CN107201978B - Fuel pump module - Google Patents
Fuel pump module Download PDFInfo
- Publication number
- CN107201978B CN107201978B CN201710053483.5A CN201710053483A CN107201978B CN 107201978 B CN107201978 B CN 107201978B CN 201710053483 A CN201710053483 A CN 201710053483A CN 107201978 B CN107201978 B CN 107201978B
- Authority
- CN
- China
- Prior art keywords
- fuel pump
- resin molded
- molded body
- end surface
- discharge port
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Abstract
The invention provides a fuel pump module, which can omit a special sealing mechanism when a fuel pump is coated by a resin molding body. The fuel pump module (13) has: a resin molded body (34) that covers the fuel pump (21) in a region including the discharge port (33) and that defines a discharge flow path (35) that communicates with the discharge port (33); and a check valve (41) having a valve body (42), wherein the valve body (42) is disposed in the discharge flow path (35), and the valve body (42) is seated in accordance with a valve body downstream pressure that is greater than a valve body upstream pressure that communicates with the discharge port (33).
Description
Technical Field
The present invention relates to a fuel pump module having a fuel pump with a suction port and a discharge port for fuel.
Background
Patent document 1 discloses a fuel pump module. A fuel pump is assembled in the fuel pump module. A check valve is disposed in the discharge pipe of the fuel pump. When the operation of the fuel pump is stopped and the discharge pressure is lowered, the valve body is seated to prevent the fuel from flowing back to the fuel pump. At this time, a high pressure is maintained on the downstream side of the spool.
Documents of the prior art
Patent document 1: japanese patent laid-open publication No. 2009-162155
The discharge pipe of the fuel pump is fitted into the connecting cylinder of the resin mold block. A sealing member is interposed between the discharge pipe and the connecting cylinder. When the check valve is closed, a boundary between the discharge pipe and the coupling cylinder is exposed to a higher pressure downstream of the spool. The fuel permeates along the boundary according to the pressure. The sealing member prevents leakage of the permeated fuel.
Disclosure of Invention
The invention aims to provide a fuel pump module which can omit a special sealing mechanism when a fuel pump is coated by a resin molding body.
According to a 1 st aspect of the present invention, there is provided a fuel pump module comprising: a fuel pump having a suction port and a discharge port for fuel; a resin molded body that covers the fuel pump in a range including the discharge port and defines a discharge flow path communicating with the discharge port; and a check valve having a valve body disposed in the discharge flow path and seated in response to a valve body downstream pressure that is greater than a valve body upstream pressure that communicates with the discharge port.
According to the 2 nd aspect, in the structure of the 1 st aspect, the resin molded body has a connection pipe including the check valve, the connection pipe having an outer shape connected to a pipe and defining the discharge flow path communicating with the pipe.
According to the 3 rd aspect, in addition to the structure of the 1 st or 2 nd aspect, a labyrinth seal is arranged between the fuel pump and the resin molded body in a range including the discharge port.
According to the 4 th aspect, in addition to the structure of the 3 rd aspect, the labyrinth seal includes a groove formed on an end surface of the fuel pump coaxially with a center axis of the discharge port.
According to the 5 th aspect, in addition to the structure of any one of the 1 st to 4 th aspects, the resin molded body has a coupler having a connection terminal connected to a lead wire extending from the fuel pump.
According to the 6 th aspect, in addition to the structure of any one of the 1 st to 5 th aspects, the resin molded body has a mounting piece.
According to the first aspect, when the operation of the fuel pump is stopped and the discharge pressure is reduced, the pressure is higher on the valve body downstream side than on the valve body upstream side, and the valve body is seated. The check valve closes. A higher pressure is maintained on the downstream side of the spool. Since the upstream side of the valve body is depressurized, the boundary between the fuel pump and the resin molded body is not exposed to a high pressure. This prevents fuel infiltration along the boundary. A special sealing mechanism that prevents the infiltration of fuel can be omitted. Further, the presence or absence of the check valve can be selected without changing the structure of the fuel pump itself, and the fuel pump can be made common among a plurality of types of fuel pumps, thereby reducing development costs and production facilities and management man-hours.
According to the second aspect of the present invention, since the check valve is housed in the protruding connecting pipe, the arrangement space of the check valve can be minimized.
According to the 3 rd aspect, since the labyrinth seal is arranged, the area of the boundary between the fuel pump and the resin molded body can be increased in a limited space, and as a result, the coupling force between the fuel pump and the resin molded body is increased, and the sealing property between the fuel pump and the resin molded body is enhanced.
According to the 4 th aspect, since the groove is formed in the end surface of the fuel pump, the resin material can flow into the groove at the time of molding the resin molded body, and the labyrinth structure can be easily established.
According to the 5 th aspect, since the coupler is integrated with the resin molded body, the fuel pump and the connection terminal are reliably electrically connected. When such an electrical connection is realized, the fuel pump module can be miniaturized. The manufacturing cost is reduced.
According to the 6 th aspect, since the mounting piece used when fixing the fuel pump module to another member is integrated with the resin molded body, a coupling mechanism such as a snap-fit portion can be omitted when assembling the fuel pump module and the mounting piece, and as a result, the fuel pump module can be downsized. The work of assembling the mounting piece on the fuel pump can be omitted, and the manufacturing cost can be reduced.
Drawings
Fig. 1 is a vertical sectional view schematically showing the overall structure of a fuel pump module of an embodiment.
Description of the reference symbols
13: a fuel pump module; 17: piping (fuel piping); 21: a fuel pump; 29: a suction port (suction path); 33: an outlet port; 34: a resin molded body; 35: a discharge flow path; 36: a labyrinth seal; 37: a groove; 38: a connection pipe (2 nd connection pipe); 39: mounting a sheet; 41: a check valve; 42: a valve core; 45: a coupler; 47: a connection terminal; 48: and (4) conducting wires.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 schematically shows a fuel supply system 11 of an embodiment. The fuel supply system 11 has an injector 12, a fuel pump module 13, and a fuel tank 14. The injector 12 is inserted into an intake passage 16 of an internal combustion engine (abbreviated as EN in the drawing) 15. The fuel pump module 13 is connected to the injector 12 through a fuel pipe 17. Fuel is supplied to the injector 12 from the fuel pump module 13 at a prescribed pressure. The fuel tank 14 is connected to the fuel pump module 13 via a fuel line 18. Fuel is stored in the fuel tank 14. The fuel pump module 13 is refueled from a fuel tank 14.
The fuel pump module 13 has a fuel pump 21. The housing 22 of the fuel pump 21 is composed of a cylindrical case 23, a 1 st end surface member 24, and a 2 nd end surface member 25, the 1 st end surface member 24 being coupled to one end of the case 23, and the 2 nd end surface member 25 being coupled to the other end of the case 23. Between the 1 st end surface member 24 and the 2 nd end surface member 25, an impeller 26 and an electric motor 27 are housed in the casing 23. The rotation shaft 28 of the impeller 26 is supported by the 1 st end surface member 24 and the 2 nd end surface member 25 so as to be rotatable about the axial center. The rotor 27a of the electric motor 27 is coupled to the rotary shaft 28. A stator 27b is disposed around the rotor 27 a. The electric motor 27 operates in response to the supply of electric current. The electric motor 27 causes rotation of the rotating shaft 28. The 2 nd end surface member 25 is molded from a resin material having a relatively high melting point. Examples of such resin materials include PPS resins. The 1 st end surface member 24 and the housing 23 may be formed of a metal material.
The 1 st end surface member 24 is provided with a 1 st connection pipe 31 defining the suction passage 29. The suction passage 29 opens to the outside at a suction port at one end. The fuel pipe 18 communicating with the fuel tank 14 is coupled to the 1 st connection pipe 31. The other end of the suction passage 29 is connected to the impeller chamber 32. The impeller 26 is disposed in the impeller chamber 32. When the impeller 26 rotates with the rotation of the rotary shaft 28, fuel is introduced from the suction port into the impeller chamber 32.
The 2 nd end surface member 25 defines a discharge port 33. When the impeller 26 rotates, the fuel is discharged from the discharge port 33. The fuel flows from the impeller chamber 32 into the discharge port 33 under a predetermined pressure.
The fuel pump module 13 includes a resin molded body 34. The fuel pump 21 is covered with a resin molded body 34 in a range including the discharge port 33. The resin molded body 34 is molded from a resin material having a lower melting point than the 1 st end surface member 24 and the 2 nd end surface member 25. Examples of such resin materials include POM resins. The resin molded body 34 defines a discharge flow path 35 communicating with the discharge port 33 of the fuel pump 21.
A labyrinth seal 36 is disposed between the discharge port 33 of the fuel pump 21 and the resin molded body 34. The labyrinth seal 36 includes a groove 37, and the groove 37 is formed on the 2 nd end surface member 25 of the fuel pump 21 coaxially with the center axis of the discharge port 33. The resin molded body 34 is inserted into the groove 37.
The resin molded body 34 has a 2 nd connection pipe 38. The 2 nd connection pipe 38 has an outer shape connected to the fuel pipe 17 communicating with the injector 12. The 2 nd connecting pipe 38 defines a discharge flow path 35. The discharge flow path 35 communicates with the fuel pipe 17.
The resin molded body 34 has a mounting piece 39. The mounting piece 39 defines a mounting surface extending in 1 plane parallel to the axial center of the rotary shaft 28, for example. The attachment piece 39 may extend from a bus line of the case 23 to the outside of the case 23, for example.
The fuel pump module 13 has a check valve 41. The check valve 41 is assembled in the 2 nd connection pipe 38. The check valve 41 has a valve body 42 disposed in the discharge flow path 35. The valve body 42 is seated in accordance with a valve body downstream side pressure that is greater than a valve body upstream side communicating with the discharge port 33. A valve spring 44 that exerts an elastic force that presses the valve body 42 against the valve seat 43 is disposed on the valve body 42. When the valve body upstream side pressure is larger than the valve body downstream side pressure, the valve body 42 separates from the valve seat 43. The check valve 41 is opened.
The fuel pump module 13 has a coupling 45. The coupler 45 is assembled to the resin molded body 34. The resin molded body 34 forms the socket 46. The connection terminal 47 protrudes into the socket 46. A lead 48 extending from the electric motor 27 of the fuel pump 21 is connected to the connection terminal 47. A male coupler (not shown) is fitted into the receptacle 46. A drive current is supplied from the connection terminal 47 to the electric motor 27.
When the operation of the fuel pump 21 is stopped and the discharge pressure decreases, the pressure is higher on the valve body downstream side than on the valve body upstream side, and the valve body 42 is seated. The check valve 41 is closed. A higher pressure is maintained on the downstream side of the spool 42. Since the upstream side of the valve body 42 is depressurized, the boundary between the fuel pump 21 and the resin molded body 34 is not exposed to a high pressure. This prevents fuel infiltration along the boundary. A special sealing mechanism that prevents the infiltration of fuel can be omitted. Further, the presence or absence of the check valve 41 can be selected without changing the structure of the fuel pump 21 itself, and it is possible to make the fuel pump 21 common to a plurality of types of machines, thereby reducing development costs and production facilities and management man-hours.
In the fuel pump module 13, a check valve 41 is assembled in the 2 nd connection pipe 38 of the resin molded body 34. Since the check valve 41 is housed in the projecting 2 nd connection pipe 38, the arrangement space of the check valve 41 can be minimized. Space saving is achieved with respect to the arrangement of the fuel pump module 13.
A labyrinth seal 36 is disposed between the fuel pump 21 and the resin molded body 34 in a range including the discharge port 33. Therefore, the area of the boundary (contact area) between the fuel pump 21 and the resin molded body 34 can be increased in a limited space, and as a result, the coupling force between the fuel pump 21 and the resin molded body 34 is increased, and the sealing performance between the fuel pump 21 and the resin molded body 34 is enhanced. Here, regarding the construction of the labyrinth seal 36, a groove 37 is formed on the surface of the 2 nd end surface member 25. The resin material can flow into the groove 37 at the time of resin molding of the resin molded body 34, and the labyrinth structure can be easily established.
The coupler 45 is integrated with the resin molded body 34. Therefore, the fuel pump 21 and the connection terminal 47 are reliably electrically connected. In achieving such electrical connection, miniaturization of the fuel pump module 13 is achieved. The manufacturing cost is reduced.
The resin molded body 34 has a mounting piece 39. The mounting piece 39 is formed at a time when the resin molded body 34 is molded with resin. This can reduce the number of steps in the production process of the fuel pump module 13. The manufacturing cost is reduced.
Injection molding is used in the manufacture of the fuel pump module 13. In injection molding, a cavity is defined in the mold that resembles the fuel pump module 13. The structural elements of the fuel pump 21 and the coupling 45 are disposed in the cavity. The material of the resin molding 34 flows into the cavity. At this time, since the melting point of the 2 nd end surface member 25 is higher than that of the resin molded body 34, the 2 nd end surface member 25 maintains a solid state when the material is poured. The resin molded body 34 is formed as the resin is molded. After the resin molded body 34 is molded, the components of the check valve 41 are inserted into the 2 nd connection pipe 38 and fixed by heat caulking.
Claims (5)
1. A fuel pump module, characterized in that the fuel pump module has:
a fuel pump (21) having a fuel suction port (29) and a fuel discharge port (33);
a resin molded body (34) molded so as to cover the fuel pump (21) in a range including the discharge port (33), and defining a discharge flow path (35) communicating with the discharge port (33); and
a check valve (41) having a valve body (42), the valve body (42) being disposed in the discharge flow path (35), the valve body (42) being seated in response to a valve body downstream pressure that is greater than a valve body upstream pressure that communicates with the discharge port (33),
the housing (22) of the fuel pump (21) is composed of a housing (23), a 1 st end surface member (24) and a 2 nd end surface member (25), the 1 st end surface member (24) is held at one end of the housing (23), the 2 nd end surface member (25) is joined to the other end of the housing (23), and the 2 nd end surface member (25) defines the discharge port (33),
the resin molded body (34) is molded from a resin material having a lower melting point than the 2 nd end surface member (25),
a labyrinth seal (36) is disposed between the fuel pump (21) and the resin molded body (34) in a range including the discharge port (33),
a groove (37) is formed in the surface of the 2 nd end surface member (25), and the labyrinth seal (36) is formed by a resin material flowing into the groove (37) at the time of resin molding of the resin molded body (34).
2. The fuel pump module of claim 1,
the resin molded body (34) has a connection pipe (38) including the check valve (41), and the connection pipe (38) has an outer shape connected to a pipe (17) and defines the discharge flow path (35) communicating with the pipe (17).
3. The fuel pump module of claim 1 or 2,
the groove (37) is formed on the surface of the 2 nd end surface member (25) coaxially with the center axis of the discharge port (33).
4. The fuel pump module of claim 1 or 2,
the resin molded body (34) has a coupler (45), and the coupler (45) has a connection terminal (47) connected to a lead (48) extending from the fuel pump (21).
5. The fuel pump module of claim 1 or 2,
the resin molded body (34) has a mounting piece (39).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016052573A JP6182231B1 (en) | 2016-03-16 | 2016-03-16 | Fuel pump module |
| JP2016-052573 | 2016-03-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107201978A CN107201978A (en) | 2017-09-26 |
| CN107201978B true CN107201978B (en) | 2021-01-15 |
Family
ID=59605037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710053483.5A Active CN107201978B (en) | 2016-03-16 | 2017-01-24 | Fuel pump module |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6182231B1 (en) |
| CN (1) | CN107201978B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620208A (en) * | 1995-05-19 | 1997-04-15 | Lockheed Idaho Technologies Company | Boltless flange |
| CN101387249A (en) * | 2008-10-17 | 2009-03-18 | 薛肇江 | Electric fuel pump |
| JP2009222055A (en) * | 2008-02-22 | 2009-10-01 | Denso Corp | Fuel pump |
| CN101865056A (en) * | 2009-04-16 | 2010-10-20 | 株式会社电装 | Petrolift |
| CN103590941A (en) * | 2013-10-24 | 2014-02-19 | 安徽工贸职业技术学院 | Anticorrosive fuel pump |
| CN203686406U (en) * | 2014-01-16 | 2014-07-02 | 台州市明利阀门管件有限公司 | Pipe fitting joint structure |
| CN205036740U (en) * | 2015-08-26 | 2016-02-17 | 鞍山海量有色金属材料制造有限公司 | No water cooling large flange |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4192391B2 (en) * | 2000-03-31 | 2008-12-10 | 株式会社デンソー | Fuel supply device |
| JP2005110477A (en) * | 2003-10-02 | 2005-04-21 | Aisan Ind Co Ltd | Motor and pump |
| JP2005226557A (en) * | 2004-02-13 | 2005-08-25 | Denso Corp | Fuel injection valve |
| JP4587124B2 (en) * | 2005-10-07 | 2010-11-24 | 株式会社デンソー | Fuel pump |
| JP5048525B2 (en) * | 2008-01-08 | 2012-10-17 | 株式会社ケーヒン | Fuel supply module |
| JP5438383B2 (en) * | 2008-09-29 | 2014-03-12 | 山洋電気株式会社 | Molded motor |
| JP2013096323A (en) * | 2011-11-02 | 2013-05-20 | Mitsubishi Electric Corp | Fuel supply device |
-
2016
- 2016-03-16 JP JP2016052573A patent/JP6182231B1/en active Active
-
2017
- 2017-01-24 CN CN201710053483.5A patent/CN107201978B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620208A (en) * | 1995-05-19 | 1997-04-15 | Lockheed Idaho Technologies Company | Boltless flange |
| JP2009222055A (en) * | 2008-02-22 | 2009-10-01 | Denso Corp | Fuel pump |
| CN101387249A (en) * | 2008-10-17 | 2009-03-18 | 薛肇江 | Electric fuel pump |
| CN101865056A (en) * | 2009-04-16 | 2010-10-20 | 株式会社电装 | Petrolift |
| CN103590941A (en) * | 2013-10-24 | 2014-02-19 | 安徽工贸职业技术学院 | Anticorrosive fuel pump |
| CN203686406U (en) * | 2014-01-16 | 2014-07-02 | 台州市明利阀门管件有限公司 | Pipe fitting joint structure |
| CN205036740U (en) * | 2015-08-26 | 2016-02-17 | 鞍山海量有色金属材料制造有限公司 | No water cooling large flange |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107201978A (en) | 2017-09-26 |
| JP6182231B1 (en) | 2017-08-16 |
| JP2017166417A (en) | 2017-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080063546A1 (en) | Electric fuel pump | |
| CN111492143B (en) | Gerotor pump and method of manufacturing the same | |
| US20070065315A1 (en) | Fluid pump having bearing hold | |
| KR102209164B1 (en) | Fuel pump | |
| JP4561761B2 (en) | Fuel supply device | |
| JP5271113B2 (en) | Fuel supply device | |
| JP4923123B2 (en) | Fuel supply device | |
| CN101205875A (en) | Fuel supply device | |
| US10148150B2 (en) | Liquid pump | |
| JP4192391B2 (en) | Fuel supply device | |
| US9574530B2 (en) | Fuel pump module and method of manufacturing the same | |
| JP2009222055A (en) | Fuel pump | |
| JP2012031807A (en) | Fuel pump | |
| CN107201978B (en) | Fuel pump module | |
| JPWO2006115014A1 (en) | Fuel supply device | |
| JP5880979B2 (en) | Fuel pump module | |
| CN108884798B (en) | Fuel pump assembly | |
| JP2005527729A (en) | Connecting member for fuel pump | |
| WO2017163835A1 (en) | Fuel supply device | |
| JP4587129B2 (en) | Fuel pump and manufacturing method thereof. | |
| JP5248312B2 (en) | Fuel supply device | |
| KR102240468B1 (en) | Fuel pump | |
| JP2018150839A (en) | Fuel pump | |
| JP4961306B2 (en) | Electric pump device and fuel supply device using electric pump device | |
| CN109563797B (en) | Fuel pump assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211228 Address after: Ibaraki Patentee after: Hitachi astemo Co.,Ltd. Address before: Tokyo, Japan Patentee before: KEIHIN Corp. |