine in a skip fire manner during a transition comprising:
- generate a firing sequence that includes one or more firing and skip commands for operating the working chambers;
- determine whether the skip command involves the first working chamber;
- and
- when the skip command involves the first working chamber, cut the fuel to the first working chamber.
Dependencies are inferred from the claim text.