EP2729692A1 - Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensemble - Google Patents
Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensembleInfo
- Publication number
- EP2729692A1 EP2729692A1 EP12731563.8A EP12731563A EP2729692A1 EP 2729692 A1 EP2729692 A1 EP 2729692A1 EP 12731563 A EP12731563 A EP 12731563A EP 2729692 A1 EP2729692 A1 EP 2729692A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pump
- assembly
- engine
- frame
- 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- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 10
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 8
- 239000001569 carbon dioxide Substances 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—Pistons
-
- 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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2307/00—Preventing the rotation of tappets
Definitions
- the invention relates to an assembly of a combustion engine and a pump. It relates to a vehicle comprising such an assembly.
- the exhaust gases contain carbon dioxide, denoted by its chemical formula C0 2 , which is harmful for humans. It is desirable to reduce carbon dioxide emissions.
- the invention provides an assembly of a combustion engine and a pump such that the engine comprises a housing, and the pump comprises a frame defining a fluid compression chamber, fixed on the engine.
- the pump further comprises a piston adapted to compress fluid present in the compression chamber, the piston being guided in translation in a conduit formed in the engine.
- the duct is of rectangular section and the piston is integral with two rollers cooperating with two separate walls of the conduit for guiding the piston in the conduit.
- the assembly comprises a cam, fixed to a motor shaft adapted to drive the piston in translation.
- the assembly comprises a spring formed between the frame and the end of the piston opposite the frame, the spring pushing the end of the piston opposite the frame towards the cam.
- a cage is attached to the end of the piston opposite to the frame.
- the cage has orifices for the circulation of oil.
- the cage is provided with a motion transmission interface, the interface being in contact with the cam.
- the cam is rotated by one of the camshaft and the crankshaft, by means of a belt where appropriate.
- the engine is a diesel engine.
- a motor vehicle comprising an assembly as previously described, the pump being a fuel compression pump arranged on a fuel intake circuit of the engine.
- FIG. 3 a view of an exemplary assembly according to the invention.
- FIG. 4 a perspective view of an example of a cage
- FIG. 7 a view of an exemplary assembly according to the invention.
- the proposed invention is part of the development of a new vehicle engine architecture, including diesel engine.
- the engine may in particular be an engine having any number of cylinders.
- such an engine can be direct attack.
- Figure 1 provides a schematic sectional view of this architecture. More specifically, Figure 1 shows an assembly 1 0 of a combustion engine 12 and a pump 14.
- the assembly 1 0 is part of the powertrain of the vehicle.
- the pump 14 is a so-called high pressure pump.
- the pump 14 high pressure can compress fluid.
- the fluid is diesel fuel.
- the motor 1 2 comprises different members that are not shown in Figure 1.
- the motor 1 2 comprises a casing 1 6.
- the casing 1 6 serves as a protective envelope to the motor 1 2 members.
- the pump 14 comprises a frame 1 8 delimiting a compression chamber 20.
- the chamber 20 serves to compress the diesel fuel.
- the frame 1 8 is fixed on the casing 1 6.
- the fixing on the casing 1 6 is made by means of screws passing through the passages 22 of screws. These passages 22 are holes for mounting the frame 18 on the housing 1 6.
- the precision of the assembly can be facilitated by the presence of a shoulder 24 for easy centering of the pump 14 relative to the bore 25 provided in the casing 1 6 to place the frame 18.
- Integrate the compression chamber 20 on the motor 1 2 allows to gain mass for the assembly 1 0 of the motor and the pump. This advantage is obtained by comparison with an engine architecture in which the pump is a device outside the engine provided with a chamber and a frame. This configuration has the same advantage over the case where the engine is equipped with a pump attached to the cylinder head and driven by a belt. A reduction in mass at the assembly 1 0 of the motor and the pump leads to an even greater decrease in the mass of the vehicle. The reduction in mass of the whole results in a decrease in the carbon dioxide emission. Integrate the compression chamber 20 on the engine 12 also saves in terms of size compared to an engine architecture in which the pump is a device outside the engine with a chamber and a frame.
- the pump 14 comprises a piston 26 adapted to compress fluid present in the chamber 20 of compression. The piston 26 is guided in translation in a conduit 28 formed in the housing.
- the piston 26 of the pump 14 is however not guided in the lower part. It is desirable to provide such a guiding function. For this, several elements are to be taken into consideration: the mechanical stress recoveries, the high frequency of the piston displacements, the maintenance of the contact between the cam 40 presented with reference to FIG. 3 and the roller 58 (also referred to as English "roller") pump 14, the guarantee of durability and robustness of the various elements of the pump, the control of orientation and control of wear.
- FIG. 2 represents a view from above of the casing 16 with a cylindrical guide. According to this example, the indexing is carried out by means of a groove 68 made in the motor 16.
- the principle of the present invention is to remove the cylindrical guide of the piston 26 of the injection pump and to make a rectangular guide with two facing rollers which guide the piston 26 through the room. This technique would indeed to ensure the circulation of the lubricating fluid around the piston 26 by avoiding retention of the fluid, to gain space and time and quality of assembly.
- conduit 28 in the casing 1 6 which is of rectangular section. Rectangular section for which a different length and width can be defined rather than a square is preferred here.
- FIGS 3 and 7 are views of an example of assembly 10 according to the invention in different orientations.
- the piston 26 is secured to two rollers 32 and 34 (see also Figure 6 described below). Only the roller 32 is visible in Figure 3, the roller 34 facing him being masked. These two rollers 32 and 34 respectively cooperate with two separate walls 36 and 38 of the duct 28. This cooperation makes it possible to guide the piston 26 in the duct 28.
- the assembly 10 further comprises a cam 40.
- the cam 40 is adapted to drive the piston 28 in translation.
- the cam has three lobes 42.
- the circular arrow 44 indicates the direction of rotation of the cam 40 about the axis 46. Seen in the direction of the direction A shown in Figure 3, the direction of rotation shown by the arrow 44 corresponds to a direction of rotation anticlockwise about the axis 46.
- the axis 46 may correspond to a shaft of the motor 12, the shaft to which the cam 40 is secured.
- the cam 40 is rotated by one of the camshaft and the crankshaft, by means of a belt as appropriate.
- the assembly 10 comprises a spring 60 formed between the frame 18 and the end of the piston 26 opposite the frame 18.
- the spring 60 pushes the end of the piston 26 opposite the frame 18 to the cam 40.
- the spring 60 thus has a role of return spring.
- the combination of a duct 28 of rectangular section and two rollers 32 and 34 allows for a guide of the piston 26.
- the rectangular shape with respect to a square shape provides a natural keying since each side can be identified because of differences in length and width. This results in a natural and accurate indexing of the desired position for the pump 14. This indexing facilitates the alignment of the parts for the operator to assembly. This results in a simplified assembly. Therefore, a saving of time can be obtained. This gain concerns both the installation of new engines by an operator and aftermarket repair operations.
- the rectangular shape of the guide and the presence of the two rollers allow the recovery of the forces exerted by the lobes 42 of cam 40, at a high frequency, for example of the order of 125 Hz.
- the presence of the two rollers 32 and 34 ensures a linear contact between the piston 28 and the two rollers 32 and 34 with respect to the cylindrical guide wherein the contact is only punctual. This results in a reduction of the friction related to the connection rolling / guiding and an increase in durability due to the decrease in the generated wear. In other words, the friction and wear are maintained at the lowest level, while ensuring the recovery of effort. This makes it possible to reduce the mechanical losses by friction and therefore the emission of carbon dioxide by the vehicle.
- the cage 48 may also be provided with a motion transmission interface 58, the interface 58 being in contact with the cam 40.
- the interface 58 is a transmitting roller. the movement of the cam 40.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1156195A FR2977640B1 (fr) | 2011-07-08 | 2011-07-08 | Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensemble |
| PCT/FR2012/051322 WO2013007905A1 (fr) | 2011-07-08 | 2012-06-13 | Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2729692A1 true EP2729692A1 (fr) | 2014-05-14 |
Family
ID=46456882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12731563.8A Withdrawn EP2729692A1 (fr) | 2011-07-08 | 2012-06-13 | Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensemble |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2729692A1 (fr) |
| FR (1) | FR2977640B1 (fr) |
| WO (1) | WO2013007905A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1156195A (fr) | 1956-08-30 | 1958-05-13 | Perfectionnements aux pulvérisateurs agricoles | |
| US3139076A (en) | 1961-08-21 | 1964-06-30 | Victor M Flaherty | Non-rotating tappet arrangement |
| JPH02173358A (ja) | 1988-12-26 | 1990-07-04 | Hitachi Ltd | エンジン制御装置 |
| DE102006012458A1 (de) * | 2006-03-17 | 2007-09-20 | Robert Bosch Gmbh | Rollenstößel für ein Pumpenelement einer Kraftstoffhochdruckpumpe |
| JP2008291764A (ja) | 2007-05-25 | 2008-12-04 | Toyota Motor Corp | 高圧燃料ポンプ |
| DE102009000488A1 (de) * | 2009-01-29 | 2010-08-05 | Robert Bosch Gmbh | Radialkolbenpumpe |
-
2011
- 2011-07-08 FR FR1156195A patent/FR2977640B1/fr active Active
-
2012
- 2012-06-13 WO PCT/FR2012/051322 patent/WO2013007905A1/fr not_active Ceased
- 2012-06-13 EP EP12731563.8A patent/EP2729692A1/fr not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2013007905A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013007905A1 (fr) | 2013-01-17 |
| FR2977640B1 (fr) | 2013-08-30 |
| FR2977640A1 (fr) | 2013-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20140121 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: AZOU, YVON Inventor name: CAUSSE, MICKAEL |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PEUGEOT CITROEN AUTOMOBILES SA |
|
| INTG | Intention to grant announced |
Effective date: 20170404 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PSA AUTOMOBILES SA |
|
| 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: 20170815 |