WO2019151039A1 - Structure d'assemblage de pompe à carburant - Google Patents

Structure d'assemblage de pompe à carburant Download PDF

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Publication number
WO2019151039A1
WO2019151039A1 PCT/JP2019/001828 JP2019001828W WO2019151039A1 WO 2019151039 A1 WO2019151039 A1 WO 2019151039A1 JP 2019001828 W JP2019001828 W JP 2019001828W WO 2019151039 A1 WO2019151039 A1 WO 2019151039A1
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WO
WIPO (PCT)
Prior art keywords
tappet
adapter
camshaft
insertion hole
pin
Prior art date
Application number
PCT/JP2019/001828
Other languages
English (en)
Japanese (ja)
Inventor
優介 小林
和貴 大石
良 中西
竜太郎 山城
Original Assignee
いすゞ自動車株式会社
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 いすゞ自動車株式会社 filed Critical いすゞ自動車株式会社
Priority to CN201980010870.8A priority Critical patent/CN111655999B/zh
Publication of WO2019151039A1 publication Critical patent/WO2019151039A1/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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/06—Feeding by means of driven pumps mechanically driven
    • 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
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam

Definitions

  • This disclosure relates to a fuel pump assembly structure.
  • Patent Document 1 describes an engine provided with a high-pressure fuel pump.
  • a valve operating chamber is formed between the cylinder head of the engine and the cam housing, and an intake cam shaft and an exhaust cam shaft are accommodated in the valve operating chamber.
  • the exhaust camshaft is provided with a plurality of exhaust cams for raising and lowering the exhaust valve and one drive cam for driving the high-pressure fuel pump.
  • a part of the cam housing constitutes a pump housing part which is a part of the high-pressure fuel pump.
  • a guide hole facing the drive cam is formed in the pump housing portion, and a tappet is provided in the guide hole so as to be movable up and down.
  • a guide hole is formed in the outer peripheral surface of the tappet.
  • a boss portion is provided in the pump housing portion, and a bolt hole is formed in the boss portion. The tip of the bolt screwed into the bolt hole is inserted into the guide hole on the outer peripheral surface of the tappet, thereby preventing the tappet from rotating and tilting when the tappet advances and retreats.
  • the bolt hole for screwing the bolt that stops the tappet is formed in the pump housing part that is a part of the cam housing of the engine. May leak from the bolt hole to the outside of the engine.
  • the groove is formed inside the hole. Therefore, it is difficult to form the groove as compared with the case where the groove is formed on the outer peripheral surface of the tappet, and the work efficiency may be deteriorated and the processing cost may be increased.
  • An object of the present disclosure is to provide a fuel pump assembly structure capable of preventing oil leakage while preventing rotation of the tappet.
  • the fuel pump assembly structure includes a camshaft housing, an adapter, and a fuel pump.
  • the camshaft housing has an adapter insertion hole extending in a predetermined direction from the internal opening that opens toward the cam of the camshaft of the engine, and accommodates the camshaft therein.
  • the adapter extends along the predetermined direction and is disposed in a cylindrical cylinder part in which at least a part of the adapter part is inserted into the adapter insertion hole of the camshaft housing, and in an area of the cylinder part inserted into the adapter insertion hole.
  • a protrusion that protrudes radially inward from the inner peripheral surface of the cylinder, and is fixed to the camshaft housing.
  • the fuel pump has a tappet that is slidably supported in the predetermined direction on the inner peripheral surface of the cylinder portion of the adapter while supporting a roller that contacts the cam. And the fuel is supplied to the engine side using the reciprocating motion of the tappet.
  • On the outer peripheral surface of the tappet there is formed a groove portion that extends linearly along the predetermined direction and that engages with the protruding portion while allowing the protruding portion of the adapter to be inserted. The engagement between the protruding portion of the adapter and the groove portion of the tappet allows the tappet to reciprocate along the predetermined direction and restricts the rotational movement of the tappet in the direction crossing the groove portion.
  • the protruding portion of the adapter protrudes radially inward from the inner peripheral surface of the cylinder portion, and the adapter protruding portion is inserted into the outer peripheral surface of the tappet of the fuel pump in a straight line along a predetermined direction. Grooves that are allowed to engage with the protrusions are formed. For this reason, by properly arranging the protrusion of the adapter and the groove of the tappet, when the tappet is inserted into the cylinder of the adapter, the rotation of the camshaft rotation shaft (cam rotation shaft) and the fuel pump roller The shafts can be easily positioned so as to be substantially parallel to each other.
  • the engagement between the protruding portion of the adapter and the groove portion of the tappet regulates the rotational movement of the tappet in the direction crossing the groove portion. For this reason, when the fuel pump is driven (when the tappet is reciprocated), the cam shaft and the rotation axis of the roller of the fuel pump set when the tappet is inserted into the cylinder portion of the adapter. It can be prevented that the direction of rotation (direction intersecting with the groove portion) is not substantially parallel, and seizure between the cam and the roller can be prevented.
  • the protruding part of the adapter is arranged in the area inserted into the adapter insertion hole in the cylinder part. Therefore, for example, a pin insertion hole penetrating in the radial direction is provided in the cylinder portion of the adapter, and the pin is protruded by inserting the pin into the pin insertion hole and projecting radially inward from the inner peripheral surface of the cylinder portion. Since the pin insertion hole is located in the area of the cylinder part that is inserted into the adapter insertion hole of the camshaft housing, oil that flows out of the cylinder part from the pin insertion hole is camped. It can be retained in the shaft housing. Accordingly, oil can be prevented from flowing out of the camshaft housing.
  • an adapter is provided between the camshaft housing and the fuel pump, and the inner peripheral surface of the cylinder portion of the adapter slidably supports the tappet, so even if the cylinder portion is damaged by the sliding of the tappet, the adapter This can be dealt with by replacing the fuel pump, and unlike the case where the fuel pump is directly attached to the camshaft housing, there is no need to replace the camshaft housing.
  • oil leakage can be prevented while preventing the tappet from rotating.
  • FIG. 1 is a schematic diagram of an engine to which a fuel pump assembly structure according to an embodiment of the present disclosure is applied.
  • FIG. 2 is a schematic view of FIG. 1 viewed from the direction of arrow II.
  • FIG. 3 is a schematic cross-sectional view of the main part of the fuel pump assembly structure.
  • FIG. 4 is an external perspective view of the adapter.
  • FIG. 5 is an enlarged view of a main part of the supply pump.
  • FIG. 6 is a cross-sectional view showing an engaged state between the pin and the slide groove.
  • the fuel pump assembly structure includes, for example, a supply pump (fuel pump) of a diesel engine 1 (hereinafter simply referred to as the engine 1) having a common rail fuel injection system. Applies to 50 assembly structures.
  • the fuel in the fuel tank 2 is supplied to the supply pump 50 side by the feed pump 3, the fuel is pressurized by the supply pump 50 and supplied to the common rail 4, and the high pressure pressurized by the supply pump 50 is supplied.
  • the common rail fuel injection system the fuel in the fuel tank 2 is supplied to the supply pump 50 side by the feed pump 3, the fuel is pressurized by the supply pump 50 and supplied to the common rail 4, and the high pressure pressurized by the supply pump 50 is supplied.
  • the common rail fuel injection system the fuel in the fuel tank 2 is supplied to the supply pump 50 side by the feed pump 3, the fuel is pressurized by the supply pump 50 and supplied to the common rail 4, and the high pressure pressurized by the supply pump 50 is supplied.
  • the common rail fuel injection system the fuel in the fuel tank 2 is supplied to the supply pump 50 side by the
  • the fuel injected from the injector 5 into the combustion chamber 6 is ignited and burned by the high-temperature air compressed by the piston 7 in the combustion chamber 6, and the gas expanded by this combustion pushes down the piston 7 to The crankshaft 8 is rotated.
  • FIG. 2 only one combustion chamber 6 is shown.
  • the engine 1 has an intake valve 11 that controls intake air to the combustion chamber 6, an exhaust valve 12 that controls exhaust gas from the combustion chamber 6, a feed pump 3, and a camshaft 13 for driving a supply pump 50.
  • the cylinder block 1a of the engine 1 supports the camshaft 13 rotatably.
  • a shaft housing space 21 (see FIG. 3) for housing the camshaft 13 is formed inside the cylinder block 1a. That is, a part of the cylinder block 1a functions as a camshaft housing 20 (see FIG. 3) that forms the shaft housing space 21.
  • the intake valve 11 and the exhaust valve 12 are connected to the push rod 16 via the arm 15 and are driven by the rotation of the camshaft 13.
  • FIG. 2 the arm 15 and the push rod 16 on the intake valve 11 side are shown, and the illustration of the arm 15 and the push rod 16 on the exhaust valve 12 side is omitted.
  • the camshaft 13 is a rod-shaped member, and integrally includes a plurality of cams, and is rotatably supported by the cylinder block 1a of the engine 1.
  • the plurality of cams include a plurality of intake valve drive cams 17, a plurality of exhaust valve drive cams 18 (only one exhaust valve drive cam 18 is shown in FIG. 3), and a feed pump drive cam 19. And a supply pump drive cam (cam) 14.
  • the camshaft 13 has a rotation axis CL2 extending in the axial direction (extending direction) of the camshaft 13, and is arranged so that the rotation axis CL2 of the camshaft 13 is substantially parallel to the rotation axis CL1 of the crankshaft 8. .
  • An input gear 9 is fixedly provided at an end portion on one end side of the camshaft 13.
  • the input gear 9 of the camshaft 13 is connected to the crankshaft 8 via a gear or a chain.
  • a force for rotating the camshaft 13 is input from the crankshaft 8 to the input gear 9 of the camshaft 13, and the camshaft 13 rotates as the crankshaft 8 rotates.
  • the tip of the push rod 16 on the intake valve 11 side is in contact with the intake valve drive cam 17, and the tip of the push rod 16 on the exhaust valve 12 side is in contact with the exhaust valve drive cam 18.
  • the tappet roller (not shown) of the feed pump 3 comes into contact with the supply pump drive cam 14, and a tappet roller (roller) 51, which will be described later, of the supply pump 50 comes into contact.
  • the intake valve drive cam 17 drives the intake valve 11
  • the exhaust valve drive cam 18 drives the exhaust valve 12
  • the feed pump drive cam 19 drives the feed pump 3
  • the supply pump drive cam 14 drives the supply pump 50. To do.
  • the fuel pump assembly structure includes a camshaft housing 20, an adapter 30, and a supply pump 50 of the engine 1.
  • the camshaft housing 20 has an adapter insertion hole 22 penetrating along the vertical direction (predetermined direction), and forms a shaft housing space 21.
  • the adapter insertion hole 22 communicates the shaft housing space 21 with the outside of the camshaft housing 20.
  • the adapter insertion hole 22 extends in a direction crossing the rotation axis CL2 of the camshaft 13.
  • An opening 23 on the shaft housing space 21 side of the adapter insertion hole 22 (hereinafter referred to as an internal opening 23) is disposed at a position spaced upward from the supply pump drive cam 14 of the camshaft 13 housed in the shaft housing space 21. , Opening toward the supply pump drive cam 14.
  • the adapter 30 includes a cylindrical cylinder portion 31 that extends in the vertical direction, a flange-like flange portion 32 that extends radially outward from the upper end portion of the cylinder portion 31, and the cylinder portion 31.
  • the pin 37 is fixed to the camshaft housing 20.
  • the cylinder part 31 is inserted into the adapter insertion hole 22 of the camshaft housing 20 from above. With the cylinder portion 31 inserted into the adapter insertion hole 22 of the camshaft housing 20 from above, the flange portion 32 is disposed outside the camshaft housing 20, and the upper surface of the camshaft housing 20 around the adapter insertion hole 22 It is fastened and fixed to. A seal member (not shown) such as a gasket is interposed between the flange portion 32 and the upper surface of the camshaft housing 20 around the adapter insertion hole 22.
  • the cylinder portion 31 has a pump insertion hole 35 that communicates the upper end opening 33 and the lower end opening 34 and extends linearly in the vertical direction.
  • the direction in which the axis of the pump insertion hole 35 extends is a direction orthogonal to the rotation axis CL2 of the camshaft 13.
  • the lower end opening 34 is disposed at a position spaced upward from the supply pump drive cam 14 of the camshaft 13 accommodated in the shaft accommodation space 21 and opens toward the supply pump drive cam 14.
  • a pin is inserted that penetrates the cylinder portion 31 in the radial direction (in the present embodiment, the direction orthogonal to the axis of the cylinder portion 31).
  • a hole 38 is formed.
  • the pin insertion hole 38 extends along a direction orthogonal to the rotation axis CL2 of the camshaft 13 in a top view.
  • the position where the pin insertion hole 38 is provided is included in a range in which the later-described tappet 52 of the supply pump 50 slides in the region 36 of the cylinder portion 31.
  • the pin 37 is a rod that extends along the pin insertion hole 38 of the cylinder part 31, and is pressed into the pin insertion hole 38 and fixed to the cylinder part 31. That is, the pin 37 extends along a direction orthogonal to the rotation axis CL2 of the camshaft 13 in a top view.
  • the outer end of the radial pin 37 of the cylinder part 31 is disposed on substantially the same surface as the outer peripheral surface 31 a of the cylinder part 31.
  • the inner end of the pin 37 is disposed on the radially inner side with respect to the inner peripheral surface 31 b of the cylinder portion 31. That is, the pin 37 has a protruding portion 39 (see FIG.
  • the supply pump 50 is a piston type pump having a pump main body 53, a plunger 54, a tappet 52, and a tappet roller 51, and the rotational movement of the camshaft 13 is reciprocated between the tappet roller 51 and the tappet 52. This is converted into motion, and the plunger 54 in the pump body 53 is reciprocated by the reciprocating motion of the tappet 52 to supply the fuel supplied from the feed pump 3 to the common rail 4 (see FIG. 1) side.
  • the supply pump 50 is fixed to the camshaft housing 20 via the adapter 30.
  • the tappet 52 is formed in a substantially cylindrical shape, and its outer peripheral surface 52 c slides along the inner peripheral surface 31 b of the cylinder portion 31 of the adapter 30, and moves up and down in the cylinder portion 31. Move back and forth.
  • the sliding range 62 of the tappet 52 (range of reciprocating movement) is such that the lower end 52a of the tappet 52 at the top dead center (position indicated by a two-dot chain line in FIG. 5) is at the bottom dead center (position indicated by a solid line in FIG. 5). It is set to be positioned below the upper end 52b of the tappet 52.
  • the sliding range 62 of the tappet 52 has an area 63 where the tappet 52 always exists when the tappet 52 reciprocates (between the lower end 52a of the tappet 52 at the top dead center and the upper end 52b of the tappet 52 at the bottom dead center).
  • An area (hereinafter referred to as an overlapping area 63) exists.
  • the pin insertion hole 38 (see FIG. 4) of the cylinder part 31 is located within the sliding range 62 of the tappet 52 in the above-described area 36 of the cylinder part 31 (area 36 inserted into the adapter insertion hole 22 of the camshaft housing 20). It is formed at a height position (position indicated by a one-dot chain line 64 in FIG.
  • a wall portion 60 that partitions the inner diameter portion into an upper region and a lower region is provided at the inner diameter portion of the tappet 52.
  • the outer peripheral surface 52c of the tappet 52 is formed with a slide groove portion (groove portion) 61 that extends linearly along the vertical direction while being recessed radially inward from the outer peripheral surface 52c. .
  • the slide groove portion 61 extends downward from a predetermined height position below the upper end 52 b of the tappet 52 and is opened downward from the lower end 52 a of the tappet 52.
  • the slide groove 61 is formed in a size that allows the protrusion 39 of the pin 37 of the adapter 30 to be inserted and engages with the protrusion 39 of the pin 37.
  • the width of the slide groove 61 (the length in the circumferential direction of the tappet 52) is such that the tappet 52 rotates relative to the adapter 30 when the slide groove 61 of the tappet 52 and the protrusion 39 of the pin 37 of the adapter 30 are engaged. It is set slightly longer than the diameter of the pin 37 so that (the movement of the tappet 52 in the circumferential direction) is restricted.
  • the length (vertical length) of the slide groove 61 is longer than the diameter of the pin 37, and the top dead center and bottom dead of the tappet 52 in a state where the protrusion 39 of the pin 37 is inserted into the slide groove 61. It is set to a length that allows movement between points.
  • the upper end of the slide groove 61 is set so as to be positioned above the height position 64 of the pin 37 in a state where the tappet 52 is at the bottom dead center, and the lower end of the slide groove 61 (in this embodiment, the tappet 52 The lower end 52a) of the pin 37 is set to be positioned below the height position 64 of the pin 37 in a state where the tappet 52 is at the top dead center.
  • a tappet roller 51 is disposed in a region below the wall portion 60 of the inner diameter portion of the tappet 52.
  • the tappet roller 51 is rotatably supported by a pair of roller support portions 65 extending downward from the tappet 52 via a shaft bar 66.
  • the pair of roller support portions 65 are opposed to each other in the direction in which the rotation axis CL2 of the camshaft 13 extends, and the shaft rod 66 is located between the pair of roller support portions 65 along the rotation axis CL2 of the camshaft 13. Extends linearly. That is, the direction in which the shaft bar 66 extends (the direction in which the rotation axis CL3 of the tappet roller 51 extends) is set to be substantially parallel to the rotation axis CL2 of the camshaft 13 and orthogonal to the direction in which the slide groove 61 is recessed. Is done.
  • the tappet roller 51 abuts on the supply pump drive cam 14 while being biased toward the lower supply pump drive cam 14.
  • the tappet roller 51 rotates around the rotation axis CL3, and the tappet roller 51, the tappet 52, and the plunger 54 reciprocate along the vertical direction. Pressurizes the fuel in the pump chamber of the pump body 53 and supplies it to the common rail 4 side. That is, the supply pump 50 converts the rotational motion of the camshaft 13 into the reciprocating motion of the tappet 52, reciprocates the plunger 54 using the reciprocating motion of the tappet 52, pressurizes the fuel, and supplies the fuel to the common rail 4. To do. Oil is supplied to the outer peripheral surface 52c of the tappet 52 and the tappet roller 51 of the supply pump 50 from an oil passage (not shown).
  • the tappet 52 supporting the tappet roller 51 is first inserted into the pump insertion hole 35 of the adapter 30 from above and from the lower end of the slide groove 61 of the tappet 52.
  • the pin 37 of the adapter 30 is inserted and engaged.
  • the plunger 54 is inserted into the pump insertion hole 35 of the adapter 30 from above, and the flange portion 53a of the pump main body 53 is fastened and fixed to the adapter 30 so that the supply pump 50 and the adapter 30 are unitized.
  • the cylinder portion 31 of the adapter 30 unitized with the supply pump 50 is inserted into the adapter insertion hole 22 of the camshaft housing 20 of the engine 1 from above, and the flange portion 32 of the adapter 30 is inserted into the camshaft housing 20. Fasten and fix against.
  • the method for assembling the supply pump 50 to the engine 1 is not limited to the above. For example, first, the adapter 30 is fastened and fixed to the camshaft housing 20, and then the supply pump is fixed to the adapter 30. The method of fixing 50 may be used.
  • the protruding portion 39 of the pin 37 of the adapter 30 protrudes radially inward from the inner peripheral surface 31b of the cylinder portion 31, and the outer peripheral surface 52c of the tappet 52 of the supply pump 50. It engages with the slide groove 61 formed in the.
  • the direction in which the rotation axis CL3 of the tappet roller 51 extends is set substantially parallel to the rotation axis CL2 of the camshaft 13.
  • the direction of the rotation axis CL3 of the tappet roller 51 is the desired direction (in this embodiment, the camshaft 13 A protrusion 39 on the adapter 30 side and a slide groove 61 on the supply pump 50 side are arranged so as to be in a direction substantially parallel to the rotation axis CL2. Therefore, when the supply pump 50 is attached to the adapter 30, the rotation groove CL 2 of the camshaft 13 and the tappet roller 51 of the supply pump 50 are engaged by engaging the slide groove 61 of the tappet 52 and the pin 37 of the adapter 30.
  • the rotation axis CL3 can be easily positioned so as to be substantially parallel to each other.
  • the engagement between the slide groove portion 61 of the tappet 52 and the protruding portion 39 of the pin 37 of the adapter 30 is the rotational movement of the tappet 52 relative to the adapter 30 (movement of the tappet 52 in the circumferential direction (direction intersecting the slide groove portion 61)). ). Therefore, the substantially parallel positional relationship between the rotation axis CL2 of the camshaft 13 and the rotation axis CL3 of the tappet roller 51 of the supply pump 50 changes in the rotation direction when the supply pump 50 is driven (when the tappet 52 reciprocates). Thus, it can be prevented that the supply pump drive cam 14 and the tappet roller 51 are burned.
  • the protruding portion 39 of the pin 37 of the adapter 30 is disposed in a region 36 of the cylinder portion 31 that is inserted into the adapter insertion hole 22 of the camshaft housing 20. For this reason, even if oil flows out from the pin insertion hole 38 of the adapter 30 to the outside of the cylinder portion 31, the oil does not flow out of the engine 1 (outside of the camshaft housing 20), and the oil flows to the camshaft housing. 20 can be retained within the camshaft housing 20 to prevent the oil from flowing out of the camshaft housing 20.
  • the adapter 30 is provided between the camshaft housing 20 and the supply pump 50, and the inner peripheral surface 31b of the cylinder portion 31 of the adapter 30 supports the tappet 52 in a slidable manner. Even if the inner peripheral surface 31b of the portion 31 is damaged, it can be dealt with by replacing the adapter 30, and it is necessary to replace the camshaft housing 20, unlike the case where the supply pump 50 is directly attached to the camshaft housing 20. There is no.
  • a part of the cylinder block 1a of the engine 1 is made to function as the camshaft housing 20, but the camshaft housing 20 is not limited to this, for example, the inside of the cylinder head of the engine 1 Alternatively, the camshaft 13 may be arranged so that a part of the cylinder head of the engine 1 functions as the camshaft housing 20.
  • the direction in which the adapter insertion hole 22 of the camshaft housing 20 and the pump insertion hole 35 of the adapter 30 extend is the vertical direction, but the predetermined direction is limited to this. Instead, any other direction may be used as long as the direction is orthogonal to the rotation axis CL2 of the camshaft 13.
  • the camshaft 13 having a plurality of cams (a plurality of intake valve drive cams 17, a plurality of exhaust valve drive cams 18, a feed pump drive cam 19, and a supply pump drive cam 14) is provided.
  • the camshaft 13 is not limited to this, and any camshaft 13 having at least a supply pump drive cam (cam) 14 may be used.
  • a pin insertion hole 38 is provided in the cylinder portion 31 of the adapter 30, the pin 37 is press-fitted into the pin insertion hole 38, and the pin 37 protrudes radially inward from the inner peripheral surface 31 b of the cylinder portion 31.
  • the protrusion part 39 was formed by making it, the protrusion part 39 is not limited to this.
  • a bolt insertion hole is provided in the cylinder portion 31, a bolt is screwed into the bolt insertion hole from the outside, and the tip end side of the bolt protrudes radially inward from the inner peripheral surface 31 b of the cylinder portion 31.
  • a part may be formed.
  • a protruding portion that protrudes radially inward from the inner peripheral surface 31 b of the cylinder portion 31 may be integrally formed with the cylinder portion 31.
  • the protruding portion 39 of the pin 37 protrudes in a direction orthogonal to the rotation axis CL2 of the camshaft 13 when viewed from above.
  • the protruding portion 39 is provided at the portion of the cylinder portion 31 that intersects the imaginary line orthogonal to the rotation axis CL2 of the camshaft 13 in the top view, but the position where the protruding portion 39 is provided is It is not limited to this,
  • the protrusion part 39 can be provided in the arbitrary positions of the circumferential direction of the cylinder part 31. FIG.
  • the slide groove portion 61 provided in the tappet 52 can also be provided at an arbitrary position in the circumferential direction of the outer peripheral surface 52 c of the tappet 52. That is, with the protrusion 39 on the adapter 30 side and the slide groove 61 on the supply pump 50 side engaged, the direction of the rotation axis CL3 of the tappet roller 51 is the desired direction (in this embodiment, the camshaft 13
  • the protruding portion 39 on the adapter 30 side and the slide groove portion 61 on the supply pump 50 side can be arranged so as to be in a direction substantially parallel to the rotation axis CL2.
  • the lower side of the slide groove 61 is opened downward from the lower end 52a of the tappet 52.
  • the slide groove 61 is a protrusion of the pin 37 on the adapter 30 side. What is necessary is just to have the length which accept
  • the fuel pump assembly structure according to the present disclosure is applied to the assembly structure of the supply pump 50 that is a high-pressure fuel pump.
  • the present invention is not limited to this. You may apply to an assembly structure.
  • this indication was demonstrated based on the said embodiment, this indication is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this indication. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present disclosure.
  • the fuel pump assembly structure according to the present disclosure is applied to the diesel engine 1, but may be applied to a gasoline engine. Further, the present invention may be applied to an engine that does not include a common rail fuel injection system.
  • the fuel pump assembly structure of the present disclosure is useful in terms of preventing oil leakage while preventing rotation of the tappet.

Landscapes

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

Abstract

Dans la présente invention, un logement d'arbre à cames comporte un trou d'insertion d'adaptateur pénétrant le long de la direction haut-bas, et l'ouverture interne du trou d'insertion d'adaptateur s'ouvre vers une came d'entraînement de pompe d'alimentation. Un adaptateur présente une partie cylindre en forme de tube et une broche fixée à la partie cylindre, et l'adaptateur est fixé au logement d'arbre à cames. La broche présente une partie saillante qui fait saillie radialement vers l'intérieur à partir de la surface périphérique interne de la partie cylindre. Une section rainure de coulissement qui s'étend linéairement le long de la direction haut-bas est formée dans la surface périphérique externe d'un poussoir d'une pompe d'alimentation. La section rainure de coulissement permet l'insertion de la partie saillante de la broche et vient en prise avec la partie saillante, et permet un mouvement de va-et-vient du poussoir. La mise en prise entre la section rainure de coulissement et la partie saillante de la broche régule le mouvement de rotation du poussoir par rapport à l'adaptateur.
PCT/JP2019/001828 2018-01-31 2019-01-22 Structure d'assemblage de pompe à carburant WO2019151039A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980010870.8A CN111655999B (zh) 2018-01-31 2019-01-22 燃料泵组装构造

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018015894A JP7022380B2 (ja) 2018-01-31 2018-01-31 燃料ポンプ組付構造
JP2018-015894 2018-01-31

Publications (1)

Publication Number Publication Date
WO2019151039A1 true WO2019151039A1 (fr) 2019-08-08

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JP (1) JP7022380B2 (fr)
CN (1) CN111655999B (fr)
WO (1) WO2019151039A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
GB2617853A (en) * 2022-04-21 2023-10-25 Delphi Tech Ip Ltd Drive assembly for a fuel pump with roller tappet

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JPS63272959A (ja) * 1987-04-30 1988-11-10 ゲブリユーター　ズルツアー　アクチエンゲゼルシヤフト 往復動ディーゼル機関用燃料噴射ポンプ
JPH03294653A (ja) * 1990-04-12 1991-12-25 Nippondenso Co Ltd 燃料噴射ポンプ
JPH06159192A (ja) * 1992-08-22 1994-06-07 Robert Bosch Gmbh 内燃機関に用いられる燃料噴射ポンプ
JPH07332186A (ja) * 1994-06-09 1995-12-22 Nippondenso Co Ltd 高圧供給ポンプ

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US6171081B1 (en) * 1998-02-17 2001-01-09 Keihin Corporation Fuel pump assembly
JP4169052B2 (ja) * 2006-06-29 2008-10-22 トヨタ自動車株式会社 内燃機関の燃料供給装置
JP5478051B2 (ja) * 2008-10-30 2014-04-23 日立オートモティブシステムズ株式会社 高圧燃料供給ポンプ
JP2012072704A (ja) * 2010-09-29 2012-04-12 Ntn Corp ポンプ用タペット
JP5459329B2 (ja) * 2012-01-31 2014-04-02 株式会社デンソー サプライポンプ
DE102013201335A1 (de) * 2013-01-29 2014-07-31 Schaeffler Technologies Gmbh & Co. Kg Stößel
EP3073066B1 (fr) * 2015-03-27 2017-10-18 Aktiebolaget SKF Suiveur de came, pompe à injection et actionneur de soupape comprenant un tel suiveur de came et procédé de fabrication

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Publication number Priority date Publication date Assignee Title
JPS63272959A (ja) * 1987-04-30 1988-11-10 ゲブリユーター　ズルツアー　アクチエンゲゼルシヤフト 往復動ディーゼル機関用燃料噴射ポンプ
JPH03294653A (ja) * 1990-04-12 1991-12-25 Nippondenso Co Ltd 燃料噴射ポンプ
JPH06159192A (ja) * 1992-08-22 1994-06-07 Robert Bosch Gmbh 内燃機関に用いられる燃料噴射ポンプ
JPH07332186A (ja) * 1994-06-09 1995-12-22 Nippondenso Co Ltd 高圧供給ポンプ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2617853A (en) * 2022-04-21 2023-10-25 Delphi Tech Ip Ltd Drive assembly for a fuel pump with roller tappet

Also Published As

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CN111655999A (zh) 2020-09-11
CN111655999B (zh) 2022-10-28
JP7022380B2 (ja) 2022-02-18
JP2019132211A (ja) 2019-08-08

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