Heated PCV valve and hose assemblies
View Patent ↗A PCV valve assembly including housing having a fluid inlet and outlet. A poppet valve is disposed in the housing between the fluid inlet and outlet and is moveable in an axial direction between a plurality of positions. A heating element having a positive temperature coefficient material is supported in the housing in proximity to at least a portion of the valve for automatically heating the valve in response to a given voltage. The material produces a first heat in response to a first temperature and the given voltage. The material produces a second heat less than the first heat produced in response to the given voltage and a second temperature greater than the first temperature. That is, the positive temperature coefficient material automatically regulates the flow of current and the temperature produced without the need of a thermostat in response to the same voltage. A hose may also be used defining an air passageway and having a length is connected between the fluid outlet and an intake manifold respectively at first and second connections. The hose has a heating element arranged substantially along the length for applying heat to the bare passageway. An electrical device is connected to the heating element for providing power to the heating element to generate heat. In this manner, air entering the intake manifold in proximity to the throttle blade is heated to maintain a higher temperature to prevent blade icing.
1. A positive crankcase ventilation valve assembly comprising:
a housing having a fluid inlet, a fluid outlet and an intermediate portion between the fluid inlet and the fluid outlet;
a poppet valve disposed in said housing between said fluid inlet and said fluid outlet and movable in an axial direction between a plurality of positions; and
a tubular heating element arranged about at least a portion of the value, and having a positive temperature coefficient material within said intermediate portion that is supported by said housing in proximity to at least a portion of said valve for automatically heating said valve in response to a given voltage, said positive temperature coefficient material producing a first heat in response to a first temperature and said given voltage and producing a second heat in response to a second temperature and said given voltage, wherein said second heat is less than said first heat and said second temperature is greater than said first temperature.
2. The assembly according to claim 1 , wherein said heating element includes a tubular member and said positive temperature coefficient material is provided by a foil secured to said tubular member.
3. The assembly according to claim 2 , wherein said tubular member is constructed from aluminum.
4. The assembly according to claim 1 , further including a connector extending from said housing, and an electrical contact extends from said heating element into said connector.
5. The assembly according to claim 1 , wherein said housing includes a first housing portion and a second housing portion secured about said valve, wherein said heating element is supported by one of said first housing portion and said second housing portion.
6. The assembly according to claim 5 , wherein said first housing portion is a valve cover and said second housing portion is a cap supporting said heating element and removably secured to said valve cover.
7. The assembly according to claim 6 , wherein said valve cover includes a hole with a first cammed surface and said cap includes a second cammed surface that coacts with said first cammed surface to secure said cap to said valve cover.
8. The assembly according to claim 5 , wherein said valve is contained in a secondary housing retained between said first housing portion and said second housing portion, wherein said heating element is arranged about at least a portion of said secondary housing.
9. The assembly according to claim 1 , wherein said positive temperature coefficient material is a wire.
10. The assembly as recited in claim 1 , wherein said positive temperature coefficient material is a loop that extends between terminal ends of said heating element.
11. The assembly as recited in claim 10 , wherein said loop comprises a first loop section and a second loop section that extends parallel to said first loop section and to said axial direction.
12. The assembly as recited in claim 10 , wherein said loop is disposed on a curved surface.
13. The assembly as recited in claim 10 , wherein said terminal ends are disposed on a curved surface.
14. A positive crankcase ventilation valve assembly comprising:
a housing having a fluid inlet, a fluid outlet and an intermediate portion between the fluid inlet and the fluid outlet;
a poppet valve disposed in said housing between said fluid inlet and said fluid outlet and movable in an axial direction between a plurality of positions; and
a heating element within said intermediate portion arranged about to at least a portion of said valve for heating said valve.
15. The assembly according to claim 14 , wherein said tubular memberis constructed from aluminum as recited in claim 16 , wherein said resistance element is disposed on a curved surface.
16. The assembly according to claim 14 , further including a connector extending from said housing, and an electrical contact extends from said heating element into said connector.
17. The assembly according to claim 14 , wherein said housing includes a first housing portion and a second housing portion secured about said valve, wherein said heating element is supported by one of said first housing portion and said second housing portion. tubular member is constructed from aluminum.
18. The assembly according to claim 17 , wherein said first housing portion is a valve cover and said second housing portion is a cap supporting said heating element and removably secured to said valve cover.
19. The assembly according to claim 18 , wherein said valve cover housing includes a first housing portion and a second housing portion secured about said valve, wherein said heating element is supported by one of said first housing portion and said second housing portion.
20. The assembly according to claim 19 , wherein said first housing portion is a valve cover and said second housing portion is a cap supporting said heating element and removably secured to said valve cover.
21. The assembly according to claim 20 , wherein said valve cover includes a hole with a first cammed surface and said cap includes a second cammed surface that coacts with said first cammed surface to secure said cap to said valve cover.
22. The assembly according to claim 19 , wherein said valve is contained in a secondary housing retained between said first housing portion and said second housing portion, wherein said heating element is arranged about at least a portion of said secondary housing.
23. The assembly according to claim 16 , wherein said heating element is supported by said housing.
24. A positive crankcase ventilation valve assembly comprising:
a housing having a fluid inlet and a fluid outlet;
a poppet valve disposed in said housing between said fluid inlet and said fluid outlet and movable in an axial direction between a plurality of positions; and
a tubular heating element that extends at least partially about a portion of said valve for heating said valve.
25. The assembly as recited in claim 24 , wherein said heating element comprises a positive temperature coefficient material that produces a first heat in response to a first temperature and a given voltage and produces a second heat in response to a second temperature and said given voltage, wherein said second heat is less than said first heat and said second temperature is greater than said first temperature.