[특허]Fuel injector retainer assembly

International Engine Intellectual Property Company, LLC

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특허 상세정보

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Fuel injector retainer assembly

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-03700
미국특허분류(USC)	123/470; 123/509
출원번호	US-0368724 (2003-02-19)
발명자 / 주소	Seymour, II, Kenneth R. Yager, James H.
출원인 / 주소	International Engine Intellectual Property Company, LLC
인용정보	피인용 횟수 : 3 인용 특허 : 12

초록
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A fuel injector is operably couplable to a cylinder head, a clamping mechanism being in operable engagement with the fuel injector and the cylinder head for exerting a clamping force tending to hold the fuel injector in engagement with the cylinder head and includes a retainer assembly for retaining the fuel injector in operable coupling with a cylinder head, the retainer acting in cooperation with the clamping mechanism. The retainer assembly has a split dowel, the split dowel being statically engagable with the cylinder head by a clamping action of the clamping mechanism acting on the fuel injector and being engagable with a spring component for imparting a bias to the spring component. The spring component is in operable engagement with the fuel injector for imparting a reactive force to the fuel injector responsive to the bias imparted by the split dowel. And further including a friction coupling, the friction coupling fluidly coupling the split dowel and the fuel injector for generating a frictional force between the split dowel and the fuel injector, the frictional force tending to resist motion of the fuel injector relative to the cylinder head. A retainer assembly as indicated above and a method of resisting relative motion between a fuel injector and a cylinder head are further included.

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1. A retainer assembly for retaining a fuel injector in operable coupling with a cylinder head, the retainer acting in cooperation with a clamping mechanism, the clamping mechanism being in operable engagement with the fuel injector and the cylinder head for exerting a clamping force tending to hold the fuel injector in engagement with the cylinder head, comprising:first retainer means being statically engagable with the cylinder head by a clamping action of the clamping mechanism acting on the fuel injector and being engagable with a second retainer means for imparting a bias to the second retainer means; the second retainer means being in operable engagement with the fuel injector for imparting a reactive force to the fuel injector responsive to the bias imparted by the first retainer means; and frictional coupling means frictionally coupling the first retainer means and the fuel injector for generating a frictional force between the first coupling means and the fuel injector, the frictional force tending to resist motion of the fuel injector relative to the cylinder head. 2. The retainer assembly of claim 1 wherein the reactive force and the frictional force act substantially parallel to a fuel injector longitudinal axis.3. The retainer assembly of claim 1 wherein the frictional force is augmented by viscous force developed between the first retainer means and the fuel injector.4. The retainer assembly of claim 1 wherein the first retainer means is a split dowel and the second retainer means is a spring component, being a Belleville washer or a wavy washer.5. The retainer assembly of claim 4 wherein the split dowel has a first margin, an opposed second margin, and an injector receiver bore defined interior to a dowel wall.6. The retainer assembly of claim 5 wherein the fuel injector is receivable within the injector receiver bore and the first margin being statically engagable with a cylinder head surface.7. The retainer assembly of claim 6 wherein the second margin of the split dowel has a diameter that is slightly less than the diameter of an outer circumferential margin of the spring component, the split dowel second margin being engagable in compressive engagement with the spring component proximate the spring component outer circumferential margin.8. The retainer assembly of claim 7 wherein the spring component has an inner circumferential margin, the spring component being engagable in compressive engagement with a fuel injector surface proximate the spring component inner circumferential margin.9. The retainer assembly of claim 1 wherein a void is defined between the first retainer means and the fuel injector.10. The retainer assembly of claim 9 wherein the void is open to being filled by engine lubricating oil, the engine lubricating oil being the fluid coupling means.11. A retainer assembly for retaining a fuel injector in operable coupling with a cylinder head, the retainer acting in cooperation with a clamping mechanism, the clamping mechanism being in operable engagement with the fuel injector and the cylinder head for exerting a clamping force tending to hold the fuel injector in engagement with the cylinder head, comprising:a split dowel, the split dowel being statically engagable with the cylinder head by a clamping action of the clamping mechanism acting on the fuel injector and being engagable with a spring component for imparting a bias to the spring component; the spring component being in operable engagement with the fuel injector for imparting a reactive force to the fuel injector responsive to the bias imparted by the split dowel; and a friction coupling, the friction coupling fluidly coupling the split dowel and the fuel injector for generating a frictional force between the split dowel and the fuel injector, the frictional force tending to resist motion of the fuel injector relative to the cylinder head. 12. The retainer assembly of claim 11 wherein the reactive force and the frictional force act substantially parallel to a fuel injector longitudinal axis.13. The retainer assembly of claim 11 wherein the frictional force is augmented by viscous force developed between the first retainer means and the fuel injector.14. The retainer assembly of claim 13 wherein the reactive force, the viscous force and the frictional force act in cooperation to resist motion of the fuel injector relative to the cylinder head along the fuel injector longitudinal axis.15. The retainer assembly of claim 14 wherein the split dowel has a first margin, an opposed second margin, and an injector receiver bore defined interior to a dowel wall.16. The retainer assembly of claim 15 wherein the fuel injector is receivable within the injector receiver bore and the first margin being statically engagable with a cylinder head surface.17. The retainer assembly of claim 16 wherein the second margin of the split dowel has a diameter that is slightly less than the diameter of an outer circumferential margin of the spring component, the split dowel second margin being engagable in compressive engagement with the spring component proximate the spring component outer circumferential margin.18. The retainer assembly of claim 17 wherein the spring component has an inner circumferential margin, the spring component being engagable in compressive engagement with a fuel injector surface proximate the spring component inner circumferential margin.19. The retainer assembly of claim 11 wherein a void is defined between the split dowel and the fuel injector.20. The retainer assembly of claim 19 wherein the void is open to being filled by engine lubricating oil, the engine lubricating oil being the fluid coupling means.21. A fuel injector being operably couplable to a cylinder head, a clamping mechanism being in operable engagement with the fuel injector and the cylinder head for exerting a clamping force tending to hold the fuel injector in engagement with the cylinder head, comprising:a retainer assembly for retaining the fuel injector in operable coupling with a cylinder head, the retainer acting in cooperation with the clamping mechanism, the retainer assembly having; a split dowel, the split dowel being statically engagable with the cylinder head by a clamping action of the clamping mechanism acting on the fuel injector and being engagable with a spring component for imparting a bias to the spring component; the spring component being in operable engagement with the fuel injector for imparting a reactive force to the fuel injector responsive to the bias imparted by the split dowel; and a friction coupling, the friction coupling fluidly coupling the split dowel and the fuel injector for generating a frictional force between the split dowel and the fuel injector, the frictional force tending to resist motion of the fuel injector relative to the cylinder head. 22. The fuel injector of claim 21 wherein the reactive force and the frictional force act substantially parallel to a fuel injector longitudinal axis.23. The fuel injector of claim 21 wherein the frictional force is augmented by viscous force developed between the first retainer means and the fuel injector.24. The fuel injector of claim 23 wherein the reactive force, the viscous force and the frictional force act in cooperation to resist motion of the fuel injector relative to the cylinder head along the fuel injector longitudinal axis.25. The fuel injector of claim 24 wherein the split dowel has a first margin, an opposed second margin, and an injector receiver bore defined interior to a dowel wall.26. The fuel injector of claim 25 wherein the fuel injector is receivable within the injector receiver bore and the first margin being statically engagable with a cylinder head surface.27. The fuel injector of claim 26 wherein the second margin of the split dowel has a diameter that is slightly less than the diameter of an outer circumferential margin of the spring component, the split dowel second margin being engagable in compressive engagement with the spring component proximate the spring component outer circumferential margin.28. The fuel injector of claim 27 wherein the spring component has an inner circumferential margin, the spring component being engagable in compressive engagement with a fuel injector surface proximate the spring component inner circumferential margin.29. The fuel injector of claim 21 wherein a void is defined between the split dowel and the fuel injector.30. The fuel injector of claim 29 wherein the void is open to being filled by engine lubricating oil, the engine lubricating oil being the fluid coupling means.

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Fuel injector retainer assembly

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Fuel injector retainer assembly

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