WO2020090371A1 - Pompe à carburant - Google Patents

Pompe à carburant Download PDF

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Publication number
WO2020090371A1
WO2020090371A1 PCT/JP2019/039577 JP2019039577W WO2020090371A1 WO 2020090371 A1 WO2020090371 A1 WO 2020090371A1 JP 2019039577 W JP2019039577 W JP 2019039577W WO 2020090371 A1 WO2020090371 A1 WO 2020090371A1
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WO
WIPO (PCT)
Prior art keywords
fuel pump
end surface
coil
fuel
axially outer
Prior art date
Application number
PCT/JP2019/039577
Other languages
English (en)
Japanese (ja)
Inventor
雅史 根本
悟史 臼井
斉藤　淳治
Original Assignee
日立オートモティブシステムズ株式会社
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 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2020553715A priority Critical patent/JP7110384B2/ja
Publication of WO2020090371A1 publication Critical patent/WO2020090371A1/fr

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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
    • 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
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • 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

Definitions

  • the present invention relates to vehicle parts, and more particularly to a fuel pump that supplies high pressure fuel to an engine.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2018-087548
  • Patent Document 1 "High-pressure provided with an intake valve mechanism 300 having an intake valve 30 for opening and closing a flow path on the upstream side of the pressurizing chamber 11 and an electromagnetic coil 43 for controlling the opening and closing of the intake valve 30.
  • a groove 39c formed in the intake valve mechanism 300, and a fixing member (annular member 47) for fixing the yoke (second yoke 44) constituting the magnetic circuit by being inserted and fixed in the groove 39c. was disclosed. ”(See summary).
  • the fuel pump is installed in a narrow space inside the engine, so it is desirable to be as small as possible.
  • the suction valve mechanism 300 is a mechanism that is inserted into the pump body from the outside in the radial direction, and is a mechanism that projects outward in the radial direction of the pump body. Therefore, an object of the present invention is to shorten the length of the electromagnetic suction valve mechanism, particularly in the axial direction, and to reduce the size of the fuel pump.
  • the fuel pump of the present invention is arranged in a fixed core that attracts a movable core by a magnetic attraction force generated by energizing a coil, and a recess formed on the inner diameter side of the fixed core.
  • a spring member for urging the rod driven by the movable core, and a magnetic member arranged on the outer peripheral side of the coil to form a magnetic circuit, and the axially outer spring end surface of the spring member is The magnetic member is arranged axially outside of the axially outer end surface.
  • FIG. 3 is a vertical cross-sectional view of the fuel pump seen from a different direction from FIG. 2. It is an axial sectional view for explaining electromagnetic suction valve mechanism 3 of an example of the present invention. It is the drawing which expanded the electromagnetic suction valve mechanism 3 of the Example of this invention. It is the drawing which decomposed
  • FIGS. The configuration and operation of the system will be described using the overall configuration diagram of the engine system shown in FIG.
  • the part surrounded by the broken line shows the main body of the high-pressure fuel supply pump (hereinafter referred to as the fuel pump), and the mechanism and parts shown in the broken line are integrated with the body 1 (may be called the pump body). Indicates that it is installed.
  • the fuel pump the high-pressure fuel supply pump
  • the pump body the mechanism and parts shown in the broken line are integrated with the body 1 (may be called the pump body). Indicates that it is installed.
  • the fuel in the fuel tank 103 is pumped up from the fuel tank 103 by the feed pump 102 based on a signal from the engine control unit 101 (hereinafter referred to as ECU). This fuel is pressurized to an appropriate feed pressure and sent to the low-pressure fuel intake port 10a of the fuel pump through the fuel pipe 104.
  • ECU engine control unit 101
  • the fuel that has flowed in from the low-pressure fuel intake port 10a of the intake pipe 5 (not shown in FIG. 1) reaches the intake port 3k of the electromagnetic intake valve mechanism 3, which is a variable capacity mechanism, via the pressure pulsation reducing mechanism 9 and the intake passage 10d. ..
  • the fuel flowing into the electromagnetic suction valve mechanism 3 passes through the suction valve 3b, flows through the suction passage 1a formed in the body 1, and then flows into the pressurizing chamber 11.
  • Power for reciprocating motion is applied to the plunger 2 by the cam mechanism 91 of the engine. Due to the reciprocating motion of the plunger 2, fuel is sucked from the suction valve 3b during the downward stroke of the plunger 2 and pressurized during the upward stroke.
  • the discharge valve mechanism 8 opens and high-pressure fuel is pressure-fed to the common rail 106 on which the pressure sensor 105 is mounted. Then, based on the signal from the ECU 101, the injector 107 injects fuel into the engine.
  • the present embodiment is a fuel pump applied to a so-called direct injection engine system in which the injector 107 injects fuel directly into the cylinder of the engine.
  • the fuel pump discharges a desired fuel flow rate of the supplied fuel in response to a signal from the ECU 101 to the electromagnetic suction valve mechanism 3.
  • FIG. 2 is a vertical cross-sectional view of the fuel pump of this embodiment as seen in a vertical cross section
  • FIG. 3 is a horizontal cross-sectional view of the fuel pump as seen from above
  • FIG. 4 is a vertical cross-sectional view of the fuel pump as viewed in a vertical direction different from that of FIG.
  • the fuel pump of this embodiment uses a mounting flange 1e (FIG. 3) provided on the body 1 to be in close contact with a fuel pump mounting portion 90 (FIGS. 2 and 4) of an engine (internal combustion engine) and fixed with a plurality of bolts (not shown). To be done.
  • an O-ring 93 is fitted into the body 1 for a seal between the fuel pump mounting portion 90 and the body 1 to prevent engine oil from leaking to the outside.
  • a cylinder 6 that guides the reciprocating motion of the plunger 2 and forms a pressurizing chamber 11 together with the body 1 is attached to the body 1. Further, an electromagnetic suction valve mechanism 3 for supplying fuel to the pressurizing chamber 11 and a discharge valve mechanism 8 for discharging fuel from the pressurizing chamber 11 to the discharge passage are provided.
  • the cylinder 6 is press-fitted with the body 1 on the outer peripheral side. Further, by deforming the body 1 to the inner peripheral side (inward in the radial direction), the fixing portion 6a of the cylinder 6 is pressed upward in the drawing, and the fuel pressurized in the pressurizing chamber 11 at the upper end surface of the cylinder 6 is released. Sealed to prevent leakage to the low pressure side. That is, the pressurizing chamber 11 is composed of the body 1, the electromagnetic suction valve mechanism 3, the plunger 2, the cylinder 6, and the discharge valve mechanism 8.
  • a tappet 92 that converts the rotational movement of a cam 91 attached to the camshaft of the engine into vertical movement and transmits it to the plunger 2.
  • the plunger 2 is pressed against the tappet 92 by the spring 18 via the retainer 15. This allows the plunger 2 to reciprocate up and down with the rotational movement of the cam 91.
  • the plunger seal 13 held at the lower end of the inner circumference of the seal holder 7 is installed in a slidable contact with the outer circumference of the plunger 2 at the lower part of the cylinder 6 in the figure.
  • lubricating oil including engine oil
  • the relief valve mechanism 4 shown in FIGS. 2 and 3 includes a seat member 4e, a relief valve 4d, a relief valve holder 4c, a relief spring 4b, and a spring support member 4a.
  • the spring support member 4a also functions as a relief body that contains the relief spring 4b and forms a relief valve chamber.
  • the spring support member 4a (relief body) of the relief valve mechanism 4 is press-fitted and fixed in the lateral hole formed in the body 1.
  • One end of the relief spring 4b is in contact with the spring support member 4a and the other end is in contact with the relief valve holder 4c.
  • the relief valve 4d shuts off the fuel by the urging force of the relief spring 4b acting via the relief valve holder 4c and being pressed against the relief valve seat (seat member 4e).
  • the valve opening pressure of the relief valve 4d is determined by the urging force of the relief spring 4b.
  • the relief valve mechanism 4 communicates with the pressurizing chamber 11 via the relief passage, but is not limited to this, and communicates with the low pressure passage (the low pressure fuel chamber 10 or the suction passage 10d, etc.). It may be done.
  • the relief valve mechanism 4 is a valve configured to operate when a problem occurs in the common rail 106 or a member ahead of the common rail 106 and the common rail 106 becomes abnormally high in pressure.
  • the relief valve mechanism 4 is configured to open the relief valve 4d against the biasing force of the relief spring 4b when the differential pressure between the upstream side and the downstream side of the relief valve 4d exceeds the set pressure. It It has a role of opening the valve when the pressure in the common rail 106 or a member beyond it becomes high and returning the fuel to the pressurizing chamber 11 or the low pressure passage (the low pressure fuel chamber 10 or the suction passage 10d). 2 and 3 show a structure in which the relief valve mechanism 4 returns to the pressurizing chamber 11 when the valve is opened. Therefore, it is necessary to maintain the valve closed state at a predetermined pressure or less, and a very strong relief spring 4b is provided to counter the high pressure.
  • a suction pipe 5 is attached to the side surface of the body 1.
  • the intake pipe 5 is connected to a low-pressure pipe 104 that supplies fuel from a fuel tank 103 of the vehicle, and the fuel is supplied from here to the inside of the fuel pump.
  • the suction filter 17 in the suction passage 5a at the tip of the suction pipe 5 prevents foreign matter existing between the fuel tank 103 and the low-pressure fuel suction port 10a from being absorbed into the fuel pump by the flow of fuel.
  • the fuel that has passed through the low-pressure fuel intake port 10a reaches the intake port 3k of the electromagnetic intake valve mechanism 3 via the pressure pulsation reducing mechanism 9 and the low-pressure fuel flow path 10d (see FIG. 2).
  • the plunger 2 After the plunger 2 finishes the inhalation stroke, the plunger 2 starts to move up and moves to the upstroke.
  • the electromagnetic coil 3g remains in the non-energized state, and the magnetic biasing force does not act.
  • the rod urging spring 3m is set so as to have a urging force necessary and sufficient for keeping the intake valve 3b open in the non-energized state.
  • the volume of the pressurizing chamber 11 decreases with the compressive movement of the plunger 2. In this state, the fuel once sucked into the pressurizing chamber 11 is sucked again through the opening 3f of the intake valve 3b in the valve open state. Since it is returned to the passage 10d, the pressure in the pressurizing chamber does not rise. This process is called a return process.
  • the suction valve 3b is closed by the urging force of the suction valve urging spring 3l and the fluid force of the fuel flowing into the suction passage 10d.
  • the fuel pressure in the pressurizing chamber 11 rises with the ascending movement of the plunger 2, and when the pressure becomes equal to or higher than the pressure of the fuel discharge port 12a, the high pressure fuel is discharged through the discharge valve mechanism 8 to the common rail 106. Supplied.
  • This process is called a discharge process.
  • the discharge joint 12 is inserted into the lateral hole of the body 1, and the fuel discharge port 12a is formed by the internal space of the discharge joint 12.
  • the discharge joint 12 is fixed to the lateral hole of the body 1 by welding at the welded portion 12b.
  • the ascending stroke from the lower start point to the upper start point of the plunger 2 consists of the return stroke and the discharge stroke.
  • the timing of energizing the coil 3g of the electromagnetic suction valve mechanism 3 controls the timing of energizing the coil 3g of the electromagnetic suction valve mechanism 3. If the timing of energizing the electromagnetic coil 3g is advanced, the proportion of the return stroke during the ascending stroke is small and the proportion of the discharge stroke is large. That is, less fuel is returned to the suction passage 10d, and more fuel is discharged under high pressure. On the other hand, if the timing of energization is delayed, the proportion of the return stroke is large and the proportion of the discharge stroke is small during the rising stroke. That is, much fuel is returned to the suction passage 10d, and less fuel is discharged under high pressure.
  • the timing of energizing the electromagnetic coil 3g is controlled by a command from the ECU 101.
  • the discharge valve mechanism 8 on the outlet side of the pressurizing chamber 11 of the body 1 includes a discharge valve seat 8a, a discharge valve 8b that contacts and separates from the discharge valve seat 8a, and a discharge valve spring that biases the discharge valve 8b toward the discharge valve seat 8a. 8c and a discharge valve stopper 8d that determines the stroke (movement distance) of the discharge valve 8b.
  • the discharge valve stopper 8d is press-fitted into a plug 8e that blocks the leakage of fuel to the outside.
  • the plug 8e is joined by welding at the welded portion 8f.
  • a discharge valve chamber 8g is formed on the secondary side of the discharge valve 8b, and the discharge valve chamber 8g communicates with the fuel discharge port 12a through a lateral hole formed in the body 1 in the horizontal direction.
  • the discharge valve 8b When there is no fuel pressure difference between the pressurizing chamber 11 and the discharge valve chamber 8g, the discharge valve 8b is pressed against the discharge valve seat 8a by the urging force of the discharge valve spring 8c and is in the closed state. Only when the fuel pressure in the pressurizing chamber 11 becomes higher than the fuel pressure in the discharge valve chamber 8g, the discharge valve 8b opens against the biasing force of the discharge valve spring 8c. When the discharge valve 8b is opened, the high-pressure fuel in the pressurizing chamber 11 is discharged to the common rail 106 (see FIG. 1) via the discharge valve chamber 8g and the fuel discharge port 12a. With the configuration as described above, the discharge valve mechanism 8 functions as a check valve that limits the flow direction of fuel.
  • the low pressure fuel chamber 10 is provided with a pressure pulsation reducing mechanism 9 for reducing the pressure pulsation generated in the fuel pump from spreading to the fuel pipe 104.
  • a pressure pulsation reducing mechanism 9 for reducing the pressure pulsation generated in the fuel pump from spreading to the fuel pipe 104.
  • the plunger 2 has a large diameter portion 2a and a small diameter portion 2b, and the volume of the sub chamber 7a increases or decreases due to the reciprocating motion of the plunger.
  • the sub chamber 7a communicates with the low pressure fuel chamber 10 through the fuel passage 10e.
  • the fuel flows from the sub chamber 7a to the low pressure fuel chamber 10
  • the plunger 2 rises the fuel flows from the low pressure fuel chamber 10 to the sub chamber 7a.
  • the fuel flow rate into and out of the pump during the suction stroke or the return stroke of the pump can be reduced, and the pressure pulsation generated inside the fuel pump can be reduced.
  • FIGS. 5 is an axial sectional view of the electromagnetic suction valve mechanism 3 of the present embodiment
  • FIG. 6 is an enlarged view of the electromagnetic suction valve mechanism 3
  • FIG. 7 is an exploded view of main parts of the electromagnetic suction valve mechanism 3. It is the drawing shown.
  • the fuel pump of this embodiment includes a bobbin 3p arranged radially outside the fixed core 3e or the movable core 3h, around which a coil 3g is wound, and the terminal member 16 corresponds to the cutout 3ra.
  • the bobbin 3p is connected to the bobbin 3p.
  • the fuel pump includes a cup-shaped yoke 3q arranged on the outside in the radial direction of the coil 3g and the cover member 3r, and the terminal member 16 includes a bobbin on the inside in the radial direction of the cylindrical side surface portion of the yoke 3q. It is connected to 3p.
  • the cover member 3r is biased inward in the axial direction by the disc spring 3s, and the C ring 3t is fitted in the groove formed in the small diameter portion 3ea of the fixed core 3e, so that the disc spring 3s is maintained in the biased state. So that the disc spring 3s is held.
  • the bobbin 3p has a protruding portion 3pa arranged from the radially inner side to the radially outer side with respect to the cylindrical side surface of the yoke 3q, and the terminal member 16 is fixed by the protruding portion 3pa.
  • the bobbin 3p and the protrusion 3pa are integrally formed of a non-conductive material such as resin mold or plastic.
  • a hole 3qc is formed on the bottom surface of the yoke 3q, and the inner peripheral portion of the hole 3qc is press-fitted into the outer peripheral portion of the anchor guide portion 3u.
  • the inner peripheral portion of the anchor guide portion 3u guides the outer peripheral portion of the anchor 3h.
  • the inner peripheral portion of the anchor guide portion 3u is press-fitted into the outer peripheral portion of the small diameter portion of the seat member 3v on the axially opposite side to the anchor 3h.
  • the seat member 3v forms the seat portion 3a shown in FIGS. 2 and 3, and also has an elongated hole formed at the center in the radial direction, and the rod 3i is guided by the inner peripheral portion of the elongated hole.
  • the coil 3g is connected to the terminal member 16 on the outside in the radial direction of the yoke 3q. Specifically, the terminal member 16 fixes the wire by sandwiching and crimping the wire from the coil 3g at the wire connecting portion 16a. That is, the wire from the coil 3g is welded to the terminal member 16 at the wire connecting portion 16a.
  • the wire from the coil 3g is not shown in FIG.
  • the bobbin 3p has a protrusion 3pb or a groove (not shown) formed along the axial direction of the coil 3g (the left-right direction in FIG. 5), and the wire of the coil 3g contacts the protrusion 3pb or the groove. In this state, it is desirable that the terminal member 16 be wound.
  • the bobbin 3p is formed with a notch 3pc for disposing the coil 3g wound around the bobbin 3p on the axially outer side of the coil 3g, and the bobbin 3p has the axially inner side of the notch 3pc (rightward in FIG. 5).
  • the coil 3g arranged axially outside (to the left in FIG. 5) is formed toward the protrusion 3pb or the groove located radially outside.
  • the fuel pump of the present embodiment is arranged on the outer peripheral side of the fixed core 3e that attracts the movable core by the magnetic attraction force generated by energizing the coil 3g, and on the outer peripheral side of the coil 3g.
  • a magnetic member (cover member 3r) forming a magnetic circuit.
  • the magnetic member is arranged outside the fixed core 3e in the axial direction.
  • the spring member 3m is arranged in the recessed portion 3ec formed on the inner diameter side of the fixed core 3e, and urges the rod 3i driven by the movable core 3h.
  • the axially outer spring end surface 3ma of the spring member 3m is arranged axially outer (left side in FIG.
  • the bottom surface 3ed of the recessed portion 3ec of the fixed core 3e is arranged axially outside of the axially outer end surface (axial outer cover end surface 3rc) of the magnetic member.
  • the above-mentioned magnetic member is the cover member 3r arranged on the axially outer side of the fixed core 3e, and the axially outer cover end surface of the cover member 3r and the axially outer end surface of the magnetic member are the same surface. ..
  • the fixed core 3e is based on Fe and has C 0.18 wt%, Mo, Si, Al 12 wt% or less, Cu 2 wt%, Ni 4 wt%, Cr 9 to 20 wt%, Ti 0.5 wt% or less.
  • the fixed core 3e and the magnetic member (cover member 3r) are formed as separate members, but the present invention is not limited to this, and they may be an integral member. That is, in this case, the large diameter portion 3ea and the cover member 3r are formed as an integral member, and the axially outer end surface of the integrated large diameter portion is referred to as the axial outer cover end surface 3rc of the cover member 3r. Show. As a result, the position of the spring member 3m can be moved outward in the axial direction as compared with the conventional case. Therefore, since the axial length of the fixed core 3e can be shortened, the cost can be reduced.
  • the fixed core 3e and the cover member 3r are separate members, but the cover member 3r is also a magnetic member.
  • the axially outer cover end surface 3rc of the cover member 3r and the axially outer end surface of the fixed core 3e are flush with each other. Thereby, the space of the hole formed in the central portion of the cover member 3r can be effectively used, and the axial length of the fixed core 3e can be shortened. Further, since the cover member 3r approaches the coil 3g, the magnetic circuit can be downsized, and as a result, the efficiency of the magnetic circuit can be improved.
  • FIG. 6 is an enlarged view of the electromagnetic suction valve mechanism 3.
  • the fixed core 3e has a large diameter portion 3ea and a small diameter portion 3eb, and the cover member 3r is arranged radially outside the small diameter portion 3eb and axially outside the large diameter portion 3ea.
  • the small diameter portion 3eb of the fixed core 3e has a length L1 from the axial outer cover end surface 3rc of the cover member 3r to the axial outer small diameter end surface 3ee of the small diameter portion 3eb from the axial inner cover end surface 3rd of the cover member 3r to the large diameter portion.
  • the length L2 up to the axially inner large-diameter end face 3ef of 3ea is equal to or more than the length L2.
  • the length L3 from the axially outer yoke end surface 3qa of the yoke 3q to the axially outer small diameter end surface 3ee of the small diameter portion 3eb is set from the axial outer cover end surface 3rc of the cover member 3r to the yoke 3q. It is configured to be larger than the length L4 up to the axially outer yoke end surface 3qa. That is, by securing the length of L3, it is possible to secure the strength for withstanding the load received from the spring member 3m.
  • the terminal member 16 for power supply is electrically connected to the coil 3g and is arranged inside the connector 17.
  • the fixed core 3e is configured such that the axially outer small-diameter end surface 3ee of the small-diameter portion 3eb is arranged axially outside with respect to the axially outer connector end surface 17b of the connector 17.
  • the terminal member 16 is arranged inside the connector 17 and along the direction (vertical direction in FIG. 6) intersecting the axial direction of the coil 3g (horizontal direction in FIG. 6) and electrically connected to the coil 3g. Connected to.
  • the spring member 3m is arranged radially inward of the cover member 3r, and the axially outer spring end surface 3ma of the spring member 3m is axially outward with respect to the connecting portion (wire connecting portion 16a) between the terminal member and the coil 3g. Arranged to be arranged. Thereby, the length of L3 can be secured, and the strength for withstanding the load received from the spring member 3m can be secured.
  • the yoke 3q is formed in a cylindrical shape, and a notch 3qb extending inward in the axial direction is formed from a part of the axially outer end surface 3qa of the yoke 3q in the circumferential direction.
  • the terminal member 16 is formed so as to pass from the radially inner side of the yoke 3q through the notch 3qb to the radially outer side of the yoke 3q. Since this allows the terminal member 16 to be projected in the radial direction, the length in the axial direction can be made shorter than that in which the terminal member 16 is projected in the axial direction, so that it does not become an obstacle when installing the fuel pump.
  • the connector 17 is formed such that the radial length L5 is larger than the axial length L6, and the radial length L6 is substantially constant in the entire region of the connector 17 in the longitudinal direction (radial direction). It is desirable to be formed as follows.
  • the magnetic circuit can be efficiently formed, so that the required magnetic attraction force can be generated even if the energization current is reduced, and the power consumption can be reduced.

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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)

Abstract

Selon la présente invention, un circuit magnétique d'une électrovanne est rendu compact et présente une structure qui génère de manière efficace une force magnétique, et à la fois une miniaturisation et des coûts réduits de celui-ci sont obtenus. À cet effet, une pompe à carburant selon la présente invention comprend : un noyau fixe qui aspire un noyau mobile par le biais d'une force d'aspiration magnétique générée par la conduction d'une bobine ; un élément de ressort qui est disposé dans une partie d'évidement formée dans le côté de diamètre interne du noyau fixe et qui sollicite une tige entraînée par le noyau mobile ; et un élément magnétique qui est disposé sur le côté périphérique externe de la bobine et qui forme un circuit magnétique, une surface d'extrémité de ressort externe axiale de l'élément de ressort étant disposée de manière axiale vers l'extérieur d'une surface d'extrémité externe axiale de l'élément magnétique.
PCT/JP2019/039577 2018-10-31 2019-10-08 Pompe à carburant WO2020090371A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020553715A JP7110384B2 (ja) 2018-10-31 2019-10-08 燃料ポンプ

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Application Number Priority Date Filing Date Title
JP2018-204675 2018-10-31
JP2018204675 2018-10-31

Publications (1)

Publication Number Publication Date
WO2020090371A1 true WO2020090371A1 (fr) 2020-05-07

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PCT/JP2019/039577 WO2020090371A1 (fr) 2018-10-31 2019-10-08 Pompe à carburant

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010216466A (ja) * 2009-02-18 2010-09-30 Denso Corp 高圧ポンプ
JP2012082849A (ja) * 2010-10-07 2012-04-26 Hitachi Automotive Systems Ltd 電磁駆動機構、この電磁駆動機構を用いた電磁弁およびこの電磁弁を用いた電磁吸入弁を備えた可変流量式高圧燃料供給ポンプ
JP2014025389A (ja) * 2012-07-26 2014-02-06 Denso Corp 電磁駆動装置およびそれを用いた高圧ポンプ
WO2018123323A1 (fr) * 2016-12-28 2018-07-05 日立オートモティブシステムズ株式会社 Pompe d'alimentation en carburant à haute pression pourvue d'une soupape d'admission électromagnétique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010216466A (ja) * 2009-02-18 2010-09-30 Denso Corp 高圧ポンプ
JP2012082849A (ja) * 2010-10-07 2012-04-26 Hitachi Automotive Systems Ltd 電磁駆動機構、この電磁駆動機構を用いた電磁弁およびこの電磁弁を用いた電磁吸入弁を備えた可変流量式高圧燃料供給ポンプ
JP2014025389A (ja) * 2012-07-26 2014-02-06 Denso Corp 電磁駆動装置およびそれを用いた高圧ポンプ
WO2018123323A1 (fr) * 2016-12-28 2018-07-05 日立オートモティブシステムズ株式会社 Pompe d'alimentation en carburant à haute pression pourvue d'une soupape d'admission électromagnétique

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JPWO2020090371A1 (ja) 2021-09-09

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