CA2271328C - Fuel refilling assembly - Google Patents
Fuel refilling assembly Download PDFInfo
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- CA2271328C CA2271328C CA 2271328 CA2271328A CA2271328C CA 2271328 C CA2271328 C CA 2271328C CA 2271328 CA2271328 CA 2271328 CA 2271328 A CA2271328 A CA 2271328A CA 2271328 C CA2271328 C CA 2271328C
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- filler neck
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Abstract
A fuel refilling assembly for receiving a filling nozzle to open and close a filler neck of a fuel tank. The refilling assembly has a housing attached to the filler neck to receive the filling nozzle. A pressure valve and a vacuum valve are mounted to the housing. The valves move between seated and unseated positions to automatically equalize the pressure within the filler neck, a filler pipe and the fuel tank. The refilling assembly is characterized by a first flap pivotally mounted to the housing and engaging the vacuum valve for automatically moving the vacuum valve from the seated position to the unseated position. The first flap is pivoted when the filling nozzle is partially inserted within the filler neck. Once the vacuum valve is disengaged, any pressurized fuel vapors within the filler neck, filler pipe and fuel tank are vented to the atmosphere. The venting occurs before the filling nozzle opens the filler neck which ensures a safe filling operation.
Description
FUEL REFILLING ASSEMBLY
RELATED APPLICATION
This patent application claims priority to and all the benefits of United States Provisional Patent Application Serial No. 60/084,670, filed on May 7, 1998 and entitled "Fuel Filler Inlet".
TECHNICAL FIELD
The subject invention relates to a fuel refilling assembly for filling a fuel tank of an automotive vehicle.
BACKGROUND OF THE INVENTION
Vehicle fuel tanks generally include a filler neck extending from the tank to allow a user to refill the tank with liquid fuel. Some type of cap or cover is placed over the filler neck in order to seal the fuel tank from the atmosphere.
Conventional gas cap assemblies are typically threaded onto the filler neck and include some type of locking handle. The typical function of a gas cap is to seal the fuel tank from outside impurities, such as dirt and dust, and to also maintain fuel vapor within the fuel tank. A predetermined pressure is usually maintained by a valve mechanism located within the cap. When the pressure within the fuel tank reaches a predetermined super-atmospheric level, the valve mechanism automatically opens to release the pressure. When the pressure within the fuel tank 1 Docket No.: 65,158-009 r drops to a predetermined sub-atmospheric level, the valve mechanism opens to equalize the pressure.
Before the filling of the fuel tank a user completely removes the gas cap from the filler neck and then inserts a filling nozzle. The fuel tank is then filled to the desired level. As appreciated, pressure may build-up within the fuel tank but still be below the super-atmospheric level.
Many prior art refueling systems include a sealing flap door mounted within the filler neck. The filling nozzle opens the flap door when inserted into the filler neck. When the flap door is closed, the flap door seals the filler neck from the atmosphere and contains the built-up pressure within the fuel tank. Just before insertion of the filling nozzle, some fuel may drip or spill from the filling nozzle onto the flap door. This creates a potentially dangerous situation.
Specifically, when the filling nozzle opens the flap door, the seal between the flap door and filler neck is broken which releases the built-up pressure in the fuel tank. This escaping vapor can spray the spilled fuel toward the user. Certain injury can result such as affixation, burning and scorching.
Accordingly, it is desirable to have a fuel refilling assembly which incorporates a fast pressure decay within the fuel filler neck and fuel tank prior to completely inserting the filling nozzle. Even more preferably, this pressure decay 2 Docket No.: 65.158-009 should automatically be triggered when the filling process is initiated by the user.
In addition, the fuel refilling assembly should incorporate a valve mechanism for automatically equalizing the pressure within the fuel tank.
SUMMARY OF THE INVENTION
A fuel refilling assembly for selectively receiving a filling nozzle to open and close a filler neck of a fuel tank. The refilling assembly comprises a housing adapted for attachment to the filler neck to selectively receive the filling nozzle. At least one sealing device is movably mounted to the housing and moveable between seated and unseated positions for selectively equalizing pressure within the filler neck. The refilling assembly is characterized by an actuator movably mounted to the housing and selectively engaging the sealing device for automatically lifting the sealing device from the seated position to the unseated position when the filling nozzle is partially received within the filler neck, thereby venting any pressurized fluid from the filler neck before the filling nozzle opens the filler neck.
Accordingly, the subj ect invention provides a fuel refilling assembly having a valve mechanism for automatically equalizing the pressure within the fuel tank and incorporates a fast pressure decay within the fuel filler neck and fuel tank prior to completely inserting the filling nozzle. The pressure decay is automatically triggered when the filling nozzle engages the actuator.
Docket No.: 65,158-009 BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
Figure 1 is a side view of a vehicle fuel tank incorporating a fuel refilling assembly ofthe subject invention;
Figure 2 is a partially cross-sectional side view of the fuel refilling assembly;
Figure 3 is a top view taken along line 3-3 of Figure 2;
Figure 4 is a top view taken along line 4-4 of Figure 2;
Figure 5 is a partially cross-sectional side view of a lower housing portion with first and second flaps;
Figure 6 is a partially cross-sectional side view of the lower housing portion with only the second flap;
Figure 7 is a side view of an alternative embodiment of the fuel refilling assembly in a completely closed condition;
Figure 8 is a side view of the alternative embodiment of Figure 7 in a partially open condition;
Figure 9 is a side view of the alternative embodiment of Figure 7 in Docket No.: 65,158-009 a fully open condition;
Figure 10 is a cross-sectional side view of an alternative embodiment of a housing;
Figure 11 is a top view taken along line 11-11 of Figure 7;
Figure 12 is a detailed view of a vacuum opening of the alternative embodiment of Figure 7; and Figure 13 is a detailed view of a pressure opening of the alternative embodiment of Figure 7.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the Figures, wherein like numerals indicate like or corresponding parts throughout the several views, a fuel refilling assembly is generally shown at 20 in Figures 1 and 2. The refilling assembly 20 selectively receives a filling nozzle 22 to open and close a filler neck 24 of a fuel tank 26. The filler neck 24 is actually an extension of a filler pipe 25 which extends directly from the fuel tank 26. For illustrative purposes, the filling nozzle 22 is only shown in the alternative embodiments of Figures 8 and 9. The fuel tank 26, filler pipe 25 and filler neck 24 axe shown schematically and may be of any conventional type as is known in the art.
The refilling assembly 20 comprises a housing for attachment to the filler neck 24 to selectively receive the filling nozzle 22. The housing includes an Docket No.: 65,158-009 upper housing portion 28 and a lower housing portion 30. The upper housing portion 28 is mounted within the filler neck 24 by any suitable means such as crimping, locking forgers and/or a separable fastener. The lower housing portion 30 is in turn snap fit into the upper housing portion 28 by an annular rib (not numbered). A pair of truncated cones 32 are also press fit into the upper housing portion 28. The truncated cones 32, upper housing portion 28 and lower housing portion 30 provide a guide for receiving and guiding the filling nozzle 22 into the filler neck 24.
The upper housing portion 28 also extends around a top lip of the filler neck 24. A cap 34 is removably mounted to the top of the upper housing portion 28 for providing a protective cover for the filler neck 24 and fuel tank 26.
The cap 34 is preferably of a simple design which does not seal against the upper housing portion 28 but keeps dust, dirt and other impurities from entering the filler neck 24 and fuel tank 26. The cap 34 has a cam lock (not shown) or is otherwise attached to the upper housing portion 28. As appreciated, the cap 34, housing portions 28, 30, may be of any suitable design or configuration without deviating from the scope of the subject invention.
At least one sealing device is mounted to the housing portions 28, 30 and is moveable between seated and unseated positions for selectively equalizing any pressure within the filler neck 24. Specifically, the sealing device includes a 6 Docket No.: 65,158-009 vacuum valve 36 for allowing atmospheric air to pass into the fuel tank 26 when the fuel tank 26 is in a vacuum condition. The sealing device also includes a pressure valve 38 for venting the fuel tank 26 when the fuel tank 26 is in a pressure condition.
As discussed in the background section, during normal operating conditions, a predetermined pressure is to be maintained within the fuel tank 26 by the sealing devices 36, 38. When the pressure within the fuel tank 26 reaches a predetermined super-atmospheric level, i.e., a pressure condition, the pressure valve 38 automatically opens to release the pressure. Preferably, the predetermined super-atmospheric level is between 15 and 17 kilo Pascal (kPa). In other words, when the pressure within the fuel tank 26 reaches lSkPa the pressure valve 38 will begin to open. When the pressure reaches l7kPa the pressure valve 38 will be opened entirely. When the pressure within the fuel tank 26 drops to a predetermined sub-atmospheric level, i.e., a vacuum condition, the vacuum valve 36 opens to similarly equalize the pressure.
A vent passageway 40 extends around the housing 28, 30 for providing fluid communicationbetween the sealing devices 36, 38 and the fuel tank 26. The housing 28, 30 also includes a chamber 42 disposed between the vacuum 36 and pressure 38 valves and in fluid communicationwith the vent passageway for providing fluid communicationbetweenthe fuel tank 26 and the vacuum 36 and pressure 3 8 valves. Accordingly, the pressure within the fuel tank 26 and filler neck 24 are directly experienced by the vacuum 36 and pressure 38 valves.
7 Docket No.: 65,158-009 The refilling assembly 20 is characterized by an actuator 44 pivotally mounted to the housing 28, 30 and selectively engaging the sealing device 36 for automatically lifting the sealing device 36 from the seated position to the unseated position when the filling nozzle 22 is partially received within the filler neck 24, thereby venting any pressurized fluid from the filler neck 24 before the filling nozzle 22 opens the filler neck 24. The actuator 44 therefore lifts the sealing device 36, optionally either the pressure 38 or vacuum 36 valve, regardless of the pressure within the fuel tank 26 to ensure a complete release of pressure. The release of pressure is preferably vented out to the atmosphere. This complete release of pressure is a safety measure which combats the deficiencies associated with the prior art designs discussed in the background section. As appreciated, the fuel tank may be pressurizedto almost 1 SkPa and the pressure valve 38 will not automatically release this pressure. This built-up pressure within the fuel tank 26 necessitates the need for the subject invention.
Referring also to Figures 4 and 5, the actuator 44 includes a cam 46 selectively engaging one of the sealing devices 36, 38 for lifting the sealing device 36, 3 8 to the unseated position when the filling nozzle 22 is partially received within the filler neck 24.
As appreciated, once the filling nozzle 22 opens the filler neck 24 the refilling of the fuel may commence. A liquid seal between the filling nozzle 22 and Docket No.: 65,158-009 the filler pipe 25 is created during the refueling. A mechanical seal (not shown) may also be used between the filling nozzle 22 and filler pipe 25 to create this seal. The liquid seal prevents any displaced fuel vapors from venting into the atmosphere.
Preferably, the fuel vapors will vent through an environmentally safe container such as a carbon canister (not shown).
The cam 46 is preferably an integral part of the actuator 44. The sealing device 36, 38 includes a post 48 selectively engaging the cam 46 of the actuator 44 for effecting movement of the sealing device 36, 38.
The actuator 44 is preferably a first flap 44 pivotally connected to the housing 28, 30 for selective engagementwith the filling nozzle 22. The first flap 44 extends partially into the lower housing portion 30. A second flap 50 is also pivotally connected to the housing 28, 30 and disposed below the first flap 44. In other words, the second flap 50 is positioned to engage the filling nozzle 22 after the filling nozzle 22 engages the first flap 44. A flap gasket 52 is mounted to a distal end of the housing 28, 30 and is engaged by the second flap 50 for sealing a portion of the housing 28, 30 from the filler neck 24 of the fuel tank 26.
Specifically, the second flap 50 seals the lower housing portion 30. As shown in Figures 4 and 6, a pair of springs 54 are mounted between the housing 28, 30 and the second flap for continuously biasing the second flap 50 against the flap gasket 52.
Preferably, the first flap 44 pivots in a clockwise direction and the second flap 50 pivots in a Docket No.: 6S,1S8-009 counter-clockwisedirection. The second flap 50 primarily seals the housing 28, from the filler pipe 25 and prevents any fuel vapor from escaping out the filler neck 24.
During insertion of the filling nozzle 22, the filling nozzle 22 first engages and pivots the first flap 44. This releases any built up pressure in the filler neck 24, filler pipe 25 and fuel tank 26. The filling nozzle 22 then hits the second flap 50 which urges the second flap 50 out of engagement with the flap gasket 52.
Since the pressure is released, there is no danger of splashing fuel and/or fuel vapors injuring the user. The filling nozzle 22 can now be completely inserted within the housing 28, 30 and the refilling of the fuel tank can begin.
In the preferred embodiment of Figures 2 through 6, the actuator 44, or first flap, engages the vacuum valve 36 when the actuator 44 is pivoted by the filling nozzle 22. The vacuum valve 36 includes a vacuum gasket 56 mounted to the housing 28, 30 and a sealing portion 58 extending from the post 48 for selective engagement with the vacuum gasket 56 to seal the filler neck 24. The vacuum gasket 56 preferably has an annular configuration with a pair of apertures (not numbered). One aperture provides an opening for the post 48 and the other aperture extends over a tab 60 which secures the vacuum gasket 5f to the lower housing portion 30. The sealing portion 58 and post 48 have a substantially T-shaped configuration when viewed in cross-section.
1 ~ Docket No.: 65,15&009 The actuator 44 selectively engages the post 48 to lift the sealing portion 58 from engagement with the vacuum gasket 56 to a position above the vacuum gasket 56 for venting the filler neck 24, filler pipe 25 and fuel tank 26 before the filling nozzle 22 opens the filler neck 24. The ventilating of the filler neck 24 is specifically achieved by opening a fluid passageway between the chamber 42 and the atmosphere via the unsealing of the vacuum gasket 56.
As also shown in Figure 3, the vacuum valve 36 includes a pair of vacuum springs 62 engaging the sealing portion 58 for continuously biasing the sealing portion 58 toward the engagement with the vacuum gasket 56.
Preferably, the sealing portion 58 has a curved configuration substantially in the shape of a banana. As appreciated, the vacuum valve 36 may have any suitable configuration so long as the filler neck 24, filler pipe 25 and fuel tank 26 may be automatically ventilated before the filling nozzle 22 is completely inserted within the housing 28, 30. One such variation of the vacuum valve 36 is disclosed in the alternative embodiment which is discussed in greater detail hereinbelow.
As illustrated in Figure 2, the housing 28, 30 includes an upwardly proj ecting pressure opening 64 for seating the pressure valve 3 8 and sealing the filler neck 24. Specifically, the pressure opening 64 extends from the upper housing portion 28. The pressure opening 64 is in fluid communicationwith the chamber such that the pressure valve 38 is in direct contact with the pressure exerted from the 1 1 Docket No.: 65,158-009 filler pipe 25.
The pressure valve 38 includes a pressure gasket 66 mounted to a pressure plate 68. The pressure valve 38 also includes an annular pressure spring 70 engaging the pressure plate 68 for continuously biasing the pressure gasket 66 against the pressure opening 64 of the housing 28, 30. As discussed above, the desired pressure which begins to lift the pressure valve 38 is lSkPa, i.e., super-atmospheric pressure. Accordingly, the annular pressure spring 70 must have a biasing force which equates to holding the pressure gasket 66 against the pressure opening 64 up to the lSkPa. Once the pressure within the filler neck 24 achieves 1 SkPa, the pressure plate 68 and gasket 66 will lift upward against the biasing force of the pressure spring 70 to open a fluid passageway between the chamber 42 and the atmosphere. Specifically, there are a number of openings 72 within one of the truncated cones 32 to vent the super-atmospheric pressure. As appreciated, the openings 72 may be holes formed within the cone 32 or gaps formed between the cones 32 and the lower housing portion 30.
Referring now to Figures 7 through 13, wherein like numerals increased by 100 indicate like or corresponding parts throughout the several views, an alternative embodiment of the fuel refilling assembly is shown. The fuel refilling assembly is generally shown at 120 in Figures 7, 8 and 9. As in the preferred embodiment, the refilling assembly 120 includes a housing having upper 128 and 12 Docket No.: 65,158-009 lower 130 housing portions mounted within a filler neck 124 of a fuel tank (not specifically shown in these figures). The actuator 144 is a first flap 144 and operates in substantially the same manner as above. However, the first flap 144 in this embodiment has a different shaped cam 146 and extends entirely across the lower housing portion 130. There is also a second flap 150 with a flap gasket 152 operating in substantially the same manner. Although the second flap 150 pivots clockwise and has a different spring arrangement. This alternative embodiment also has a similar vent passageway 140 and chamber 142 for creating a fluid passageway between the filler pipe 125 and the sealing devices. As above, the sealing devices include a pressure valve 138 and a vacuum valve 136. The sealing devices 136, also include a post 148 selectively engaging the cam 146 of the actuator 144 for moving one of the sealing devices 136, 138 to an unseated position. The primary difference between the preferred embodiment and this alternative embodiment is in the configuration and operation of the pressure 138 and vacuum 136 valves.
As illustrated in Figure 7, the fuel refilling assembly 120 is in a completely closed condition. Figure 8 shows the refilling assembly 120 in a partially open condition and Figure 9 shows the refilling assembly 120 in a fully open condition. To move the refilling assembly 120 to the partially open condition, the filling nozzle 22 is partially inserted into the housing 128, 130 and the actuator 144 engages the pressure valve 138. Specifically, the first flap 144 pivots which engages the cam 146 with the post 148 to lift the pressure valve 138.
13 Docket No.: 65,158-009 As also shown in Figures 10, 11 and 13, the housing 128, 130 includes an upwardly proj ecting pressure opening 164 for seating the pressure valve 138 and sealing the filler neck 124 and filler pipe 125. As discussed above, the post 148 selectively engages the pressure valve 13 8 to lift the pressure valve 13 8 from the seated position to a position above the pressure opening 164 for venting the filler neck 124, filler pipe 125 and fuel tank before the filling nozzle 22 opens the filler neck 124. The pressure valve 138 includes a pressure gasket 166 mounted to a pressure plate 168. The pressure valve 138 also includes an annular pressure spring 170 engaging the pressure plate 168 for continuously biasing the pressure gasket 166 against the pressure opening 164 of the housing 128, 130. The components of the pressure valve 138, i.e., the pressure gasket 166, pressure plate 168, and pressure spring 170, are substantiallythe same as those disclosed in the primary embodiment.
During normal operating conditions, the pressure valve 138 of this alternative embodiment operates in a similar fashion as the pressure valve 38 of the preferred embodiment. In other words, when the pressure within the fuel tank reaches a predetermined super-atmospheric level, the pressure valve 138 automatically opens to release the pressure. The predetermined super-atmospheric level is between lSkPa and l7kPa. The pressure valve 138, however, also releases all the pressure within the filler neck 124 and filler pipe 125 as the filling nozzle 22 is partially inserted into the housing 128, 130. As discussed in the preferred embodiment, with reference to the vacuum valve 36, this pressure valve 138 vents 14 Docket No.: 65,158-009 the filler neck 124 and filler pipe 125 by opening a fluid passageway between the chamber 142 and the atmosphere via the unsealing of the pressure gasket 166.
As also shown in Figures 10, 1 l and 12, the housing 128, 130 also includes a downwardly projecting vacuum opening 174 for seating the vacuum valve 136 and sealing the filler neck 124. The vacuum valve 136 includes a vacuum gasket 176 mounted to a vacuum plate 178. The vacuum valve 136 also includes an annular vacuum spring 180 engaging the vacuum plate 178 for continuously biasing the vacuum gasket 176 against the vacuum opening 174 of the housing 128, 130.
The vacuum valve 136 operates in a similar fashion as above such that when the pressure within the fuel tank drops to a predetermined sub-atmospheric level, the vacuum valve 136 opens to equalize the pressure. Specifically, the vacuum valve 136 opens to create a fluid passageway between the chamber 142 and the atmosphere.
As best shown in Figures 10 and 11, there are a number of pressure openings 164 and vacuum openings 174 disposed circumferentiallywithin the upper housing portion 128. Preferably, there are four pressure openings 164 and four vacuum openings 174 disposed in an alternating fashion. In addition, a notch is provided to guide the upward and downward movement of the pressure 164 and vacuum 174 seals.
15 Docket No.: 65,158-009 Many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.
16 Docket No.: 65,158-009
RELATED APPLICATION
This patent application claims priority to and all the benefits of United States Provisional Patent Application Serial No. 60/084,670, filed on May 7, 1998 and entitled "Fuel Filler Inlet".
TECHNICAL FIELD
The subject invention relates to a fuel refilling assembly for filling a fuel tank of an automotive vehicle.
BACKGROUND OF THE INVENTION
Vehicle fuel tanks generally include a filler neck extending from the tank to allow a user to refill the tank with liquid fuel. Some type of cap or cover is placed over the filler neck in order to seal the fuel tank from the atmosphere.
Conventional gas cap assemblies are typically threaded onto the filler neck and include some type of locking handle. The typical function of a gas cap is to seal the fuel tank from outside impurities, such as dirt and dust, and to also maintain fuel vapor within the fuel tank. A predetermined pressure is usually maintained by a valve mechanism located within the cap. When the pressure within the fuel tank reaches a predetermined super-atmospheric level, the valve mechanism automatically opens to release the pressure. When the pressure within the fuel tank 1 Docket No.: 65,158-009 r drops to a predetermined sub-atmospheric level, the valve mechanism opens to equalize the pressure.
Before the filling of the fuel tank a user completely removes the gas cap from the filler neck and then inserts a filling nozzle. The fuel tank is then filled to the desired level. As appreciated, pressure may build-up within the fuel tank but still be below the super-atmospheric level.
Many prior art refueling systems include a sealing flap door mounted within the filler neck. The filling nozzle opens the flap door when inserted into the filler neck. When the flap door is closed, the flap door seals the filler neck from the atmosphere and contains the built-up pressure within the fuel tank. Just before insertion of the filling nozzle, some fuel may drip or spill from the filling nozzle onto the flap door. This creates a potentially dangerous situation.
Specifically, when the filling nozzle opens the flap door, the seal between the flap door and filler neck is broken which releases the built-up pressure in the fuel tank. This escaping vapor can spray the spilled fuel toward the user. Certain injury can result such as affixation, burning and scorching.
Accordingly, it is desirable to have a fuel refilling assembly which incorporates a fast pressure decay within the fuel filler neck and fuel tank prior to completely inserting the filling nozzle. Even more preferably, this pressure decay 2 Docket No.: 65.158-009 should automatically be triggered when the filling process is initiated by the user.
In addition, the fuel refilling assembly should incorporate a valve mechanism for automatically equalizing the pressure within the fuel tank.
SUMMARY OF THE INVENTION
A fuel refilling assembly for selectively receiving a filling nozzle to open and close a filler neck of a fuel tank. The refilling assembly comprises a housing adapted for attachment to the filler neck to selectively receive the filling nozzle. At least one sealing device is movably mounted to the housing and moveable between seated and unseated positions for selectively equalizing pressure within the filler neck. The refilling assembly is characterized by an actuator movably mounted to the housing and selectively engaging the sealing device for automatically lifting the sealing device from the seated position to the unseated position when the filling nozzle is partially received within the filler neck, thereby venting any pressurized fluid from the filler neck before the filling nozzle opens the filler neck.
Accordingly, the subj ect invention provides a fuel refilling assembly having a valve mechanism for automatically equalizing the pressure within the fuel tank and incorporates a fast pressure decay within the fuel filler neck and fuel tank prior to completely inserting the filling nozzle. The pressure decay is automatically triggered when the filling nozzle engages the actuator.
Docket No.: 65,158-009 BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
Figure 1 is a side view of a vehicle fuel tank incorporating a fuel refilling assembly ofthe subject invention;
Figure 2 is a partially cross-sectional side view of the fuel refilling assembly;
Figure 3 is a top view taken along line 3-3 of Figure 2;
Figure 4 is a top view taken along line 4-4 of Figure 2;
Figure 5 is a partially cross-sectional side view of a lower housing portion with first and second flaps;
Figure 6 is a partially cross-sectional side view of the lower housing portion with only the second flap;
Figure 7 is a side view of an alternative embodiment of the fuel refilling assembly in a completely closed condition;
Figure 8 is a side view of the alternative embodiment of Figure 7 in a partially open condition;
Figure 9 is a side view of the alternative embodiment of Figure 7 in Docket No.: 65,158-009 a fully open condition;
Figure 10 is a cross-sectional side view of an alternative embodiment of a housing;
Figure 11 is a top view taken along line 11-11 of Figure 7;
Figure 12 is a detailed view of a vacuum opening of the alternative embodiment of Figure 7; and Figure 13 is a detailed view of a pressure opening of the alternative embodiment of Figure 7.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the Figures, wherein like numerals indicate like or corresponding parts throughout the several views, a fuel refilling assembly is generally shown at 20 in Figures 1 and 2. The refilling assembly 20 selectively receives a filling nozzle 22 to open and close a filler neck 24 of a fuel tank 26. The filler neck 24 is actually an extension of a filler pipe 25 which extends directly from the fuel tank 26. For illustrative purposes, the filling nozzle 22 is only shown in the alternative embodiments of Figures 8 and 9. The fuel tank 26, filler pipe 25 and filler neck 24 axe shown schematically and may be of any conventional type as is known in the art.
The refilling assembly 20 comprises a housing for attachment to the filler neck 24 to selectively receive the filling nozzle 22. The housing includes an Docket No.: 65,158-009 upper housing portion 28 and a lower housing portion 30. The upper housing portion 28 is mounted within the filler neck 24 by any suitable means such as crimping, locking forgers and/or a separable fastener. The lower housing portion 30 is in turn snap fit into the upper housing portion 28 by an annular rib (not numbered). A pair of truncated cones 32 are also press fit into the upper housing portion 28. The truncated cones 32, upper housing portion 28 and lower housing portion 30 provide a guide for receiving and guiding the filling nozzle 22 into the filler neck 24.
The upper housing portion 28 also extends around a top lip of the filler neck 24. A cap 34 is removably mounted to the top of the upper housing portion 28 for providing a protective cover for the filler neck 24 and fuel tank 26.
The cap 34 is preferably of a simple design which does not seal against the upper housing portion 28 but keeps dust, dirt and other impurities from entering the filler neck 24 and fuel tank 26. The cap 34 has a cam lock (not shown) or is otherwise attached to the upper housing portion 28. As appreciated, the cap 34, housing portions 28, 30, may be of any suitable design or configuration without deviating from the scope of the subject invention.
At least one sealing device is mounted to the housing portions 28, 30 and is moveable between seated and unseated positions for selectively equalizing any pressure within the filler neck 24. Specifically, the sealing device includes a 6 Docket No.: 65,158-009 vacuum valve 36 for allowing atmospheric air to pass into the fuel tank 26 when the fuel tank 26 is in a vacuum condition. The sealing device also includes a pressure valve 38 for venting the fuel tank 26 when the fuel tank 26 is in a pressure condition.
As discussed in the background section, during normal operating conditions, a predetermined pressure is to be maintained within the fuel tank 26 by the sealing devices 36, 38. When the pressure within the fuel tank 26 reaches a predetermined super-atmospheric level, i.e., a pressure condition, the pressure valve 38 automatically opens to release the pressure. Preferably, the predetermined super-atmospheric level is between 15 and 17 kilo Pascal (kPa). In other words, when the pressure within the fuel tank 26 reaches lSkPa the pressure valve 38 will begin to open. When the pressure reaches l7kPa the pressure valve 38 will be opened entirely. When the pressure within the fuel tank 26 drops to a predetermined sub-atmospheric level, i.e., a vacuum condition, the vacuum valve 36 opens to similarly equalize the pressure.
A vent passageway 40 extends around the housing 28, 30 for providing fluid communicationbetween the sealing devices 36, 38 and the fuel tank 26. The housing 28, 30 also includes a chamber 42 disposed between the vacuum 36 and pressure 38 valves and in fluid communicationwith the vent passageway for providing fluid communicationbetweenthe fuel tank 26 and the vacuum 36 and pressure 3 8 valves. Accordingly, the pressure within the fuel tank 26 and filler neck 24 are directly experienced by the vacuum 36 and pressure 38 valves.
7 Docket No.: 65,158-009 The refilling assembly 20 is characterized by an actuator 44 pivotally mounted to the housing 28, 30 and selectively engaging the sealing device 36 for automatically lifting the sealing device 36 from the seated position to the unseated position when the filling nozzle 22 is partially received within the filler neck 24, thereby venting any pressurized fluid from the filler neck 24 before the filling nozzle 22 opens the filler neck 24. The actuator 44 therefore lifts the sealing device 36, optionally either the pressure 38 or vacuum 36 valve, regardless of the pressure within the fuel tank 26 to ensure a complete release of pressure. The release of pressure is preferably vented out to the atmosphere. This complete release of pressure is a safety measure which combats the deficiencies associated with the prior art designs discussed in the background section. As appreciated, the fuel tank may be pressurizedto almost 1 SkPa and the pressure valve 38 will not automatically release this pressure. This built-up pressure within the fuel tank 26 necessitates the need for the subject invention.
Referring also to Figures 4 and 5, the actuator 44 includes a cam 46 selectively engaging one of the sealing devices 36, 38 for lifting the sealing device 36, 3 8 to the unseated position when the filling nozzle 22 is partially received within the filler neck 24.
As appreciated, once the filling nozzle 22 opens the filler neck 24 the refilling of the fuel may commence. A liquid seal between the filling nozzle 22 and Docket No.: 65,158-009 the filler pipe 25 is created during the refueling. A mechanical seal (not shown) may also be used between the filling nozzle 22 and filler pipe 25 to create this seal. The liquid seal prevents any displaced fuel vapors from venting into the atmosphere.
Preferably, the fuel vapors will vent through an environmentally safe container such as a carbon canister (not shown).
The cam 46 is preferably an integral part of the actuator 44. The sealing device 36, 38 includes a post 48 selectively engaging the cam 46 of the actuator 44 for effecting movement of the sealing device 36, 38.
The actuator 44 is preferably a first flap 44 pivotally connected to the housing 28, 30 for selective engagementwith the filling nozzle 22. The first flap 44 extends partially into the lower housing portion 30. A second flap 50 is also pivotally connected to the housing 28, 30 and disposed below the first flap 44. In other words, the second flap 50 is positioned to engage the filling nozzle 22 after the filling nozzle 22 engages the first flap 44. A flap gasket 52 is mounted to a distal end of the housing 28, 30 and is engaged by the second flap 50 for sealing a portion of the housing 28, 30 from the filler neck 24 of the fuel tank 26.
Specifically, the second flap 50 seals the lower housing portion 30. As shown in Figures 4 and 6, a pair of springs 54 are mounted between the housing 28, 30 and the second flap for continuously biasing the second flap 50 against the flap gasket 52.
Preferably, the first flap 44 pivots in a clockwise direction and the second flap 50 pivots in a Docket No.: 6S,1S8-009 counter-clockwisedirection. The second flap 50 primarily seals the housing 28, from the filler pipe 25 and prevents any fuel vapor from escaping out the filler neck 24.
During insertion of the filling nozzle 22, the filling nozzle 22 first engages and pivots the first flap 44. This releases any built up pressure in the filler neck 24, filler pipe 25 and fuel tank 26. The filling nozzle 22 then hits the second flap 50 which urges the second flap 50 out of engagement with the flap gasket 52.
Since the pressure is released, there is no danger of splashing fuel and/or fuel vapors injuring the user. The filling nozzle 22 can now be completely inserted within the housing 28, 30 and the refilling of the fuel tank can begin.
In the preferred embodiment of Figures 2 through 6, the actuator 44, or first flap, engages the vacuum valve 36 when the actuator 44 is pivoted by the filling nozzle 22. The vacuum valve 36 includes a vacuum gasket 56 mounted to the housing 28, 30 and a sealing portion 58 extending from the post 48 for selective engagement with the vacuum gasket 56 to seal the filler neck 24. The vacuum gasket 56 preferably has an annular configuration with a pair of apertures (not numbered). One aperture provides an opening for the post 48 and the other aperture extends over a tab 60 which secures the vacuum gasket 5f to the lower housing portion 30. The sealing portion 58 and post 48 have a substantially T-shaped configuration when viewed in cross-section.
1 ~ Docket No.: 65,15&009 The actuator 44 selectively engages the post 48 to lift the sealing portion 58 from engagement with the vacuum gasket 56 to a position above the vacuum gasket 56 for venting the filler neck 24, filler pipe 25 and fuel tank 26 before the filling nozzle 22 opens the filler neck 24. The ventilating of the filler neck 24 is specifically achieved by opening a fluid passageway between the chamber 42 and the atmosphere via the unsealing of the vacuum gasket 56.
As also shown in Figure 3, the vacuum valve 36 includes a pair of vacuum springs 62 engaging the sealing portion 58 for continuously biasing the sealing portion 58 toward the engagement with the vacuum gasket 56.
Preferably, the sealing portion 58 has a curved configuration substantially in the shape of a banana. As appreciated, the vacuum valve 36 may have any suitable configuration so long as the filler neck 24, filler pipe 25 and fuel tank 26 may be automatically ventilated before the filling nozzle 22 is completely inserted within the housing 28, 30. One such variation of the vacuum valve 36 is disclosed in the alternative embodiment which is discussed in greater detail hereinbelow.
As illustrated in Figure 2, the housing 28, 30 includes an upwardly proj ecting pressure opening 64 for seating the pressure valve 3 8 and sealing the filler neck 24. Specifically, the pressure opening 64 extends from the upper housing portion 28. The pressure opening 64 is in fluid communicationwith the chamber such that the pressure valve 38 is in direct contact with the pressure exerted from the 1 1 Docket No.: 65,158-009 filler pipe 25.
The pressure valve 38 includes a pressure gasket 66 mounted to a pressure plate 68. The pressure valve 38 also includes an annular pressure spring 70 engaging the pressure plate 68 for continuously biasing the pressure gasket 66 against the pressure opening 64 of the housing 28, 30. As discussed above, the desired pressure which begins to lift the pressure valve 38 is lSkPa, i.e., super-atmospheric pressure. Accordingly, the annular pressure spring 70 must have a biasing force which equates to holding the pressure gasket 66 against the pressure opening 64 up to the lSkPa. Once the pressure within the filler neck 24 achieves 1 SkPa, the pressure plate 68 and gasket 66 will lift upward against the biasing force of the pressure spring 70 to open a fluid passageway between the chamber 42 and the atmosphere. Specifically, there are a number of openings 72 within one of the truncated cones 32 to vent the super-atmospheric pressure. As appreciated, the openings 72 may be holes formed within the cone 32 or gaps formed between the cones 32 and the lower housing portion 30.
Referring now to Figures 7 through 13, wherein like numerals increased by 100 indicate like or corresponding parts throughout the several views, an alternative embodiment of the fuel refilling assembly is shown. The fuel refilling assembly is generally shown at 120 in Figures 7, 8 and 9. As in the preferred embodiment, the refilling assembly 120 includes a housing having upper 128 and 12 Docket No.: 65,158-009 lower 130 housing portions mounted within a filler neck 124 of a fuel tank (not specifically shown in these figures). The actuator 144 is a first flap 144 and operates in substantially the same manner as above. However, the first flap 144 in this embodiment has a different shaped cam 146 and extends entirely across the lower housing portion 130. There is also a second flap 150 with a flap gasket 152 operating in substantially the same manner. Although the second flap 150 pivots clockwise and has a different spring arrangement. This alternative embodiment also has a similar vent passageway 140 and chamber 142 for creating a fluid passageway between the filler pipe 125 and the sealing devices. As above, the sealing devices include a pressure valve 138 and a vacuum valve 136. The sealing devices 136, also include a post 148 selectively engaging the cam 146 of the actuator 144 for moving one of the sealing devices 136, 138 to an unseated position. The primary difference between the preferred embodiment and this alternative embodiment is in the configuration and operation of the pressure 138 and vacuum 136 valves.
As illustrated in Figure 7, the fuel refilling assembly 120 is in a completely closed condition. Figure 8 shows the refilling assembly 120 in a partially open condition and Figure 9 shows the refilling assembly 120 in a fully open condition. To move the refilling assembly 120 to the partially open condition, the filling nozzle 22 is partially inserted into the housing 128, 130 and the actuator 144 engages the pressure valve 138. Specifically, the first flap 144 pivots which engages the cam 146 with the post 148 to lift the pressure valve 138.
13 Docket No.: 65,158-009 As also shown in Figures 10, 11 and 13, the housing 128, 130 includes an upwardly proj ecting pressure opening 164 for seating the pressure valve 138 and sealing the filler neck 124 and filler pipe 125. As discussed above, the post 148 selectively engages the pressure valve 13 8 to lift the pressure valve 13 8 from the seated position to a position above the pressure opening 164 for venting the filler neck 124, filler pipe 125 and fuel tank before the filling nozzle 22 opens the filler neck 124. The pressure valve 138 includes a pressure gasket 166 mounted to a pressure plate 168. The pressure valve 138 also includes an annular pressure spring 170 engaging the pressure plate 168 for continuously biasing the pressure gasket 166 against the pressure opening 164 of the housing 128, 130. The components of the pressure valve 138, i.e., the pressure gasket 166, pressure plate 168, and pressure spring 170, are substantiallythe same as those disclosed in the primary embodiment.
During normal operating conditions, the pressure valve 138 of this alternative embodiment operates in a similar fashion as the pressure valve 38 of the preferred embodiment. In other words, when the pressure within the fuel tank reaches a predetermined super-atmospheric level, the pressure valve 138 automatically opens to release the pressure. The predetermined super-atmospheric level is between lSkPa and l7kPa. The pressure valve 138, however, also releases all the pressure within the filler neck 124 and filler pipe 125 as the filling nozzle 22 is partially inserted into the housing 128, 130. As discussed in the preferred embodiment, with reference to the vacuum valve 36, this pressure valve 138 vents 14 Docket No.: 65,158-009 the filler neck 124 and filler pipe 125 by opening a fluid passageway between the chamber 142 and the atmosphere via the unsealing of the pressure gasket 166.
As also shown in Figures 10, 1 l and 12, the housing 128, 130 also includes a downwardly projecting vacuum opening 174 for seating the vacuum valve 136 and sealing the filler neck 124. The vacuum valve 136 includes a vacuum gasket 176 mounted to a vacuum plate 178. The vacuum valve 136 also includes an annular vacuum spring 180 engaging the vacuum plate 178 for continuously biasing the vacuum gasket 176 against the vacuum opening 174 of the housing 128, 130.
The vacuum valve 136 operates in a similar fashion as above such that when the pressure within the fuel tank drops to a predetermined sub-atmospheric level, the vacuum valve 136 opens to equalize the pressure. Specifically, the vacuum valve 136 opens to create a fluid passageway between the chamber 142 and the atmosphere.
As best shown in Figures 10 and 11, there are a number of pressure openings 164 and vacuum openings 174 disposed circumferentiallywithin the upper housing portion 128. Preferably, there are four pressure openings 164 and four vacuum openings 174 disposed in an alternating fashion. In addition, a notch is provided to guide the upward and downward movement of the pressure 164 and vacuum 174 seals.
15 Docket No.: 65,158-009 Many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.
16 Docket No.: 65,158-009
Claims (22)
1. A fuel refilling assembly for selectively receiving a filling nozzle to open and close a filler neck of a fuel tank, said assembly comprising;
a housing adapted for attachment to the filler neck to selectively receive the filling nozzle; and at least one sealing device movably mounted to said housing to move between seated and unseated positions for selectively equalizing any pressure within the filler neck;
said assembly characterized by an actuator movably mounted to said housing and selectively engaging said sealing device for responsively moving said sealing device from said seated position to said unseated position when the filling nozzle is partially received within the filler neck, thereby venting any pressurized fluid from the filler neck before the filling nozzle opens the filler neck.
a housing adapted for attachment to the filler neck to selectively receive the filling nozzle; and at least one sealing device movably mounted to said housing to move between seated and unseated positions for selectively equalizing any pressure within the filler neck;
said assembly characterized by an actuator movably mounted to said housing and selectively engaging said sealing device for responsively moving said sealing device from said seated position to said unseated position when the filling nozzle is partially received within the filler neck, thereby venting any pressurized fluid from the filler neck before the filling nozzle opens the filler neck.
2. An assembly as set forth in claim 1 wherein said actuator includes a cam selectively engaging said sealing device for moving said sealing device to said unseated position when the filling nozzle is partially received within the filler neck.
3. An assembly as set forth in claim 2 wherein said sealing device includes a post selectively engaging said cam of said actuator.
4. An assembly as set forth in claim 3 wherein said actuator is a first flap pivotally connected to said housing and positioned to selectively engage the filler nozzle.
5. An assembly as set forth in claim 4 further including a second flap pivotally connected to said housing and disposed to engage the filling nozzle after the filling nozzle engages the first flap.
6. An assembly as set forth in claim 5 further including a flap gasket mounted to a distal end of said housing and engaged by said second flap for sealing a portion of said housing from the filler neck of the fuel tank.
7. An assembly as set forth in claim 3 further including a vent passageway extending around said housing for providing fluid communication between said sealing device and the fuel tank.
8. An assembly as set forth in claim 7 wherein said sealing device includes a vacuum valve for allowing venting into the fuel tank when the fuel tank is in a vacuum condition; and a pressure valve for venting the fuel tank when the fuel tank is in a pressure condition.
9. An assembly as set forth in claim 8 wherein said housing includes a chamber disposed between said vacuum and pressure valves and in fluid communication with said vent passageway for providing fluid communication between the fuel tank and the vacuum and pressure valves.
10. An assembly as set forth in claim 9 wherein said actuator engages said vacuum valve.
11. An assembly as set forth in claim 10 wherein said vacuum valve includes a vacuum gasket mounted to said housing and a sealing portion extending from said post for selective engagement with said vacuum gasket to seal the filler neck, said actuator selectively engages said post to disengage said sealing portion from vacuum gasket to vent the filler neck and fuel tank before the filling nozzle is fully inserted to open the filler neck.
12. An assembly as set forth in claim 11 wherein said vacuum valve includes a pair of vacuum springs engaging said sealing portion for biasing said sealing portion toward said engagement with said vacuum gasket.
13. An assembly as set forth in claim 12 wherein said housing includes an upwardly projecting pressure opening for seating said pressure valve and sealing the filler neck.
14. An assembly as set forth in claim 13 wherein said pressure valve includes a pressure gasket mounted to a pressure plate.
15. An assembly as set forth in claim 14 wherein said pressure valve includes an annular pressure spring engaging said pressure plate for biasing said pressure gasket against said pressure opening of said housing.
16. An assembly as set forth in claim 9 wherein said actuator engages said pressure valve.
17. An assembly as set forth in claim 16 wherein said housing includes an upwardly projecting pressure opening for seating said pressure valve and sealing the filler neck, said post selectively engages said pressure valve to disengage said pressure valve from said seated position to a position relative to said pressure opening for venting the filler neck and fuel tank before the filling nozzle opens the filler neck.
18. An assembly as set forth in claim 17 wherein said pressure valve includes a pressure gasket mounted to a pressure plate.
19. An assembly as set forth in claim 18 wherein said pressure valve includes an annular pressure spring engaging said pressure plate for biasing said
20 pressure gasket against said pressure opening of said housing.
20. An assembly as set forth in claim 19 wherein said housing includes a downwardly projecting vacuum opening for seating said vacuum valve and sealing the filler neck.
20. An assembly as set forth in claim 19 wherein said housing includes a downwardly projecting vacuum opening for seating said vacuum valve and sealing the filler neck.
21. An assembly as set forth in claim 20 wherein said vacuum valve includes a vacuum gasket mounted to a vacuum plate.
22. An assembly as set forth in claim 21 wherein said vacuum valve includes an annular vacuum spring engaging said vacuum plate for biasing said vacuum gasket against said vacuum opening of said housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8467098P | 1998-05-07 | 1998-05-07 | |
| US60/0084,670 | 1998-05-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2271328A1 CA2271328A1 (en) | 1999-11-07 |
| CA2271328C true CA2271328C (en) | 2006-11-28 |
Family
ID=29709357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2271328 Expired - Lifetime CA2271328C (en) | 1998-05-07 | 1999-05-07 | Fuel refilling assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2271328C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012022394A1 (en) * | 2012-11-16 | 2014-05-22 | Illinois Tool Works Inc. | Kraftstoffeinfülleinrichtung |
| JP7107870B2 (en) * | 2019-02-25 | 2022-07-27 | トヨタ自動車株式会社 | Oil supply control device for internal combustion engine |
-
1999
- 1999-05-07 CA CA 2271328 patent/CA2271328C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2271328A1 (en) | 1999-11-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20190507 |