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US 10,024,256 B2Granted
System and method for intake manifold pressure control
AssigneeFord Global Technologies, LLC
InventorsAdam J. Richards, John Eric Rollinger
Life of this patent
Estimating the term…
Abstract
Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, engine volumetric efficiency actuators are adjusted in response to a request to activate engine cylinders so that engine intake manifold pressure is drawn down quickly toward its normal state at the engine's present speed and torque.
Claims20
An engine operating method, comprising:
- adjusting an engine volumetric efficiency actuator while engine cylinders are deactivated to a first position to increase engine cylinder volumetric efficiency via a controller in response to engine intake manifold pressure being greater than a threshold at an engine speed and a driver demand torque, and where the engine cylinders are deactivated via holding cylinder poppet valves closed during an entire engine cycle.
An engine operating method, comprising:
- adjusting an engine volumetric efficiency actuator to a first position in response to a request to activate one or more cylinders when all engine cylinders are not activated during a first condition, the volumetric efficiency actuator adjusted to the first position based on engine speed and driver demand torque;
- and
- adjusting an engine volumetric efficiency actuator to a second position in response to a request to activate one or more cylinders when all engine cylinders are not activated during a second condition, the volumetric efficiency actuator adjusted to the second position based on engine intake manifold pressure.
A vehicle system, comprising:
- an engine including one or more cylinder poppet valves that may be deactivated and a volumetric efficiency actuator;
- and
- a controller including non-transitory executable instructions, which when executed by the controller, adjust a volumetric efficiency actuator to increase engine volumetric efficiency in response to engine intake manifold pressure greater than a threshold and a request to activate one or more engine cylinders when all engine cylinders are deactivated.
Dependencies are inferred from the claim text.