EP2625417A1 - Kraftstoffhochdruckpumpe - Google Patents
KraftstoffhochdruckpumpeInfo
- Publication number
- EP2625417A1 EP2625417A1 EP11752528.7A EP11752528A EP2625417A1 EP 2625417 A1 EP2625417 A1 EP 2625417A1 EP 11752528 A EP11752528 A EP 11752528A EP 2625417 A1 EP2625417 A1 EP 2625417A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pressure fuel
- metallic coating
- housing part
- plastic
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- 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
- F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
- F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
-
- 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
Definitions
- the invention relates to a high-pressure fuel pump of an internal combustion engine with the features of the preamble of claim 1. Furthermore, the invention relates to the use of a nanocrystalline metallic coating to increase the strength and / or temperature resistance of a housing part of a high-pressure fuel pump.
- High-pressure fuel pumps for example in the form of a radial piston pump, are well known from the prior art. They are used in fuel injection systems of motor vehicles to promote fuel, preferably diesel fuel, to high pressure.
- a high-pressure fuel pump at least one pump element, which is accommodated in a pump housing.
- a drive shaft with a cam or eccentric drive is also accommodated in the pump housing.
- the pump housing or at least parts of the pump housing made of steel or aluminum.
- Object of the present invention is to provide a high-pressure fuel pump of the type mentioned, which is optimized in terms of weight and cost.
- a high-pressure fuel pump with the features of claim 1 is proposed.
- Advantageous developments of the invention are specified in the subclaims.
- the use of a nanocrystalline metallic coating for increasing the strength and / or the temperature resistance of a housing part of a high-pressure fuel pump according to claim 6 is proposed.
- the proposed fuel return pump has a pump housing for receiving at least one pump element and a drive shaft for actuating the at least one pump element.
- the pump housing comprises at least one housing part made of plastic.
- the housing part made of a plastic at least in the region of a mechanically and / or thermally highly stressed point, has a nanocrystalline metallic coating which increases the strength and / or the temperature resistance.
- the nanocrystalline metallic coating is capable of replacing an additional metallic component used for reinforcement, such as a metal sleeve.
- the coating creates a composite component consisting of a plastic base body and a metallic coating which combines the advantages of the materials plastic and metal. Because the plastic allows the use of a cost-effective injection molding process, by means of which also very complex shapes can be produced.
- the base body is therefore preferably an injection-molded part.
- the use of plastic also allows a reduction in weight.
- the advantages of the material metal are manifested in a significantly increased strength and temperature resistance of the component, at least in the area of the coating. Due to the nanocrystalline structure of the metallic coating are a good
- the plastic is preferably a thermoplastic insert.
- the plastic can also be reinforced by a fiber content. Glass fibers or carbon fibers are particularly suitable as reinforcing fibers.
- the housing part made of a plastic comprises a bore for fluid guidance and / or for receiving a liftable plunger, by means of which a pump piston of a pump element can be supported on the drive shaft: the bore has at least in a partial area a strength and / or the temperature resistance increasing nanocrystalline metallic coating.
- the housing part may be, for example, a low-pressure housing of a high-pressure pump and the bore may be a plunger bore. By the lifting movement of the plunger, the bore is subjected to friction. This is accompanied by high temperatures.
- the nanocrystalline metallic coating increases the strength in the area of the bore and thus counteracts premature wear of the housing part. At the same time, the temperature resistance of the housing part is increased in the bore.
- fluid-carrying bores of the housing part may also be provided with a corresponding coating.
- the nanocrystalline metallic coating contains iron, nickel and / or titanium.
- the abovementioned metals may be present in pure form or as an alloy, if appropriate using a further metal.
- metals such as aluminum, copper, cobalt, molybdenum,
- the nanocrystalline metallic coating preferably has a layer thickness between 10 and 500 ⁇ m, preferably between 20 and 250 ⁇ m, more preferably between 25 and 200 ⁇ m. Such layer thicknesses already suffice to achieve the desired effect of increased strength and / or temperature resistance.
- the nanocrystals of the nanocrystalline metallic coating furthermore preferably have a particle size between 2 nm and 1000 nm, preferably between 10 nm and 500 nm, more preferably between 15 nm and 100 nm.
- the housing part is a plastic injection molded part made of a thermoplastic material and the coating is applied in a layer thickness between 25 and 200 ⁇ .
- a plastic-metal composite body can be produced, which combines the advantages of the materials plastic and metal in itself.
- the plastic-metal composite body has a low weight and - at least at the provided with a nanocrystalline metallic coating sites - high strength and temperature resistance.
- the plastic base body is inexpensive to produce by injection molding. Injection molding also allows the formation of complex shapes.
- the coating is preferably applied only partially, namely only at the locations which are subjected to high mechanical stresses and / or high thermal stresses.
- FIG. 1 and 2 are perspective views of a plastic injection molding
- FIG. 3 shows a section through the plastic injection-molded housing of FIGS. 1 and 2. Detailed description of the drawings
- FIGS. 1 and 2 show a housing part 2 of a pump housing 1 of a high-pressure fuel pump with a multiplicity of
- the holes serve primarily the fluid management or the inclusion of fasteners.
- bores 5 are provided which each serve to receive and guide a liftable plunger of a pump element (not shown). Due to the lifting movement of the plunger during operation of the high-pressure fuel pump, the holes 5 are subjected to friction. This is accompanied by a temperature increase, which represents an additional load on the housing part 2 in the region of the bore 5. At least at the holes 5 are thus mechanical and thermally highly stressed points 3. As a rule, therefore, such housing parts 2 are made of steel or aluminum as a material. In order to save weight and costs, however, the housing part 2 illustrated in FIGS. 1 and 2 is a plastic injection-molded part which is provided with a nanocrystalline metallic coating 4 in the region of the bores 5 in order to increase the strength and the temperature resistance (see also Fig. 3).
- the formation of the main body of the housing part 2 as a plastic injection-molded part reduces the weight of the housing part 2 and simplifies the realization of complex shapes.
- the plastic injection-molded part at least in the region of the holes 5 due to the nanocrystalline metallic coating 4 sufficient strength and temperature resistance.
- a selective, that is to say partial, coating of the housing part 2 is already sufficient only in the area of the mechanically and / or thermally highly stressed areas 3. This can further reduce the production costs.
- a mechanically and / or thermally highly stressed points 3 come next to the holes 5 for receiving the plunger of the pump elements further holes for fluid management or for receiving fasteners in question.
- the housing part 2 can also be a flange component, by means of which the
- High-pressure fuel pump to a motor housing or the like fastened is.
- Heavily stressed points 3 of such a flange component represent, for example, the flange, parts of the inner surface or specific connection points.
- a nanocrystalline metallic coating can therefore be limited to these points 3.
- the entire flange component may also be provided with a nanocrystalline metallic coating.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010041425 DE102010041425A1 (de) | 2010-09-27 | 2010-09-27 | Kraftstoffhochdruckpumpe |
PCT/EP2011/065074 WO2012041627A1 (de) | 2010-09-27 | 2011-09-01 | Kraftstoffhochdruckpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2625417A1 true EP2625417A1 (de) | 2013-08-14 |
EP2625417B1 EP2625417B1 (de) | 2015-01-07 |
Family
ID=44583005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11752528.7A Not-in-force EP2625417B1 (de) | 2010-09-27 | 2011-09-01 | Kraftstoffhochdruckpumpe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2625417B1 (de) |
CN (1) | CN103119284B (de) |
DE (1) | DE102010041425A1 (de) |
WO (1) | WO2012041627A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014225794A1 (de) * | 2014-12-15 | 2016-06-16 | Robert Bosch Gmbh | Hochdruckpumpe sowie Verfahren zur Herstellung einer Hochdruckpumpe |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543355Y2 (de) * | 1989-01-13 | 1993-11-01 | ||
DE10322599B4 (de) * | 2003-05-20 | 2013-08-08 | Robert Bosch Gmbh | Kolbenpumpe, insbesondere Hochdruck-Kraftstoffpumpe |
DE102006006555B4 (de) * | 2006-02-13 | 2008-03-06 | Siemens Ag | Hochdruckpumpe |
DE102006041673A1 (de) * | 2006-02-20 | 2007-08-23 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
DE102006017449A1 (de) * | 2006-04-13 | 2007-10-18 | Robert Bosch Gmbh | Kraftstoffinjektor mit hoher Lebensdauer und Verschleißfestigkeit |
DE102007044499A1 (de) * | 2007-09-18 | 2009-03-19 | Robert Bosch Gmbh | Kraftstoffpumpe, insbesondere für ein Kraftstoffsystem einer Kolben-Brennkraftmaschine |
DE102008001960A1 (de) * | 2008-05-26 | 2009-12-03 | Robert Bosch Gmbh | Pumpe, insbesondere Kraftstoffhochdruckpumpe |
DE102008040351A1 (de) * | 2008-07-11 | 2010-01-14 | Robert Bosch Gmbh | Hochdruckpumpe für ein Kraftstoffeinspritzsystem |
-
2010
- 2010-09-27 DE DE201010041425 patent/DE102010041425A1/de not_active Withdrawn
-
2011
- 2011-09-01 EP EP11752528.7A patent/EP2625417B1/de not_active Not-in-force
- 2011-09-01 WO PCT/EP2011/065074 patent/WO2012041627A1/de active Application Filing
- 2011-09-01 CN CN201180045756.2A patent/CN103119284B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2012041627A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN103119284A (zh) | 2013-05-22 |
EP2625417B1 (de) | 2015-01-07 |
WO2012041627A1 (de) | 2012-04-05 |
CN103119284B (zh) | 2016-01-20 |
DE102010041425A1 (de) | 2012-03-29 |
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