WO2014001129A1 - Pompe à carburant haute pression destinée à un système de carburant d'un moteur à combustion interne - Google Patents

Pompe à carburant haute pression destinée à un système de carburant d'un moteur à combustion interne Download PDF

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Publication number
WO2014001129A1
WO2014001129A1 PCT/EP2013/062531 EP2013062531W WO2014001129A1 WO 2014001129 A1 WO2014001129 A1 WO 2014001129A1 EP 2013062531 W EP2013062531 W EP 2013062531W WO 2014001129 A1 WO2014001129 A1 WO 2014001129A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure fuel
pump
pump housing
vibration
fuel pump
Prior art date
Application number
PCT/EP2013/062531
Other languages
German (de)
English (en)
Inventor
Jan Herrmann
Matthias Maess
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to KR20147036280A priority Critical patent/KR20150023480A/ko
Priority to CN201380033995.5A priority patent/CN104428526B/zh
Publication of WO2014001129A1 publication Critical patent/WO2014001129A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—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
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

  • the invention relates to a high-pressure fuel pump according to the preamble of claim 1.
  • High-pressure fuel pumps are known as part of the market
  • Fuel system for an internal combustion engine is designed as Ansteckpumpen. Due to the stroke of a piston in a pump housing, fuel is compressed in a delivery chamber and conveyed into a high-pressure accumulator ("rail"). In the high-pressure fuel pump arise due to the promotion and the flow control in one
  • MSV Quantity control valve
  • Attaching portion of the internal combustion engine for example, to a cylinder head. Apart from an undesirable operating noise, a comparatively high vibration load can arise, which can reduce the fatigue strength of the high-pressure fuel pump and in the worst case leads to permanent failure.
  • the invention has the advantage that a transmission of structure-borne noise from the high-pressure fuel pump to a mounting portion by means of a vibration-decoupling means is particularly efficiently reduced, whereby less noise is radiated into the environment. Furthermore you can
  • Vibrations of the high-pressure fuel pump can be reduced, whereby a direct sound radiation from surfaces of the high-pressure fuel pump is reduced.
  • a transmission of structure-borne noise can be reduced from the attachment portion to the high-pressure fuel pump, whereby, for example, contacting the high-pressure fuel pump
  • Plug device is less burdened by vibrations. Likewise, by the comparatively and usually poor thermal conductivity of the
  • vibration decoupling means a heat transfer from the
  • Attachment section are reduced to the high-pressure fuel pump. Thereby, a thermal load of the high-pressure fuel pump can be reduced, wherein plastic components of the high-pressure fuel pump or a quantity control valve and the fuel therein are heated less.
  • Fuel pump allows a "fully elastic isolation" of the high-pressure fuel pump between a pump housing or a
  • the invention relates to a high-pressure fuel pump for a
  • Fastening device with which the pump housing is fastened at least indirectly to a mounting portion of the internal combustion engine, and with a vibration-decoupling means, which is arranged in the installed position in the load path between the pump housing and mounting portion.
  • the fastening device has a rigid
  • Attachment portion is connected, wherein the vibration-decoupling means is arranged in the installed position at least partially between the intermediate portion and the mounting portion, and wherein the pump housing is held in the vibration-decoupling means.
  • Vibration decoupling means preferably comprises an elastomeric material or an elastomeric element, and depending on a respective embodiment, may also be designed as a composite of at least one elastomeric element and at least one other element (for example a sheet metal), for example in a layered construction.
  • the high pressure fuel pump can be maintained in a particularly defined manner at the mounting portion.
  • mounting screws required for fastening can be arranged on the attachment portion such that the vibration-decoupling
  • Means is not squeezed in an inadmissible manner as a result of the screw force, namely by the intermediate section on block with the
  • compression limiter which in installed position between a head of the
  • the mounting screw and the mounting portion is clamped.
  • the mounting screw can thus be screwed to the mounting portion in a defined and independent of the characteristics of the vibration-decoupling means independent manner.
  • Fastening device can be increased.
  • the shank of the mounting screw is at least partially enclosed by the spacer sleeve.
  • the spacer sleeve in turn is guided at least partially through a bore of a radially outer portion of the high-pressure fuel pump designed as a fastening flange.
  • the vibration decoupling agent is in a force path between the high-pressure fuel pump or the
  • Mounting flange and the mounting portion arranged such that there is the vibration-isolating or vibration-isolating effect according to the invention.
  • T-shaped spacer sleeve Longitudinal section is T-shaped.
  • An "upper" and transverse portion of the T-shaped spacer sleeve forms the intermediate portion and allows a relatively large surface support for the head of the mounting screw.
  • This can be a
  • a further embodiment of the fastening device provides that it comprises a mounting screw and the intermediate portion comprises a mounting flange for the pump housing, which in the installed position between a head of
  • the vibration decoupling means is not in the force path of
  • the fastening device in this embodiment does not comprise a spacer sleeve, and yet on the one hand the
  • Mounting flange defined to be arranged on the mounting portion, and on the other hand, the vibration decoupling means according to the invention Act. Costs can be reduced.
  • the mounting flange is a separate element and in particular not rigidly coupled or connected to the high-pressure fuel pump. The mounting flange is so to speak "from above” indirectly and with the interposition of the vibration-decoupling means against a radially outer housing paragraph of the high-pressure fuel pump through the force of Montagesch robbery (n) pressed.
  • the fastening device comprises at least one mounting screw and a rigid intermediate portion, wherein the rigid intermediate portion in turn comprises at least one mounting flange and - depending on the particular embodiment of the invention - at least one spacer sleeve.
  • the mounting flange is Z-shaped in cross-section, wherein it in the plan view in general
  • Attachment section so be arranged to be in contact, and an "upper" portion of the mounting flange can be "indirectly”, namely using the vibration decoupling means, be arranged on the high-pressure fuel pump or a radially outer housing paragraph of the high-pressure fuel pump. Due to the Z-shaped cross-section of the
  • the fastening device according to the invention can be carried out in a particularly diverse manner and adapted to a respective geometry of the high pressure fuel pump and / or the attachment portion.
  • vibration decoupling means in two parts with a first part, which between the intermediate portion and the pump housing
  • This "element” is, for example, a radially outer section of the high-pressure section designed as a fastening flange or as a housing shoulder. Fuel pump. Due to the two-part design of the
  • vibration-decoupling means are particularly many structural design options of the fastening device according to the invention. Furthermore, it can be provided that the vibration-decoupling means comprises a portion which in the installed position radially between the
  • the vibration decoupling effect includes all three spatial directions.
  • a further embodiment of the fastening device provides that the pump housing and / or the radially outer housing paragraph of
  • Ring groove has the task of receiving the second part of the vibration-decoupling agent and to guide radially. This can do that
  • vibration decoupling means be particularly precisely arranged on the pump housing.
  • Figure 1 is a schematic diagram of a fuel system of an internal combustion engine with a high-pressure fuel pump
  • Figure 2 is a perspective view of the high-pressure fuel pump of Figure 1;
  • Figure 3 shows a first embodiment of an inventive
  • FIG. 4 shows the fastening device of FIG. 3 after assembly
  • Figure 5 shows a second embodiment of the invention
  • FIG. 6 shows a third embodiment of the invention
  • FIG. 7 shows a fourth embodiment of the invention
  • a fuel system for an internal combustion engine carries in FIG. 1 as a whole the reference numeral 10. It comprises a fuel tank 12, from which a
  • Pre-feed pump 14 promotes fuel in a low-pressure line 16.
  • the pressure in the low pressure line 16 is controlled by a pressure control or
  • Pressure control valve 18 is set.
  • the low pressure line 16 leads to a high pressure fuel pump 20, the structure of which is described in more detail in FIG.
  • the high pressure fuel pump 20 is mechanically driven by the engine 10. It compresses the fuel to a very high pressure and conveys it to a high pressure fuel accumulator 22, also referred to as a "rail".
  • a high pressure fuel accumulator 22 also referred to as a "rail”.
  • injectors 24 are connected, which inject the fuel under high pressure in them directly associated combustion chambers 26 of the internal combustion engine.
  • the operation of the fuel system 10 is controlled by a control and
  • Control device 28 controlled and regulated.
  • the high pressure fuel pump 20 is configured as a radial piston pump and has a pump housing 32. On the pump housing 32, a pump cover 34 is arranged. In a region pointing rearwardly in FIG. 2, a quantity control valve 36 is arranged.
  • the pump housing 32 is connected via a mounting flange 38 on the internal combustion engine 10 shown in Figure 1 via mounting screws 64 (not shown in Figure 2, see Figure 3) to a designated mounting portion 56 (not shown in Figure 2, see Figure 3) of the internal combustion engine 10th attached.
  • the mounting flange 38 is rigidly connected to the pump housing 32 - for example, pressed or welded or caulked - and has holes 39 for inserting the mounting screws 64. From the pump housing 32 projects a pump piston 40 for mechanical drive of the high-pressure fuel pump 20 out, which is surrounded by a piston spring 42.
  • the middle connection in FIG. 2 is formed by a low-pressure connecting piece 44, which differs from that shown in FIG.
  • Pre-feed pump 14 is fed and to a low pressure region of the
  • High pressure fuel pump 20 leads.
  • the connection shown on the left in FIG. 2 is formed by a high-pressure connection piece 46, which is assigned to a high-pressure region of the high-pressure fuel pump 20 and feeds the high-pressure fuel accumulator 22 (FIG. 1).
  • the connection shown on the right-hand side in FIG. 2 is formed by a connecting piece 48, which feeds leakage fuel from the high-pressure fuel pump 20 into the fuel tank 12 (FIG. 1). Above all, the latter nozzle 48 is a special case and not available on all pump housings.
  • the high-pressure fuel pump 20 is designed as a clip-on pump, which is plugged into a corresponding opening in the engine housing (for example, cylinder head cover, not shown) of the internal combustion engine 10.
  • the pump piston 40 seated radially on a cam or balance shaft is then set in a reciprocating motion.
  • the piston stroke of the fuel in a pumping chamber (not visible) is compressed and conveyed to the high pressure port 46.
  • the pump sits relatively stiff in and on the motor housing ("mounting portion 56").
  • mounting portion 56 In the high-pressure fuel pump 20 occurs due to the cyclic
  • the mounting flange 38 forms - without
  • Countermeasures - with the attachment portion 56 of the internal combustion engine 10 a transitional region, is transferred to the engine noise 10 via the structure-borne sound in the form of vibrations from the internal combustion engine 10 to the high-pressure fuel pump 20 and body and fluid sound in the form of vibrations from the high-pressure fuel pump 20.
  • Vibrations are - without countermeasures - especially on the
  • vibration decoupling means 70 for reducing the transmission of sound between the mounting flange 38 and the
  • Attachment portion 56 (see Figure 3) of the internal combustion engine 10 is used, as will now be explained in detail.
  • FIG. 3 shows a first embodiment of a fastening device 60 for the high-pressure fuel pump 20 in a schematic sectional view.
  • a vertical dotted line 62a in the left portion of the drawing and a vertical dotted line 62b in the central region of the drawing indicate an at least partial rotational symmetry of the arrangement shown in Figure 3 or the elements shown.
  • the fastening device 60 enables an indirect attachment of the pump housing 32 to the mounting portion 56 of the internal combustion engine 10.
  • the fastening device 60 the already mentioned
  • mounting screw 64 a mounting sleeve 68 and formed on this annular disc-shaped intermediate portion 66.
  • mounting screw 64, a mounting sleeve 68 and formed on this annular disc-shaped intermediate portion 66 is the present case.
  • Mounting flange 38 rigidly connected to the pump housing 32, or the mounting flange 38 is designed as a radially outer portion of the pump housing 32. But it could also be an initially separate part, which is welded to the pump housing 32, pressed or caulked or otherwise firmly connected.
  • the spacer sleeve 68 is partially disposed in the bore 39 of the mounting flange 38 and is formed due to the intermediate portion 66 in longitudinal section T-shaped.
  • a first part 70a of the vibration decoupling means 70 has the shape of a 90 ° angle in cross section.
  • a vertically extending leg in Figure 3 is arranged in the installed position radially between the intermediate portion 66 and the mounting flange 38 and the pump housing 32, a horizontally extending leg in Figure 3 is axially in the installed position between the intermediate member 66 and the
  • Mounting flange 38 is arranged.
  • a second portion 70b extending horizontally in FIG. 3 is arranged substantially flat between the pump housing 32 and the mounting flange 38 on the one hand and the mounting portion 56 on the other hand.
  • the vibration decoupling means 70a and 70b comprise in the present case an elastomeric material, whereby a significant vibration decoupling is made possible in the operation of the high-pressure fuel pump 20 installed according to FIG.
  • the vibration decoupling means 70a is in the present case designed with a substantially annular geometry, wherein the horizontally extending leg constitutes a radially extending collar.
  • Mounting flange 38 axially and radially spaced.
  • Vibration decoupling means 70b is in this case also substantially designed as an annular disc, which axially spaced the mounting flange 38 and a radially outer portion of the pump housing 32 of the attachment portion 56.
  • Vibration decoupling means 70b is in this case also substantially designed as an annular disc, which axially spaced the mounting flange 38 and a radially outer portion of the pump housing 32 of the attachment portion 56.
  • Section of the spacer sleeve 68 touch the vibration decoupling means 70a and 70b each other.
  • the fastening device 60 comprises a designed as an O-ring seal 72 which radially between a lower portion in the drawing of the pump housing 32 and the
  • Attachment section 56 is arranged.
  • the fastening device 60 according to FIG. 3 acts essentially as follows:
  • the mounting screw 64 is provided with a predetermined torque
  • vibration-decoupling means 70a and 70b acted upon by a respective pressure. After tightening the mounting screw 64 is the
  • Spacer sleeve 68 with a lower end portion in the drawing on the attachment portion 56, so with the attachment portion "on block".
  • vibration decoupling means 70 arranged. However, at least one of the vibration decoupling means 70a and 70b is disposed throughout the force path between the pump housing 32 and the mounting flange 38 on the one hand and the mounting portion 56 on the other hand.
  • Pump housing 32 is thus on the mounting flange 38 in the
  • vibration decoupling means 70 namely between the horizontal leg in the figure of the part 70a and the part 70b held.
  • FIG. 5 shows a second embodiment of the fastening device 60.
  • the fastening flange 38 is designed as a separate annular element and is therefore not rigidly connected to the pump housing 32 as in FIGS. 2 to 4. Instead of an annular configuration would also be a
  • the fastening flange 38 is Z-shaped in cross-section, with a leg 38a, which is lower in the drawing and horizontal in the figure, and an upper leg 66 which is horizontal in the figure and in the present case forms the intermediate section.
  • Mounting flange 38 is in the installation position shown with its lower
  • the pump housing 32 of FIG. 5 has a substantially annular housing shoulder 74.
  • vibration-decoupling means 70 is in the figure 5 axially between the pump housing 32 and the housing shoulder 74 on the one hand, and the
  • Attachment section 56 on the other hand, arranged.
  • the fastening device 60 acts essentially as follows: A head section of the mounting screw 64 acts on and presses the lower section 38a of the fastening flange 38
  • the mounting flange 38 is rigid and non-vibrationally disposed on the mounting portion 56.
  • the part 70b of the vibration-decoupling means 70 is arranged.
  • the O-ring seal 72 is disposed radially between the lower portion of the pump housing 32 and the attachment portion 56 in the drawing.
  • the Z-shaped part 70a is in two pieces as two L-shaped parts (not shown) executed. The resulting
  • Vibration decoupling effect is comparable to the "one-piece" embodiment.
  • FIG. 6 shows the fastening flange 38 according to FIG. 5, wherein in FIG. 6 the fastening flange 38 is permanently connected to the first part 70a of FIG
  • Embodiment of the fastening device 60 according to the invention can be done for example by gluing, vulcanization or the like.
  • FIG. 7 shows a fourth embodiment of the invention
  • the second part 70b of the vibration-decoupling means 70 is partially arranged in FIG. 7 in an annular groove 76 formed on the pump housing 32 and the housing shoulder 74.
  • the fixing device 60 of FIG. 7 corresponds to that of FIG. 5.
  • the annular groove 76 has the function of receiving and radially guiding the second part 70b of the vibration-decoupling means 70.
  • the vibration decoupling means 70 or the parts 70a and / or 70b can be embodied in various ways.
  • the vibration decoupling means 70 may be a sheet-like elastomer (viscoelastic layer).
  • the vibration decoupling means 70 may also have more than two sheets and thus more than one viscoelastic layer.

Abstract

L'invention décrit une pompe à carburant haute pression (20) destinée à un système à carburant pour un moteur à combustion interne (10). Cette pompe comprend un carter de pompe (32) et un dispositif de fixation (60) par lequel le carter de pompe (32) peut être fixé au moins indirectement sur une section de montage (56) du moteur à combustion interne (10). La pompe comprend également un moyen de découplage des vibrations (70) qui est agencé en position de montage sur le trajet de charge entre le carter de pompe (32) et la section de montage (56). Selon l'invention, le dispositif de fixation (60) présente une section intermédiaire rigide (66) qui, en position de montage à bloc, est reliée avec la section de montage (56). Le moyen de découplage des vibrations (70) est disposé en position de montage au moins partiellement entre la section intermédiaire (66) et la section de montage (56), le carter de pompe (32) étant maintenu dans le moyen de découplage des vibrations (70).
PCT/EP2013/062531 2012-06-28 2013-06-17 Pompe à carburant haute pression destinée à un système de carburant d'un moteur à combustion interne WO2014001129A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR20147036280A KR20150023480A (ko) 2012-06-28 2013-06-17 내연기관의 연료 시스템용 고압 연료 펌프
CN201380033995.5A CN104428526B (zh) 2012-06-28 2013-06-17 用于内燃机的燃料系统的高压燃料泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012211104.2 2012-06-28
DE102012211104.2A DE102012211104A1 (de) 2012-06-28 2012-06-28 Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2014001129A1 true WO2014001129A1 (fr) 2014-01-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/062531 WO2014001129A1 (fr) 2012-06-28 2013-06-17 Pompe à carburant haute pression destinée à un système de carburant d'un moteur à combustion interne

Country Status (4)

Country Link
KR (1) KR20150023480A (fr)
CN (1) CN104428526B (fr)
DE (1) DE102012211104A1 (fr)
WO (1) WO2014001129A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113982795A (zh) * 2021-10-19 2022-01-28 建新赵氏科技有限公司 一种发动机燃油泵护板总成

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015210795B4 (de) * 2015-06-12 2024-01-04 Vitesco Technologies GmbH Kraftstoffhochdruckpumpe
GB2539969A (en) * 2015-07-03 2017-01-04 Gm Global Tech Operations Llc Fuel unit pump for an internal combustion engine
DE102016213451A1 (de) * 2016-05-19 2017-11-23 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe
EP3615804B1 (fr) * 2017-04-24 2023-11-15 Volvo Truck Corporation Unité de génération de puissance
DE102018216582A1 (de) * 2018-09-27 2020-04-02 Continental Automotive Gmbh Pumpenanordnung für eine Brennkraftmaschine
JP7180573B2 (ja) * 2019-09-20 2022-11-30 いすゞ自動車株式会社 インジェクタ取付構造

Citations (5)

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Publication number Priority date Publication date Assignee Title
FR2153961A5 (fr) * 1971-09-18 1973-05-04 Bosch
EP0633404A1 (fr) * 1993-07-06 1995-01-11 Scania Cv Aktiebolag Dispositif pour compenser l'erreur de positionnement d'un equipement auxiliaire sur un moteur à combustion interne
US5626121A (en) * 1994-12-02 1997-05-06 Zexel Corporation Fuel pump for high-pressure fuel injection system
DE102005007807A1 (de) * 2004-12-28 2006-07-06 Robert Bosch Gmbh Haltevorrichtung, durch die ein Befestigungselement vor der Montage eines Werkstücks in einer Durchgangsöffnung des Werkstücks zur Aufbewahrung gehalten werden kann, sowie Hochdruck-Kraftstoffpumpe mit einer solchen Haltevorrichtung
DE102008042626A1 (de) 2008-05-29 2009-12-03 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe

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JPH08114163A (ja) * 1994-10-14 1996-05-07 Toyota Autom Loom Works Ltd インシュレータ
US5513603A (en) * 1995-08-11 1996-05-07 Chrysler Corporation Seal and fastener isolator system for a valve cover
JP4304820B2 (ja) * 2000-03-28 2009-07-29 アイシン精機株式会社 エンジンの高圧燃料ポンプの取付構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2153961A5 (fr) * 1971-09-18 1973-05-04 Bosch
EP0633404A1 (fr) * 1993-07-06 1995-01-11 Scania Cv Aktiebolag Dispositif pour compenser l'erreur de positionnement d'un equipement auxiliaire sur un moteur à combustion interne
US5626121A (en) * 1994-12-02 1997-05-06 Zexel Corporation Fuel pump for high-pressure fuel injection system
DE102005007807A1 (de) * 2004-12-28 2006-07-06 Robert Bosch Gmbh Haltevorrichtung, durch die ein Befestigungselement vor der Montage eines Werkstücks in einer Durchgangsöffnung des Werkstücks zur Aufbewahrung gehalten werden kann, sowie Hochdruck-Kraftstoffpumpe mit einer solchen Haltevorrichtung
DE102008042626A1 (de) 2008-05-29 2009-12-03 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113982795A (zh) * 2021-10-19 2022-01-28 建新赵氏科技有限公司 一种发动机燃油泵护板总成

Also Published As

Publication number Publication date
DE102012211104A1 (de) 2014-01-02
CN104428526B (zh) 2018-10-19
KR20150023480A (ko) 2015-03-05
CN104428526A (zh) 2015-03-18

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