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US 11,313,287 B2Granted
System and method for gaspath actuators
AssigneeFord Global Technologies, LLC
InventorMichiel J. Van Nieuwstadt
Life of this patent
Estimating the term…
Abstract
Methods and systems for unsticking a stuck gaspath actuator are disclosed. In one embodiment, an engine operating method includes adjusting exhaust valve timing of one or more cylinders of an engine in response to an indication that a gaspath actuator is stuck in position. In this way, pressure waves in an exhaust manifold and/or an intake manifold may be generated, which may act to unstick the gaspath actuator.
Claims17
An engine operating method executable by a controller, comprising:
- adjusting exhaust valve timing of one or more cylinders of an engine in response to an indication that a gaspath actuator is stuck in position;
- and
- resuming a non-adjusted exhaust valve timing after a threshold number of cylinder firings has elapsed and/or after receiving an indication that the gaspath actuator is no longer stuck in position, where the non-adjusted exhaust valve timing is based on current engine operating parameters that do not include whether or not the gaspath actuator is stuck in position.
An engine system, comprising:
- an engine including a plurality of cylinders, each cylinder having a respective intake valve and a respective exhaust valve;
- a gaspath actuator comprising an exhaust gas recirculation valve or an exhaust gas recirculation cooler bypass valve;
- and
- a controller including executable instructions stored in non-transitory memory to, in response to an indication that the gaspath actuator is stuck in a position, adjust an opening timing and/or a closing timing of one or more of the respective exhaust valves, including selectively performing alternating rounds of different opening timings and/or the closing timings of one or more of the respective exhaust valves to generate pressure waves in an exhaust manifold of the engine and an intake manifold of the engine.
1 more element
A method executable by a controller, comprising:
- determining that a gaspath actuator of an engine system is stuck in position;
- and
- in response to the determining, generating one or more pressure waves in an exhaust manifold of an engine of the engine system and/or an intake manifold of the engine and propagating the one more pressure waves to the gaspath actuator, including generating one or more pressure waves in the intake manifold by holding each exhaust valve of each cylinder of the engine closed during a respective exhaust stroke and releasing exhaust gas to the intake manifold.
Dependencies are inferred from the claim text.