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US 8,820,279 B2Granted
Engine including oil pressure passage with air bleed
AssigneeGM Global Technology Operations LLC
InventorsKevin L. Roussey, Patrick J. Tow, Robert L. Jacques
Life of this patent
Estimating the term…
Abstract
An engine assembly includes an engine structure, an air bleed valve and a hydraulically actuated engine component. The engine structure defines a first oil supply passage. The air bleed valve is in communication with the first oil supply passage and purges air from pressurized oil within the first oil supply passage. The hydraulically actuated engine component is in communication with the oil supply passage.
Claims7
A cylinder head cover assembly comprising:
- a cylinder head cover defining an oil supply passage and an air purge passage;
- and
- an air bleed valve located within the oil supply passage and including an air inlet in communication with the oil supply passage and an air outlet in communication with the air purge passage in the cylinder head cover, the air bleed valve adapted to purge air from pressurized oil within the oil supply passage, wherein the air inlet of the air bleed valve faces an interior region of the cylinder head cover and the air outlet of the air bleed valve faces away from the interior region of the cylinder head cover;
- and
- an oil control valve coupled to the cylinder head cover and in communication with the oil supply passage, the oil control valve including an inlet in communication with the oil supply passage and an outlet adapted to selectively provide pressurized oil from the oil passage to a hydraulically actuated engine component.
2 more elements
An engine assembly comprising:
- an engine block defining a cylinder bore;
- a cylinder head coupled to the engine block and defining an intake port in communication with the cylinder bore;
- an intake valve located within the intake port;
- a multi-step valve lift mechanism supported on the cylinder head and engaged with the intake valve;
- a camshaft supported for rotation on the cylinder head and engaged with the multi-step valve lift mechanism;
- a cylinder head cover coupled to the cylinder head and defining a first oil supply passage;
- an air bleed valve in communication with the first oil supply passage and adapted to purge air from pressurized oil within the first oil supply passage;
- and
- an oil control valve in communication with the first oil supply passage and the multi-step valve lift mechanism and adapted to selectively provide communication between the first oil passage and the multi-step valve lift mechanism to switch the multi-step valve lift mechanism between a first mode providing a first valve lift and a second mode providing a second valve lift higher than the first valve lift.
6 more elements
Dependencies are inferred from the claim text.