Cylinder activation/deactivation sequence control systems and methods
First Claim
1. A cylinder control system of a vehicle, comprising:
- a target cylinder count module that determines a target number of cylinders of an engine to be activated during a future period,wherein the future period includes N sub-periods and N is an integer greater than or equal to two;
a first sequence setting module that, when a change in the target number is less than a predetermined value;
retrieves M predetermined percentages for M predetermined sequences for activating and deactivating cylinders of the engine, respectively, wherein M is an integer greater than or equal to two, respectively; and
,generates a sequence indicating N target numbers of cylinders to be activated during the N sub-periods, respectively, based on use of the M predetermined sequences in proportion to the M predetermined percentages, respectively;
a second sequence setting module that retrieves the M predetermined sequences for activating and deactivating cylinders of the engine, and that generates a target sequence for activating and deactivating cylinders of the engine during the future period using the M predetermined sequences in order according to the sequence indicating N target numbers of cylinders to be activated during the N sub-periods; and
a cylinder actuator module that, during the future period;
activates opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the target sequence; and
deactivates opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the target sequence.
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Accused Products
Abstract
A target cylinder count module determines a target number of cylinders of an engine to be activated during a future period. The future period includes N sub-periods, and N is an integer greater than one. Based on the target number, a first sequence setting module generates a sequence indicating N target numbers of cylinders to be activated during the N sub-periods, respectively. A second sequence setting module retrieves N predetermined sequences for activating and deactivating cylinders during the N sub-periods, respectively, and generates a target sequence for activating and deactivating cylinders during the future period based on the N predetermined sequences. During the future period, a cylinder actuator module: activates opening of intake and exhaust valves of the cylinders that are to be activated based on the target sequence; and deactivates opening of intake and exhaust valves of the cylinders that are to be deactivated based on the target sequence.
282 Citations
16 Claims
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1. A cylinder control system of a vehicle, comprising:
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a target cylinder count module that determines a target number of cylinders of an engine to be activated during a future period, wherein the future period includes N sub-periods and N is an integer greater than or equal to two; a first sequence setting module that, when a change in the target number is less than a predetermined value; retrieves M predetermined percentages for M predetermined sequences for activating and deactivating cylinders of the engine, respectively, wherein M is an integer greater than or equal to two, respectively; and
,generates a sequence indicating N target numbers of cylinders to be activated during the N sub-periods, respectively, based on use of the M predetermined sequences in proportion to the M predetermined percentages, respectively; a second sequence setting module that retrieves the M predetermined sequences for activating and deactivating cylinders of the engine, and that generates a target sequence for activating and deactivating cylinders of the engine during the future period using the M predetermined sequences in order according to the sequence indicating N target numbers of cylinders to be activated during the N sub-periods; and a cylinder actuator module that, during the future period; activates opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the target sequence; and deactivates opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the target sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cylinder control method of a vehicle, comprising:
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determining a target number of cylinders of an engine to be activated during a future period, wherein the future period includes N sub-periods and N is an integer greater than or equal to two; when a change in the target number is less than a predetermined value; retrieving M predetermined percentages for M predetermined sequences for activating and deactivating cylinders of the engine, respectively, wherein M is an integer greater than or equal to two, respectively; and generating a sequence indicating N target numbers of cylinders to be activated during the N sub-periods, respectively, based on use of the M predetermined sequences in proportion to the M predetermined percentages, respectively; retrieving the M predetermined sequences for activating and deactivating cylinders of the engine; generating a target sequence for activating and deactivating cylinders of the engine during the future period using the M predetermined sequences in order according to the sequence indicating N target numbers of cylinders to be activated during the N sub-periods, respectively; and during the future period; activating opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the target sequence; and deactivating opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the target sequence. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification