Using cylinder firing history for combustion control in a skip fire engine
First Claim
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1. An engine controller for an internal combustion engine operated in a skip fire manner, the engine having a plurality of working chambers, the engine controller comprising:
- a firing counter that stores a firing history indicating a number of skips for a working chamber in the engine; and
a combustion control module that is arranged to determine a combustion control parameter used in the control of an actuator to help manage combustion in the working chamber during the next fired working cycle that occurs in the working chamber, and wherein the determination of the combustion control parameter is based at least in part on the firing history.
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Abstract
Various methods and arrangements for determining a combustion control parameter for a working chamber in an engine are described. In one aspect, an engine controller includes a firing counter that stores a firing history for the working chamber. A combustion control module is used to determine a combustion control parameter, which is used to help manage combustion in the working chamber. The combustion control parameter is determined based at least in part on the firing history.
115 Citations
28 Claims
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1. An engine controller for an internal combustion engine operated in a skip fire manner, the engine having a plurality of working chambers, the engine controller comprising:
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a firing counter that stores a firing history indicating a number of skips for a working chamber in the engine; and a combustion control module that is arranged to determine a combustion control parameter used in the control of an actuator to help manage combustion in the working chamber during the next fired working cycle that occurs in the working chamber, and wherein the determination of the combustion control parameter is based at least in part on the firing history. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23, 24, 25, 26)
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14. A method for manipulating a combustion control parameter for a working chamber of an engine during skip fire operation of the engine, the method comprising:
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storing a firing history indicating a number of skips for the working chamber; determining a combustion control parameter that is used to help manage combustion in the working chamber wherein the determination of the combustion control parameter is based at least in part on the firing history; and utilizing the combustion control parameter in the control of an actuator that impacts the combustion in the working chamber during a next fired working cycle of the working chamber. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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27. An engine controller for an internal combustion engine operated in a skip fire manner, the engine having a plurality of working chambers including first and second working chambers, the engine controller comprising:
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a firing counter that stores a firing history indicating a number of skips for the first working chamber in the engine; and a combustion control module that is arranged to determine a combustion control parameter used in the control of an actuator to help manage combustion in the second working chamber during the next fired working cycle that occurs in the second working chamber, and wherein the determination of the combustion control parameter is based at least in part on the firing history for the first working chamber. - View Dependent Claims (28)
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Specification