System and method for controlling busyness of cylinder mode changes
First Claim
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1. An engine operating method, comprising:
- adjusting a time a first cylinder poppet valve is allowed to be deactivated via a controller in response to an amount of time a second cylinder poppet valve was deactivated during a prior period of cylinder deactivation;
deactivating the first cylinder poppet valve via the controller in response to the time the first cylinder poppet valve is allowed to be deactivated; and
reducing a total actual number of active engine cylinders combusting air and fuel from a first number of active engine cylinders to a second number of active engine cylinders in response to the time the first cylinder poppet valve is allowed to be deactivated.
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Abstract
Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, mode changes between deactivating cylinders is based on an amount of time a valve is deactivated, and the longer the valve is deactivated the sooner cylinder valves may be deactivated. If the amount of time the valve is deactivated is short, the time that valves may be deactivated may be delayed.
40 Citations
19 Claims
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1. An engine operating method, comprising:
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adjusting a time a first cylinder poppet valve is allowed to be deactivated via a controller in response to an amount of time a second cylinder poppet valve was deactivated during a prior period of cylinder deactivation; deactivating the first cylinder poppet valve via the controller in response to the time the first cylinder poppet valve is allowed to be deactivated; and reducing a total actual number of active engine cylinders combusting air and fuel from a first number of active engine cylinders to a second number of active engine cylinders in response to the time the first cylinder poppet valve is allowed to be deactivated. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An engine operating method, comprising:
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increasing a value of a variable, stored in a memory of a controller, in response to exiting a cylinder deactivation period via the controller; decreasing the value of the variable a predetermined amount over a predetermined amount of time; and deactivating a cylinder poppet valve via the controller in response to the variable being equal to zero and a request to deactivate the cylinder poppet valve. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A vehicle system, comprising:
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an engine including one or more cylinder poppet valves that may be deactivated; and a controller including non-transitory executable instructions, which, when executed by the controller, adjust an amount of time between a request to deactivate the one or more cylinder poppet valves and a time the one or more cylinder poppet valves are deactivated in response to an amount of time the engine operates with one or more cylinders deactivated via holding closed the one or more cylinder poppet valves during an entire engine cycle. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification