Coking-resistant bearing
AssigneeDelphi Technologies, Inc.
InventorRaul Armando Bircann
Life of this patent
Estimating the term…
Abstract
An EGR valve for use in an engine includes a valve body defining an internal passage for the passage of exhaust gas through the valve and a bearing supported in the passage having a bearing surface including an end portion adjacent to the internal passage, with at least one groove formed within the bearing surface sufficient to create an air pocket that resists fluid intrusion into the bearing. A valve member is movable in the valve body for controlling exhaust gas flow through the passage and includes a shaft supported for reciprocating motion along the bearing surface of the bearing. A lubricious insert may also be provided in the bearing surface of the bearing adjacent the end portion of the bearing surface for inhibiting the formation of coking within the bearing.
Claims4
An EGR valve for use in an engine, comprising:
- a valve body defining an internal passage for the passage of exhaust gas through the valve;
- a bearing supported in the passage having a bearing surface including an end portion adjacent to said internal passage, the end portion of the bearing surface including at least one axial groove disposed therein open at the end portion and defining an air pocket that resists fluid intrusion into said bearing;
- a valve member movable in the valve body for controlling exhaust gas flow through the passage, the valve member including a shaft supported for reciprocating motion along the bearing surface of the bearing.
An EGR valve for use in an engine, comprising:
- a valve body defining an internal passage for the passage of exhaust gas through the valve;
- a bearing supported in the passage having a bearing surface, and a lubricious bearing insert disposed within the bearing surface;
- a valve member movable in the valve body for controlling exhaust gas flow through the passage, the valve member including a shaft supported for reciprocating motion along the bearing surface of the bearing;
- wherein the bearing surface of the bearing includes an end portion adjacent to the internal passage defined by the valve body, said end portion of the bearing surface including a plurality of axial grooves formed therein and defining air pockets that resist fluid intrusion.
Dependencies are inferred from the claim text.