Fuel system components

Patent metadata

Field	Value
Publication number	US-11873547-B2
Application number	US-202318299934-A
Country	US
Kind code	B2
Filing date	Apr 13, 2023
Priority date	Oct 15, 2020
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

A fuel system, comprising at least one fuel component formed of a steel alloy comprising 0.01-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum, wherein the at least one fuel component is configured to come in contact with fuel when fuel is ran through the fuel system.

First claim

What is claimed is:

1. A fuel system, comprising:
at least one fuel component formed of a steel alloy comprising 0.01-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum, wherein the at least one fuel component is configured to come in contact with fuel when fuel is passed through the fuel system.

2. The fuel system of claim 1 , wherein the at least one fuel component has a hardness of approximately 900-1100 HK500gf (Knoop Hardness).

3. The fuel system of claim 1 , wherein the steel alloy comprises 0.01-0.12 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-5.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.100 wt. % vanadium, and 2.000-2.400 wt. % aluminum.

4. The fuel system of claim 1 , wherein the steel alloy comprises 0.16-0.20 wt. % carbon, 0.0-0.20 wt. % silicon, 0.20-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 5.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.450-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum.

5. The fuel system of claim 1 , wherein the steel alloy comprises 0.25-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.20-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 5.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.450-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum.

6. The fuel system of claim 1 , wherein the at least one fuel component has a surface layer comprised of a nitride compound layer.

7. The fuel system of claim 1 , wherein the at least one fuel component includes at least one of an injector control valve seat, an injector needle seal, an injector needle, an injector nozzle and a pump tappet barrel.

8. A method of manufacturing a component of a fuel system, comprising:
rough machining an annealed steel alloy mass comprising 0.01-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum to form the component;
hardening a core of the component;
nitriding the component after hardening the core of the component; and
finish machining the component.

9. The method of claim 8 , wherein the step of finish machining the component includes at least one of grinding, electrical discharge machining, abrasive flow machining, laser drilling, and marking.

10. The method of claim 8 , wherein the annealed steel alloy has a density of 7,500-7,600 kg/m 3 .

11. The fuel system of claim 10 , wherein the density is 7,582 kg/m 3 .

12. The method of claim 8 , wherein a hardness of the annealed steel alloy mass is approximately 240-350 HV.

13. The method of claim 8 , wherein a hardness of the component after hardening the core is approximately 505-790 HV.

14. The method of claim 8 , wherein a hardness of the component after nitriding the component is approximately 905-1340 HV.

15. The method of claim 8 , wherein the step of hardening the core includes at least one of quenching, tempering, and age hardening of the component.

16. The method of claim 8 , wherein the annealed steel alloy mass comprises 0.01-0.12 wt. % carbon, 0.0-0.20 wt. % silicon, 0.15-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 4.80-5.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.0-0.100 wt. % vanadium, and 2.000-2.400 wt. % aluminum.

17. The method of claim 8 , wherein the annealed steel alloy mass comprises 0.16-0.20 wt. % carbon, 0.0-0.20 wt. % silicon, 0.20-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 5.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.450-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum.

18. The method of claim 8 , wherein the steel alloy comprises 0.25-0.31 wt. % carbon, 0.0-0.20 wt. % silicon, 0.20-0.50 wt. % manganese, 0.0-0.015 wt. % phosphorous, 0.0-0.001 wt. % sulfur, 4.80-5.20 wt. % chromium, 5.80-6.20 wt. % nickel, 0.60-0.80 wt. % molybdenum, 0.450-0.550 wt. % vanadium, and 2.000-2.400 wt. % aluminum.

Assignees

• Cummins Inc

Inventors

• Su Yang
• Huang Xiaoli
• Ferdon Steven E
• Phillips Ross A
• Thete Manoj M
• Wright Brian J

Classifications

• C22C38/44 Primary

  with molybdenum or tungsten · CPC title

• C21D1/18

  Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62) · CPC title

• C22C38/04

  containing manganese · CPC title

• C22C38/06

  containing aluminium · CPC title

• C22C38/46

  with vanadium · CPC title