SYSTEMS AND METHODS FOR DECREASING TORQUE FLUCTUATIONS DURING CYLINDER DEACTIVATION AND REACTIVATION
A control system for an engine includes a first spark control module and a second spark control module. The first spark control module retards spark timing for M of N cylinders of the engine to a first spark timing during a period before deactivating or after reactivating the M cylinders, wherein M...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
16.08.2012
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Subjects | |
Online Access | Get full text |
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Summary: | A control system for an engine includes a first spark control module and a second spark control module. The first spark control module retards spark timing for M of N cylinders of the engine to a first spark timing during a period before deactivating or after reactivating the M cylinders, wherein M is an integer greater than or equal to one, and wherein N is an integer greater than M. The second spark control module advances spark timing for (N−M) active cylinders of the engine to a second desired spark timing during the period before deactivating or after reactivating the M cylinders, wherein the second spark timing is greater than the first spark timing. |
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Bibliography: | Application Number: US201113026603 |