US3565109A - Fuel emission control system - Google Patents
Fuel emission control system Download PDFInfo
- Publication number
- US3565109A US3565109A US3565109DA US3565109A US 3565109 A US3565109 A US 3565109A US 3565109D A US3565109D A US 3565109DA US 3565109 A US3565109 A US 3565109A
- Authority
- US
- United States
- Prior art keywords
- housing
- valve
- diaphragm
- diaphragms
- spring means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 20
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 239000002828 fuel tank Substances 0.000 abstract description 3
- 241001653634 Russula vesca Species 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87153—Plural noncommunicating flow paths
- Y10T137/87161—With common valve operator
Definitions
- ABSTRACT A fuel emission control system comprising a gas 251/612 tank and interconnecting lines 1th an inflatable tank and a [5 1] Int. Cl ..F02n1 59/00 pressure responsive valve which is operable to vent the excess [50] Field ofSearcb 251/6l.0- pressure in the fuel tank and the inflatable tank to the atmosphere through emission absorptive material.
- This invention relates to fuel emission control systems.
- One of the problems with automotive fuel systems is the evaporative emission of fuel to the atmosphere. This may 1 occur due to vapors from the fuel tank, which vapors may be emitted when the engine is excessively warm during operation or when the engine is turned off and the heat rises to cause the vapors to be formed. Further vapor may be formed due to temperature changes.
- a fuel emission control system which will-'efi'ectively prevent excess pressures in the system; which will absorb the vapors emitted; which will return the vapors to the carburetor when the engine is operated; and which employs a novel valve.
- FIG. 1 is a partly diagrammatic view of a fuel emission control system embodying the invention.
- FIG. 2 is a sectional view through the valve embodied in the system shown in FIG. 1.
- the fuel emission control system comprises a sealed gas tank which supplies fuel through a line 11 to a fuel pump 12 and in turn to the carburetor 13.
- a line 14 extends from the gas tank overlying the fuel through a restrictor R, and thereafter is bifurcated into a first line 15 and a second line 16.
- Line 15 has an inflatable tank 17 connected thereto and extends to a valve 18.
- Line 16 also extends to the valve 18.
- a line 19 extends from the valve to an air cleaner 20 which has absorptive material 21 such as charcoal therein.
- a fourth line 22 extends from the valve 18 to a point downstream from the throttle 23 of the carburetor 13.
- a fifth line 24 having a restrictor R, therein is connected to a point upstream of the throttle valve 23.
- the valve 18 comprises a housing 25 consisting of two halves 26, an intermediate plastic ring 27 and a clamping ring 28.
- An intermediate perforated spring support wall 29 and a'flexible diaphragm 30 are interposed between the ring 27 and the housing half 26.
- a diaphragm 31 is interposed between the ring 27 and the turned over flange of clamping ring 28.
- the diaphragrns 30, 31 divide the housing into a first outer chamber 32, a second intermediate chamber 33 and an outer third chamber 34.
- Diaphragm 30 supports a pair of washers 35, 36 held thereon by a rivet 37 and supporting a resilient annular valve 38 that seats against an annular inwardly deformed portion 39 of the housing.
- Diaphragm 31 similarly supports washers 40, 41 by a rivet 42 to support an annular resilient valve 43 which seats against an annular seat 44.
- Springs 45, 46 are interposed between the wall 29 and their respective diaphragrns to yieldingly urge the diaphragrns outwardly and in turn the valves 38, 43 in the contact with their respective seats.
- First chamber 32 includes an outlet 47 that is connected to line 16 and an outlet 48 within seat 39 that is connected to line l9.1he ring 27 includes a radial outlet 49 that is connected to line 22.
- Chamber 34 includes an outlet 50 within seat 39 that is connected to line 15 and an outlet 51 that is connected to line 24.
- any vapors evaporated from the fuel in the gas tank will fill the inflatable tank 17. This will continue until a predetermined pressure is achieved at which time the pressure acting against the diaphragm 30 will open the valve 38 venting the vapors to the air cleaner 20. The vapors will become entrapped in the absorptive material 21 and therefore not pass through the atmosphere. When the pressure is dissipated below a predetermined value, the valve 30 will return to its original position.
- Restrictor R limits the degree of vacuum applied directly to tank 10 and restrictor R restricts the flow of vapors into the carburetor.
- a valve comprising a valve housing
- said wall having passages providing communication between the opposite sides thereof;
- said spring means comprising separate spring elements interposed between said wall and the respective diaphragrns;
- each of said outer chambers having a pair of openings therein;
- each said diaphragm having valve means thereon closing one of said openings in each chamber under the action of said spring means;
- said housing having another opening providing communication from the intermediate chamber to the exterior of the housing.
- said housing comprises a pair of housing members and an intermediate plastic ring having said last-mentioned opening therein, said housing members, intermediate wall, ring and diaphragm being clamped together to form a unitary valve structure.
- each said diaphragm includes spaced discs on opposite sides thereof;
- valve means each comprising a resilient member mounted on the outermost disc of each said diaphragm;
- said resilient member engaging the periphery of an opening of its respective chamber under the action of said spring means.
Abstract
A fuel emission control system comprising a gas tank and interconnecting lines with an inflatable tank and a pressure responsive valve which is operable to vent the excess pressure in the fuel tank and the inflatable tank to the atmosphere through emission absorptive material.
Description
United States Patent [72] Inventor Robert K. Smith [56] References Cited 1 N ga ggg UNITED STATES PATENTS [21] P 2,490,420 12/1949 Davis 251/61.2 [22] Filed Sept. 11, 1969 v 1 3,048,361 8/1962 Francis 251/6I.2
DlVlSlOll of Ser. No. 721,430, Apr. 15, 1968. [45] Patented "23; 1 -7-1 3,368,538 2/1968 Pauh et al. 123/136 [73] Assignee l3 & E Manufacturing Company Primary ExaminerI-Ienry T. Klinksiek flirt, Mich- Attorney-Barnes, Kisselle, Raisch & Choate [54] FUEL EMISSION CONTROL SYSTEM 3 Claims, 2 Drawing Figs.
[52] US. Cl 137/595, ABSTRACT: A fuel emission control system comprising a gas 251/612 tank and interconnecting lines 1th an inflatable tank and a [5 1] Int. Cl ..F02n1 59/00 pressure responsive valve which is operable to vent the excess [50] Field ofSearcb 251/6l.0- pressure in the fuel tank and the inflatable tank to the atmosphere through emission absorptive material.
70 6A8 TANK rq 4/e 6264/1/13? aaa2 2G re 46 AMI/i010 2a a y 4? 1446.00! Poe;- 4/
This invention relates to fuel emission control systems. One of the problems with automotive fuel systems is the evaporative emission of fuel to the atmosphere. This may 1 occur due to vapors from the fuel tank, which vapors may be emitted when the engine is excessively warm during operation or when the engine is turned off and the heat rises to cause the vapors to be formed. Further vapor may be formed due to temperature changes.
Among the objects of the invention are to provide a fuel emission control system which will-'efi'ectively prevent excess pressures in the system; which will absorb the vapors emitted; which will return the vapors to the carburetor when the engine is operated; and which employs a novel valve.
In the drawings:
FIG. 1 is a partly diagrammatic view of a fuel emission control system embodying the invention.
FIG. 2 is a sectional view through the valve embodied in the system shown in FIG. 1.
Referring to FIG. 1, the fuel emission control system comprises a sealed gas tank which supplies fuel through a line 11 to a fuel pump 12 and in turn to the carburetor 13. A line 14 extends from the gas tank overlying the fuel through a restrictor R, and thereafter is bifurcated into a first line 15 and a second line 16. Line 15 has an inflatable tank 17 connected thereto and extends to a valve 18. Line 16 also extends to the valve 18. A line 19 extends from the valve to an air cleaner 20 which has absorptive material 21 such as charcoal therein. A fourth line 22 extends from the valve 18 to a point downstream from the throttle 23 of the carburetor 13. A fifth line 24 having a restrictor R, therein is connected to a point upstream of the throttle valve 23.
As shown in FIG. 2, the valve 18 comprises a housing 25 consisting of two halves 26, an intermediate plastic ring 27 and a clamping ring 28. An intermediate perforated spring support wall 29 and a'flexible diaphragm 30 are interposed between the ring 27 and the housing half 26. A diaphragm 31 is interposed between the ring 27 and the turned over flange of clamping ring 28. p
The diaphragrns 30, 31 divide the housing into a first outer chamber 32, a second intermediate chamber 33 and an outer third chamber 34. Diaphragm 30 supports a pair of washers 35, 36 held thereon by a rivet 37 and supporting a resilient annular valve 38 that seats against an annular inwardly deformed portion 39 of the housing. Diaphragm 31 similarly supports washers 40, 41 by a rivet 42 to support an annular resilient valve 43 which seats against an annular seat 44. Springs 45, 46 are interposed between the wall 29 and their respective diaphragrns to yieldingly urge the diaphragrns outwardly and in turn the valves 38, 43 in the contact with their respective seats.
In operation, when the engine is running, manifold vacuum through line 22 enters chamber 33 and the chamber 34 through line 24. The action of the vacuum in the chamber 33 moves the diaphragrns 30, 31 inwardly against the action of the springs 45, 46 and thereby moves the valve members 38,
43 away from their respective valve seats.
The operation of the engine will draw any fuel vapors from the inflatable tank through line 15 and chamber 34 and line 22 into the carburetor. Any excess fuel vapors in the gas tank will also be withdrawn if a positive pressure exists in the gas tank. If there is no excess pressure in the line 15, air will flow through the air cleaner, lines 19, 16 and back through line 15 to the carburetor. In case a negative pressure exists in the gas tank, air will flow through the air cleaner and lines 19, 16 to the astank. y
en the engine is shut 0%, the manifold vacuum will decrease through line 22 and the diaphragrns will return under the action springs 45, 46 to bring their valve members against the valve seat sealing the fuel system.
When the engine is off, any vapors evaporated from the fuel in the gas tank will fill the inflatable tank 17. This will continue until a predetermined pressure is achieved at which time the pressure acting against the diaphragm 30 will open the valve 38 venting the vapors to the air cleaner 20. The vapors will become entrapped in the absorptive material 21 and therefore not pass through the atmosphere. When the pressure is dissipated below a predetermined value, the valve 30 will return to its original position.
When the engine is again started, the flow of air through the air cleaner will cause the condensed gas in the absorptive material 21 to pass through the carburetor.
Restrictor R limits the degree of vacuum applied directly to tank 10 and restrictor R restricts the flow of vapors into the carburetor.
I claim:
1. For use in a fuel emission control system or the like;
a valve comprising a valve housing;
a pair of fluid-responsive diaphragrns in said housing dividing said housing into an intermediate and two outer chambers;
spring means yieldingly urging said diaphragrns outwardly away from one another;
an intermediate wall between said diaphragrns;
said wall having passages providing communication between the opposite sides thereof;
said spring means comprising separate spring elements interposed between said wall and the respective diaphragrns;
each of said outer chambers having a pair of openings therein;
each said diaphragm having valve means thereon closing one of said openings in each chamber under the action of said spring means; and
said housing having another opening providing communication from the intermediate chamber to the exterior of the housing.
2. The combination set forth in claim 1 wherein said housing comprises a pair of housing members and an intermediate plastic ring having said last-mentioned opening therein, said housing members, intermediate wall, ring and diaphragm being clamped together to form a unitary valve structure.
3. The combination set forth in claim 1 wherein each said diaphragm includes spaced discs on opposite sides thereof;
said valve means each comprising a resilient member mounted on the outermost disc of each said diaphragm; and
said resilient member engaging the periphery of an opening of its respective chamber under the action of said spring means.
Claims (3)
1. For use in a fuel emission control system or the like; a valve comprising a valve housing; a pair of fluid-responsive diaphragms in said housing dividing said housing into an intermediate and two outer chambers; spring means yieldingly urging said diaphragms outwardly away from one another; an intermediate wall between said diaphragms; said wall having passages providing communication between the opposite sides thereof; said spring means comprising separate spring elements interposed between said wall and the respective diaphragms; each of said outer chambers having a pair of openings therein; each said diaphragm having valve means thereon closing one of said openings in each chamber under the action of said spring means; and said housing having another opening providing communication from the intermediate chamber to the exterior of the housing.
2. The combination set forth in claim 1 wherein said housing comprises a pair of housing members and an intermediate plastic ring having said last-mentioned opening therein, said housing members, intermediate wall, ring and diaphragm being clamped together to form a unitary valve structure.
3. The combination set forth in claim 1 wherein each said diaphragm includes spaced discs on opposite sides thereof; said valve means each comprising a resilient member mounted on the outermost disc of each said diaphragm; and said resilient member engaging the periphery of an opening of its respective chamber under the action of said spring means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87103269A | 1969-09-11 | 1969-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3565109A true US3565109A (en) | 1971-02-23 |
Family
ID=25356566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3565109D Expired - Lifetime US3565109A (en) | 1969-09-11 | 1969-09-11 | Fuel emission control system |
Country Status (1)
Country | Link |
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US (1) | US3565109A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732888A (en) * | 1972-03-10 | 1973-05-15 | Pronal Sa | Closing device for a pneumatic system |
US4228777A (en) * | 1979-02-01 | 1980-10-21 | The Bendix Corporation | Fuel control |
US4239181A (en) * | 1978-05-22 | 1980-12-16 | Robertshaw Controls Company | Valve positioner and method of making the same |
US4312319A (en) * | 1978-05-22 | 1982-01-26 | Robertshaw Controls Company | Valve positioner and method of making the same |
US6631705B1 (en) | 2000-07-10 | 2003-10-14 | Lycoming Engines | Modular fuel control apparatus |
US8794588B1 (en) | 2011-08-04 | 2014-08-05 | Metrex Valve Corp. | High pressure actuator regulating valve |
US11902124B2 (en) | 2015-06-05 | 2024-02-13 | Cisco Technology, Inc. | Round trip time (RTT) measurement based upon sequence number |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2490420A (en) * | 1948-02-10 | 1949-12-06 | Affillated Gas Equipment Inc | Gas control means |
US3048361A (en) * | 1960-10-14 | 1962-08-07 | Gen Motors Corp | Vacuum spring control apparatus |
US3368538A (en) * | 1964-11-06 | 1968-02-13 | Pierburg Kg A | Fuel pump for motor vehicles |
-
1969
- 1969-09-11 US US3565109D patent/US3565109A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2490420A (en) * | 1948-02-10 | 1949-12-06 | Affillated Gas Equipment Inc | Gas control means |
US3048361A (en) * | 1960-10-14 | 1962-08-07 | Gen Motors Corp | Vacuum spring control apparatus |
US3368538A (en) * | 1964-11-06 | 1968-02-13 | Pierburg Kg A | Fuel pump for motor vehicles |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732888A (en) * | 1972-03-10 | 1973-05-15 | Pronal Sa | Closing device for a pneumatic system |
US4239181A (en) * | 1978-05-22 | 1980-12-16 | Robertshaw Controls Company | Valve positioner and method of making the same |
US4312319A (en) * | 1978-05-22 | 1982-01-26 | Robertshaw Controls Company | Valve positioner and method of making the same |
US4228777A (en) * | 1979-02-01 | 1980-10-21 | The Bendix Corporation | Fuel control |
US6631705B1 (en) | 2000-07-10 | 2003-10-14 | Lycoming Engines | Modular fuel control apparatus |
US8794588B1 (en) | 2011-08-04 | 2014-08-05 | Metrex Valve Corp. | High pressure actuator regulating valve |
US11902124B2 (en) | 2015-06-05 | 2024-02-13 | Cisco Technology, Inc. | Round trip time (RTT) measurement based upon sequence number |
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