Back to results
US 7,255,066 B2Granted
Valve selection for an engine operating in a multi-stroke cylinder mode
AssigneeFord Global Technologies, LLC
InventorsDonald J. Lewis, John D. Russell, John O. Michelini
Life of this patent
Estimating the term…
Abstract
A method to control valve patterns in a cylinder operating in a multi-stroke cylinder mode. Valves are controlled to improve drivability and emissions.
Claims9
A system, comprising
- a hybrid-electric vehicle;
- an engine coupled in the hybrid-electric vehicle, the engine having at least a first and second cylinder, each with an electrically actuated valve, and at least one of the cylinders having at least three valves, wherein at least two valves communicate with a common manifold;
- a controller configured to:
- deactivate at least one of the cylinders by deactivating its respective electrically actuated valve;
- vary a number of strokes in a combustion cycle of at least one of the cylinders via its respective electrically actuated valve;
- and
- vary a valve pattern between the cylinders;
- wherein the variation between valve patterns includes a physical region of operating valves in the cylinders.
5 more elements
The system of 1 wherein the cylinders operate with varied valve patterns during a common engine cycle.
A system, comprising:
- a hybrid-electric vehicle;
- an engine coupled in the hybrid-electric vehicle, the engine having at least a cylinder with at least three valves including an electrically actuated valve, wherein at least two valves communicate with a common manifold;
- a controller configured to:
- deactivate the cylinder by deactivating the electrically actuated valve of the cylinder;
- vary a number of strokes in a combustion cycle of the cylinder via the electrically actuated valve of the cylinder;
- and
- vary a valve pattern of the cylinder;
- wherein the variation includes varying a physical region of operating valves in the cylinder between a first pattern during a first condition and a second pattern during a second condition.
5 more elements
The system of 8 wherein electrically actuated valve is an intake valve.
Dependencies are inferred from the claim text.