US2008152491A1PendingUtilityA1

Coatings for use in fuel system components

35
Individually held — no corporate assignee on recordPriority: Dec 26, 2006Filed: Feb 6, 2007Published: Jun 26, 2008
Est. expiryDec 26, 2026(~0.4 yrs left)· nominal 20-yr term from priority
Inventors:Lucy V. Davies
F04B 53/10F02M 2200/9038F05C 2253/12F02M 59/445F02M 59/366F04B 53/16C23C 14/0641Y10T29/49229F02M 59/466C23C 14/024F05C 2203/083C23C 14/0605
35
PatentIndex Score
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Claims

Abstract

A fuel pump assembly is provided. The assembly includes a first pump component having a first substrate and a first coating disposed on the first substrate. The assembly further includes at least one second pump component having a second substrate and a second coating disposed on the second substrate, wherein the first and second coatings are configured to repeatedly impact one another. In addition, the first coating may be selected from the group consisting of metal nitrides and diamond like carbon, and the second coating may be selected from the group consisting of metal nitrides and diamond like carbon.

Claims

exact text as granted — not AI-modified
1 . A fuel pump assembly comprising:
 a first fuel pump component having a first substrate and a first coating disposed on the first substrate;   at least one second fuel pump component having a second substrate and a second coating disposed on the second substrate, wherein the first and second coatings are configured to repeatedly impact one another; and   wherein the first coating is selected from the group consisting of metal nitrides and diamond like carbon, and the second coating is selected from the group consisting of metal nitrides and diamond like carbon.   
     
     
         2 . The fuel pump assembly of  claim 42 , wherein the first component includes a nail valve and the second component includes a nail valve body. 
     
     
         3 . The fuel pump assembly of  claim 1 , wherein the first coating and second coating have a thickness range between about 0.5 microns and about 1.7 microns. 
     
     
         4 . The fuel pump assembly of  claim 1 , wherein the first coating and second coating have a thickness range between about 0.5 microns and about 1.0 microns. 
     
     
         5 . The fuel pump assembly of  claim 1 , wherein the first coating is selected from the group consisting of chromium nitride, zirconium nitride, molybdenum nitride, titanium-carbon-nitride, and zirconium-carbon-nitride. 
     
     
         6 . The fuel pump assembly of  claim 5 , wherein the second coating is selected from the group consisting of chromium nitride, zirconium nitride, molybdenum nitride, titanium-carbon-nitride, and zirconium-carbon-nitride. 
     
     
         7 . The fuel pump assembly of  claim 6 , wherein the first coating and the second coating include the same coating material. 
     
     
         8 . The fuel pump assembly of  claim 1 , wherein the first coating includes chromium nitride and the second coating includes chromium nitride. 
     
     
         9 . The fuel pump assembly of  claim 1 , wherein the first coating is selected from the group consisting of titanium containing diamond like carbon, chromium containing diamond like carbon, and tungsten containing diamond like carbon. 
     
     
         10 . The fuel pump assembly of  claim 9 , wherein the second coating is selected from the group consisting of titanium containing diamond like carbon, chromium containing diamond like carbon, and tungsten containing diamond like carbon. 
     
     
         11 . The fuel pump assembly of  claim 1 , wherein at least one of the first component and the second component further includes a bond layer between the substrate and the coating. 
     
     
         12 . The fuel pump assembly of  claim 11 , wherein the bond layer is a chromium layer having a thickness in the range of between about 0.05 microns and about 0.50 microns. 
     
     
         13 . The fuel pump assembly of  claim 1 , wherein the first component and the second component are adapted to control the flow of a fuel. 
     
     
         14 . A method of producing a fuel system pump assembly, comprising:
 selecting a first fuel system component substrate;   selecting a second fuel system component substrate;   producing a first coating on the first substrate and a second coating on the second substrate, wherein the first coating is selected from the group consisting of metal nitrides and diamond like carbon, and the second coating is selected from the group consisting of metal nitrides and diamond like carbon; and   assembling the fuel system assembly such that the first and second coatings are configured to repeatedly impact one another.   
     
     
         15 . The method of  claim 14 , wherein the first component substrate forms part of a nail valve and the second component substrate forms part of a nail valve body. 
     
     
         16 . The method of  claim 14 , wherein the first coating is selected from the group consisting of chromium nitride, zirconium nitride, molybdenum nitride, titanium-carbon-nitride, and zirconium-carbon-nitride. 
     
     
         17 . The method of  claim 16 , wherein the second coating is selected from the group consisting of chromium nitride, zirconium nitride, molybdenum nitride, titanium-carbon-nitride, and zirconium-carbon-nitride. 
     
     
         18 . The method of  claim 14 , wherein the first coating includes chromium nitride and the second coating includes chromium nitride. 
     
     
         19 . The method of  claim 14 , wherein the first coating is selected from the group consisting of titanium containing diamond like carbon, chromium containing diamond like carbon, and tungsten containing diamond like carbon. 
     
     
         20 . The method of  claim 14 , wherein the first coating and the second coating are produced using a physical vapor deposition process. 
     
     
         21 . The method of  claim 20 , wherein the physical vapor deposition process includes a sputtering process. 
     
     
         22 . A method of controlling wear in a fuel pump assembly comprising a first fuel pump component substrate, a second fuel pump component substrate, a first coating on the first substrate, and a second coating on the second substrate, wherein the first coating is selected from the group consisting of metal nitrides and diamond like carbon and the second coating is selected from the group consisting of metal nitrides and diamond like carbon, the method comprising:
 operating the fuel pump assembly such that the first coating repeatedly impacts the second coating; and   supplying fuel to the pump assembly.   
     
     
         23 . The method of  claim 22 , wherein the fuel includes Toyu fuel. 
     
     
         24 . The method of  claim 22 , wherein the fuel includes at least 10% by volume methyl soyate. 
     
     
         25 . The method of  claim 22 , wherein the fuel includes at least 20% by volume methyl soyate. 
     
     
         26 . The method of  claim 22 , wherein the fuel includes Toyu fuel and methyl soyate. 
     
     
         27 . The method of  claim 26 , wherein at least one of the first coating and the second coating includes chromium nitride. 
     
     
         28 . The method of  claim 27 , wherein the first coating and the second coating include chromium nitride. 
     
     
         29 . The method of  claim 22 , wherein at least one of the first coating and the second coating is selected from the group consisting of zirconium nitride, molybdenum nitride, titanium-carbon-nitride, zirconium-carbon-nitride, titanium containing diamond like carbon, chromium containing diamond like carbon, and tungsten containing diamond like carbon. 
     
     
         30 . The method of  claim 22 , wherein the fuel is selected from the group consisting of ASTM D975 Grade 2D diesel, low-sulfur fuel, K1 fuel, and JP8 fuel. 
     
     
         31 . An assembly having two or more components configured to repeatedly impact one another, comprising:
 a first component having a first substrate and a first coating disposed on the first substrate;   at least one second component having a second substrate and a second coating disposed on the second substrate, wherein the first and second coatings are configured to repeatedly impact one another; and   wherein the first coating is selected from the group consisting of metal nitrides and diamond like carbon, and the second coating is selected from the group consisting of metal nitrides and diamond like carbon.   
     
     
         32 . The assembly of  claim 31 , wherein the first coating and second coating have a thickness range between about 0.5 microns and about 1.7 microns. 
     
     
         33 . The assembly of  claim 31 , wherein the first coating is selected from the group consisting of chromium nitride, zirconium nitride, molybdenum nitride, titanium-carbon-nitride, and zirconium-carbon-nitride. 
     
     
         34 . The assembly of  claim 33 , wherein the second coating is selected from the group consisting of chromium nitride, zirconium nitride, molybdenum nitride, titanium-carbon-nitride, and zirconium-carbon-nitride. 
     
     
         35 . The assembly of  claim 34 , wherein the first coating and the second coating include the same coating material. 
     
     
         36 . The assembly of  claim 31 , wherein the first coating includes chromium nitride and the second coating includes chromium nitride. 
     
     
         37 . The assembly of  claim 31 , wherein the first coating is selected from the group consisting of titanium containing diamond like carbon, chromium containing diamond like carbon, and tungsten containing diamond like carbon. 
     
     
         38 . The assembly of  claim 37 , wherein the second coating is selected from the group consisting of titanium containing diamond like carbon, chromium containing diamond like carbon, and tungsten containing diamond like carbon. 
     
     
         39 . The assembly of  claim 31 , wherein at least one of the first component and the second component further includes a bond layer between the substrate and the coating. 
     
     
         40 . The assembly of  claim 39 , wherein the bond layer is a chromium layer having a thickness in the range of between about 0.05 microns and 0.50 microns. 
     
     
         41 . The assembly of  claim 31 , wherein the first component and the second component are adapted to control the flow of a fuel. 
     
     
         42 . The method of  claim 1 , wherein the fuel system assembly includes a fuel injector. 
     
     
         43 . The method of  claim 14 , wherein the fuel system assembly includes a fuel injector. 
     
     
         44 . The method of  claim 14 , wherein the fuel system assembly includes a fuel injector valve.

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