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US 9,002,623 B2Granted
Fully flexible exhaust valve actuator control systems and methods
AssigneeGM Global Technology Operations LLC
InventorJoel Cowgill
Life of this patent
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Abstract
A system for a vehicle includes a mode control module and a valve control module. The mode control module selectively sets a desired ignition mode for an engine to one of a spark ignition (SI) mode and a homogenous charge compression ignition (HCCI) mode. Using a fully flexible valve actuator, the valve actuator module selectively adjusts closing timing of an exhaust valve in response to: the desired ignition mode transitioning from the HCCI mode to the SI mode; and the desired ignition mode transitioning from the SI mode to the HCCI mode.
Claims20
A system comprising:
- a mode control module that selectively sets a desired ignition mode for an engine to one of a spark ignition (SI) mode and a homogenous charge compression ignition (HCCI) mode;
- and
- a valve control module that, using a fully flexible valve actuator, incrementally adjusts closing timing of an exhaust valve at least twice in response to:
- the desired ignition mode transitioning from the HCCI mode to the SI mode;
- and
- the desired ignition mode transitioning from the SI mode to the HCCI mode.
3 more elements
A method comprising:
- selectively setting a desired ignition mode for an engine to one of a spark ignition (SI) mode and a homogenous charge compression ignition (HCCI) mode;
- and
- using a fully flexible valve actuator, incrementally adjusting closing timing of an exhaust valve at least twice in response to:
- the desired ignition mode transitioning from the HCCI mode to the SI mode;
- and
- the desired ignition mode transitioning from the SI mode to the HCCI mode.
3 more elements
Dependencies are inferred from the claim text.