Firing pattern management for improved transient vibration in variable cylinder deactivation mode
First Claim
1. A cylinder control system of a vehicle, comprising:
- a cylinder control module that;
determines target numbers of cylinders of an engine to be activated during a period;
determines, based on the target numbers and an engine speed, N predetermined subsequences for controlling the cylinders of the engine during the period, where N is an integer greater than zero;
determines a transition parameter associated with at least one transition between two of the N predetermined subsequences, the two predetermined subsequences each including M indicators for the M cylinder events, each of the M indicators indicating whether to activate or deactivate a corresponding cylinder, where M is an integer greater than one,wherein the transition parameter includes a first number (X) for truncating one of the two predetermined subsequences and a second number (Y) for truncating the other one of the two predetermined subsequences, where X and Y are integers greater than zero and less than M;
adjusts the one of the two predetermined subsequences, by removing the last X number of the M indicators of the one of the two predetermined subsequences, to produce a first adjusted predetermined subsequence; and
adjusts the other one of the two predetermined subsequences, by removing the first Y number of the M indicators of the other one of the two predetermined subsequences, to produce a second adjusted predetermined subsequence; and
a cylinder actuator module that, during the period, controls the cylinders of the engine based on the N predetermined subsequences, the first adjusted predetermined subsequence, and the second adjusted predetermined subsequence.
1 Assignment
0 Petitions
Accused Products
Abstract
A system includes a cylinder control module that determines target numbers of cylinders of an engine to be activated during a period, determines, based on the target numbers and an engine speed, N predetermined sequences for controlling the cylinders of the engine during the period, determines whether a transition parameter is associated with at least one of the N predetermined subsequences and selectively adjusts at least one of the N predetermined subsequences based on the determination of whether a transition parameter is associated with at least two of the N predetermined sequences. The system further includes a cylinder actuator module that, during the period, controls the cylinders of the engine based on the N predetermined sequence and based on the at least one selectively adjusted predetermined sequences.
298 Citations
14 Claims
-
1. A cylinder control system of a vehicle, comprising:
-
a cylinder control module that; determines target numbers of cylinders of an engine to be activated during a period; determines, based on the target numbers and an engine speed, N predetermined subsequences for controlling the cylinders of the engine during the period, where N is an integer greater than zero; determines a transition parameter associated with at least one transition between two of the N predetermined subsequences, the two predetermined subsequences each including M indicators for the M cylinder events, each of the M indicators indicating whether to activate or deactivate a corresponding cylinder, where M is an integer greater than one, wherein the transition parameter includes a first number (X) for truncating one of the two predetermined subsequences and a second number (Y) for truncating the other one of the two predetermined subsequences, where X and Y are integers greater than zero and less than M; adjusts the one of the two predetermined subsequences, by removing the last X number of the M indicators of the one of the two predetermined subsequences, to produce a first adjusted predetermined subsequence; and adjusts the other one of the two predetermined subsequences, by removing the first Y number of the M indicators of the other one of the two predetermined subsequences, to produce a second adjusted predetermined subsequence; and a cylinder actuator module that, during the period, controls the cylinders of the engine based on the N predetermined subsequences, the first adjusted predetermined subsequence, and the second adjusted predetermined subsequence. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A cylinder control method of a vehicle, comprising:
-
determining target numbers of cylinders of an engine to be activated during a period, determining, based on the target numbers and an engine speed, N predetermined subsequences for controlling cylinders of the engine during the period, where N is an integer greater than zero; determining a transition parameter associated with at least one transition between two of the N predetermined subsequences, the two predetermined subsequences each including M indicators for the M cylinder events, each of the M indicators indicating whether to activate or deactivate a corresponding cylinder, where M is an integer greater than one, wherein the transition parameter includes a first number (X) for truncating one of the two predetermined subsequences and a second number (Y) for truncating the other one of the two predetermined subsequences, where X and Y are integers greater than zero and less than M; adjusting the one of the two predetermined subsequences, by removing the last X number of the M indicators of the one of the two predetermined subsequences, to produce a first adjusted predetermined subsequence; adjusting the other one of the two predetermined subsequences, by removing the first Y number of the M indicators of the other one of the two predetermined subsequences, to produce a second adjusted predetermined subsequence; and controlling, during the period, the cylinders of the engine based on the N predetermined subsequences, the first adjusted predetermined subsequence, and the second adjusted predetermined subsequence. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification