EP0636782A1 - Level probe/fuel feed pump combination in particular for a motor vehicle tank - Google Patents
Level probe/fuel feed pump combination in particular for a motor vehicle tank Download PDFInfo
- Publication number
- EP0636782A1 EP0636782A1 EP94202155A EP94202155A EP0636782A1 EP 0636782 A1 EP0636782 A1 EP 0636782A1 EP 94202155 A EP94202155 A EP 94202155A EP 94202155 A EP94202155 A EP 94202155A EP 0636782 A1 EP0636782 A1 EP 0636782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- tank
- fixed
- elastic
- 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.)
- Ceased
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
- F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
- F02M37/103—Mounting pumps on fuel tanks
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
To obviate the drawbacks both of in-tank fuel feed pumps associated with the fuel level indicator probe and of those installed along the feed line but without renouncing the advantages of both systems, the invention provides a fuel feed pump (4) of the type associated with the level probe (3), which is mounted elastically within a pocket (6) sealed against the tank interior by an elastic cowl (18).
Description
- This invention relates to a level probe/fuel feed pump combination in particular for a motor vehicle tank.
- Fuel feed pumps are required to overcome the head present between the tank and the engine.
- Pumps structured to be installed along the fuel pipe are known.
- These pumps are tendentially costly as they have to be individually fitted into a specific housing and require the fuel pipe to be interrupted, this being a possible cause of subsequent leakage.
- To reduce costs, feed pumps integral with the fuel level indicator probe have been conceived in order to form a monolithic unit which can be quickly fixed to the tank upper wall so that the pump lies within the tank.
- However because of the particular position of the pump such units suffer from safety problems especially with regard to any explosion which could occur following the slackening (including accidental slackening) of electrical connections.
- The object of the present invention is to obviate the aforesaid drawbacks by providing a level probe/fuel feed pump combination which is safe against explosion as is a pump housable along the pipe, while at the same time being simple and economical to install as it forms part of a combination which also comprises the level probe.
- These objects are attained by a level probe/fuel feed pump combination in particular for a motor vehicle tank, in accordance with
claims - In this combination the fuel feed pump is housed together with the level probe using the available space of the tank, and dips directly into the tank. The pump however remains outside said tank and poses no safety problems.
- The pump is illustrated by way of non-limiting example in the figures of the accompanying drawings.
- Figure 1 is a section through a first embodiment of a level probe/fuel feed pump combination according to the invention;
- Figure 2 shows an enlarged detail of the combination of Figure 1;
- Figure 3 is a section through a second embodiment of a level probe/fuel feed pump combination according to the invention;
- Figure 4 is a top plan view of the second embodiment of the level probe/fuel feed pump combination;
- Figure 5 is a view to an enlarged scale showing how the upper part of the pump of the second embodiment is fixed;
- Figure 6 is a view to an enlarged scale showing the gasket which aids the fixing of the lower part of the pump of the second embodiment.
- With reference to the aforesaid figures and in particular to Figures 1 and 2, the level probe/fuel feed pump combination of the invention, defined hereinafter simply as the combination and indicated overall by 1, comprises substantially a
flange 2, alevel probe 3 and afeed pump 4. - The
flange 2, which is usually of circular plan, comprises throughholes 5 in its edge for fixing it by screws (not shown) to the outside edge of an aperture provided in the upper wall of the tank, not shown. On that side which is to face the tank interior, theflange 2 supports thelevel probe 3, which is therefore located within the tank. Thelevel probe 3 is of known type and is therefore not described. It is preferably of the type described in Italian patent application 68525 A/81. - On that side of the
flange 2 which is to face the tank interior there is provided apocket 6 in which thefuel feed pump 4 is elastically mounted. Said pump dips into the tank at thebase 7 of saidpocket 6. A hydraulic seal between thepump 4 and thebase 7 of thepocket 6 is achieved at said point by interposing between said two elements anelastic cowl 18 fixed byhose clamps 8 at itslarger diameter edge 17 to thepocket 6 and fixed at itssmaller diameter edge 23 to thepump 4. - Preferably the
pocket 6 has a shape obtained by joining together along anaxis 10 three alignedtubular elements base 7. The diameter difference between the firsttubular element 9 and the second 10 results in afirst projection 13, which acts as a support for anelastic element 14 supporting thepump 4. Theelastic support element 14 for thepump 4 has an "L" cross-section, is fixed to thepump 4 by ahose clamp 15 and rests on thefirst projection 13. The diameter difference between the secondtubular element 10 and the third 11 results in asecond projection 16, to which thelarger diameter edge 17 of theelastic cowl 18 is fixed, itssmaller diameter edge 23 being fixed to thesuction pipe stub 19 of thepump 4. The elastic cowl is of double "U" cross-section. On thepipe stub 19 there is mounted atubular element 20 with which there is associated afilter 21 of the type which deforms elastically by the effect of the variation in distance between the upper and lower walls of the tank. - In this manner the pump can draw from the bottom of the tank until it is totally empty without being influenced by any tank deformation.
- The pump is mounted on the
flange 2 as follows. - The
elastic element 14 is fixed to thepump 4 by thehose clamp 15, and theelastic cowl 18 is fixed to thepipe stub 19 by one of the twohose clamps 8. The elasticity of thecowl 18 enables it to be folded over temporarily against thepipe stub 19 so that this latter, even though fixed to theelastic cowl 18, can be easily passed through thehole 22 in thebase 7 of thepocket 6. - The pump comes to rest when the
elastic element 14 encounters thefirst projection 13. Theelastic cowl 18 is fixed to thepocket 6 by theremaining hose clamp 8 at thesecond projection 16. - The
combination 1 is ready to be fixed to the tank by screws, not shown, engaging theholes 5. Asingle block 22 for the electrical connections relative to the level probe andpump 4 can be provided on that surface of theflange 2 facing outwards from the tank. - The described level probe/
feed pump combination 1 can be very easily mounted on the tank and is therefore of merit as it attains its objects in a simple and economical manner. However if for any reason thefeed pump 4 is subjected to a force tending to pull it out of thepocket 6 the resistance offered by theelastic cowl 18 along may not be sufficient to resist this. It is hence possible that as a result of vehicle jolting or collision thepump 4 overcomes the resistance offered by anelastic cowl 18 which has undergone ageing. - This problem is solved by the level probe/feed pump combination of the second embodiment indicated overall by 1A in Figures 3-6. For simplicity, in these figures those elements similar to or in common with the
combination 1 of the first embodiment are indicated by the same reference numerals. - With regard to such similar elements, that already stated with respect to the first embodiment of the combination is therefore valid.
- As can be seen, the
first projection 13, theelastic element 14 and thehose clamp 15 which in the first embodiment of thecombination 1 formed the means for fixing the upper part of thepump 4 are replaced by asecond flange 24,screws 25, afirst gasket 26 and athird projection 27. Thesecond flange 24 comprises at least one pair of firstannular projections 28 and is prolonged as far as the lateral surface of thefeed pump 4. Thefirst gasket 26 is of double "U" cross-section and also comprises at least one pair of secondannular projections 29. Thesecond flange 24 is fixed to thefirst flange 2 by thescrews 25. When theflanges first gasket 26 has one of itsannular projections 29 inserted between theannular projections 28 of theflange 24. The remainingannular projection 29 acts mainly to form a hydraulic seal against the body of thepump 4 and rests against thethird projection 27 to provide mechanical locking. When mounting, thefirst gasket 26 is initially associated with thesecond flange 24, which is then screwed into position by thescrews 25, to lock thepump 4 in its operating position. - As can be seen, the
hose clamp 8, thesecond projection 16, theedge 17 and theelastic cowl 18 which in the first embodiment of thecombination 1 formed the means for fixing the lower part of thepump 4 are replaced by asecond gasket 30 and anannular seat 31. - When mounting, the
second gasket 30 is arranged within theannular seat 31 after introducing thetubular element 20 so as to fix it to thebase 7 of thepocket 6. Thefirst gasket 26 is initially associated with thesecond flange 24. Thepump 4 is inserted into thepocket 6 such that the pipe stub is locked within theannular seat 31 by thesecond gasket 30. Thesecond flange 24 is then screwed into position by thescrews 25 to lock thepump 4 in its operating position. - The
pump 4 is therefore fixed to and supported on the walls of thepocket 6 bygaskets pump 4. - The
pump 4 can therefore not be withdrawn even by being deliberately pulled outwards from thepocket 6, for instance by pulling against the hydraulic and electrical connections emerging from it. This even applies in the case of complete deterioration of thefirst gasket 5. Thethird projection 27 would then interfere with thesecond flange 24 to prevent thepump 4 emerging from thepocket 6. - In the illustrated embodiment the
combination 1A has also been provided with astilling vessel 32 which can be fixed elastically to thepump 4 so as to be adaptable to the position of the tank base, as can thetubular element 20 by being of telescopic or bellows type.
Claims (6)
- A level probe/fuel feed pump combination (1) in particular for a motor vehicle tank, comprising a flange (2) to be fixed to the outside edge of an aperture provided in the tank upper wall, to support on that side which is to face the tank interior a level probe (3), characterised in that on that side of said flange (2) which is to face the tank interior there is provided a pocket (6) inside which there is supported via an elastic element (14) the feed pump (4), which dips into the tank in correspondence with the base of said pocket (6), at said point the hydraulic seal between the pump (4) and pocket (6) and their mutual fixing being achieved by interposing between said two elements an elastic cowl (18) fixed at its larger-diameter edge (17) to the pocket (6) and fixed at its smaller-diameter edge (23) to the pump (4).
- A combination as claimed in claim 1, characterised in that the pocket (6) has a shape obtained by coaxially (10) joining together three aligned tubular elements (9-11) having diameters which progressively decrease towards the base (7), the diameter difference between the first (9) and second (10) tubular element determining a first projection (13) forming a support for the elastic element (14) supporting the pump (4), the diameter difference between the second (10) and third (11) tubular element determining a second projection (16) at which the larger-diameter edge of the elastic cowl (18) is fixed.
- A combination as claimed in claim 2, characterised in that the elastic support element (14) for the pump (4) has an "L" cross-section, is fixed to the pump body (4) by a hose clamp (15) and rests on the first projection (13).
- A combination as claimed in claim 2, characterised in that the elastic cowl (18) is of "U" cross-section and is fixed by hose clamps (8).
- A combination as claimed in claim 1, characterised by comprising a filter (21) upstream of the pump (4) and able to deform elastically by the effect of the variation in distance between the upper wall and lower wall of the tank.
- A level probe/fuel feed pump combination (1) in particular for a motor vehicle tank, comprising a flange (2) to be fixed to the outside edge of an aperture provided in the tank upper wall, to support on that side which is to face the tank interior a level probe (3), characterised in that on that side of said flange (2) which is to face the tank interior there is provided a pocket (6) inside which there is positioned the fuel feed pump (4), which is elastically fixed at its top by a first gasket (26) provided with second annular projections (29) and interposed between a projection (27) on the pump (4) and a second flange (24) also provided with annular projections (28) and fixed to the first flange (2), said pump (4) dipping into the tank in correspondence with the base of said pocket (6), at said point the hydraulic seal between the pump (4) and pocket (6) and their mutual fixing being achieved by interposing between said two elements a second elastic gasket (30) housed in an annular seat (31) provided on the base (7) of the pocket (6) and simultaneously mounted on a suction pipe stub (19) of the pump (4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI930648 | 1993-07-30 | ||
ITMI930648 IT230631Y1 (en) | 1993-07-30 | 1993-07-30 | LEVEL PROBE-FUEL SUPPLY PUMP GROUP IN PARTICULAR FOR A VEHICLE TANK |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0636782A1 true EP0636782A1 (en) | 1995-02-01 |
Family
ID=11365616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94202155A Ceased EP0636782A1 (en) | 1993-07-30 | 1994-07-25 | Level probe/fuel feed pump combination in particular for a motor vehicle tank |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0636782A1 (en) |
IT (1) | IT230631Y1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2830283A1 (en) * | 2001-09-28 | 2003-04-04 | Marwal Systems | Motor vehicle fluid tank has pump is sealed chamber inside tank, connected to interior of tank by suction pipe |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6155361A (en) * | 1984-08-28 | 1986-03-19 | Nissan Motor Co Ltd | Fuel tank |
US4672937A (en) * | 1986-05-19 | 1987-06-16 | General Motors Corporation | Fuel pump system |
DE3914081A1 (en) * | 1989-04-28 | 1990-11-08 | Bosch Gmbh Robert | DEVICE FOR PROMOTING FUEL FROM A STORAGE TANK FOR THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE |
WO1990013739A1 (en) * | 1989-05-05 | 1990-11-15 | Carter Automotive Company, Inc. | Fuel supply module |
US5110265A (en) * | 1991-01-16 | 1992-05-05 | Aisan Kogyo Kabushiki Kaisha | Fuel pump |
GB2271327A (en) * | 1992-10-10 | 1994-04-13 | Ford Motor Co | A fuel tank reservoir. |
-
1993
- 1993-07-30 IT ITMI930648 patent/IT230631Y1/en active IP Right Grant
-
1994
- 1994-07-25 EP EP94202155A patent/EP0636782A1/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6155361A (en) * | 1984-08-28 | 1986-03-19 | Nissan Motor Co Ltd | Fuel tank |
US4672937A (en) * | 1986-05-19 | 1987-06-16 | General Motors Corporation | Fuel pump system |
DE3914081A1 (en) * | 1989-04-28 | 1990-11-08 | Bosch Gmbh Robert | DEVICE FOR PROMOTING FUEL FROM A STORAGE TANK FOR THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE |
WO1990013739A1 (en) * | 1989-05-05 | 1990-11-15 | Carter Automotive Company, Inc. | Fuel supply module |
US5110265A (en) * | 1991-01-16 | 1992-05-05 | Aisan Kogyo Kabushiki Kaisha | Fuel pump |
GB2271327A (en) * | 1992-10-10 | 1994-04-13 | Ford Motor Co | A fuel tank reservoir. |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 10, no. 218 (M - 503) 30 July 1986 (1986-07-30) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2830283A1 (en) * | 2001-09-28 | 2003-04-04 | Marwal Systems | Motor vehicle fluid tank has pump is sealed chamber inside tank, connected to interior of tank by suction pipe |
Also Published As
Publication number | Publication date |
---|---|
ITMI930648U1 (en) | 1995-01-30 |
ITMI930648V0 (en) | 1993-07-30 |
IT230631Y1 (en) | 1999-06-09 |
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