Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
  • F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
  • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
  • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
  • B60K15/03—Fuel tanks
  • B60K15/035—Fuel tanks characterised by venting means
  • B60K15/03519—Valve arrangements in the vent line
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
  • B60K15/03—Fuel tanks
  • B60K15/035—Fuel tanks characterised by venting means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
• • 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
  • Y10T137/0753—Control by change of position or inertia of system
  • Y10T137/0874—Vent opening or closing on tipping container
• • 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
  • Y10T137/2931—Diverse fluid containing pressure systems
  • Y10T137/3003—Fluid separating traps or vents
  • Y10T137/3084—Discriminating outlet for gas
  • Y10T137/309—Fluid sensing valve
  • Y10T137/3099—Float responsive
• • 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
  • Y10T137/7287—Liquid level responsive or maintaining systems
  • Y10T137/7358—By float controlled valve
  • Y10T137/7423—Rectilinearly traveling float
  • Y10T137/7426—Float co-axial with valve or port
  • Y10T137/7436—Float rigid with valve

Definitions

• the present disclosed subject matter relates to a fuel valve and more particularly it is concerned with a roll-over valve (ROV) combined with an over-pressure relief valve (OPR) and a pressure retention valve (PRV), at times referred to also as a holding pressure function - HPF.
• ROV roll-over valve
• OPR over-pressure relief valve
• PRV pressure retention valve
• US5738132 discloses a roll over vent valve comprising: a housing having a fluid inlet and a fluid outlet, the latter comprising a substantially elongated slitlike outlet aperture of the housing bounded by a valve seating. There is furthermore provided a float member located in the housing and axially displaceable within the housing between the inlet and the outlet; an elongated flexible closure membrane strip anchored at one end thereof to an end of the float member adjacent the outlet and at a portion thereof offset with respect to the outlet; spring biasing means located within the housing and bearing on the float member so as to spring bias it in the direction of the outlet; whereby the spring biasing together with buoyancy forces acting on the float member tend to press the membrane strip into sealing engagement with the outlet aperture whilst gravity forces acting on the float member tend to displace the float member away from the outlet so as to progressively detach the strip from sealing engagement with the outlet.
• US 8,109,285 is directed to a roll-over vent valve, comprising: a housing formed with a fluid inlet and a fluid outlet, a valve seating bounding an outlet aperture of the housing, a float member comprising a sealing member, the float member received within the housing and axially displaceable between a sealed position wherein the sealing member sealingly bears against the valve seating of the outlet aperture to seal the fluid outlet, and an open position wherein the sealing member is disengaged from the valve seating whereby the fluid outlet is in flow communication with the fluid inlet; a pressure -retention device extending intermediate the valve seating and the fluid outlet, to thereby shut fluid flow therebetween as long as pressure differential between the fluid inlet and the fluid outlet does not exceed a minimal pressure threshold; and a one-way fluid inlet valve being in flow communication with said fluid outlet to allow fluid flow towards the fluid inlet at a substantially high flow rate in the event of under-pressure at the fluid inlet, the one-way fluid inlet valve comprising a cage having an inlet port provided through
• ROV roll-over valve
• OPR over-pressure relief valve
• PRV pressure retention valve
• a fuel valve comprising a uniform valve housing accommodating a roll-over valve (ROV), an overpressure relief valve (OPR) and a pressure retention valve (PRV), wherein a pressure retention disc substantially axially displaceable within the top chamber between a normally closed potion in which it sealingly bears over an outlet port of the flow path and an open position; said pressure retention disc is configured with a cutout portion at least partially enveloping the pressure relief port.
• ROV roll-over valve
• OPRV overpressure relief valve
• PRV pressure retention valve
• a fuel valve comprising a uniform valve housing accommodating a roll-over valve (ROV), an over-pressure relief valve (OPR) and a pressure retention valve (PRV), wherein the housing is configured with a partition wall defining a fluid flow path extending between a bottom chamber configured with a valve inlet and a top chamber configured with a valve outlet; said bottom chamber accommodates a spring loaded float member axially displaceable between a closed position wherein a sealing head of the float member sealingly engages an inlet port of said flow path, and a normally open position wherein the sealing head is disengaged from said inlet port; a pressure relief port extending between the bottom chamber and a valve outlet and being normally sealed by a sealing plunger biased into sealing engagement within the top chamber; and a pressure retention disc substantially axially displaceable within the top chamber between a normally closed potion in which it sealingly bears over an outlet port of the flow path and an open position; said pressure retention disc is configured with a cutout portion at
• the fuel valve is configured for assembly at any location of a fuel tank, setting as a particular example a fuel delivery module of a fuel tank;
• the relief portion of the pressure retention disc has a crescent-like or U-like or kidney-like shape
• the outlet port of the flow path has an annular rim elevated from a top face of the partition wall, said annular rim configured for sealingly bearing the pressure retention disc when at the closed position;
• the partition wall is configured with at least one disc support upwardly extending from the top face, said at least one disc support extending slightly below the annular rim of the flow path.
• the at least one disc support provided to prevent clamping of the pressure retention disc within the top chamber.
• the at least one disc support can be configured as an annular or a segmented support, or as a plurality of projections;
• the pressure retention disc has a circle segment removed, substantially opposite the relief portion, to thereby facilitate fast pressure relief;
• a top cap of the valve is configured with at least one projection extending into the top chamber, restricting displacement of the pressure retention disc in the open position thereof. Said at least one projection extending from a bottom surface of the top cap;
• the shape, thickness and weight of the pressure retention disc define the retention pressure, i.e. the pressure at which the pressure retention disc will displace from its normally closed position to its open position, during filling a fuel tank (the higher a filling neck of a fuel tank extends, the pressure retention disc should be configured for retaining a higher pressure);
• the sealing plunger is spherical
• the biasing force applied to the sealing plunger defines a pressure threshold for displacing the over-pressure relief valve (OPR) into the open position;
• the valve outlet of the over-pressure relief valve (OPR) and an outlet of the top chamber are discrete.
• the center of gravity of the pressure retention disc coextends substantially above the fluid flow path.
• the float member is axially displaceable within the housing along a longitudinal axis offset from a longitudinal axis of the housing.
• a fuel tank assembly configured with a fuel valve of said specified type.
• Fig. 1 is top perspective view of a valve according to the presently disclosed subject matter:
• Fig. 2 is a longitudinal section taken along line II-II in Fig. 1 ;
• Fig. 3 is a top view of the valve of Fig. 1, with a top cap of the valve removed for visualizing the top chamber;
• Fig. 4 is a partially exploded top perspective view, with a top cap of the valve removed;
• FIG. 5 top perspective exploded view of the valve according to the presently disclosed subject matter
• Fig. 6A illustrates the valve according to the presently disclosed subject matter with the over-pressure relief valve displaced into its open position
• Fig. 6B illustrates the valve according to the presently disclosed subject matter with the pressure retention valve displaced into its open position
• Fig. 6C illustrates the valve according to the presently disclosed subject matter at an up-side down position with the roll-over valve displaced into its closed position.
• valve generally designated 10, in accordance with the present disclosed subject mater.
• the valve 10 comprises a cylindrical housing 12 extending along a longitudinal axis X and is fitted with a bottom cap 18 (Figs. 2 and 5) snap-fitted at a bottom end of the housing 12 by several lateral projections 20 snapingly engaged into openings 22 near the bottom edge of the housing 12.
• a top cap 30 is snap-fitted at a top of the housing and is engaged thereto by an annular rim 32 snapingly engaged under an annular shoulder 34 at a top edge of the housing 12.
• a fuel tank mounting crown 37 in the form of a metal disc configured with a plurality of spikes 38 for engagement, within an opening at a location of the fuel tank.
• the crown 38 is retained over the neck 36 by a downward extending retention ring 39 within the top cap 30.
• the housing 12 is further configured with several lateral projections 41 to facilitate coupling the valve 10 at different configurations within fuel tanks. It is appreciated that a valve according to the disclosed subject matter can be positioned at any location, though typically it is configured for application at a fuel delivery module of the fuel tank assembly, namely in neighboring a fuel pump, a fuel gauge and other fuel valves.
• the housing 10 is configured with a partition wall 40 defining a bottom chamber 44 and a top chamber 46 with a fluid flow path 48 extending through the partition wall 40 and having an inlet port 50 at the bottom chamber 44, and an outlet port 54 at the top chamber 46.
• both the inlet port 50 and the outlet port 54 are circular and project from the bottom wall face 58 and top wall face 60 of the partition wall 40, respectively.
• the bottom chamber 44 is configured with a plurality of openings 70 at the housing 10, serving as valve fluid inlets to thereby facilitate fluid flow between the fuel tank (not shown) and the bottom chamber 44 of the valve 10.
• the top cap 30 is configured with a valve outlet port 76 extending from the top chamber 46.
• An over-pressure relief fluid outlet port 78 extends from the top cap 30, to be discussed hereinafter. When assembled within a fuel tank, said valve outlet port 76 and said overpressure relief outlet port 78 extend through suitable piping (not shown) to a fuel vapor recovery system.
• a float member 80 serving as a roll-over valve (ROV) and configured at a top end thereof with a cone-shaped sealing projection 82 shaped and sized for sealing engagement of the annular inlet port 50.
• a coiled spring 84 bears at its bottom end on the bottom cap 18 and is partially supported within the float member 80 and has its top end bearing against the float member 80, applying thereto a moderate biasing force.
• the arrangement is such that the float member 80 is axially displaceable within the housing 12 along a longitudinal axis X' parallel to longitudinal axis X of the housing, however offset (non-coaxial) with one another (Figs. 2 and 3).
• the float member may be free to rotate about its longitudinal axis X'.
• Fluid flow path 48 extends coaxial with axis X'.
• an over-pressure relief valve generally designated 90 and comprising a cylindrical fluid port 92 having a bottom pressure port 94 within the bottom chamber 44 and a pressure relief port 96 not extending through the top chamber 46, said pressure relief port 96 coextending with the over-pressure relief fluid outlet port 78 at the top cap 30.
• OCR over-pressure relief valve
• the cylindrical fluid port 92 of the over-pressure relief valve (OPR) 90 extends parallel to the fluid flow path 48 extending through the partition wall 40 and are both parallel to the longitudinal axis X, there being a wall portion 110 within the top chamber (best seen in fig. 4), partitioning the cylindrical fluid port 92 of the over-pressure relief valve (OPR) 90 from the top chamber 46, such that said paths are discrete.
• the valve 10 is further configured with a pressure retention valve (PRV), generally designated 130 wherein a pressure retention disc 132 is received within the top chamber 46 and substantially axially displaceable between a normally closed potion (Figs. 2 and 6A) in which a bottom face 134 thereof sealingly bears over the outlet port 54 of the flow path, and an open position in which the pressure retention disc 132 is displaced from the outlet port 54 and facilitates fluid flow therethrough.
• PRV pressure retention valve
• PRV pressure retention valve
• a pressure retention disc 132 is received within the top chamber 46 and substantially axially displaceable between a normally closed potion (Figs. 2 and 6A) in which a bottom face 134 thereof sealingly bears over the outlet port 54 of the flow path, and an open position in which the pressure retention disc 132 is displaced from the outlet port 54 and facilitates fluid flow therethrough.
• the pressure retention disc is configured with a cutout portion 136 at least partially enveloping the wall portion 110 of the pressure relief port of the over-pressure relief valve
• This configuration facilitates the compact structure of the valve comprising in one housing the three functions, namely a roll-over valve (ROV) combined with an over-pressure relief valve (OPR) and a pressure retention valve (PRV; at times referred to also as a holding pressure function - HPF).
• ROV roll-over valve
• OPR over-pressure relief valve
• PRV pressure retention valve
• the arrangement is such that the center of gravity of the pressure retention disc 132 is calculated to extend through longitudinal axis X', i.e. extending offset the longitudinal axis X and substantially above the fluid flow path 48.
• outlet port 54 of the flow path 48 has an annular rim 139 elevated from a top face 60 of the partition wall 40, said annular rim 139 configured for sealingly bearing the bottom surface 134 of the pressure retention disc 132 when at the closed position (Figs. 2 and 6A).
• the partition wall 40 is configured with a plurality of disc support bulges 144 upwardly projecting from the top face 60, said disc supports extending slightly below the annular rim 139 of the flow path 48, said disc supports provided to prevent clamping of the pressure retention disc within the top chamber 46.
• the at least one disc support can be configured as an annular or a segmented support, or as a plurality of projections as illustrated in the present example.
• the pressure retention disc has a circle segment 148 removed (best seen in Figs. 3 and 4), substantially opposite the cutout portion 136, to thereby facilitate fast pressure relief and smooth displacement of the disc within the top chamber, i.e. to prevent its clamping against inside side walls 150 of the top chamber 46.
• all radius of the pressure retention disc 132 are chamfered, i.e. smoothened.
• the shape, thickness and weight of the pressure retention disc 132 define the retention pressure, i.e. the pressure at which the pressure retention disc 132 will displace from its normally closed position (Fig. 6A) to its open position (Fig. 6B), during filling a fuel tank (the higher a filling neck of a fuel tank extends, the pressure retention disc should be configured for retaining a higher pressure).
• top cap 30 is configured with at least one projection 154 extending into the top chamber 46, restricting displacement of the pressure retention disc 132 in the open position thereof (Fig. 64) and preventing blocking of the valve outlet port 76.
• FIGs. 2 and 6A to 6C different operating positions of the valve 10 when mounted in a vehicle's fuel tank (not shown) are illustrated.
• Fig. 6A illustrates a position at which pressure builds up at the fuel tank (not shown), resulting in displacement of the over-pressure relief valve (OPR) 90 into its open position.
• OPR over-pressure relief valve
• the roll-over valve (ROV) remains at its normally open position and it is not unlikely that at this position the pressure retention valve (PRV) 130 will also displace into its open position.
• Fig. 6B the roll-over valve (ROV) remains at its normally open position and the over-pressure relief valve (OPR) 90 is at its normally closed position, however the pressure retention valve (PRV) 130 is displaced into its open position facilitating moderate pressure relief e.g. at the event of fueling the vehicle.
• Fig. 6C the valve 10 is illustrated at an up-side down position, simulating rollover of the vehicle, wherein the roll-over valve (ROV) displaces into its closed position to prevent fuel escape from the fuel tank. At this position the over-pressure relief valve (OPR) 90 remains at its normally closed position.
• the pressure retention valve (PRV) 130 is displaced into its open position, however owing to the closed rollover valve (ROV) there is no fuel escape therethrough.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Safety Valves (AREA)
• Self-Closing Valves And Venting Or Aerating Valves (AREA)

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Applications Claiming Priority (2)

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• 2012
  • 2012-03-13 KR KR1020137022223A patent/KR101928855B1/ko active Active
  • 2012-03-13 US US13/985,304 patent/US9434246B2/en active Active
  • 2012-03-13 WO PCT/IL2012/050085 patent/WO2012123941A1/en not_active Ceased
  • 2012-03-13 CN CN201280013121.9A patent/CN103459906B/zh active Active
  • 2012-03-13 RU RU2013143238/06A patent/RU2593328C2/ru active
  • 2012-03-13 BR BR112013023008-8A patent/BR112013023008B1/pt not_active IP Right Cessation
  • 2012-03-13 JP JP2013558571A patent/JP5989012B2/ja active Active
  • 2012-03-13 EP EP12716655.1A patent/EP2686591B1/en active Active

Patent Citations (5)

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