Valvetrain control systems for internal combustion engines with different intake and exhaust leading modes
AssigneeGM Global Technology Operations LLC
InventorAllen B. Rayl
Life of this patent
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Abstract
A valve control system for an internal combustion engine includes a valve actuation system. The valve actuation system actuates at least one of an intake valve and an exhaust valve between N open lift modes via lift control valves. The control module enables transitioning of at least one of the intake valve and the exhaust valve between the N open lift modes. The control module defines M valve leading modes that indicate whether the intake valve transitions between the N open lift modes before, during the same time period, or after the exhaust valve. The control module selectively transitions the intake valve and the exhaust valve based on a current one of the M valve leading modes. N and M are integers greater than one.
Claims16
A valve control system for an internal combustion engine comprising:
- a valve actuation system that actuates at least one of an intake valve and an exhaust valve between N open lift modes via lift control valves;
- and
- a control module that enables transitioning of at least one of said intake valve and said exhaust valve between said N open lift modes,
- wherein said control module defines M valve leading modes that indicate whether said intake valve transitions between said N open lift modes before, during the same time period, or after said exhaust valve,
- wherein said control module selectively transitions said intake valve and said exhaust valve based on a current one of said M valve leading modes, and
- wherein N and M are integers greater than one.
A method of operating a valve control system for an internal combustion engine comprising:
- actuating at least one of an intake valve and an exhaust valve between N open lift modes via lift control valves via a valve actuating system;
- and
- enabling transitioning of at least one of said intake valve and said exhaust valve between said N open lift modes,
- defining M valve leading modes that indicate whether said intake valve transitions between said N open lift modes before, during the same time period, or after said exhaust valve,
- selectively transitioning said intake valve and said exhaust valve based on a current one of said M valve leading modes, and
- wherein N and M are integers greater than one.
Dependencies are inferred from the claim text.