US 6,659,059 B1Granted

Variable displacement valve seat for internal combustion engines

AssigneeEnginTec, Corp

InventorReggie Dwayne Huff

Life of this patent

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Abstract

A variable displacement valve seat that consists of an annular ring which is affixed concentrically around a standard valve seat. The annular ring is affixed loosely to allow linear coaxial movement along the valve seat center-axis line. The movement is restricted to a small fraction of the valves actual displacement, approximately 12% or less, in the preferred embodiment. The annular ring is affixed to the valve seat insert installed in the cylinder head when used on the exhaust side. The annular ring is affixed to the head portion of the poppet valve itself when used on the intake side. The concept can provide an effective range of early closing times for the valves to control reversion. In addition, the actuation of the moveable seat is variable and automatic, and controlled by cycle exchange functions.

Claims7

Dependent claims

A variable displacement valve seat assembly effective for prevention of opposite directional flow of gases to or from the combustion chamber through the intake and exhaust ports of an internal combustion engine, said valve seat assembly comprising:

a) A base seat means designed to releasably seal an annular ring seat, said base seat means including a base seat mating surface,
b) an annular ring seat means, including both an inboard and outboard seat mating surface, said inboard seat mating surface designed to correspond with said base seat mating surface, said outboard mating surface designed to releasably seal an intake or exhaust port within the combustion chamber of an internal combustion engine,
c) a locked engagement means designed to lock the said annular ring seat means into releasably sealable engagement with said base seat means, said locked engagement means designed to allow controlled linear coaxial displacement of said annular ring seat means to a predetermined limit.

Dependencies are inferred from the claim text.

Facts

Application: 09/717,597Filed 21 Nov 2000 · us provisional application
Priority: 26 Nov 1999
Granted: 9 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

F01L 13/0015
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations: for optimising…
F01L 3/22
Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the…:…
F01L
Cyclically operating valves for machines or engines