IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0822644
(2010-06-24)
|
등록번호 |
US-8647751
(2014-02-11)
|
발명자
/ 주소 |
- Endicott, Mark Thomas
- Wischhusen, Randall John
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
13 |
초록
▼
During engine operation, valve retainers and valve springs are constantly rubbing and impacting each other resulting in heat and wear. The purpose of this invention is to provide a surface coating onto the valve retainer to reduce the friction with the valve spring and thus improve durability. Speci
During engine operation, valve retainers and valve springs are constantly rubbing and impacting each other resulting in heat and wear. The purpose of this invention is to provide a surface coating onto the valve retainer to reduce the friction with the valve spring and thus improve durability. Specifically, this invention teaches a method to thermally apply coatings to the surface of the valve retainer. Although typically fabricated from steel, the usage of lighter weight titanium valve retainers is increasing for high performance, or racing engines. The reduced mass allows valves to move more readily and requires less spring pressure to operate, producing more power and a faster revving engine, however titanium is typically not as wear resistant as the steel it replaces. In one embodiment, a porous molybdenum or other oleophilic metal is applied to the surface of the valve retainer. In another embodiment, hard coatings of cermets, carbides, and super alloys are applied as coatings to valve retainers.
대표청구항
▼
1. An automotive valve spring retainer comprising: an automotive valve spring retainer made of titanium, aluminum, an alloy of titanium, or an alloy of aluminum, wherein said valve spring retainer has a titanium, aluminum, alloy of titanium, or alloy of aluminum impact wearing surface; anda coating
1. An automotive valve spring retainer comprising: an automotive valve spring retainer made of titanium, aluminum, an alloy of titanium, or an alloy of aluminum, wherein said valve spring retainer has a titanium, aluminum, alloy of titanium, or alloy of aluminum impact wearing surface; anda coating consisting essential of the metal molybdenum or a molybdenum alloy, wherein said coating is porous and directly contacts said impact wearing surface;wherein said coating has been applied by thermal spraying using a thermal spray technique selected from the group consisting of high velocity oxy-fuel (HVOF), plasma, twin-wire arc, detonation gun, and cold spray, and wherein said valve spring retainer has not been heated during the application of said coating by more than 100° C. 2. The automotive valve spring retainer of claim 1, wherein surface finish of the coating is rough and porous. 3. The automotive valve spring retainer of claim 1, wherein said coating is impregnated with a polymer. 4. The automotive valve spring retainer of claim 1, wherein said impact wearing surface is a valve spring seating area. 5. The automotive valve spring retainer of claim 1, wherein said coating has no greater than a 95% apparent density ratio. 6. An automotive valve spring retainer comprising: an automotive valve spring retainer having a substrate of titanium, aluminum, an alloy of titanium, or an alloy of aluminum, and an impact wearing surface of titanium, aluminum, an alloy of titanium, or an alloy of aluminum; anda impact wearing surface coating consisting essentially of the metal molybdenum or a molybdenum alloy, wherein said coating has no greater than a 95% apparent density ratio and directly contacts said impact wearing surface. 7. The automotive valve spring retainer of claim 6, wherein surface finish of the coating is rough and porous. 8. The automotive valve spring retainer of claim 6, wherein said coating is impregnated with a polymer. 9. The automotive valve spring retainer of claim 6, wherein said impact wearing surface is a valve spring seating area. 10. The automotive valve spring retainer of claim 6, wherein said coating is the product of a thermal spray process, and wherein said valve spring retainer substrate has not been significantly heated by thermal spraying so as to alter the temper of the substrate. 11. The automotive spring retainer of claim 10, wherein said valve spring retainer substrate has not been heated by thermal spraying by more than 100° C. 12. An automotive valve ring retainer comprising: an automotive valve spring retainer having a substrate of titanium, aluminum, an alloy of titanium, or an alloy of aluminum, and an impact wearing surface of titanium, aluminum, an alloy of titanium, or an alloy of aluminum; anda impact wearing surface coating consisting primarily of zero-oxidation-state molybdenum, wherein said coating has no greater than a 95% apparent density ratio and directly contacts said impact wearing surface. 13. The automotive valve spring retainer of claim 12, wherein surface finish of the coating is rough and porous. 14. The automotive valve spring retainer of claim 12, wherein said coating is impregnated with a polymer. 15. The automotive valve spring retainer of claim 12, wherein said impact wearing surface is a valve spring seating area. 16. The automotive valve spring retainer of claim 12, wherein said coating is the product of a thermal spray process, and wherein said valve spring retainer substrate has not been significantly heated by thermal spraying so as to alter the temper of the substrate. 17. The automotive spring retainer of claim 16, wherein said valve spring retainer substrate has not been heated by thermal spraying by more than 100° C.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.