CN103339376B - High-pressure pump and the drive mechanism for high-pressure pump - Google Patents
High-pressure pump and the drive mechanism for high-pressure pump Download PDFInfo
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- CN103339376B CN103339376B CN201180059501.1A CN201180059501A CN103339376B CN 103339376 B CN103339376 B CN 103339376B CN 201180059501 A CN201180059501 A CN 201180059501A CN 103339376 B CN103339376 B CN 103339376B
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- roller
- cam
- pressure pump
- coating
- drive shaft
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- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 40
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 239000000446 fuel Substances 0.000 claims abstract description 26
- 229920001971 elastomer Polymers 0.000 claims abstract description 16
- 239000000806 elastomer Substances 0.000 claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 17
- 235000012239 silicon dioxide Nutrition 0.000 claims description 13
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 5
- 239000004816 latex Substances 0.000 claims description 5
- 229920001206 natural gum Polymers 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229920003052 natural elastomer Polymers 0.000 claims description 4
- 229920001194 natural rubber Polymers 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000009718 spray deposition Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 125000005624 silicic acid group Chemical group 0.000 claims 2
- 239000010410 layer Substances 0.000 description 12
- 230000001050 lubricating effect Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 239000004902 Softening Agent Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The present invention relates to the high-pressure pump of a kind of fuel injection apparatus for internal combustion engine, including at least one pump piston, in reciprocating motion in a substantially radial direction, described pump piston is via the cam being arranged in described drive shaft and the tappet assembly being arranged on described pump piston, it is driven towards the rotation axis of drive shaft around the rotation of rotation axis by drive shaft, wherein said tappet assembly includes roller, the roller housings face of roller contacts with the work surface of cam, and work surface and/or the roller housings face of wherein said cam are provided with the coating including elastomer at least in part.The invention still further relates to a kind of drive mechanism for high-pressure pump, including drive shaft, described drive shaft has at least one cam and the roller being arranged in roller carriage, wherein, the roller housings face of roller and the work surface Structure deformation of cam, wherein, the work surface of described cam and/or the roller housings face of roller are provided with the coating including elastomer at least in part.
Description
Technical field
The present invention relates to the high-pressure pump of a kind of fuel injection apparatus for internal combustion engine and one for height
The drive mechanism of press pump.
Background technology
In order in fuel injection system, such as common rail system apply high pressure to fuel, additionally there is footpath
Being provided with one or more pump piston to the high-pressure pump of piston, they indirectly or are passed through convex by drive shaft
Wheel or eccentric move reciprocatingly, in order to perform induction stroke and compression stroke.In induction stroke mistake
Cheng Zhong, fuel is inhaled into the pump work space of high-pressure pump, and during compression stroke, compression
The fuel sucked and the high pressure accumulator being sent to common rail system.
In known high-pressure pump, usual roller cam driving means is provided with and is arranged in roller carriage
Roller.
Such as describe in DE 10 2,008 043 429 A1 and a kind of there is camshaft drive
Radial piston pump.In this application, during drive shaft is rotatably disposed at pump case.Described drive shaft
Having cam working face between two axle bushes between cam, described cam working face drives pump piston to do
Move back and forth.Described pump piston in pump case in radial directions by movably guided to making driving
The rotation axis of the cylindrical hole that axle moves and utilize piston base to pass through one can to turn in roller carriage
The roller bearing disposed on described cam working face dynamicly.Described roller carriage is inserted into again tappet originally
In body, described tappet body is guided by linear reciprocating motion in the tappet guide hole of described pump case
And the longitudinal axis around it disposes rotatably.Compression spring passes through tappet body and roller carriage
Pushing roller to described drive shaft, the most described roller is held against on described cam working face.
But, in diesel common rail technology, the most higher pressure just makes driving of the most high efficiency high-pressure pump
Motivation structure is by about tired or abrasion.Above-mentioned drive mechanism is by cam or drive shaft, roller and roller
Bearing forms, and here suffers different friction loads.
Typically, described cam and roller are respectively with stone steel making, wherein, at described cam
With the material between roller constitutes the intermediate layer of lubricating film form.The condition that drive mechanism ideal is run is
Always exist less between cam and roller, but the biggest lubricating film.Because described roller is originally
It is guided in roller carriage in sliding bearing, " adhesion " gram between so-called roller and cam
It must be enough for taking resistance to sliding, in order to persistently rotate with being kept upright.There is provided and persistently rotate
So that described lubricating film produces the most constantly between rolling member, described lubricating film is to overcome directly
The overcoat of metal-metal contact, direct metal-metal contact may cause such as adhering to damage type
Abrasion.But, if described lubricating film-overcoat is too big, for want of adheres, can no longer ensure that rolling
Dynamic motion.This causes the resting state (" water skiing effect ") of described roller, makes again described lubricating film because lacking
Weary rolling movement and reduce suddenly and cause described roller to be driven on camshaft, have later
Adhesion wear.Problem is the especially worse quality of fuel.Here it may happen that, described lubricating film is not
Be formed circlewise and cause increase metal-metal contact state, ultimately result in drive mechanism be worn and
It is out of order.
The requirement that high pressure and fuel temperature are increased and the use indicating poor lubrication or low viscosity material because of
And require to optimize existing system.
In order to avoid high-pressure pump damages because lacking lubricant supply, from known in the art, drive machine
Contact surface on structure Structure deformation is such as coated with painting through such as the process of the surface of nitriding or contact surface
Layer.
DE 103 48 140 A1 describe a kind of for producing high compression ignition in fuel injection system
The radial piston pump of material, described radial piston pump has polygon rotor, and its sliding surface is at least part of
Be provided with the surface lining layer made with ductile or viscoelastic material.As preferred coating material,
It is used herein the alloy of molybdenum, tungsten, ceramic metal or these materials.
The coating with above-mentioned material stops even because its ductility, is sliding because of material fragility
So-called spot corrosion is formed on dynamic face.But the most do not obtain the reliable volume rolled of described cam and roller
Determine the lubricating film that power is required to ensure Structure deformation.
Thus, it is worth that yearns for be to provide a kind of high-pressure pump with drive mechanism, at this driving machine
In structure, it is ensured that the adhesion of Structure deformation regional sustained between described roller and cam and thus persistently rotate,
To reduce abrasion and the fatigue of materials of drive mechanism.
Summary of the invention
According to the present invention, it is provided that a kind of high-pressure pump for internal combustion engine fuel injection equipment, it have to
A few pump piston, described pump piston is arranged in by least one around rotation axis by drive shaft
Cam in drive shaft and the tappet assembly arranged on described pump piston in linear reciprocating motion at base
Being driven to the rotation axis of described drive shaft in basis in the radial direction, wherein, described tappet assembly has
Having a roller, described roller has the roller housings face with cam contact, and wherein, described cam exists
Its work surface and/or roller housings face are provided with a layer with elastomer at least in part.By
On the rolling surface of cam or on roller housings face, elastomer is set, hence it is evident that improve described roller and convex
Structure deformation between wheel, the power being applied on described cam is about 8000N.It is an optimization
Operation, wherein, roller body roller on cam has little skidding.Described coating has height
Adhesion, this show it be in the situation of reliably driven roller and it also have the advantage that,
Usual elastic deformation of the most described coating, thus recover its original form and therefore allow to pass through plasticity
It is deformed without directly wearing and tearing.Adhesion wear and described high-pressure pump in drive mechanism are out of order logical too early
Cross the structure according to the present invention to be effectively prevented from.During particularly in the critical labelling of fuel or at high load capacity,
Elastomer layer in Structure deformation region is particularly useful.
According to a preferred embodiment, described coating is arranged at the higher curvature of described cam.Described convex
It is high load capacity point in drive mechanism at the higher curvature of wheel, on these high load capacity points, beating of described roller
Cunning may cause huge destruction.Layer the most in this region is to stoping these possible destructions
It is effective.
According to another preferred embodiment, between described layer and the rolling surface of cam, arrange that at least one increases
Attached oxidant layer.
According to another preferred embodiment, described coating includes at least one in lower group of material: silicone rubber,
Silicones, natural gum, rubber or latex.When selecting suitable material it is essential that it to be fuel steady
Qualitative, motility and high adhere to.Described coating also be able to use containing silicone resin, gummy, containing rubber
Glue, containing latex or other elastomeric materials, these materials are generally in liquid, solid-state or gaseous form.
Preferably, described elastomer, especially natural gum and rubber, mix at least one additive and/or
At least one filler.Preferably, described filler be pyrogenic silicic acid, the silicic acid injected or white carbon black.One
Planting in preferred embodiment, described additive preferably includes diamond, quartz or white carbon black.Preferably, institute
State silicone rubber and mix cross-linking chemicals as additive, especially peroxide or platinum three-element catalytic
Agent.
According to another preferred embodiment, softening agent, especially silicon polymer base softening agent, it is impregnated in institute
State elastomer.
Preferably, for improving the substance of expansion character and anti-crack ability, especially silicic acid, with
Described coating mixes.It is particularly preferred that add silicic acid when containing silicone resin material.
It is further preferred that when with percentage by weight mixing silicic acid, silicic acid accounting is in 1 weight % (weight
Percentage ratio) and 30 weight % between, especially between 5 weight % and 15 weight %.
According to a preferred embodiment, described elastomer is colourless, and its density 1.05 to
1.14g/cm3In the range of, hardness is in the range of 20 to 55 Shore hardness, and breaking strength is 6.0
To 12.0N/mm2In the range of, elongation at break, in the range of 500 to 1300%, continues anti-disconnected
Resistance is in the range of 15 to 30N/mm, and resilience is elastic to be become with pressure in the range of 50 to 70%
Form drag (22h/175 DEG C) is in the range of 10 to 30%.
According to another preferred embodiment, at least part of coating, by immersing, is then dried and polymerization is made
Become.
According to another preferred embodiment, at least part of coating is executed by spray casting, evaporation or rolling
It is added on the work surface of described cam and/or on roller housings face.
Additionally, it is particularly preferred that the thickness of described coating is positioned in the range of 50nm to 5 μm, especially
It is in the range of 2 μm to 3 μm.
According to present invention also offers a kind of drive mechanism for high-pressure pump, described high-pressure pump has and sets
The drive shaft having at least one cam and the roller being arranged in roller carriage, wherein, described roller
The work surface Structure deformation of roller housings face and described cam, wherein, the work surface of described cam and/or
The roller housings face of roller is provided with the coating made with elastomer at least in part.Driving according to the present invention
Motivation structure does not have adhesion wear by optimizing elastic layer, and thus is using low viscosity or lubrication yet
During the fuel differed from, do not cause being out of order too early of described high-pressure pump.
Accompanying drawing explanation
Below with reference to the accompanying drawings, embodiment of the present invention will be described in more detail.Accompanying drawing illustrates:
Fig. 1 is according to the cross section of the high-pressure pump of prior art；
Fig. 2 is according to the side view of the schematic section cutting of the drive mechanism of prior art；With
Fig. 3 A, 3B are shown respectively cam according to an embodiment of the invention.
Detailed description of the invention
Figure 1 illustrates according to prior art, the high-pressure pump of fuel injection system for internal combustion engine
The cross section of 1.Shown here high-pressure pump 1 is radial piston pump, and uses in common rail system.
High-pressure pump 1 according to prior art has housing 2, arranges and rotate driving of driving in housing 2
Moving axis 3, drive shaft 3 is configured to camshaft.High-pressure pump 1 has at least one or more and is arranged in each
Pump element 4 in cylinder cap 8, pump element 4 respectively has a pump piston 5, and pump piston 5 passes through drive shaft
The cam 6 of 3 is indirectly driven at least approximate radial direction of the rotation axis 7 of relative drive shaft 3
Move reciprocatingly.Pump piston 5 is directed to movably the shaft part 10 of cylinder cap 8 is salable in cylinder holes 9,
And in cylinder holes 9, define pump work space 11 with its side deviating from drive shaft 3.Spring 12
Arrange around shaft part 10.
Pump work space 11 by housing 2 skew fuel inlet channel (not shown) and with combustion
Material entrance, such as delivery pump, be connected.Leading in pump work space 11 at fuel inlet channel
The intake valve 13 being open in pump work space 11 is arranged in outlet.Pump work space 11 also by
The fuel outlet passage 14 of movement in cylinder cap 8 and is connected with outlet, export such as with high-pressure pump memorizer
15 connect.One or more ejectors 16 being arranged on cylinder of internal-combustion engine are with high pressure accumulator 15 even
Connecing, by ejector 16, fuel is ejected in the cylinder of internal combustion engine.Open wide from pump work space 11
Air bleeding valve 17 is arranged in the outlet that fuel outlet passage 14 leads in pump work space 11.
Tappet assembly 24 is allocated to pump element 4, and pump piston 5 is bearing in driving by tappet assembly 24
On the cam 6 of axle 3.Tappet assembly 24 includes hollow circle tube tappet body 18, tappet body 18
Hole 19 is guided movably.On its end deviating from pump work space 11, pump piston 5
There is piston base 20.
Tappet assembly 24 and pump piston 5 inwardly push the convex of drive shaft 3 by the spring 12 of prestrain
Wheel 6.Spring 12 is configured to cincture pump piston 5 and the helical compression bullet extending in tappet body 18
Spring.Spring 12 side is bearing on cylinder cap 8, and opposite side is bearing on spring stop 21.Spring catch
Plate 21 be connected with pump piston 5 and be close to piston land (not being shown specifically here) deviate from roller
On the side of bearing 22.Therefore spring 12 is not only applied on pump piston 5 by spring stop 21, and
And be applied on tappet body 18, in order to as it has been described above, spring 12 pushes the cam 6 of drive shaft 3.
Roller carriage 22 is inserted into tappet body 18 from the side towards drive shaft 3.In roller carriage 22,
Columnar roller 23 is rotatably disposed on the cam 6 towards drive shaft 3 of roller carriage 22
Cylinder section shape recess in.
When drive shaft 3 rotates around rotation axis 7, rotary motion is therefore by cam 6 and tappet
Component passes is on pump piston 5, so that pump piston 5 moves up and down, the most correspondingly performs for will
Fuel is transported to the induction stroke in pump element 4 and the fuel being transported in pump element 4 for compression
Compression stroke.Then that compress or pressure fuel flow to high pressure accumulator 15 by air bleeding valve 17.
Fig. 2 is the side view of the schematic section cutting of the drive mechanism 25 according to prior art, drives
Mechanism 25 includes the cam 6 being arranged in drive shaft 3 and the roller 23 being placed in roller carriage 22,
Cam 6 has work surface 27, and roller 23 has roller housings face 26.Cam 6 and roller 23 are all
With hard steel manufacture.If cam 6 is rotated around its rotation axis 3 by drive shaft 3, in rolling
Fuel mix lubricating layer is used on dynamic roller contact 28 between shell surface 26 and the work surface 27 of cam 6,
But when lacking rolling movement, lubricating layer may reduce suddenly, this causes roller 23 to be driven into cam
On 6.This danger exists when using low viscosity or inferior fuel equally.
Fig. 3 A and 3B is shown respectively the cam 6 according to an embodiment, and cam 6 manufactures with hard steel.
In embodiment shown in figure 3 a, cam 6 is provided with coating 29, coating on its work surface 27
29 cover whole work surfaces 27.Coating 29 be rubber-like, fuel stabilization, flexibly with height glue
Attached layer, the silicone rubber that this layer accounts for 10 weight % with silicic acid is made.Alternatively, coating 29 also is able to use
Other elastomeric material constitute, such as silicones, natural gum, rubber or latex or containing silicone resin, contain
Natural gum, containing latex or containing the material of rubber, use or do not use silicic acid additive.Coating
29 have high adhesion and therefore driven roller 23 (seeing Fig. 2).Because coating 29 is to use bullet
Gonosome is made, and it this have the advantage that its elastic deformation and recovers its original shape, wherein,
By plastic deformation, do not occur directly to wear and tear.In the surface of cam 6 or work surface 27 and coating 29
Between can be additionally arranged one or more bonding coating.Coating 28 by immerse and then be dried and
It is polymerized described elastomer and is applied on cam 6.Alternatively, however, spray casting, be deposited with or roll
Limit is also possible.Described coating can be in vacuum or normally depress coating.According to coating process, move back
Fire is required.Alternatively, however, or depend on used material, the polymerization of described elastomer
The most at room temperature carry out.Inorganic or organic substance additive can promote polymerization.The thickness of coating 28
It is 5 μm in the present embodiment.But, thicker or thinner thickness is equally possible.At Fig. 3 B
The embodiment illustrated is in place of being different from the embodiment shown in Fig. 3 A, and coating 28 is only part
Ground applies, in the high curvature areas 30 of the work surface 27 being i.e. only applied to cam 6.
By the structure of the present invention, effectively provide a kind of drive mechanism 25 for high-pressure pump 1, its
In be effectively prevented from adhesion wear, stop again being out of order too early of high-pressure pump 1.
Claims (14)
1., for the high-pressure pump (1) of internal combustion engine fuel injection equipment, there is at least one pump piston (5),
Described pump piston (5) because of drive shaft (3) around the rotation of rotation axis (7) by being arranged in
State the cam (6) in drive shaft (3) and the tappet assembly (24) being arranged on described pump piston (5)
The general radial direction of the rotation axis (7) of the most described drive shaft (3) is done back and forth by driving
Motion, wherein, described tappet assembly (24) has roller (23), and described roller has roller housings
Face (26), described roller housings face (26) contacts with the work surface (27) of described cam (6),
It is characterized in that,
Described cam (6) is upper at its work surface (27) and/or described roller housings face (26) extremely
Partially being provided with coating (29), described coating (29) has elastomer.
High-pressure pump the most according to claim 1 (1), it is characterised in that described coating (29)
It is arranged at the higher curvature of described cam (6) on (30).
High-pressure pump the most according to claim 1 and 2 (1), it is characterised in that at least one increases
Attached oxidant layer is arranged between the work surface (27) of described coating (29) and described cam (6).
High-pressure pump the most according to claim 1 and 2 (1), it is characterised in that described coating (29)
Including at least one material in the group being made up of silicones, natural gum, rubber or latex.
High-pressure pump the most according to claim 4 (1), it is characterised in that described coating (29)
Mix with the substance of anti-crack ability with for improving expansion character.
High-pressure pump the most according to claim 5 (1), it is characterised in that substance is silicic acid,
Wherein, silicic acid mixes with the percentage by weight between 1 weight % and 30 weight %.
High-pressure pump the most according to claim 1 and 2 (1), it is characterised in that described coating (9)
By immersing, then it is dried and polymerization is made.
High-pressure pump the most according to claim 1 and 2 (1), it is characterised in that described coating (29)
By spray casting, be deposited with or roll, be applied to described cam (6) work surface (27) and/or
On roller housings face (26).
High-pressure pump the most according to claim 1 and 2 (1), it is characterised in that described coating (29)
Thickness in the range of having between 50nm to 5 μm.
High-pressure pump the most according to claim 5 (1), it is characterised in that described substance
It is silicic acid.
11. high-pressure pumps according to claim 6 (1), it is characterised in that described silicic acid is with position
Percentage by weight mixing between 5 weight % and 15 weight %.
12. high-pressure pumps according to claim 1 and 2 (1), it is characterised in that described coating
(29) there is the thickness in 2 μm to 3 μ m.
13. high-pressure pumps according to claim 4 (1), it is characterised in that described rubber is silicon
Rubber.
14. drive mechanisms (25) being used for high-pressure pump (1), described drive mechanism (25) has drives
Moving axis (3) and roller (23), wherein, described drive shaft (3) is provided with at least one cam (6)
It is arranged in roller carriage (22) with described roller (23), wherein, the rolling of described roller (23)
Subshell face (26) and work surface (27) roller contact of described cam (6), it is characterised in that
The work surface of described cam (6) and/or the roller housings face (26) of described roller (23) are extremely
Partially being provided with coating (29), described coating (29) has elastomer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010042295 DE102010042295A1 (en) | 2010-10-12 | 2010-10-12 | High pressure pump and engine for a high pressure pump |
| DE102010042295.9 | 2010-10-12 | ||
| PCT/EP2011/066199 WO2012048984A1 (en) | 2010-10-12 | 2011-09-19 | High-pressure pump and drive for a high-pressure pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103339376A CN103339376A (en) | 2013-10-02 |
| CN103339376B true CN103339376B (en) | 2016-11-30 |
Family
ID=
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10348140A1 (en) * | 2003-10-16 | 2005-05-12 | Daimler Chrysler Ag | Polygonal rotor for radial piston pump for common-rail fuel injection system of automobile internal combustion engine has sliding surfaces for working pistons provided with ductile material surface coating |
| CN101389858A (en) * | 2006-02-20 | 2009-03-18 | 罗伯特·博世有限公司 | High pressure pump in particular for a fuel injection device on an internal combustion engine |
| DE102008015023A1 (en) * | 2008-03-19 | 2009-09-24 | Continental Aktiengesellschaft | Rubber compound with low heat build-up |
| CN101636579A (en) * | 2007-03-16 | 2010-01-27 | 罗伯特·博世有限公司 | High-pressure pump for delivering fuel comprising a torsion-decoupled compression spring element in the plunger unit |
| DE102009001314A1 (en) * | 2009-03-04 | 2010-09-09 | Robert Bosch Gmbh | Drive for high-pressure pump i.e. fuel injection pump, of internal-combustion engine in motor vehicle, has roller cooperating with cam, where roller is rotatably supported in edge-open recess of roller shoe |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10348140A1 (en) * | 2003-10-16 | 2005-05-12 | Daimler Chrysler Ag | Polygonal rotor for radial piston pump for common-rail fuel injection system of automobile internal combustion engine has sliding surfaces for working pistons provided with ductile material surface coating |
| CN101389858A (en) * | 2006-02-20 | 2009-03-18 | 罗伯特·博世有限公司 | High pressure pump in particular for a fuel injection device on an internal combustion engine |
| CN101636579A (en) * | 2007-03-16 | 2010-01-27 | 罗伯特·博世有限公司 | High-pressure pump for delivering fuel comprising a torsion-decoupled compression spring element in the plunger unit |
| DE102008015023A1 (en) * | 2008-03-19 | 2009-09-24 | Continental Aktiengesellschaft | Rubber compound with low heat build-up |
| DE102009001314A1 (en) * | 2009-03-04 | 2010-09-09 | Robert Bosch Gmbh | Drive for high-pressure pump i.e. fuel injection pump, of internal-combustion engine in motor vehicle, has roller cooperating with cam, where roller is rotatably supported in edge-open recess of roller shoe |
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