Poppet for an integrated pressure management apparatus and fuel system and method of minimizing resonance
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-017/19
F16K-017/18
출원번호
US-0794087
(2004-03-08)
발명자
/ 주소
Perry,Paul
Veinotte,Andre
출원인 / 주소
Siemens VDO Automotive, Inc.
인용정보
피인용 횟수 :
4인용 특허 :
111
초록▼
An integrated pressure management apparatus, system and method for minimizing resonance of a poppet. A housing defines a fluid communication passage between ports. The housing includes a first portion, which extends along an axis, and has a first surface parallel to the axis. A poppet is movable bet
An integrated pressure management apparatus, system and method for minimizing resonance of a poppet. A housing defines a fluid communication passage between ports. The housing includes a first portion, which extends along an axis, and has a first surface parallel to the axis. A poppet is movable between a first configuration that prevents fluid communication between the ports, and a second configuration that permits fluid communication between the ports. The poppet includes a second portion. The second portion is translatable along the axis relative to the housing, and includes a tubular stem that has a second surface parallel to the axis. The second portion nests with the first portion so as to define a gap between the first and second surfaces. The first and second portions define a chamber, and the gap restricts fluid flow between the fluid communication passage and the chamber.
대표청구항▼
What is claimed is: 1. An integrated pressure management apparatus comprising: a housing defining a fluid communication passage between first and second fluid ports, the housing including a first portion extending along an axis, the first portion having a first surface parallel to the axis; a poppe
What is claimed is: 1. An integrated pressure management apparatus comprising: a housing defining a fluid communication passage between first and second fluid ports, the housing including a first portion extending along an axis, the first portion having a first surface parallel to the axis; a poppet being movable between first and second configurations, the first configuration preventing fluid communication between the first and second ports, and the second configuration permitting fluid communication between the first and second ports, the poppet including: a second portion being translatable along the axis relative to the housing, the second portion including a tubular stem having a second surface parallel to the axis, the second portion nesting with the first portion so as to define a first gap between the first and second surfaces; and a head fixed to the tubular stem, the head contiguously engaging the housing so as to occlude the fluid communication passage when the poppet is in the first configuration; and a chamber being defined by the first and second portions, and the first gap communicating fluid between the chamber and the fluid communication passage. 2. The integrated pressure management apparatus according to claim 1, wherein the first portion comprises a post projecting from the housing along the axis, the first surface comprises an exterior surface of the post, the tubular stem comprises inside and outside surfaces parallel to the axis, and the second surface comprises the inside surface of the tubular stem, such that the chamber is defined inside the tubular stem. 3. The integrated pressure management apparatus according to claim 2, wherein the post extends along the axis to an exterior end face, the tubular stem extends along the axis to a closure defining an inside end face, and a chamber having a volume that is defined by the exterior end face of the post and the inside surface and inside end face of the tubular stem. 4. The integrated pressure management apparatus according to claim 3, wherein the first gap and the chamber comprise a dashpot damping resonance of the poppet in the second configuration. 5. The integrated pressure management apparatus according to claim 3, wherein the volume of the chamber varies in response to the tubular stem telescoping relative to the post. 6. The integrated pressure management apparatus according to claim 3, wherein the closure is spaced along the axis with respect to the head. 7. The integrated pressure management apparatus according to claim 2, wherein the housing comprises an internal wall extending along and surrounding the axis, the internal wall defines an interior surface parallel to the axis, and the internal wall receives the tubular stem so as to define a second gap between the interior surface of the wall and the outside surface of the tubular stem. 8. The integrated pressure management apparatus according to claim 7, wherein the second gap communicates fluid between the first gap and the fluid communication passage. 9. The integrated pressure management apparatus according to claim 7, wherein the interior surface of the internal wall, the second gap, the outside surface of the tubular stem, the inside surface of the tubular stem, the first gap, and the exterior surface of the post comprise concentric annuli. 10. The integrated pressure management apparatus according to claim 9, further comprising: a resilient element biasing the poppet toward the first configuration. 11. The integrated pressure management apparatus according to claim 10, wherein the resilient element comprises an annular compression spring extending along the axis between first and second ends, the first end contiguously engaging the housing, and the second end contiguously engaging the head, the annular compression spring being disposed concentrically about the interior wall of the housing. 12. The integrated pressure management apparatus according to claim 1, wherein the poppet comprises injection molded plastic having thin molded walls so as to minimize resonance of the poppet by minimizing mass of the poppet. 13. The integrated pressure management apparatus according to claim 1, wherein the housing comprises a seat, and the head contiguously engages the seat in the first configuration. 14. The integrated pressure management apparatus according to claim 1, wherein the fuel vapor pressure management apparatus excludes an electromechanical actuator. 15. A fuel system for supplying fuel to an internal combustion engine, the fuel system comprising: a fuel tank having a headspace; a fuel vapor collection canister having first and second sides, the first side being in fluid communication with the headspace; an intake manifold of the internal combustion engine; a purge valve including an inlet and an outlet, the inlet being in fluid communication with the first side of the fuel vapor collection canister and the outlet being in fluid communication with the intake manifold; and a fuel vapor pressure management apparatus including first and second ports, the first port being in fluid communication with the second side of the fuel vapor collection canister, and the second port being in fluid communication with atmosphere, a first arrangement of the fuel vapor pressure management apparatus occurs when there is a first negative pressure level in the fuel vapor collection canister relative to atmosphere, a second arrangement of the fuel vapor pressure management apparatus permits a first fluid flow from atmosphere to the fuel vapor collection canister when there is a second negative pressure level less than the first negative pressure level, and a third arrangement of the fuel vapor pressure management apparatus permits a second fluid flow from the fuel vapor collection canister to atmosphere when there is a positive pressure in the fuel vapor collection canister relative to atmosphere, the fuel vapor pressure management apparatus including: a housing defining a fluid communication passage extending between the first and second ports, the housing including a first portion extending along an axis, the first portion having a first surface parallel to the axis; and a poppet being movable between first and second configurations, the first configuration preventing fluid communication between the first and second ports in the first arrangement, and the second configuration permitting fluid communication between the first and second ports in the second and third arrangements, the poppet including: a second portion being translatable along the axis relative to the housing, the second portion including a tubular stem having a second surface parallel to the axis, the second portion nesting with the first portion so as to define a gap between the first and second surfaces; and a head fixed to the tubular stem, the head contiguously engaging the housing so as to occlude the fluid communication passage in the first arrangement. 16. The fuel system according to claim 15, wherein the first portion comprises a post projecting from the housing along the axis, the first surface comprises an exterior surface of the post, the tubular stem comprises inside and outside surfaces parallel to the axis, and the second surface comprises the inside surface of the tubular stem. 17. The fuel system according to claim 16, wherein the post extends along the axis to an exterior end face, the tubular stem extends along the axis to a closure defining an inside end face, and a chamber is defined by the exterior end face of the post and the inside surface and inside end face of the tubular stem. 18. The fuel system according to claim 17, wherein the first gap and the chamber comprise a dashpot damping resonance of the poppet in the second arrangement. 19. The fuel system according to claim 15, wherein the fuel vapor pressure management apparatus comprises a diaphragm having a peripheral portion fixed with respect to the housing and a central portion moving the poppet to the second configuration in the second and third arrangements. 20. The fuel system according to claim 15, wherein the fuel vapor pressure management apparatus comprises a switch signaling the first negative pressure level. 21. The fuel system according to claim 20, further comprising: an engine control unit operatively connected to the purge valve and to the switch. 22. The fuel system according to claim 15, wherein the fuel vapor pressure management apparatus comprises a resilient element biasing the head toward the first configuration. 23. A method of using naturally forming vacuum to evaluate a fuel system supplying fuel to an internal combustion engine including an intake manifold, the fuel system including a fuel tank having a headspace, and a fuel vapor collection canister having first and second sides, the first side of the fuel vapor collection canister being in fluid communication with the headspace and with a purge valve, the method comprising: coupling a fuel vapor pressure management apparatus in fluid communication between the second side of fuel vapor collection canister and atmosphere, the fuel vapor management apparatus including: a housing defining a fluid communication passage extending between first and second fluid ports; and a poppet being movable between first and second configurations with respect to the housing, the first configuration preventing fluid communication between the first and second ports, and the second configuration permitting fluid communication between the first and second ports; damping resonance of the poppet in the second configuration. 24. The method according to claim 23, wherein the damping resonance comprises operatively coupling a dashpot between the poppet and the housing. 25. The method according to claim 23, further comprising: excluding from the fuel vapor management apparatus an electromechanical actuator. 26. The method according to claim 23, further comprising: detecting in the first configuration of the poppet the vacuum that naturally forms in the headspace. 27. The method according to claim 26, wherein the detecting comprises sensing at the second side of fuel vapor collection canister a first negative pressure level relative to atmosphere. 28. The method according to claim 27, further comprising: relieving excess negative pressure below the first negative pressure level relative to atmosphere. 29. The method according to claim 23, further comprising: relieving positive pressure above a second pressure level relative to atmosphere.
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