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US 9,068,477 B2Granted
Valve system
AssigneeFord Global Technologies, LLC
InventorCharles Fabros
Life of this patent
Estimating the term…
Abstract
A valve system for providing closing force to one or more valves of an engine is provided. In one example, the system comprises a first tappet bore in fluid communication with a second tappet bore via a bidirectional oil passage. The system may provide valve closing forces to assist in the closing of valves coupled to the tappet bores, lowering required valve spring forces.
Claims7
A method for controlling valve operation, comprising:
- pumping oil from a first tappet of a first cylinder to a second tappet of a second cylinder, and from the second tappet to the first tappet, without returning the oil to an oil sump, the first tappet and a valve of the first cylinder arranged in a first bore and the second tappet and a valve of the second cylinder arranged in a second bore.
Dependencies are inferred from the claim text.