CN107002603A - The low pressure regulating system of the fuel delivery means of fuel injection system and release valve for this - Google Patents
The low pressure regulating system of the fuel delivery means of fuel injection system and release valve for this Download PDFInfo
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- CN107002603A CN107002603A CN201580061666.0A CN201580061666A CN107002603A CN 107002603 A CN107002603 A CN 107002603A CN 201580061666 A CN201580061666 A CN 201580061666A CN 107002603 A CN107002603 A CN 107002603A
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- Prior art keywords
- valve
- fuel
- piston
- low pressure
- pressure regulating
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Classifications
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- 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
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
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- 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
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0041—Means for damping pressure pulsations
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- 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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Abstract
The present invention proposes a kind of low pressure regulating system of fuel delivery means for fuel injection system.The low pressure regulating system is implemented with transfer pipeline (12), at least one fuel filter (14) being arranged in the transfer pipeline (12) and the adjustment element (15) that can be controlled being arranged in addition in the transfer pipeline (12), the transfer pipeline constitutes the input section from delivery pump (13) to high-pressure pump (18), the adjustment element continues the transport Stream that can be pre-selected to lead to the high-pressure pump (18), wherein, the unnecessary conveying capacity conveyed by the delivery pump (13) is exported in return line (22) by means of overflow valve (20).Energy hydraulic control is additionally provided with addition to the adjustment element (15) that can be controlled releases valve (30), and this releases valve and above exports flow direction of at least one portion amount along fuel in unnecessary conveying capacity from transfer pipeline (12) in fuel filter (14).
Description
Technical field
It is used for this present invention relates to a kind of low pressure regulating system of fuel delivery means of fuel injection system and one kind
Release valve.
Background technology
Known fuel delivery means have the low tension loop with delivery pump, and the delivery pump takes out fuel from fuel tank
Go out and be supplied to input side via the transfer pipeline of high-pressure pump.At least one high pressure side outlet of high-pressure pump guides to high tension loop
In and guided to via pressure duct in high pressure accumulator (also referred to as common rail).High pressure accumulator and at least one fuel injection
Device is connected, and fuel is injected in the combustion chamber of internal combustion engine via the fuel injector.In low tension loop, in delivery pump and high pressure
At least one fuel filter for being used to filter out solid particle from fuel is disposed between pump.Regulating element is connected to high pressure
Before the input side of pump, by the regulating element according to demand and be variably set by delivery pump be supplied to high-pressure pump fuel
Amount.The regulating element of this also referred to as metering unit is associated with overflow along the flow direction of fuel behind fuel filter
Extra fuel amount is directed back in fuel tank by valve, the overflow valve via return line.Thus in fuel filter in transfer pipeline
Pressure below is adjusted to the value of a substantial constant, wherein, all unnecessary conveying capacities are behind fuel filter in downstream
It is exported.The processing mode has advantages below：The good clean level of fuel is quickly realized due to high filtration flow.But this
The filtration device structure size, it is necessary to certain is on the other hand meant that, the filtration device structure size needs corresponding big structure empty
Between and thus cause corresponding higher cost.In addition, always the amount of releasing by fuel filter it is meant that occur with dirty particle to combustion
Expect the quick load of filter, thus required frequently refuelling filter.
A kind of low pressure regulating system as known to the A1 of EP 2159406, in the low pressure regulating system, delivery pump is associated with can
Hydraulic control releases valve, and this releases valve to be led along total unnecessary conveying capacity of the flow direction of fuel before fuel filter
Go out.Here, the control piper for manipulation is in delivery pipe between fuel filter and high-pressure pump from along fuel flowing direction
Diverged out in road.Filtering traffic is reduced to by the processing mode by the conveying capacity being actually needed.
The content of the invention
Advantages below is had according to the low pressure regulating system of the present invention：Not only reduce filtering traffic but also can will be directed to height
Cooling and lubrication amount required for press pump are set as the size needed.Furthermore, it is possible to cancel the throttling arrangement in aspiration, by
This can reduce the modification diversity for the delivery pump to be used.In addition, reduction cavitation erosion risk.By releasing valve according to the present invention
Can realize in a straightforward manner according to the present invention low pressure regulating system, and the low pressure regulating system can use it is known
Have in the low pressure regulating system of metering unit and overflow valve.
The favourable expansion scheme and improvement project of the present invention is realized by the measure of dependent claims.
In order to the unnecessary conveying capacity that is above had been derived from fuel filter along the flow direction of fuel be referred to as release
At least one portion amount of amount, here it is particularly advantageous that release the control of valve control room from the return line interception in overflow valve downstream
Pressure.Hydraulic control circuit is set for this, and the control piper is connected in overflow valve downstream with hydraulic way with return line.In order to
Produce enough control pressures, it is advantageous to which streamwise is being returned in control piper behind the turnoff of return line
Flow tube is disposed with hydraulic restriction in road, and the throttling arrangement produces corresponding retarding pressure in control piper.
By arranging that another hydraulic restriction can realize the hydraulic pressure behavior for the stabilization for releasing valve in control piper, its
Mode is to carry out vibration damping to valve motion.But the other hydraulic restriction can also pass through the corresponding of control piper itself
Small diameter is implemented.
In order to export the amount of releasing, the entrance of valve is released by the flow direction of outfall curb fuel before fuel filter
Face is hydraulically connected with transfer pipeline, and the outlet for releasing valve passes through return line and the aspiration guided in fuel tank hydraulically
Connection.
Functional integrated for excess pressure valve and/or bypass valve, releasing valve can be provided with the second control piper and/or the
Three control pipers.
Releasing the favourable first embodiment of valve can be achieved in：Valve piston has the bullet for being respectively provided with same diameter
Spring room side piston section and control room side piston section, valve piston are directed to by the two piston sections in pilot hole；Tool
Another piston region section for having small diameter is located between described two piston sections；Diameter mutation cage structure with guiding valve seamed edge
On ring surface between spring housing's side piston section and another piston section with small diameter.Here, be additionally provided with
Release pipeline connection enters incoming interface and the discharge interface being connected with return line, wherein, discharge interface is persistently led in valve chamber,
And enter incoming interface provided with valve opening.
Another for releasing valve is particularly suitable for being integrated into the additional functional of excess pressure valve into the favourable implementation released in valve
Mode can be achieved in：Pilot hole is embodied as shoulder hole；Valve piston is configured with spring housing's side piston section and is contiguous to the work
Fill in control room side piston section on section, with small diameter；Spring housing's side piston section and it is adjacent, with smaller straight
The control room side piston section in footpath is directed in pilot hole respectively so that between the two piston sections valve chamber construction in
In stair-stepping pilot hole；The incoming interface that enters being connected with releasing pipeline is persistently led in valve chamber, the discharge being connected with return line
Interface is provided with valve opening.
Another for releasing valve is particularly suitable for the additional functional of excess pressure valve and bypass valve being integrated into and released in valve
Advantageous embodiment can be achieved in：It is provided with the first bypass conduit and the second bypass conduit；First bypass conduit is from entering
Diverge out and led to by the first bypass opening in pilot hole in incoming interface；Second bypass conduit diverges out from discharge interface
And led to by the second bypass opening in spring housing.For this it is necessary that by valve piston in the state of control room no pressure
It is maintained in centre position.This can be achieved in, and its mode is, except in the external control room of the compression spring additionally
Another compression spring is disposed with, another compression spring acts on against the compression spring and valve piston is maintained at into interposition
In putting, in the centre position, closed into opening and the first bypass opening by spring housing's side piston section.
In order to prevent leakage from being flowed into along flow direction backward by control piper in return line and so that not
The fuel of filtering can reach high-pressure pump, desirably, will leak out and exported from valve chamber and control room.Set, lived in valve for this
Circular groove is disposed with the side face of plug between valve chamber and control room, the groove is hydraulically connected by hole with spring housing.
Brief description of the drawings
Embodiments of the invention are shown in the drawings and are more specifically explained in ensuing explanation.
Accompanying drawing is shown：
The part that Fig. 1 has the fuel delivery means of the low pressure regulating system according to the present invention according to first embodiment is shown
It is intended to,
Fig. 2 according to the present invention low pressure regulating system the characteristic curve for releasing valve,
Fig. 3 according to low pressure regulating system of the second embodiment according to the present invention,
Fig. 4 according to low pressure regulating system of the 3rd embodiment according to the present invention,
Fig. 5 according to low pressure regulating system of the fourth embodiment according to the present invention,
Fig. 6 according to the schematic diagram that releases valve of the first embodiment according to the present invention,
Fig. 7 according to the schematic diagram that releases valve of the second embodiment according to the present invention,
Fig. 8 according to the schematic diagram for releasing valve of the 3rd embodiment according to the present invention, and
Fig. 9 is according to the 4th embodiment according to the schematic diagram for releasing valve of the invention.
Embodiment
Figure 1 illustrates the fuel injection system for internal combustion engine fuel delivery means show with low pressure adjust be
The low tension loop 10 of system.Low tension loop 10 includes aspiration 11, transfer pipeline 12, delivery pump 13 and at least one fuel filter
Device 14.The low pressure regulating loop is associated with for example being configured to the controllable adjustment element 15 of metering unit, overflow valve 20 and can
Hydraulic control releases valve 30, wherein, valve 30 is released by hydraulic control circuit 33 to manipulate.Here, fuel filter 14 exists
Arranged between delivery pump 13 and controllable adjustment element 15 in transfer pipeline 12.
Delivery pump 13 as pre- conveying pump work and from fuel tank 17 suction of fuel and by fuel via delivery pipe
Road 12 is delivered to the input side of high-pressure pump 18 by fuel filter 14.Pressure duct 19 leads to unshowned combustion from high-pressure pump 18
Expect memory (also referred to as rail), wherein, high-pressure pump 18 is by the fuel conveyed by delivery pump 13 with the height for example more than 1600bar
Press to compress and be pumped into high pressure accumulator via pressure duct 19.Same unshowned fuel injector is connected to fuel
On memory.Fuel is injected in the combustion chamber of internal combustion engine under high pressure by means of fuel injector.
Controllable adjustment element 15 is connected in transfer pipeline 12 before the input side of high-pressure pump 18.By controllable
Adjustment element 15 be set in variable percolation cross section in transfer pipeline 12 of the upstream before the input side of high-pressure pump 18,
Thus changeably to form fuel from delivery pump 13 to the inflow of high-pressure pump 18 and thus can to make to convey by high-pressure pump 18
Fuel quantity adapt to the demand of internal combustion engine.
Controllable adjustment element 15 is associated with overflow valve 20.Therefore, in the controllable upstream of adjustment element 15 from conveying
Diverged out return line 22 in pipeline 12, and overflow valve 20 is arranged in the return line.Overflow valve 20 be used for by high-pressure pump 18 by
In adjustment element 15 setting without fuel quantity export and for example led via return line 22 as unnecessary conveying capacity
Return in fuel tank 17.Hydraulic restriction 23 is there also is provided in return line 22, the throttling arrangement is also discussed in detail afterwards
Function.
Valve 30 is released with entrance 34, and the entrance is by releasing flow direction of the pipeline 31 along fuel in fuel filter 14
Above hydraulically it is connected with transfer pipeline 12.Return line 32 is directed back in aspiration 11 or straight from the outlet 35 for releasing valve 30
Connect and be directed back in fuel tank 17.Release after the valve that valve 30 is hydraulic control, embodiments thereof in Fig. 6,7,8 and 9 in detail
Description.
Hydraulic control circuit 33 is used for hydraulically manipulation and releases valve 30.Hydraulic control circuit 33 will release the control pressure of valve 30
The return line 22 that power input 39 leaves the direction of overflow valve 20 with guiding into is connected.Here, hydraulic control circuit 33 arrives return duct
On road 22 be attached at the downstream of overflow valve 20 and be located in the upstream of hydraulic restriction 23 overflow valve 20 and throttling arrangement 23 it
Between.It is arrested in before throttling arrangement 23, is thus improved via the derived fuel of the institute of overflow valve 20 by adjustable adjustment element 15
Pressure in control piper 33.Therefore valve 20 is released to be manipulated and be brought in the state of the second switch of opening position.Thus
Part amount through the unnecessary conveying capacity along the flow direction of fuel before fuel filter 14 is as the amount of releasing via releasing
Pipeline 31 and the export of return line 32 are returned in aspiration 11 or returned in fuel tank 17.Here, the export for the amount of releasing also may be used
To be carried out inside delivery pump.Here, the conveying capacity being above exported in fuel filter with by overflow valve 20 lead back to it is unnecessary
Retarding pressure in conveying capacity and the control piper 33 thus set up by throttling arrangement 23 is relevant.Because with unnecessary conveying capacity
Increase, such as, as internal-combustion engine rotational speed increases or as input pressure increases, fuel is arrested in the throttling dress in return line 22
Put on 23.This causes the pressure in control piper 33 to increase, and the pressure, which is manipulated, releases valve 30, as being explained as after.
But in order to set up control pressure in control piper it is necessary that by another part amount of unnecessary conveying capacity from overflow
Stream valve 20 is exported in return line 22.Thus, current low pressure regulating system is incorporated from the unnecessary of transfer pipeline 12
The Part I amount for being referred to as the amount of releasing of conveying capacity is by means of releasing flow direction of the valve 30 along fuel before fuel filter
Face release and unnecessary conveying capacity from transfer pipeline 12 flow direction of the Part II amount via overflow valve 20 along fuel
Export behind fuel filter 14.
Therefore, valve 30 is released with the characteristic according to shown in fig. 2 characteristic curve A and B, wherein, show by releasing
Relations of the amount of the releasing Q on the pressure p in control piper 33 derived from valve 30.Here, pressure need not be opened clearly.With
The increase of pressure p in control piper 33, releases valve 30 and only slowly opens, and is that this characteristic curve should suitably flat trend.
This, characteristic curve can linearly be moved towards according to characteristic curve A or non-linearly moved towards according to characteristic curve B.Nonlinear characteristic line B is special
Suitable for limitation filtering traffic.
Significant for releasing the hydraulic pressure behavior of stabilization of valve 30 can manipulate vibration damping and release valve 30.For
This, another hydraulic restriction 36 is disposed with according to Fig. 3 in control piper 33.But it is also possible that another throttling arrangement
36 are implemented by the corresponding small diameter of control piper 33.Thus only have very small pulse to be applied to from overflow valve 20 to release
On valve 30.Conversely, then also hampering the motion for the valve piston for releasing valve 30, this is further avoided the vibration in low tension loop 10.
The 3rd embodiment of low pressure regulating system is learnt by Fig. 4, in this embodiment, in addition to control piper 33, is let out
Go out valve 30 and be additionally provided with the second control piper 37.For example it will can be beaten by the embodiment when fuel filter 14 blocks
The function of excess pressure valve open, unshowned, which is integrated into, releases in valve 30.This specific embodiment is combined and releases valve 30 in figure
7th, the embodiment that shows in 8 and 9 is described.
Fig. 5 shows the fourth embodiment of low pressure regulating system, in this embodiment, except the peripheral hardware of the second control piper 37
It is equipped with the 3rd control piper 38.Can be except the mistake described in the embodiment according to Fig. 4 by the 3rd control piper 38
Additionally the function of unshowned bypass valve is integrated into outside the feature of pressure valve and released in valve 30, the bypass valve is for example in mistake
After filter replacing or fuel tank emptying should open during system filling, as after with reference to Fig. 9 will also be explained in more detail
Like that.
The detailed embodiment for releasing valve 30 used in low pressure regulating system described in Fig. 1 to 5 is by following
Described Fig. 6,7,8 and 9 are learnt.Therefore, releasing valve 30 with housing 41, pilot hole 42 is received in the housing, at this
Valve piston 43 is reciprocally directed to against the spring force of compression spring 54 in pilot hole.It is additionally provided with pilot hole 42
Valve chamber 40.Valve piston 43 is exposed to hydraulic control room 50 with chain of command 57, wherein, valve piston 43 is stressed loading in control room 50
When implement to move back and forth against the spring force of compression spring 54, and herein with pressure correlation towards the relief valve opening of valve chamber 40
60.Therefore, being configured with guiding valve seamed edge 59 on valve piston 43, the guiding valve seamed edge is opened and closes valve opening 60.Here, valve is lived
Plug 43 is with first end face 51 exposed to spring housing 53 and to construct the second end face 52 in respective side exposed to control room 50.
Compression spring 54 is arranged in spring housing 53 and is applied to the direction of spring force towards control room 50 on valve piston 43.Control
Room 50 is provided with control piper interface 55, and the control piper interface forms control pressure input 39 and is connected to control piper 33
On.Exposed to the chain of command 57 of the formation manipulation valve piston 43 of second end face 52 of control room 50.Enter incoming interface 45 to be constructed into
Mouthfuls 34 and lead in pilot hole 42, discharge interface 46 is led in pilot hole 42 to construct outlet 35.Enter incoming interface 45 with letting out
Go out pipeline 31 hydraulically to connect, discharge interface 46 is hydraulically connected with return line 32.Depending on embodiment, enter incoming interface
45 or discharge interface 46 be used as can be according to pressure-operated valve opening 60.Correspondingly, the following described of valve 30 is released
Embodiment be embodied as guiding valve.
In order to be filled due to leakage with the release of the spring housing 53 of fuel, spring housing 53 is provided with leading-out portion 56, the export
Portion is suitably guided in return line 22 in the downstream of throttling arrangement 23 by means of unshowned hydraulic connecting or is alternatively oriented to back
In flow tube road 32.
In figure 6, be related in the embodiment of the embodiment of the low pressure regulating system according to Fig. 1 and 3, valve piston 43 has
Have spring housing's side piston section 48 and with the intersegmental control room side piston section 49 separated in the piston region.With the another of small diameter
One piston section 47 is between two piston sections.Another piston section 47 with small diameter is for example in annular groove
(Einstich) form is realized.Preferably there is the piston section 48,49 of same diameter respectively by two, valve piston 43 is being led
It is directed into hole 42.Valve chamber 40 is constructed in pilot hole 42 between two piston sections 48,49 spaced apart.Therefore, exist
Produced between spring housing's side piston section 48 and another piston section 47 with small diameter with the annular for pointing to valve chamber 40
The diameter mutation portion 44 in face 58.Diameter mutation portion 44 constitutes guiding valve seamed edge 59 on ring surface 58.
In the embodiment of valve 30 is released, the discharge interface 46 being connected with return line 32 persistently leads to valve chamber 40
In.With release that pipeline 31 is connected enter to be configured with valve opening 60 on incoming interface 45, switch of the valve opening in cut-off that is showing
Closed in the state of position by constructing the guiding valve seamed edge 59 in diameter mutation portion 44.Therefore, there is no edge in the switch position state of cut-off
Release amount of the flow direction of fuel before fuel filter 14 is exported from transfer pipeline 12.Controlled with control room 50
The increase of pressure, the valve opening that valve piston 43 is moved against compression spring 54 and guiding valve seamed edge 59 is discharged on interface 45
60.Therefore, produced by valve chamber 40 into the hydraulic connecting between incoming interface 45 and discharge interface 46, thus from transfer pipeline 12
Flow direction of the amount of releasing along fuel before fuel filter 14 via releasing pipeline 21 and the export of return line 22 is returned to
In aspiration 11.The flow direction for the amount of releasing is shown by arrow.Here, the characteristic for releasing valve 30 can be by leading to guiding
Diameter moulding in other words, the diameter by valve piston 43 and/or the feature by compression spring 54 of valve opening 60 in hole 42
Line influences.
For releasing the embodiment of valve 30 advantageously, leakage is prevented to pass through control pipe along flow direction backward
Road 33 is entered in return line 22, because otherwise unfiltered fuel may be reached in high-pressure pump 18.It is as described in Figure 6
Embodiment meets the requirement because exist on valve piston 43 from control piper 33 towards the direction of discharge interface 46 or
Say the pressure drop towards the direction of aspiration 11.If having unfiltered fuel on rare occasion passes through control piper 33
And reach, then what the unfiltered fuel was leading by accounting for flow through direction is via return line 22 and throttling arrangement 23 from high-pressure pump
Exported in 18, thus contaminated fuel do not reach adjustment element 15 and high-pressure pump 18.
For realize be directed to figure 4 illustrates low pressure regulating system the embodiment for releasing valve 30 figure 7 illustrates.
Herein, pilot hole 42 is embodied as the shoulder hole with diameter end difference 65, and it is in rank accordingly that valve piston 43 has for this
The structure type of scalariform, the structure type has spring housing's side piston section 61 and is contiguous on spring housing's side piston section
, control room side piston section 62 with small diameter.Here, valve piston 43 respectively by spring housing's side piston section 61 simultaneously
And be directed to by adjacent spring housing's side piston section 62 in stepped pilot hole 42.Therefore, lived in spring housing side
Fill in and ring surface 63 is produced between section 61 and control room side piston section 62 with small diameter, the ring surface is constituted to have and slided
The diameter mutation portion 44 of valve seamed edge 59.The structure between diameter end difference 65 and diameter mutation portion 44 in pilot hole 42 of valve chamber 40
Into.Therefore, the ring surface 63 with diameter mutation portion 44 is exposed to valve chamber 40.In addition, in the control room side with small diameter
The rounded face 64 exposed to control room 50, rounded face formation chain of command 57 are there are on piston section 62.Different from Fig. 6
Embodiment, the incoming interface 45 that enters being connected in the embodiment for release valve 30 with releasing pipeline 31 persistently guides to valve chamber 40
In.Thus, incoming interface 45 is entered while forming the second additional control piper 37 as described in Figure 4.Connect with return line 32
The discharge interface 46 connect has valve opening 60, and the valve opening is mutated in the switch position state of shown cut-off by constructing in diameter
Guiding valve seamed edge 59 in portion 44 is closed.In order that releasing the feature that valve 30 disclosure satisfy that excess pressure valve, ring surface 63 is compared to circle
Chain of command 57 should smaller be implemented in other words in shape face 64.
When by control piper 33 and control piper interface 55 to 50 on-load pressure of control room, valve piston 43 is against compression
Spring 54 is moved, the valve opening 60 in the release discharge interface 46 of guiding valve seamed edge 59 so that streamwise is in fuel filter 14
The amount of releasing above is returned in aspiration 11 from the export of transfer pipeline 12.Here, the flow direction for the amount of releasing is same with arrow
Show.By shown connection, pipeline 31 is released in the connection and is continuously connected with by entering incoming interface 45 with valve chamber 40, simultaneously
The excessive pressure increase on fuel filter 14 is prevented, as with reference to as described in the embodiment according to Fig. 4.If by
Occur what is do not allowed in region in strong filtration load or other failures and between delivery pump 13 and fuel filter 14
Pressure increases, then produces the relevant pressure loading to ring surface 63, thus valve piston 43 is equally implemented against compression spring 54
Move back and forth, thus the valve opening 60 in the release discharge interface 46 of guiding valve seamed edge 59 is simultaneously set up into incoming interface 45 and discharge interface 46
Between hydraulic connecting so that the fuel above blocked in fuel filter 14 along the flow direction of fuel in transfer pipeline 12
It can be back in aspiration 11.Thus realized in a straightforward manner for transfer pipeline 12 by means of the described valve 30 that releases
Region of the flow direction along fuel before fuel filter 14 excess pressure valve function.
Figure 8 illustrates another embodiment for releasing valve 30 of the embodiment in Fig. 4.Such as implementation in the figure 7
In mode like that, valve 30 is released to this with stepped valve piston 43, wherein, the control room side piston with small diameter
Section 62 has circular groove 66 on side face, and the groove is connected by transverse holes 67 and longitudinal hole 68 with spring housing 53.Therefore, groove
66 move towards on the side face of valve piston 42 between valve chamber 40 and control room 50.The advantage of the groove 66 is that the leakage of both sides is accumulated
Gather in groove 66 and reach in spring housing 53, from the spring housing, leakage connects via leading-out portion 56 and unshowned hydraulic pressure
Connect to guide to and guided in return line 22 or alternatively in the suction side of delivery pump 13 in return line 32.Thus prevent, fuel
" contaminated " side in transfer pipeline 12 from streamwise before fuel filter 14 reaches streamwise and is in combustion
Expect on " cleaning " side behind filter 14.
For realize be directed to figure 5 illustrates low pressure regulating system the embodiment for releasing valve 30 figure 9 illustrates.
The embodiment has the identical structure type for valve piston 43, and the structure type has spring housing side as shown in Figure 7
Piston section 61 and the control room side piston section 62 with small diameter.Additionally, there are the ring surface 63 for having sensing valve chamber 40
With the rounded face 64 exposed to control room 50, the ring surface also constitutes the diameter mutation portion 44 with guiding valve seamed edge 59 herein,
Rounded face formation chain of command 57.From unlike the embodiment in Fig. 7, in order to which valve piston 43 is centrally positioned into position
In, another compression spring 71 is additionally arranged in control room 50 in addition to the compression spring 54 arranged in spring housing 53,
Another compression spring acts in rounded face 64 and abuts against chain of command 57 and acts on.In embodiment in figures 7 and 8
Like that, pipeline 31 is released while forming in Fig. 4 described additional the by enter that incoming interface 45 and valve chamber 40 be continuously connected with
Two control pipers 37.In order to construct the 3rd control piper 38, the first bypass conduit 73 and the second bypass conduit 74 are configured with.
This, bypass conduit 73,74 can be suitably integrated into housing 41 as shown.First bypass conduit 73 connects from entrance
Diverge out and led to by the first bypass opening 75 in pilot hole 42 in mouth 45, wherein, in shown valve piston 43
Between in position, the first bypass opening 75 is closed by spring housing's side piston section 61.Second bypass conduit 74 is from discharge interface 46
Diverge out and led in the centre position of shown valve piston 43 by the second bypass opening 76 in spring housing 53.
Figure 9 illustrates embodiment combine described streamwise before fuel filter 14 according to logical
Cross the amount of the releasing export of the control pressure of the transmission of control piper 33, basis is being schemed before fuel filter 14 by transfer pipeline 12
The conveying capacity of excess pressure valve function described in 4 is exported and defeated by means of the fuel of bypass valve function as described in Figure 5
Device is sent to fill.Be achieved in over-pressed function, its mode is, when occurring pressure in pipeline is released due to filter blocks and
The pressure is delivered in valve chamber 40 by entering incoming interface 45 during increase, and thus valve piston 43 is moved simultaneously towards the direction of spring housing 53
And discharge the valve opening 60 in discharge interface 46 in this guiding valve seamed edge 59.Thus fuel streamwise is before fuel filter 14
Surface current is returned in aspiration 11.If filling pump or similar by single, unshowned to fill fuel delivery means
Device is connected in aspiration 11, then fuel is pumped into discharge interface 46 against the shown direction of arrow, and from
There is pumped into spring housing 53 via the second bypass conduit 74 and the second bypass opening 76.Thus the pressure in spring housing 51 increases
It is big and valve piston 43 is moved towards the direction of control room 50, thus discharge the first bypass opening 75.Therefore, fuel is from suction
Pipeline 11 is via discharge interface 46, the second bypass conduit 74, the second bypass opening 76, spring housing 53, the first bypass opening 75,
One bypass conduit 73 and enter incoming interface 45 and flow in the transfer pipeline 12 of the upstream of fuel filter 14, and pass through fuel mistake from that
Filter 14 continues to run to high-pressure pump 18.Switchable bypass around delivery pump 13, the bypass replacement are produced by the feature
For bypass valve, the bypass valve is needed to change filter or be vented the later carry out system filling of fuel tank in other cases.
Claims (16)
1. the low pressure regulating system of the fuel delivery means of fuel injection system, the low pressure regulating system has transfer pipeline
(12), at least one fuel filter (14) being arranged in the transfer pipeline (12) and the transfer pipeline is arranged in addition
(12) adjustment element (15) that can be controlled in, the transfer pipeline constitutes the input from delivery pump (13) to high-pressure pump (18)
Section, the adjustment element continues the transport Stream that can be pre-selected to lead to the high-pressure pump (18), wherein, by the delivery pump
(13) the unnecessary conveying capacity of conveying is exported in return line (22) by means of overflow valve (20), it is characterised in that except described
Energy hydraulic control is additionally provided with outside the adjustment element (15) that can be controlled releases valve (30), and this releases valve by unnecessary conveying
Flow direction of at least one portion amount along the fuel in amount is in the fuel filter (14) above from the delivery pipe
Exported in road (12).
2. low pressure regulating system according to claim 1, it is characterised in that described release valve (30) in order to manipulate and be provided with
Hydraulic control circuit (33), the control piper is hydraulically connected with the return line (22).
3. low pressure regulating system according to claim 2, it is characterised in that streamwise is in the control piper (33)
Hydraulic restriction (23) is disposed with the return line (22) behind the turnoff of the return line (22).
4. the low pressure regulating system according to Claims 2 or 3, it is characterised in that arranged in the control piper (33)
Another hydraulic restriction (23).
5. low pressure regulating system according to claim 1, it is characterised in that the entrance (34) for releasing valve (30) passes through
Release flow direction of the pipeline (31) along the fuel the fuel filter (14) above with the transfer pipeline (12) liquid
The connection of pressure ground, the outlet (35) for releasing valve (30) is by return line (32) and guides to the aspiration in fuel tank (17)
(11) hydraulically connect.
6. low pressure regulating system according to any one of claim 1 to 5, it is characterised in that be provided with the second control pipe
Road (37).
7. low pressure regulating system according to any one of claim 1 to 6, it is characterised in that be provided with the 3rd control pipe
Road (38).
8. releasing valve (30) with housing (41), pilot hole (42) is received in the housing, and valve is lived in the pilot hole
Plug (43) can reciprocally be directed to against the spring force of compression spring (54) and be provided with valve chamber (40), wherein, it is described
Valve piston (43) is exposed to hydraulic control room (50) with chain of command (57), wherein, the valve piston (43) is in the control room
(50) spring force when being loaded pressure against the compression spring (54) is implemented to move back and forth, and in this relief valve opening
(60), it is characterised in that the valve piston (43) has between two piston sections (47,48,61,62) with different-diameter
There is diameter mutation portion (44), the diameter mutation cage structure guiding valve seamed edge (59), the guiding valve seamed edge makes the valve opening (60)
Opened and closed towards the valve chamber (40).
9. according to claim 8 release valve (30), it is characterised in that the valve piston (43) has spring housing's side piston
Section (48) and control room side piston section (49) and it is arranged between these piston sections there is the another of small diameter
Piston section (47), the valve piston (43) is lived by the spring housing side piston section (48) and by the control room side
Plug section (49) is directed in the pilot hole (42), also, the diameter mutation portion (44) with the guiding valve seamed edge (59)
Construct in the spring housing side piston section (48) between another piston section (47) with small diameter.
10. according to claim 9 release valve (30), it is characterised in that is provided with and releases entering for pipeline (31) connection
Incoming interface (45) and the discharge interface (46) being connected with return line (32), the discharge interface (46) persistently lead to the valve chamber
(40) in and it is described enter incoming interface (45) be provided with the valve opening (60).
11. release valve (30) according to claim 9 or 10, it is characterised in that the spring housing side piston section (48)
There is identical diameter respectively with the control room side piston section (49).
12. according to claim 8 release valve (30), it is characterised in that the pilot hole (42) is embodied as shoulder hole, institute
State valve piston (43) respectively by spring housing's side piston section (61) and by be contiguous to it is on the spring housing side piston section,
Control room side piston section (62) with small diameter can be reciprocally directed in stepped pilot hole (42),
And the diameter mutation portion (44) with the guiding valve seamed edge (59) is constituted between two piston sections (61,62).
13. according to claim 12 release valve (30), it is characterised in that is provided with and releases entering for pipeline (31) connection
Incoming interface (45) and the discharge interface (46) being connected with return line (32), it is described enter incoming interface (45) persistently lead to the valve chamber
(40) in and the discharge interface (46) be provided with the valve opening (60).
14. release valve (30) according to claim 12 or 13, it is characterised in that be provided with the first bypass conduit (73) and
Second bypass conduit (74), first bypass conduit (73) from it is described enter incoming interface (45) in diverge out and by first by
Road opening (75) is led in the pilot hole (42), and second bypass conduit (74) is diverged out from the discharge interface (46)
And led to by the second bypass opening (76) in spring housing (53).
15. according to claim 14 release valve (30), it is characterised in that is added in addition to the compression spring (54)
Ground is disposed with another compression spring (71) in the control room (50), and another compression spring is against the compression spring
(54) act on and the valve piston (43) is maintained in a centre position, outlet opening (46) described in the centre position
Closed with first bypass opening (75) by the spring housing side piston section (61).
16. release valve (30) according to any one of claim 8 to 15, it is characterised in that in the valve piston (43)
Side face on be disposed with circular groove (66) between the valve chamber (40) and the control room (50), the groove by hole (67,
68) hydraulically it is connected with the spring housing (53).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014223240.6A DE102014223240A1 (en) | 2014-11-14 | 2014-11-14 | Low pressure control system of a fuel delivery system of a fuel injection system and a Absteuerventil thereto |
| DE102014223240.6 | 2014-11-14 | ||
| PCT/EP2015/075910 WO2016075041A2 (en) | 2014-11-14 | 2015-11-06 | Low-pressure automatic control system of a fuel delivery device for a fuel-injection system, and cut-off valve therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107002603A true CN107002603A (en) | 2017-08-01 |
| CN107002603B CN107002603B (en) | 2019-11-26 |
Family
ID=54476972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580061666.0A Expired - Fee Related CN107002603B (en) | 2014-11-14 | 2015-11-06 | The low pressure regulating system of the fuel delivery means of fuel injection system and valve is released for this |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107002603B (en) |
| DE (1) | DE102014223240A1 (en) |
| WO (1) | WO2016075041A2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735736A (en) * | 2018-07-18 | 2020-01-31 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels |
| CN111094736A (en) * | 2017-09-26 | 2020-05-01 | 康明斯滤清系统知识产权公司 | Return pipe of fuel filter assembly of fuel system |
| CN111566332A (en) * | 2018-01-10 | 2020-08-21 | 罗伯特·博世有限公司 | Valve assembly for gas pressure regulation, fuel system having a valve assembly for gas pressure regulation |
| US12030005B2 (en) | 2018-09-20 | 2024-07-09 | Cummins Filtration Ip, Inc. | Self sufficient suction side automatic drain valve |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201700059032A1 (en) * | 2017-05-30 | 2018-11-30 | Bosch Gmbh Robert | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
| CN109386415B (en) * | 2017-06-16 | 2022-06-03 | 罗伯特·博世有限公司 | Fuel injection system |
| DE102018200715A1 (en) * | 2018-01-17 | 2019-07-18 | Robert Bosch Gmbh | Fuel delivery device for cryogenic fuels |
| IT201800007469A1 (en) * | 2018-07-24 | 2020-01-24 | PUMPING GROUP TO FEED FUEL, PREFERABLY DIESEL, TO AN INTERNAL COMBUSTION ENGINE | |
| CN112768332B (en) * | 2019-11-05 | 2024-07-05 | 中微半导体设备(上海)股份有限公司 | Gas conveying system and semiconductor processing device |
| DE102021002128B3 (en) * | 2021-04-22 | 2022-09-29 | Daimler Truck AG | Pressure control valve for adjusting, in particular controlling, a fuel pressure and fuel system for an internal combustion engine |
| DE102021002134B3 (en) * | 2021-04-22 | 2022-09-29 | Daimler Truck AG | Fuel system for an internal combustion engine, in particular a motor vehicle, and motor vehicle with such a fuel system |
| DE102021002127B3 (en) | 2021-04-22 | 2022-09-29 | Daimler Truck AG | Fuel system for an internal combustion engine, in particular a motor vehicle, and motor vehicle with such a fuel system |
| DE102021002132B3 (en) | 2021-04-22 | 2022-09-29 | Daimler Truck AG | Pressure control valve for setting, in particular for controlling, a pressure of a fuel and a fuel system for an internal combustion engine |
| CN117738826B (en) * | 2024-02-19 | 2024-05-03 | 江苏中奕和创智能科技有限公司 | Diesel generator with oil control assembly |
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| DE19618707A1 (en) * | 1996-05-09 | 1997-11-20 | Siemens Ag | Regulating method for regulating volumetric fuel flow from feeder pump to high pressure pump in IC engine common rail fuel injection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111094736A (en) * | 2017-09-26 | 2020-05-01 | 康明斯滤清系统知识产权公司 | Return pipe of fuel filter assembly of fuel system |
| US11448173B2 (en) | 2017-09-26 | 2022-09-20 | Cummins Filtration Ip, Inc. | Return tube of a fuel filter assembly of a fuel system |
| CN111566332A (en) * | 2018-01-10 | 2020-08-21 | 罗伯特·博世有限公司 | Valve assembly for gas pressure regulation, fuel system having a valve assembly for gas pressure regulation |
| CN111566332B (en) * | 2018-01-10 | 2022-09-16 | 罗伯特·博世有限公司 | Valve assembly for gas pressure regulation, fuel system having a valve assembly for gas pressure regulation |
| CN110735736A (en) * | 2018-07-18 | 2020-01-31 | 罗伯特·博世有限公司 | Fuel delivery device for cryogenic fuels |
| US12030005B2 (en) | 2018-09-20 | 2024-07-09 | Cummins Filtration Ip, Inc. | Self sufficient suction side automatic drain valve |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014223240A1 (en) | 2016-05-19 |
| CN107002603B (en) | 2019-11-26 |
| WO2016075041A2 (en) | 2016-05-19 |
| WO2016075041A3 (en) | 2016-07-07 |
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