EP2603690A1 - Geräuschoptimierte hochdruckpumpe - Google Patents
Geräuschoptimierte hochdruckpumpeInfo
- Publication number
- EP2603690A1 EP2603690A1 EP11733854.1A EP11733854A EP2603690A1 EP 2603690 A1 EP2603690 A1 EP 2603690A1 EP 11733854 A EP11733854 A EP 11733854A EP 2603690 A1 EP2603690 A1 EP 2603690A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- compensation device
- pressure pump
- spring plate
- spring
- 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
- 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
- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/445—Selection of particular materials
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/09—Fuel-injection apparatus having means for reducing noise
Definitions
- the invention relates to a high-pressure pump of a fuel injection system of an internal combustion engine, comprising a pump housing in which a pump camshaft is rotatably mounted, which interacts with a pump piston foot of a pump piston via a roller tappet arranged in a tappet body and engaging an inner flange of the tappet body the pump housing arranged and from a pump cylinder head to form a pump working space covered pump cylinder is movable up and down, opposite to the roller tappet a spring plate on the inner flange the pump base includes rests and between the spring plate and the pump cylinder head, a pump spring is arranged.
- Such a high pressure pump of a fuel injection system is known from DE 10 2008 040 083 AI.
- This high-pressure pump is particularly compact, which is achieved by integrating a suction valve and a check valve in the pump cylinder head of this high-pressure pump.
- a suction valve is required in such a high-pressure pump, so that the supplied from a pre-pressure pump from a fuel tank via a filter device and a metering unit to the pump working chamber fuel in a pumping movement of the pump piston does not return to the low pressure region.
- the check valve is necessary so that the fuel pumped by the pump piston during a delivery movement into a high-pressure accumulator does not pass back into the pump working space during a filling movement of the pump piston.
- the invention is based on the object to improve the noise immission behavior of a generic high pressure pump.
- the game is caused by the interaction of the roller shoe and the spring plate with the inner ring flange of the plunger body.
- a slight play should be present, so that at least the main part of the pump spring force is introduced via the spring plate in the plunger body.
- the plunger body is prevented from a (torsion) rotation by the existing pump spring torsion.
- the lash adjuster between the spring plate and the pump piston foot is arranged to surround the pump piston in this area. This is the preferred embodiment, since thereby the delivery behavior of the high pressure pump is not affected.
- the lash adjuster is a lash adjuster.
- Such a disc is easy and inexpensive to manufacture and easy to install during assembly of the high-pressure pump.
- the lash adjuster is designed to be elastic.
- An elastic training can be achieved by the material properties of the lash adjuster or by the shape of the lash adjuster by being designed as a plate spring or as a spring washer.
- the clearance compensation device is made of a plastic material.
- a plastic material Corresponding pressure-resistant and kraftst off resistant plastic materials are available.
- the lash adjuster can also be made of a metallic material. A metallic material is particularly suitable for a design of the lash adjuster device as a plate spring or as a spring washer.
- An alternative embodiment of the production of the clearance compensation device as a separate component this can also be formed integrally with the pump piston foot or the spring plate or the roller shoe. This can be done for example by changing the dimensioning of the components involved. For example, the support thickness of the spring plate in the inner ring flange of the plunger body can be reduced or the piston foot thickness can be increased. Furthermore, the roller shoe can be manufactured with a frontally offset increase or support. A further preferred embodiment provides to form the lash adjuster by a cranked spring plate. Further advantageous embodiments of the invention are described in the drawings, are described in the embodiments illustrated in the figures of the invention.
- FIG. 1 is a sectional view of a high pressure pump
- FIG. 2 shows a schematic detail view from FIG. 1 with an elastic clearance compensation device
- FIG. 3 shows a roller tappet with a play compensation device in the form of a
- Figure 4 shows a roller tappet with a lash adjuster in the form of a
- FIG. 5 shows a roller tappet with a cranked spring plate and a clearance compensation device in the form of a spring washer and
- Figure 6 shows a roller tappet with a plane spring plate and a clearance compensation device in the form of a spring washer.
- the high pressure pump shown in Figure 1 is designed in particular for a common rail injection system of an internal combustion engine.
- the high-pressure pump has a pump housing 1, in which a pump camshaft 2 is rotatably mounted.
- the pump camshaft 2 has two cams 3, which, in cooperation with a roller tappet 4 and a pump piston 5, effect an up and down movement of the pump piston 5.
- the pump piston 5 cooperates with a pump working chamber 6, in which a suction valve fuel from a Fuel tank is supplied and is compressed by the pump piston 5 and is conveyed via a check valve in a high-pressure accumulator.
- the pump working chamber 6 is embedded in a pump cylinder head 7 of the high pressure pump, wherein the pump cylinder head 7 is further formed integrally with a pump cylinder 8.
- the pump cylinder 8 projects into a recess 9 of the pump housing 1 and is aligned with the center axis of the pump camshaft 2.
- the roller tappet 4 has a tappet body 10, which is guided on the pump cylinder 8 and against rotation by means of a rotation 11 is secured against rotation. Furthermore, the plunger body 10 has a pump camshaft side recess into which a roller shoe 12 is inserted. The roller shoe 12 has a cylindrical recess 13 into which a roller 14 is inserted captively. The roller 14 runs at a rotational movement of the pump camshaft 2 on the cam track and thus transmits the rotational movement of the camshaft 2 in a translational movement of the pump piston 5.
- the pump piston 5 has a Pumpenkolbenfuß 15, which cooperates with the roller shoe 12.
- a spring plate 16 is disposed above the piston foot 15, which rests on an inner ring flange 18 of the plunger body 10.
- a pump spring 17 shown in Figure 2 is supported, which interacts with the pump cylinder 8 or the pump cylinder head 7 opposite.
- the height of the inner ring flange 18 is slightly higher than the height of the piston foot 15, so that between the piston foot 15 and the roller shoe 12 or the spring plate 16 remains a small game that is compensated by a lash adjuster according to the invention.
- the play compensation device is an elastic or non-elastic play compensation disc 19, which is arranged between the pump piston foot 15 and the spring plate 16.
- the clearance compensation disc 19 is made of wear-resistant plastic, for example.
- the play compensation disc 19 by coating on one side of the spring plate 16 - namely pumpenkolbenfuß formula - be applied.
- An elastic design of the play compensation disc 19 has the advantage that during operation of the high pressure pump by the prevailing forces the described game is automatically reduced to zero.
- the lash adjuster is formed by a cranked spring plate 16a.
- the crank is also sized so that the described game is reduced to zero. It is also conceivable to make the spring plate 16a elastic in the region of the crank.
- the lash adjuster is designed as a clearance compensating disk 19a, which is arranged below the pump piston foot 15.
- the play compensation disc 19a is either made in one piece with the roller shoe 12, or fastened or fixed thereto in a suitable manner.
- the backlash compensation device is designed as a spring washer 20, which interacts with the pump piston foot 15 and a spring plate 16a that is bent inversely with respect to the exemplary embodiment according to FIG.
- the reverse cranked spring plate 16a is used to provide sufficient space for the spring washer 20.
- the necessary installation space for accommodating the spring washer 20 is created by increasing the overall height of the inner ring flange 18a.
- the spring plate 16 is accordingly plan or flat.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010039113A DE102010039113A1 (de) | 2010-08-10 | 2010-08-10 | Geräuschoptimierte Hochdruckpumpe |
| PCT/EP2011/062301 WO2012019881A1 (de) | 2010-08-10 | 2011-07-19 | Geräuschoptimierte hochdruckpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2603690A1 true EP2603690A1 (de) | 2013-06-19 |
| EP2603690B1 EP2603690B1 (de) | 2017-09-27 |
Family
ID=44628725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11733854.1A Active EP2603690B1 (de) | 2010-08-10 | 2011-07-19 | Geräuschoptimierte hochdruckpumpe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2603690B1 (de) |
| DE (1) | DE102010039113A1 (de) |
| WO (1) | WO2012019881A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014208571A1 (de) * | 2014-05-07 | 2015-11-12 | Robert Bosch Gmbh | Kraftstoffpumpe mit akustischer Trennung |
| WO2016105355A1 (en) * | 2014-12-23 | 2016-06-30 | Cummins Inc. | Tappet roller retaining approach |
| GB201506173D0 (en) * | 2015-04-13 | 2015-05-27 | Delphi Internat Operations Luxembourg S � R L | Fuel pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10344459B4 (de) * | 2003-09-25 | 2012-06-14 | Robert Bosch Gmbh | Kolbenpumpe, insbesondere Hochdruck-Kolbenpumpe |
| JP4467469B2 (ja) * | 2005-06-08 | 2010-05-26 | ボッシュ株式会社 | 燃料供給用ポンプ及びタペット構造体 |
| DE102008040083A1 (de) | 2008-07-02 | 2010-01-07 | Robert Bosch Gmbh | Hochdruckpumpe |
-
2010
- 2010-08-10 DE DE102010039113A patent/DE102010039113A1/de not_active Withdrawn
-
2011
- 2011-07-19 WO PCT/EP2011/062301 patent/WO2012019881A1/de not_active Ceased
- 2011-07-19 EP EP11733854.1A patent/EP2603690B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2603690B1 (de) | 2017-09-27 |
| WO2012019881A1 (de) | 2012-02-16 |
| DE102010039113A1 (de) | 2012-02-16 |
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