EP1183469A1 - High pressure pump with filler cap - Google Patents
High pressure pump with filler capInfo
- Publication number
- EP1183469A1 EP1183469A1 EP00936969A EP00936969A EP1183469A1 EP 1183469 A1 EP1183469 A1 EP 1183469A1 EP 00936969 A EP00936969 A EP 00936969A EP 00936969 A EP00936969 A EP 00936969A EP 1183469 A1 EP1183469 A1 EP 1183469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plug
- liquid
- seat
- neck
- reservoir
- 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.)
- Granted
Links
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
- F02M37/12—Feeding by means of driven pumps fluid-driven, e.g. by compressed combustion-air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
Definitions
- the present invention relates to a high pressure pump with an improved filling plug.
- the liquid transferred is the fuel.
- a high pressure pump for pumping a first liquid, called transferred liquid of the type comprising a main unit for pumping the transferred liquid actuated by a secondary unit for pumping a second liquid, called working liquid, the secondary unit comprising means for filling a reservoir of working liquid comprising a filling neck, connected to the reservoir, closable by a plug provided with a sealing surface intended to cooperate with a obturation seat formed in the neck.
- a pump of this type is described for example in WO 97/47883.
- the object of the invention is to propose means for filling the working liquid reservoir making it possible to completely fill this liquid reservoir, these means being moreover simple and easy to close.
- the subject of the invention is a high pressure pump, of the aforementioned type, characterized in that the neck is adapted to contain an overflow of working liquid in excess of the reservoir, the level of this overflow s' extending into the neck above the seat, the cap being movable in the neck, in the presence of the overflow of working liquid, between a pre-sealing position, in which the sealing surface is spaced from the seat, above this seat, and a closed position, in which the closed surface is in sealed contact with the seat.
- the reservoir is connected to means for compensating for expansion of the working liquid comprising a flexible membrane deformable as a function of variations in the volume of the working liquid;
- the stopper has a substantially axial blind hole, forming a receptacle for the overflow, communicating via a hole in the substantially radial stopper, with a peripheral recess of the stopper extended axially by the sealing surface, this recess being connected to the reservoir when the plug is in its pre-sealing position;
- the shutter surface and the shutter seat have generally conical shapes, the shutter surface converging towards the shutter seat;
- the plug can be moved by screwing between its pre-shutter and shutter positions;
- the plug is provided with an operating head through which opens the open end of the blind hole, the head being delimited by an external or internal polygonal operating surface;
- the stopper comprises a ball movable by force between its positions of pre-shutter and shutter, the surface of the ball forming the shutter surface of the plug;
- the transferred liquid is a fuel for an internal combustion engine of a motor vehicle.
- FIG. 2 is a sectional view along line 2-2 of Figure 1;
- Figure 3 is a sectional view along line 3-3 of Figure 1;
- FIG. 4 is a detail view of Figure 2 in which the cutting plane has been slightly offset so as to pass through the axis of the screw shown in these Figures 2 and 4;
- FIG. 5 is a detail view of the surrounded part 5 of Figure 3 showing a plug for closing means for filling a reservoir of the pump in a pre-closing position;
- FIG. 6 is a view similar to Figure 5 showing a first variant of the plug
- Figure 7 is a view similar to Figure 3 showing a second variant of the plug
- FIGS. 1 to 3 show a high pressure pump according to the invention, designated by the general reference 12.
- the pump 12 is intended for supplying high pressure fuel to an engine with internal combustion of motor vehicle.
- the pump 12 is therefore intended to pump a first liquid, namely fuel in the example described, called the transferred liquid.
- the main unit 18 is actuated by the secondary unit 20 according to general general operating principles described for example in WO 97/47883.
- the housing 16 comprises a body 22, of generally cylindrical shape, surrounding the secondary unit 20, and a cover 24, of generally cylindrical shape, surrounding the main unit 18.
- the housing body 22 and the cover 24 respectively form two ends opposite the housing 16.
- the housing body 22 is connected to the cover 24 by at least one screw 26, for example three screws 26.
- Each screw 26, preferably made of steel, extends substantially parallel to the axis X. A screw 26 will be described in more detail later.
- the main unit 18 is separated from the secondary unit 20 by a separation disc 28 centered substantially on the axis X.
- This disc 28 is preferably made of steel or cast iron.
- the main unit 18 comprises at least one flexible membrane 30 for pumping fuel, for example three membranes 30 as in the example illustrated. It will be noted that only two membranes 30 are shown in the figures, in particular in FIG. 3.
- the membrane 30 separates a fuel pumping chamber 32, arranged in the main unit 18, from a chamber 34 for compressing working liquid. , arranged in the secondary unit 20.
- the volume of the pumping chamber 32 is variable.
- the compression chamber 34 is partially provided in the separation disc 28.
- Each pumping chamber 32 is associated with a fuel suction valve 36 and a fuel delivery valve 38.
- These valves 36, 38 are carried by a body 40 housed in the cover 24 between a bottom of the latter and the separation disc 28.
- the body 22 of the housing, the cover 24 and the valve body 40 are made of aluminum or an aluminum-based alloy or another equivalent light metal.
- valves 36, 38 are connected in a manner known per se to the corresponding pumping chamber 32 as well as to a safety valve 42 of conventional structure and operation.
- each membrane 30 can be moved between a first position of maximum volume of the pumping chamber 32, as shown in particular in FIGS. 2 and 3, and a second position of minimum volume of this pumping chamber (not shown in the figures).
- the displacements of the membrane 30 are imposed in particular by the secondary unit 20 and control the opening and closing of the fuel suction and discharge valves 36, 38.
- Each membrane 30 is constantly returned elastically to its first position by a spring 44, called a membrane spring.
- Each valve 36, 38 communicates, on the one hand, with a fuel suction chamber 46 and, on the other hand, a fuel delivery chamber 48.
- the suction chamber 46 is connected in a manner known per se to the fuel supply connector 14.
- the fuel suction 46 and discharge 48 chambers are delimited, at least in part, by facing surfaces 50, 52, of generally cylindrical shape, with an axis substantially coinciding with the axis X.
- a first surface 50 forms an inner surface of the cover 24.
- the second surface 52 forms a peripheral surface of the valve body 40.
- the facing surfaces 50, 52 comprise two complementary shoulders 50E, 52E bearing between them so as to form a sealed joint plane separating the suction 46 and discharge 48 chambers. This joint plane is substantially perpendicular to the axis X.
- the shoulders 50E, 52E form an effective metal-metal seal.
- suction chamber 46 in which the pressure is lower than in the discharge chamber 48, is delimited by the bottom of the cover 24, the thickness of which is relatively small.
- discharge chamber 48 is delimited by a peripheral wall of the cover 24 which is thicker than the bottom of this cover, so as to withstand the high pressure reached by the fuel circulating in this delivery chamber.
- the secondary tank 20 comprises a piston 54 for compressing the working liquid associated with each membrane 30 and intended to move this membrane 30 between its two positions.
- the secondary tank 20 comprises three pistons 54, two of which only are visible in the figures, in particular in Figure 3
- the piston 54 is slidably mounted in a body 56, preferably made of steel or cast iron, so as to be movable substantially parallel to the axis X.
- the piston 54 extends between the chamber 34 for compression of the working liquid, formed partly in the piston body 56, and a reservoir 58 of working liquid.
- the end of the piston 54, external to the piston body 56, is resiliently returned by a spring 59 in contact with a rolling stop, for example a needle stop 60, carried by a bias plate 62 for actuating the pistons 54
- This bias plate is carried by a hub 64 of the secondary unit 20.
- This hub 64 is rotatably mounted around the axis X in the body 22 of the housing forming a bearing.
- the bias plate 62 rotates around the axis X together with the hub 64, the latter being connected to conventional drive means by a seal 66 of the Oldham type.
- the sealing of the working liquid between the housing body 22 and the hub 64 is ensured by conventional means comprising in particular an annular seal 67 made of elastomer.
- the hub 64 will be described in more detail later.
- each screw 26 is provided with a head 26T and a threaded body 26C.
- the head 26T is supported on a seat 68 passing through the housing body 22.
- the threaded body 26C is screwed into a threaded hole 70 formed in an ear 72 secured to the cover 24 Therefore, the body 22 of the housing, the intermediate assembly El and the body 40 of the valve are taught between the head 26T of the screw and the joint plane mate ⁇ a se by the shoulders 50E, 52E.
- the axial dimension Ll of the intermediate assembly El is substantially equal to the length L2 of the part of the body 26C of the screw extending between the head 26T of this screw and the tapped hole 70
- the dilations of the different materials namely, on the one hand, aluminum or light metal and, on the other hand, steel or cast iron, are substantially identical inside and outside of the housing 16.
- the piston 54 is provided with an axial bore 74 through which the working liquid can flow between the reservoir 58 and the compression chamber 34.
- the bore 74 is stepped and comprises a section 74A of large diameter, opening into the compression chamber 34, and a section 74B of small diameter, opening into the reservoir 58.
- a ball, forming a valve 76 is housed in the section 74A of large diameter so as to be movable, on the one hand, between a shoulder E74, separating the sections 74A and 74B, forming a seat for closing the valve 76, and on the other hand, a stop 78 for limiting the opening stroke of this valve 76.
- the valve 76 opens as soon as the pressure of the working liquid in the reservoir 58 exceeds that of the working liquid in the compression chamber 34. Otherwise, the valve 76 closes so as to close the bore 74.
- the stiffness of the return spring 44 for the diaphragm 30 associated with the piston 54 is dimensioned in such a way that this spring 44 maintains the working liquid contained in the compression chamber 34 under overpressure relative to the working liquid contained in the reservoir 58, this as long as the membrane 44 has not reached its first position of maximum volume of the pumping chamber 32.
- the membrane spring 44 allows the automatic return of the membrane 30 to its first position, this even in the absence of fuel in the main pumping unit 18. Furthermore, when the piston 54 moves towards the left considering Figures 2 and 3, given the leakage of working liquid between the compression chamber 34 and the reservoir 58, the membrane 30 reaches its first position before the piston 54 completes its stroke to the left. Consequently, once the membrane 30 reaches its first position, the pressure of the working liquid in the compression chamber 34 drops relative to that of the working liquid in the reservoir 58, which causes the valve 76 to open and replenishing the compression chamber 34 with working liquid so as to compensate for leaks.
- These filling means comprise a filling neck 80, connected to the reservoir 58, closable by a plug 82.
- the plug 82 is intended to cooperate by screwing with the neck 80.
- the plug 82 has a blind hole 84, substantially axial, communicating via a hole 86 in the plug , substantially radial, with a peripheral recess 88 of the plug extended axially by a sealing surface 90 of this plug intended to cooperate with a sealing seat 92 formed in the end of the neck 80 close to the reservoir 58.
- the shutter surface 90 and shutter seat 92 have generally conical shapes, the shutter surface 90 converging towards the shutter seat 92.
- the plug 82 is movable in the neck 80, by screwing, between a pre-sealing position of the reservoir 58, in which the closure surface 90 is separated from the seat 92, above this seat 92, as shown in FIG. 5, and a closed position of this reservoir 58, in which the closed surface 90 is in leaktight contact with the seat 92, as shown in FIG. 3.
- the neck 80 is likely to contain an overflow of working liquid in excess of the reservoir, the level N of this overflow extending in the neck 80 above the seat 92.
- the plug 82 when the plug 82 is in its pre-sealing position, the peripheral recess 88 of this plug communicates with the reservoir 58, so that the blind hole 84 forms a receptacle for the overflow of working liquid. Furthermore, in the presence of the overflow in the neck 80, the plug 82 can be moved in this neck between its pre-shutting and shutter positions.
- the plug 82 To move the plug 82, the latter is provided with an operating head 82T through which opens the open end of the blind hole 84.
- the head 82T is delimited by a polygonal inner surface 821 allowing the plug 82 to be operated with using a conventional tool.
- the maneuvering head 82T can be delimited by a polygonal outer surface 82E as shown in FIG. 6, for maneuvering the plug 82 using a conventional tool.
- the plug 82 po ⁇ e an O-ring peripheral seal 93 positioned axially between the head 82T and the recess 88. This seal 93 seals between the neck 80 and the plug 82 above the recess 88.
- the plug 82 makes it possible to fill the reservoir 58 under vacuum in the following manner.
- the plug 82 is screwed into the neck 80 in its pre-sealing position as shown in FIG. 5.
- the reservoir 58 is connected to conventional means 94 for compensating for the expansion of the working liquid contained in the reservoir 58.
- These means comprise a flexible membrane 96 separating a channel 98 for setting communication of the membrane 96 with the working liquid of the reservoir 58 and a space 100 for release of the membrane 96 protected by a shell 102 of generally hemispherical shape.
- the membrane 96 deforms as a function of the variations in the volume of working liquid contained in the reservoir 58.
- the plug 82 comprises a ball 104 which can be forcibly moved between a position for pre-closing the reservoir 58, as shown in dashed lines in the figure. 7, and a position for closing off this reservoir 58, as shown in solid lines in this FIG. 7.
- the surface of the ball 104 forms the sealing surface intended to cooperate in a sealed manner with the seat 92 of the neck.
- the filling neck 80 is closed using the ball 104 as follows.
- the ball 104 In the presence of the overflow of working liquid, the level N of which is shown in phantom in FIG. 7, the ball 104 is placed in its pre-sealing position as shown in phantom in this figure 7. Then, forcibly moves the ball 104 in the neck 80 so as to press it against the seat 92, as shown in solid line in FIG. 7.
- the hub 64 will be described below in more detail with reference to FIG. 3.
- the hub 64 comprises a sleeve 106, with an axis coinciding with the axis X, in which the bias plate 62 is housed.
- the hub 64 also comprises a ring 108 fixed on the external surface of the sleeve 106.
- the external surface of the sleeve 106 forms a peripheral cylindrical surface SG for guiding the hub in rotation in the body 22 of the housing.
- One face of the ring 108 forms a shoulder FE for axial positioning of the hub 64 by comparison with the body 22 of the housing.
- the housing body 22 comprises a jacket 110, the internal surface of which forms a cylindrical surface with a bearing surface SP in sliding contact with the peripheral guide surface SG of the hub.
- the housing body 22 also includes a washer 112, disposed at one end of the jacket 110, provided with a face forming a flat surface of po ⁇ ée FP in sliding contact with the shoulder FE of the hub.
- the jacket 110 and the washer 112 are fixed in a manner known per se to the housing body 22 and are made of conventional materials, preferably with a low coefficient of friction.
- the shoulder FE of the hub 64 extending the guide surface SG of this hub, is urged to bear against the porous face FP of the housing body 22 by the elastic return force of the pistons 54 in contact with the stop. with needles 60 as well as by the pressure of the working liquid in contact with the bias plate 62.
- the cylindrical surface of the bearing SP is formed by the internal surface of a sleeve 1 14, carried by the housing body 22, provided with an end extended by a flange 116 defining the surface FP range plane.
- the peripheral guide surface SG of the hub is formed by the external surface of a sleeve 118, in which is housed the bias plate 62, provided with an end extended by a collar 120 delimiting the axial positioning shoulder FE of the hub.
- the sleeve 118 of the hub cooperates with a sleeve 114 secured to the housing body 22 of the type shown in FIG. 8.
- the peripheral guide surface SG and the positioning shoulder axial FE of the hub are formed by the external surface of a stepped tubular member 122, in one piece, in which is housed the bias plate 62.
- the stage member 122 can be fab ⁇ que easily in conventional manner, in particular by stamping, treatment and rectification
- the stage member 122 is in sliding contact with a cyhndnque surface of range SP and a plane surface of poHée FP formed on elements similar to those represented in FIG. 3.
- the peripheral guide surface SG of the stage member 122 is in contact with rolling needles 124 extending substantially parallel to the axis X, and the axial positioning shoulder FE is in contact with rolling needles 126, extending substantially radially with respect to the axis X.
- the needles 124, 126 are carried by cages 128, 130 fixed in a manner known per se to the housing body 22
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9907216 | 1999-06-08 | ||
FR9907216A FR2794813B1 (en) | 1999-06-08 | 1999-06-08 | HIGH PRESSURE PUMP WITH IMPROVED FILLING CAP |
PCT/FR2000/001467 WO2000075516A1 (en) | 1999-06-08 | 2000-05-29 | High pressure pump with filler cap |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1183469A1 true EP1183469A1 (en) | 2002-03-06 |
EP1183469B1 EP1183469B1 (en) | 2003-09-10 |
Family
ID=9546516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00936969A Expired - Lifetime EP1183469B1 (en) | 1999-06-08 | 2000-05-29 | High pressure pump with filler cap |
Country Status (7)
Country | Link |
---|---|
US (1) | US6726458B1 (en) |
EP (1) | EP1183469B1 (en) |
JP (1) | JP4480929B2 (en) |
DE (1) | DE60005178T2 (en) |
ES (1) | ES2209899T3 (en) |
FR (1) | FR2794813B1 (en) |
WO (1) | WO2000075516A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3612727A (en) * | 1969-10-17 | 1971-10-12 | Crane Co | Metering pump |
DE7303301U (en) * | 1973-01-30 | 1974-04-04 | Feluwa Schlesiger & Co Kg | Diaphragm piston pump |
US4392787A (en) * | 1981-01-21 | 1983-07-12 | Wetrok Inc. | Diaphragm pump |
EP0085725B1 (en) * | 1982-02-05 | 1984-11-28 | Bran & Lübbe GmbH | Piston-driven diaphragm pump |
US4798306A (en) * | 1987-03-04 | 1989-01-17 | General Motors Corporation | Fuel tank venting |
US5707219A (en) * | 1995-10-04 | 1998-01-13 | Wanner Engineering | Diaphragm pump |
WO1997047883A1 (en) | 1996-06-07 | 1997-12-18 | Hydro Rene Leduc | High pressure pump for all liquids |
-
1999
- 1999-06-08 FR FR9907216A patent/FR2794813B1/en not_active Expired - Fee Related
-
2000
- 2000-05-29 ES ES00936969T patent/ES2209899T3/en not_active Expired - Lifetime
- 2000-05-29 WO PCT/FR2000/001467 patent/WO2000075516A1/en active IP Right Grant
- 2000-05-29 US US10/009,338 patent/US6726458B1/en not_active Expired - Fee Related
- 2000-05-29 DE DE60005178T patent/DE60005178T2/en not_active Expired - Lifetime
- 2000-05-29 EP EP00936969A patent/EP1183469B1/en not_active Expired - Lifetime
- 2000-05-29 JP JP2001501766A patent/JP4480929B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0075516A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2003501588A (en) | 2003-01-14 |
DE60005178D1 (en) | 2003-10-16 |
JP4480929B2 (en) | 2010-06-16 |
DE60005178T2 (en) | 2004-07-15 |
FR2794813A1 (en) | 2000-12-15 |
FR2794813B1 (en) | 2001-09-21 |
ES2209899T3 (en) | 2004-07-01 |
EP1183469B1 (en) | 2003-09-10 |
WO2000075516A1 (en) | 2000-12-14 |
US6726458B1 (en) | 2004-04-27 |
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