EP0308076A2 - Mounting arrangement - Google Patents
Mounting arrangement Download PDFInfo
- Publication number
- EP0308076A2 EP0308076A2 EP88307667A EP88307667A EP0308076A2 EP 0308076 A2 EP0308076 A2 EP 0308076A2 EP 88307667 A EP88307667 A EP 88307667A EP 88307667 A EP88307667 A EP 88307667A EP 0308076 A2 EP0308076 A2 EP 0308076A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel pump
- threaded portion
- abutment surface
- engine
- mounting
- 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.)
- Withdrawn
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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
- F02M37/06—Feeding by means of driven pumps mechanically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
Definitions
- This invention relates to a mounting arrangement for mounting a fuel pump or other device on an engine, and in particular a mounting arrangement for mounting a fuel pump having a plastics housing on an internal combustion engine.
- the conventional arrangement for mounting a fuel pump on an engine is by passing bolts through apertures in a flange or flanges on the fuel pump housing, and threadingly engaging the bolts in corresponding threaded apertures in the engine block.
- This conventional arrangement can have the disadvantages that due to extremes of temperature, the housing of the fuel pump can distort between the bolt fixings causing oil leakage; a machined pad with a high degree of flatness and surface finish is required on the engine to prevent oil leakage; and assembling the fuel pump to the engine requires careful torquing up of the bolts otherwise distortion of the flange(s) can occur, resulting in oil leakage.
- a mounting arrangement in accordance with the present invention for mounting a fuel pump or other device on an engine in which the fuel pump or other device comprises a housing and a drive shaft which can pass through an opening in a block of the engine for connecting with, and being actuable by, a rotary part of the engine comprises a cylindrical mounting boss mountable in the opening and having a guide section for guiding the drive shaft and a mounting section extending away from the block, the outer edge of the mounting section defining an outwardly facing surface for engaging a corresponding first abutment surface on the housing of the fuel pump or other device; a sealing ring positionable between the outwardly facing surface and the first abutment surface; a clamping ring having an internally threaded portion and an annular lip which extends inwardly, the clamping ring being rotatable relative to the cylindrical mounting boss; an annular flange defining a second abutment surface engagable by the annular lip; and an externally threaded portion for screw threaded
- the annular flange is on the cylindrical mounting boss and defines the outwardly facing surface as well as the second abutment surface, and the externally threaded portion is on the housing of the fuel pump or other device adjacent the first abutment surface.
- the annular flange is on the housing of the fuel pump or the other device and defines both the first and the second abutment surfaces, and the externally threaded portion is on the cylindrical mounting boss adjacent the outer edge.
- the sealing ring is preferably positioned in a groove in the first abutment surface.
- the cylindrical mounting boss is screw threaded in the opening in the block of the engine.
- the cylindrical mounting boss is a force fit in the opening in the block.
- a fuel pump 10 mounted and located on a block 12 of an engine 14 ( Figures 2 and 3).
- the engine 14 comprises an opening 16 extending from the outer surface 18 of the block 12 to a rotary part 20, such as a camshaft.
- the fuel pump 10 comprises a plastics housing 22, a drive shaft 24, springs 26,28, and spring retainer 30.
- the drive shaft 24 passes through the opening 16 and connects with the rotary part 20 for reciprocating movement, thereby actuating the fuel pump.
- the springs 26,28 and spring retainer 30 act with the reciprocating drive shaft 24 to control the actuation of the fuel pump 10 in the usual manner which is well known in the art.
- a part of the lower part of the plastics housing 22 has an externally threaded portion 32, which defines part of the mounting arrangement in accordance with the present invention.
- the opening 16 has an internally threaded section 34 adjacent the outer surface 18 of the block 12.
- a cylindrical mounting boss 36 is threaded into the internally threaded section 34 of the opening 16, and provides a guide section 38 for guiding the drive shaft 24 of the fuel pump 10 and a mounting section 40 extending away from the block 12 of the engine 14.
- the guide section 38 has oil passages 41 for the passage of oil from the engine 14 to provide lubrication for the drive shaft 24 of the fuel pump 10.
- the mounting section 40 has an annular flange 42 defining an outwardly facing surface 44 at its outer edge and an inwardly facing surface 46.
- the outwardly facing surface 44 of the annular flange 42 engages a corresponding abutment surface 48 (a first abutment surface) on the plastics housing 22.
- the externally threaded portion 32 is adjacent the first abutment surface 48.
- a sealing ring 50 is positioned in a groove 52 in the first abutment surface 48 to provide a substantially fluid tight seal between the fuel pump 10 and the cylindrical mounting boss 36, to substantially prevent leakage of oil.
- a clamping ring 54 is positioned to encircle the cylindrical mounting boss 40 and is rotatable relative thereto.
- the clamping ring 54 has an internally threaded portion 56 and an annular lip 58 which extends inwardly.
- the internally threaded portion 56 of the clamping ring 54 is screwed on to the externally threaded portion 32 of the fuel pump 10 until the annular lip 58 engages the inwardly facing surface 46 of the annular flange 44, the inwardly facing surface defining a second abutment surface.
- the fuel pump 10 is mounted and located on the engine 14 with the first abutment surface 48 engaging the outwardly facing surface 44 in the substantially fluid tight manner.
- FIG. 4 A second embodiment of a mounting arrangement in accordance with the present invention is shown in Figures 4 and 5.
- parts have been given the same reference numerals as like parts in the first embodiment of Figures 1 to 3.
- the fuel pump 10′ has an annular flange 60 which defines the first abutment surface 48 of the fuel pump and which also defines a second abutment surface 62 on the opposite side of the annular flange 60 to the first abutment surface 48.
- the mounting section 40′ of the cylindrical mounting boss 36′ has an outer edge 64 defining the outwardly facing surface 44 and an externally threaded portion 66 adjacent the outer edge.
- the cylindrical mounting boss 36′ is a force fit in the opening 16.
- the clamping ring 54 is rotatably mounted on the fuel pump 10′.
- the internally threaded portion 56 of the clamping ring 54 is screw fastened to the externally threaded portion 66 of the cylindrical mounting boss 36′ until the annular lip 58 of the clamping ring 54 engages the second abutment surface 62 on the annular flange 60.
- the fuel pump 10′ is mounted and located on the engine 14 with the sealing ring 50 forming a substantially fluid tight seal between the outwardly facing surface 44 and the first abutment surface 48.
- the use of a single clamping ring removes the need for a machined pad on the engine block, and also removes the need for careful torquing of the attachment bolts.
- the risk of distortion of the housing is also substantially removed.
- the present invention therefore provides a mounting arrangement which substantially removes the risk of oil leakage, and which can be assembled more quickly than previously known arrangements.
- the present invention also provides a mounting arrangement which is more suitable for fuel pumps having a plastics housing, and which overcomes the disadvantages associated with the arrangements shown in GB 2176238A and GB 1592355.
Abstract
Description
- This invention relates to a mounting arrangement for mounting a fuel pump or other device on an engine, and in particular a mounting arrangement for mounting a fuel pump having a plastics housing on an internal combustion engine.
- The conventional arrangement for mounting a fuel pump on an engine is by passing bolts through apertures in a flange or flanges on the fuel pump housing, and threadingly engaging the bolts in corresponding threaded apertures in the engine block. This conventional arrangement can have the disadvantages that due to extremes of temperature, the housing of the fuel pump can distort between the bolt fixings causing oil leakage; a machined pad with a high degree of flatness and surface finish is required on the engine to prevent oil leakage; and assembling the fuel pump to the engine requires careful torquing up of the bolts otherwise distortion of the flange(s) can occur, resulting in oil leakage. These problems are heightened with the use of a fuel pump having a housing of plastics material.
- Other arrangements are also known, such as using an annular member which is bolted to the engine with the body of the fuel pump secured to the annular member by a clamping band, as shown in GB patent application no. 2176238A, and such as using an adjustable clamping ring as shown in GB patent no. 1592355. The arrangement disclosed in GB 2176238A has the disadvantages that it is prone to oil leakage, is expensive, is difficult to service, and is not susceptible to easy assembly. The arrangement shown in GB 1592355 has the disadvantages that it is expensive, complex, and requires a large amount of space.
- It is an object of the present invention to provide an improvement to the above mentioned known arrangements.
- To this end, a mounting arrangement in accordance with the present invention for mounting a fuel pump or other device on an engine in which the fuel pump or other device comprises a housing and a drive shaft which can pass through an opening in a block of the engine for connecting with, and being actuable by, a rotary part of the engine, comprises a cylindrical mounting boss mountable in the opening and having a guide section for guiding the drive shaft and a mounting section extending away from the block, the outer edge of the mounting section defining an outwardly facing surface for engaging a corresponding first abutment surface on the housing of the fuel pump or other device; a sealing ring positionable between the outwardly facing surface and the first abutment surface; a clamping ring having an internally threaded portion and an annular lip which extends inwardly, the clamping ring being rotatable relative to the cylindrical mounting boss; an annular flange defining a second abutment surface engagable by the annular lip; and an externally threaded portion for screw threaded engagement by the internally threaded portion of the clamping ring; the arrangement being such that, on screw threading the internally threaded portion of the clamping ring to the externally threaded portion until the annular lip engages the second abutment surface, the first abutment surface engages the outwardly facing surface with the sealing ring therebetween to form a substantially fluid tight seal therebetween, and the fuel pump or other device is mounted on the engine.
- Preferably, the annular flange is on the cylindrical mounting boss and defines the outwardly facing surface as well as the second abutment surface, and the externally threaded portion is on the housing of the fuel pump or other device adjacent the first abutment surface. Alternatively the annular flange is on the housing of the fuel pump or the other device and defines both the first and the second abutment surfaces, and the externally threaded portion is on the cylindrical mounting boss adjacent the outer edge.
- The sealing ring is preferably positioned in a groove in the first abutment surface.
- Preferably the cylindrical mounting boss is screw threaded in the opening in the block of the engine. Alternatively, the cylindrical mounting boss is a force fit in the opening in the block.
- The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:-
- Figure 1 is an exploded view of a first embodiment of a mounting arrangement in accordance with the present invention;
- Figure 2 is a partial cross-section of the mounting arrangement shown in Figure 1;
- Figure 3 is a larger cross-section of the mounting arrangement shown in Figure 1, showing details of the operation of the fuel pump;
- Figure 4 is an exploded view of a second embodiment of a mounting arrangement in accordance with the present invention; and
- Figure 5 is a partial cross-section of the mounting arrangement shown in Figure 4.
- Referring to Figures 1 to 3, there is shown a
fuel pump 10 mounted and located on ablock 12 of an engine 14 (Figures 2 and 3). Theengine 14 comprises an opening 16 extending from theouter surface 18 of theblock 12 to arotary part 20, such as a camshaft. Thefuel pump 10 comprises a plastics housing 22, adrive shaft 24,springs spring retainer 30. When thefuel pump 10 is mounted in position (Figure 3) thedrive shaft 24 passes through theopening 16 and connects with therotary part 20 for reciprocating movement, thereby actuating the fuel pump. Thesprings spring retainer 30 act with the reciprocatingdrive shaft 24 to control the actuation of thefuel pump 10 in the usual manner which is well known in the art. In the arrangement shown in Figures 1 to 3, a part of the lower part of theplastics housing 22 has an externally threadedportion 32, which defines part of the mounting arrangement in accordance with the present invention. - The
opening 16 has an internally threadedsection 34 adjacent theouter surface 18 of theblock 12. Acylindrical mounting boss 36 is threaded into the internally threadedsection 34 of theopening 16, and provides aguide section 38 for guiding thedrive shaft 24 of thefuel pump 10 and amounting section 40 extending away from theblock 12 of theengine 14. Theguide section 38 hasoil passages 41 for the passage of oil from theengine 14 to provide lubrication for thedrive shaft 24 of thefuel pump 10. Themounting section 40 has anannular flange 42 defining an outwardly facingsurface 44 at its outer edge and an inwardly facingsurface 46. When thefuel pump 10 is mounted in position, the outwardly facingsurface 44 of theannular flange 42 engages a corresponding abutment surface 48 (a first abutment surface) on the plastics housing 22. The externally threadedportion 32 is adjacent thefirst abutment surface 48. Asealing ring 50 is positioned in agroove 52 in thefirst abutment surface 48 to provide a substantially fluid tight seal between thefuel pump 10 and thecylindrical mounting boss 36, to substantially prevent leakage of oil. - A
clamping ring 54 is positioned to encircle thecylindrical mounting boss 40 and is rotatable relative thereto. Theclamping ring 54 has an internally threadedportion 56 and anannular lip 58 which extends inwardly. In use, the internally threadedportion 56 of theclamping ring 54 is screwed on to the externally threadedportion 32 of thefuel pump 10 until theannular lip 58 engages the inwardly facingsurface 46 of theannular flange 44, the inwardly facing surface defining a second abutment surface. In this position, thefuel pump 10 is mounted and located on theengine 14 with thefirst abutment surface 48 engaging the outwardly facingsurface 44 in the substantially fluid tight manner. - A second embodiment of a mounting arrangement in accordance with the present invention is shown in Figures 4 and 5. In this second embodiment, parts have been given the same reference numerals as like parts in the first embodiment of Figures 1 to 3.
- In this second embodiment, the
fuel pump 10′ has anannular flange 60 which defines thefirst abutment surface 48 of the fuel pump and which also defines asecond abutment surface 62 on the opposite side of theannular flange 60 to thefirst abutment surface 48. Themounting section 40′ of thecylindrical mounting boss 36′ has anouter edge 64 defining the outwardly facingsurface 44 and an externally threadedportion 66 adjacent the outer edge. Thecylindrical mounting boss 36′ is a force fit in theopening 16. - In this arrangement, the
clamping ring 54 is rotatably mounted on thefuel pump 10′. In use, the internally threadedportion 56 of theclamping ring 54 is screw fastened to the externally threadedportion 66 of thecylindrical mounting boss 36′ until theannular lip 58 of theclamping ring 54 engages thesecond abutment surface 62 on theannular flange 60. In this position, thefuel pump 10′ is mounted and located on theengine 14 with the sealingring 50 forming a substantially fluid tight seal between the outwardly facingsurface 44 and thefirst abutment surface 48. - In both of the above mounting arrangements in accordance with the present invention, the use of a single clamping ring removes the need for a machined pad on the engine block, and also removes the need for careful torquing of the attachment bolts. The risk of distortion of the housing is also substantially removed. The present invention therefore provides a mounting arrangement which substantially removes the risk of oil leakage, and which can be assembled more quickly than previously known arrangements. The present invention also provides a mounting arrangement which is more suitable for fuel pumps having a plastics housing, and which overcomes the disadvantages associated with the arrangements shown in GB 2176238A and GB 1592355.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8721931 | 1987-09-17 | ||
GB8721931A GB2210109A (en) | 1987-09-17 | 1987-09-17 | Pump mounting |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0308076A2 true EP0308076A2 (en) | 1989-03-22 |
EP0308076A3 EP0308076A3 (en) | 1989-10-18 |
Family
ID=10623966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88307667A Withdrawn EP0308076A3 (en) | 1987-09-17 | 1988-08-18 | Mounting arrangement |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0308076A3 (en) |
GB (1) | GB2210109A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1279808A2 (en) * | 2001-07-26 | 2003-01-29 | PIAGGIO & C. S.p.A. | Mechanism for actuating auxiliary device of internal combustion engines |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1949470A (en) * | 1929-10-24 | 1934-03-06 | Hesselman Knut Jonas Elias | Internal combustion engine |
US2904027A (en) * | 1957-12-13 | 1959-09-15 | Gen Motors Corp | Fuel supply system |
GB1592355A (en) * | 1976-11-19 | 1981-07-08 | Lucas Industries Ltd | Mounting device |
EP0118681A1 (en) * | 1983-02-11 | 1984-09-19 | Mannesmann Kienzle GmbH | Arrangement of an additional pump feeding an additional circuit in the operating system of a diesel engine |
GB2176238A (en) * | 1985-06-06 | 1986-12-17 | Lucas Ind Plc | Mounting arrangement |
-
1987
- 1987-09-17 GB GB8721931A patent/GB2210109A/en not_active Withdrawn
-
1988
- 1988-08-18 EP EP88307667A patent/EP0308076A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1949470A (en) * | 1929-10-24 | 1934-03-06 | Hesselman Knut Jonas Elias | Internal combustion engine |
US2904027A (en) * | 1957-12-13 | 1959-09-15 | Gen Motors Corp | Fuel supply system |
GB1592355A (en) * | 1976-11-19 | 1981-07-08 | Lucas Industries Ltd | Mounting device |
EP0118681A1 (en) * | 1983-02-11 | 1984-09-19 | Mannesmann Kienzle GmbH | Arrangement of an additional pump feeding an additional circuit in the operating system of a diesel engine |
GB2176238A (en) * | 1985-06-06 | 1986-12-17 | Lucas Ind Plc | Mounting arrangement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1279808A2 (en) * | 2001-07-26 | 2003-01-29 | PIAGGIO & C. S.p.A. | Mechanism for actuating auxiliary device of internal combustion engines |
EP1279808A3 (en) * | 2001-07-26 | 2003-08-13 | PIAGGIO & C. S.p.A. | Mechanism for actuating auxiliary device of internal combustion engines |
Also Published As
Publication number | Publication date |
---|---|
EP0308076A3 (en) | 1989-10-18 |
GB8721931D0 (en) | 1987-10-21 |
GB2210109A (en) | 1989-06-01 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19891120 |
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17Q | First examination report despatched |
Effective date: 19900828 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19910108 |