CN109790807A - Restricting element, particularly for the restricting element of high-pressure pump, the restricting element of the low tension loop of especially fuel injection system - Google Patents

Restricting element, particularly for the restricting element of high-pressure pump, the restricting element of the low tension loop of especially fuel injection system Download PDF

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Publication number
CN109790807A
CN109790807A CN201780061768.1A CN201780061768A CN109790807A CN 109790807 A CN109790807 A CN 109790807A CN 201780061768 A CN201780061768 A CN 201780061768A CN 109790807 A CN109790807 A CN 109790807A
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CN
China
Prior art keywords
restricting element
hole
pressure pump
injection system
valve seat
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
Application number
CN201780061768.1A
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Chinese (zh)
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CN109790807B (en
Inventor
H·艾泽勒
P·塞尔韦斯特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of CN109790807A publication Critical patent/CN109790807A/en
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Publication of CN109790807B publication Critical patent/CN109790807B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—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
    • 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
    • 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
    • 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
    • F02M55/007—Venting means
    • 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
    • F02M59/447—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 means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
    • 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
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • F02M59/485—Means for fixing delivery valve casing and barrel to each other or to pump casing
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention relates to a kind of restricting element (1), particularly for fuel injection system, the restricting element of the low tension loop of especially common-rail injection system, the restricting element includes body (2), the body has the hole (3) for being embodied as axial hole, and the throttle orifice (4) for being configured to radial hole leads in the hole.According to the present invention, check-valves (5) is integrated into the hole (3), the check-valves include at least one valve seat (6,7) and with the coefficient closing element (8) of the valve seat (6,7).The invention further relates to it is a kind of for fuel injection system, especially common-rail injection system, high-pressure pump with such restricting element and low tension loop.

Description

Restricting element, particularly for the restricting element of high-pressure pump, especially fuel injection system The restricting element of low tension loop
Technical field
The present invention relates to a kind of restricting element with claim 1 preamble feature, the restricting element particularly for The low tension loop of fuel injection system, especially common-rail injection system.Moreover, it relates to such restricting element High-pressure pump and low tension loop, the restricting element is particularly for constituting zero conveying throttling set.
Background technique
It is known from the state of the art a kind of restricting element, the low pressure which can be presented to fuel injection system is returned In the fuel channel on road and for constituting zero conveying throttling set.Such restricting element is for example by DE 10 2,009 001 564 A1 are known.
It is used to be discharged the leakage rate of metering units in the restricting element illustrated in 10 2,009 001 564 A1 of DE, it should The amount of being used for is adjusted before metering units are connected to high-pressure fuel pump.If not conveyed in zero conveying operation by high-pressure pump The leakage rate occurred via metering units must be then discharged in amount.Restricting element undertakes the task, for this purpose, the restricting element has There is the body that can be placed in a manner of throttling to the fuel stream flowed through in main flow direction in fuel channel.In the body In be provided at least one throttling opening, the throttling opening be embodied as radial hole and will around the body annular space and institute State the longitudinal hole connection of body.Therefore, throttling opening is met stream from radially outer.Particle enters in order to prevent, is embodied as clearance-type The filter device of filter is located at before throttling opening.Because restricting element is according to pressure condition not only in main flow direction And also flowed through in the opposite direction when necessary, so being provided with another filter dress on the other end of restricting element It sets.
Summary of the invention
From the above-mentioned prior art, the task that the present invention is based on is to provide a kind of restricting element, particularly for fuel The low tension loop of spraying system, the restricting element have high functional safety and can also the manufactures of simple and cost low land.
The task is solved by the restricting element with claim 1 feature.This hair is provided in the dependent claims Bright advantageous extension scheme.In addition, proposing that there is the high-pressure pump of such restricting element and low tension loop.
Be preferred for low tension loop, especially fuel injection system, especially common-rail injection system low tension loop throttling member Part includes that advantageous cross sections are circular bodies, which has the hole for being embodied as axial hole, and the throttle orifice for being configured to radial hole leads to In the hole.The hole is especially configured to the centre bore of the longitudinal axis along substantially cylindrical body.According to the present invention, check-valves collection At into restricting element, the check-valves include at least one valve seat and with the coefficient closing element of the valve seat.This is integrated Check-valves guarantee, restricting element as zero conveying throttling set be presented in the low tension loop of fuel injection system when, The restricting element is only flowed through in one direction.In this way, particle caused by the fuel by reflux is safely prevented It brings into.Therefore, additional filter device and/or additional check-valves are not needed in the return line of low tension loop.
The quantity of component needed for being reduced by the way that the function of being proposed is integrated.Therefore manufacture and assembly cost are reduced.Furthermore Reduce installation space demand.In addition, restricting element has high functional safety when check-valves is configured to double-beat drop valve.Cause Minimum can be reduced to for the loss amount in high-pressure delivery.The efficiency of high-pressure pump is improved simultaneously.
Preferably, closing element is loaded towards the direction of the first valve seat by the spring force of spring.Pass through the spring force energy of spring The opening pressure of enough predetermined check-valves.Preferably, when the pressure rise in the inflow region in high-pressure pump is more than predetermined When limiting value, check-valves overcomes the spring force of spring to open.
Advantageously, the first valve seat is made of the convex shoulder of the restricting element body in hole.For this purpose, the hole is preferably implemented as rank Terraced hole.Alternatively or additionally, the hole can at least section taper extend ground construction, for example to constitute the valve seat of taper.
It is preferably configured as spherical shape with the coefficient closing element of at least one valve seat, so that passing through circular seal line Generate seal receptacle.Big sealing force may be implemented in this way.Guarantee closing element about valve seat from centering simultaneously.
Further preferably, closing element and another valve seat collective effect, to keep the loss amount in high-pressure delivery minimum Change or prevents from forming loss amount.Another valve seat is opposed with the first valve seat, so that closing element can take up two valve seats Between position, for leakage rate to be discharged.When pressure condition variation, closing element can stick on first or second valve seat On, so as to prevent fuel or flow back into inflow region or from inflow region flow out.
A preferred embodiment according to the present invention, another valve seat are made of sleeve, which is placed in, especially It is pressed into the hole of the body of restricting element.In this way it is possible to which simple and cost low land realizes another valve seat.
Moreover, it is proposed that the sleeve for constructing another valve seat has annular flange.The annular flange can be used for Support spring, by the spring force of the spring, closing element is pre-tightened towards the direction of the first valve seat.If sleeve is pressed into described In the hole of body, then the spring force of spring can be adjusted by compression distance.
In order to prevent the throttle orifice of restricting element from being bypassed, propose, the hole constructed in the body is embodied as blind hole, saves Discharge orifice leads in the hole.I.e. the body of restricting element is embodied as closure or solid at least one section.The section is located at Before throttle orifice, so that the section can be used for limit annular gap simultaneously, which is constituted before being located at throttle orifice Clearance-type filter.
Throttle orifice itself is preferably placed in the contraction region of the peripheral side of the body.The contraction flow region causes in throttle orifice Annular space is formed before, and leakage rate to be discharged can be built up in the annular space.
It is generated when because restricting element according to the present invention is especially in the low tension loop for being used in fuel injection system Advantage, so also proposed a kind of for fuel injection system, the low tension loop of especially common-rail injection system, low tension loop tool There is such restricting element, for constituting zero conveying throttling set.For this purpose, restricting element is placed into, is especially pressed into low pressure time In the fuel channel on road.Because screw thread need not be cut out, it is possible to which extremely simple and cost low land realizes press-fitting connection.
Preferably, receive restricting element fuel channel construct in the housing parts of high-pressure pump, in particular by with Under type: fuel channel can be connected in the reflux portion of low tension loop via restricting element.Therefore, it is discharged via restricting element Retain within the system to the leakage rate in reflux portion, thus further improves the efficiency of system.
Moreover, it is proposed that the body of restricting element limit annular space in fuel channel, the annular space via throttle orifice with Aforementioned apertures connection.In this case, fluid flows to throttle orifice via annular space.If the annular space is configured between annular Gap then can be realized simultaneously filter function.
Detailed description of the invention
The preferred embodiment of the present invention is set forth below according to attached drawing.Attached drawing is shown:
The schematic representation of Fig. 1 fuel injection system,
The schematical longitudinal section of according to the present invention restricting element of the Fig. 2 in close stance state,
The restricting element of the Fig. 1 of Fig. 3 in open position state, and
The restricting element of the Fig. 1 of Fig. 4 in another close stance state.
Specific embodiment
It include delivery pump 100 according to the fuel injection system 1 of Fig. 1, which sucks fuel 101 from tank 102 And it is filtered by main filter 103 and is transported to high-pressure pump 104.Here, fuel 101 flows through the low tension loop of high-pressure pump 104 105 (low tension loop is also only symbolically shown herein) and it is subsequently supplied to metering units 106.The metering units 106 carry out dosage to fuel quantity corresponding to demand required by internal combustion engine, and by thus set fuel quantity via supply Pipeline 107 is transported to the high tension loop 108 of high-pressure pump 104.Then, the fuel supplied is pushed back in height in commonly known fashion Only pressure accumlator 109 shown partially herein is compressed and be subsequently led in road 108, is mentioned from the pressure accumlator Fuel 101 under high pressure is taken, for running internal combustion engine.
In addition, the low tension loop 105 of high-pressure pump 104 is connect via reflux portion 110 with tank 102 so that due to Leakage loss in the transmission mechanism compartment of high-pressure pump 104 and the excess of fuel in the accumulation of area of low pressure side can be flowed via the path It returns in tank 102.
By the excess of fuel that is not handled provided by metering units 106 but by high-pressure pump 104 also by another reflux portion 111 return to tank 102 via the restricting element 1 for being used as zero conveying throttling set.Restricting element 1 is it is so structured that independent Component or be configured to the component part of high-pressure pump 104.
It include cylindrical body 2 in restricting element 1 shown in Fig. 2.The body 2 has in end section 18 relative to height The press-fit interference of the fuel channel 14 of the housing parts 15 of press pump, according to this embodiment, restricting element 1 is pressed directly into described In fuel channel.The press-fit is simultaneously by the close positioned at the inflow region of 1 upstream of restricting element and reflux portion 16 of fuel channel 14 Envelope.
The body 2 has contraction flow region 13 in the middle region, forms annular sky in fuel channel 14 by the contraction flow region Between 17.In the region of contraction flow region 13, the throttle orifice 4 for being embodied as radial hole is configured in the body 2, annular space 17 passes through The throttle orifice is connect with the hole 3 for being embodied as radial hole of body 2.In order to make deleterious particle far from throttle orifice 4, annular gap 19 is located at Before annular space 17, the annular gap constitutes clearance-type filter.
In order to guarantee that restricting element 1 is only flowed through towards the direction in reflux portion 16 in one direction, specifically, check-valves 5 are integrated into restricting element 1.The check-valves includes spherical closing element 8, the closing element can two valve seats 6,7 it Between be received in moving back and forth in the hole 3 of body 2.Spring 9 is supported on closing element 8, the spring by closing element be pressed against by The first valve seat 6 that convex shoulder 10 in hole 3 is constituted pre-tightens.When the pressure in reflux portion 16 approximatively corresponds in inflow region When pressure, spring 9 keeps check-valves 5 to close.Guarantee in this way, fuel does not return in inflow region from reflux portion 16.
In order to which fuel is discharged in reflux portion 16 from inflow region, it is necessary to the spring force of spring 9 be overcome to open check-valves 5.When the pressure in inflow region reaches predetermined limiting value, so that closing element 8 overcomes the spring force of spring 9 from valve seat 6 On when lifting, be such case (referring to Fig. 3).
When pressure in inflow region further increases, closing element 8 is sticked on another valve seat 7, another valve Seat is made of (referring to fig. 4) the sleeve 11 in the hole 3 for being pressed into body 2.Sleeve 11 has annular flange 12, and spring 9 is supported on this In annular flange.

Claims (12)

1. a kind of restricting element (1), particularly for fuel injection system, the throttling member of the low tension loop of especially common-rail injection system Part, the restricting element include body (2), which has the hole (3) for being embodied as axial hole, be configured to the throttle orifice (4) of radial hole Lead in the hole, which is characterized in that check-valves (5) is integrated into the hole (3), and the check-valves includes at least one valve seat (6,7) and with the coefficient closing element (8) of the valve seat (6,7).
2. restricting element (1) according to claim 1,
It is characterized in that, the closing element (8) is loaded towards the direction of the first valve seat (6) by the spring force of spring (9), wherein First valve seat (6) is preferably made of the convex shoulder (10) of the body (2) in the hole (3).
3. restricting element (1) according to claim 1 or 2,
It is characterized in that, closing element (8) is configured to spherical shape.
4. restricting element (1) according to any one of the preceding claims,
It is characterized in that, the closing element (8) and another valve seat (7) collective effect, another valve seat is preferably by merging, outstanding It is pressed into the composition of the sleeve (11) in the hole (3).
5. restricting element (1) according to claim 4,
It is characterized in that, the sleeve (11) has annular flange (12), the spring (9) is preferably supported at the annular flange On.
6. restricting element (1) according to any one of the preceding claims,
It is characterized in that, the hole (3) is embodied as blind hole.
7. the restricting element according to one of preceding claims (1),
It is characterized in that, the throttle orifice (4) is arranged in the region of the contraction flow region (13) of the peripheral side of the body (2).
8. a kind of high-pressure pump, particularly for fuel injection system, the high-pressure pump of especially common-rail injection system, the high-pressure pump has Restricting element (1) according to any one of the preceding claims.
9. high-pressure pump according to claim 8,
It is characterized in that, the restricting element (1) is placed in, is especially pressed into the fuel channel (14) of the high-pressure pump (104), For constituting zero conveying throttling set.
10. high-pressure pump according to claim 8,
It is characterized in that, the fuel channel (14) construction is in the housing parts (15) of high-pressure pump (104) and can be via The restricting element (1) is connected in the reflux portion (16) of the low tension loop.
11. the high-pressure pump according to any one of claim 8 to 10,
It is characterized in that, the body (2) is in the interior limit annular space (17) of fuel channel (14), the annular space is via described Throttle orifice (4) is connect with the hole (3).
12. the low tension loop of a kind of fuel injection system, especially common-rail injection system, the low tension loop has according to aforementioned power Benefit require any one of 1 to 7 described in restricting element (1).
CN201780061768.1A 2016-10-07 2017-09-22 Throttling element, high-pressure pump, low-pressure circuit of fuel injection system Active CN109790807B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016219486.0A DE102016219486A1 (en) 2016-10-07 2016-10-07 Throttling element, in particular for a high pressure pump, in particular a low pressure circuit of a fuel injection system
DE102016219486.0 2016-10-07
PCT/EP2017/073991 WO2018065235A1 (en) 2016-10-07 2017-09-22 Throttle element, in particular for a high-pressure pump, in particular of a low-pressure circuit of a fuel injection system

Publications (2)

Publication Number Publication Date
CN109790807A true CN109790807A (en) 2019-05-21
CN109790807B CN109790807B (en) 2021-07-06

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CN201780061768.1A Active CN109790807B (en) 2016-10-07 2017-09-22 Throttling element, high-pressure pump, low-pressure circuit of fuel injection system

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KR (1) KR20190057365A (en)
CN (1) CN109790807B (en)
DE (1) DE102016219486A1 (en)
WO (1) WO2018065235A1 (en)

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US11339688B2 (en) 2020-01-29 2022-05-24 Borgwarner, Inc. Variable camshaft timing valve assembly

Citations (8)

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