US5562084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnosis control valve unit for evaporation purge system
Assignee: Kyosan Denki Co Ltd
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Filing: 1995-06-02
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Granted: 1996-10-08
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Expires: 2015-06-02
Abstract
Abstract A diagnosis control valve unit, provided in a vent pipe extending from a carbon canister, includes an air cleaner casing, an air cleaner filter and a diagnosis control valve substantially contained in the casing. A valve element, a valve seat and valve driving components of the diagnosis control valve are disposed in an internal space of the casing and the filter. The diagnosis control valve is firmly attached to an end of the casing. A valve element and a valve seat of a check valve are optionally provided in the casing, firmly attached to the opposite end of the casing. A vent pipe may be connected to that opposite end of the casing, in place of the check valve. The diagnosis control valve, check valve, or vent may be detachably connected to the casing.
Inventors
- 👤 Hiroshi Shimamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:46
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/0836
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
161 words
A diagnosis control valve unit for failure diagnosis of an evaporation purge system that conveys fuel evaporation from a fuel tank to a canister via an evaporation passage, the diagnosis control valve unit supplying the fuel evaporation captured by the canister into an intake passage of an internal combustion engine via a purge passage having a purge control valve, the diagnosis control valve unit comprising: a casing having first and second ends defining an internal space therebetween; an air cleaner disposed substantially within said internal space; a diagnosis control valve including a valve element, a valve driver and a valve seat that are disposed substantially inside said internal space, the diagnosis control valve being firmly connected to the first end of the casing; and a check valve including a valve element and a valve seat that are disposed substantially inside the casing, the check valve being firmly connected to the second end of the casing, remote from the diagnosis control valve.
Claim 2
Dependent Claim
161 words
A diagnosis control valve unit for failure diagnosis of an evaporation purge system that conveys fuel evaporation from a fuel tank to a canister via an evaporation passage, the diagnosis control valve unit supplying the fuel evaporation captured by the canister into an intake passage of an internal combustion engine via a purge passage having a purge control valve, the diagnosis control valve unit comprising: a casing having first and second ends defining an internal space therebetween; an air cleaner disposed substantially within said internal space; a diagnosis control valve including a valve element, a valve driver and a valve seat that are disposed substantially inside said internal space, the diagnosis control valve being firmly connected to the first end of the casing; and a check valve including a valve element and a valve seat that are disposed substantially inside the casing, the check valve being firmly connected to the second end of the casing, remote from the diagnosis control valve.
Claim 3
Dependent Claim
21 words
A control valve unit according to claim 1, wherein at least the diagnosis control valve is detachably connected to the casing.
Claim 4
Dependent Claim
141 words
A diagnosis control valve unit for failure diagnosis of an evaporation purge system that conveys fuel evaporation from a fuel tank to a canister via an evaporation passage, the diagnosis control valve unit supplying the fuel evaporation captured by the canister into an intake passage of an internal combustion engine via a purge passage having a purge control valve, the diagnosis control valve unit comprising: a casing having first and second ends defining an internal space therebetween; an air cleaner disposed substantially within the internal space; a diagnosis control valve including a valve element, a valve driver and a valve seat that are disposed substantially inside said internal space, the diagnosis control valve being firmly connected to the first end of the casing; and a vent passage connected to the second end of the casing, remote from the diagnosis control valve.
Claim 5
Dependent Claim
141 words
A diagnosis control valve unit for failure diagnosis of an evaporation purge system that conveys fuel evaporation from a fuel tank to a canister via an evaporation passage, the diagnosis control valve unit supplying the fuel evaporation captured by the canister into an intake passage of an internal combustion engine via a purge passage having a purge control valve, the diagnosis control valve unit comprising: a casing having first and second ends defining an internal space therebetween; an air cleaner disposed substantially within the internal space; a diagnosis control valve including a valve element, a valve driver and a valve seat that are disposed substantially inside said internal space, the diagnosis control valve being firmly connected to the first end of the casing; and a vent passage connected to the second end of the casing, remote from the diagnosis control valve.
Claim 6
Dependent Claim
21 words
A control valve unit according to claim 3, wherein at least the diagnosis control valve is detachably connected to the casing.
Claim 7
Dependent Claim
57 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends defining an internal space therebetween; an air filter disposed substantially within said internal space; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends in said internal space.
Claim 8
Dependent Claim
57 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends defining an internal space therebetween; an air filter disposed substantially within said internal space; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends in said internal space.
Claim 9
Dependent Claim
57 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends; an air filter disposed substantially within said casing; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends, wherein said first valve is positioned within said air filter.
Claim 10
Dependent Claim
57 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends; an air filter disposed substantially within said casing; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends, wherein said first valve is positioned within said air filter.
Claim 11
Dependent Claim
63 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends; an air filter disposed substantially within said casing; a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends; and a second valve adjacent said second end, said second valve being disposed substantially within said casing.
Claim 12
Dependent Claim
63 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends; an air filter disposed substantially within said casing; a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends; and a second valve adjacent said second end, said second valve being disposed substantially within said casing.
Claim 13
Dependent Claim
29 words
A control valve structure according to claim 7, wherein said second valve selectively communicates said air filter with one of an exhaust pipe and a clean air supply pipe.
Claim 14
Dependent Claim
27 words
A control valve structure according to claim 5, further comprising a vent pipe that conveys exhaust air from said casing and provides said casing with outside air.
Claim 15
Dependent Claim
67 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends: an air filter disposed substantially within said casing; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends, wherein said first valve is mounted on a valve seat of a first cap detachably connected to said first end.
Claim 16
Dependent Claim
67 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends: an air filter disposed substantially within said casing; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends, wherein said first valve is mounted on a valve seat of a first cap detachably connected to said first end.
Claim 17
Dependent Claim
23 words
A control valve structure according to claim 10, wherein said first cap and said first end are detachably connected using a snap fitting.
Claim 18
Dependent Claim
30 words
A control valve structure according to claim 10, wherein said first cap and said first end are detachably connected using mating threads of said first end and said first cap.
Claim 19
Dependent Claim
44 words
A control valve structure according to claim 10, wherein said first cap and said first end are detachably connected using at least one screw member and at least one hole defined in both a flanged end of said first end and said first cap.
Claim 20
Dependent Claim
25 words
A control valve structure according to claim 10, wherein said first cap and said first end are detachably connected using at least one retaining lug.
Claim 21
Dependent Claim
42 words
A control valve structure according to claim 14, wherein said retaining lug includes a hook that contacts at least one of a bottom surface of said first cap and an upper surface of a flange of said first end of said casing.
Claim 22
Dependent Claim
19 words
A control valve structure according to claim 10, further comprising a second valve detachably connected to said second end.
Claim 23
Dependent Claim
23 words
A control valve structure according to claim 16, wherein said first cap and said first end are detachably connected using a snap fitting.
Claim 24
Dependent Claim
108 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends: an air filter disposed substantially within said casing; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends, wherein said first end includes a first pipe that communicates with a canister, said first valve controlling communication between said canister and said air filter, said canister also communicating with a fuel tank and an engine intake to convey fuel vapor from said fuel tank to said engine intake and to convey exhaust air from said fuel tank to the atmosphere.
Claim 25
Dependent Claim
108 words
A control valve structure for an evaporation purge system comprising: a casing having first and second oppositely oriented ends: an air filter disposed substantially within said casing; and a first valve adjacent said first end, said first valve being disposed substantially between said first and second ends, wherein said first end includes a first pipe that communicates with a canister, said first valve controlling communication between said canister and said air filter, said canister also communicating with a fuel tank and an engine intake to convey fuel vapor from said fuel tank to said engine intake and to convey exhaust air from said fuel tank to the atmosphere.
References Cited (Backward Citations)
US4449506A
Cited
US4628887A
Cited
US4763635A
Cited
US4862856A
Cited
US4986246A
Cited
US5450833A
Cited
US5253629A
Cited
US5337721A
Cited
US5429097A
Cited
US5383437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-08 | 2000-04-08 | 2000-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-08 | 2004-04-08 | 2004-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-08 | 2008-04-08 | 2008-10-08 | $7700.00 | Window Closed / Lapsed |