WO2010122963A1 - Pompe d'injection de carburant - Google Patents

Pompe d'injection de carburant Download PDF

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Publication number
WO2010122963A1
WO2010122963A1 PCT/JP2010/056868 JP2010056868W WO2010122963A1 WO 2010122963 A1 WO2010122963 A1 WO 2010122963A1 JP 2010056868 W JP2010056868 W JP 2010056868W WO 2010122963 A1 WO2010122963 A1 WO 2010122963A1
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WO
WIPO (PCT)
Prior art keywords
lubricating oil
oil discharge
passage
pump housing
cover
Prior art date
Application number
PCT/JP2010/056868
Other languages
English (en)
Japanese (ja)
Inventor
雅道 田中
裕二 芝
義明 柴田
勲 高岸
栄太 呉服
政樹 南光
Original Assignee
ヤンマー株式会社
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
Priority claimed from JP2009102513A external-priority patent/JP5255506B2/ja
Priority claimed from JP2009217565A external-priority patent/JP5350155B2/ja
Application filed by ヤンマー株式会社 filed Critical ヤンマー株式会社
Priority to CN201080017364.0A priority Critical patent/CN102405345B/zh
Publication of WO2010122963A1 publication Critical patent/WO2010122963A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—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
    • 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
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil

Definitions

  • the present invention relates to a fuel injection pump of a fuel injection device mounted on an engine.
  • a fuel injection pump having a configuration in which a camshaft supported by a pump housing is driven by a crankshaft of an engine, a plunger is reciprocated vertically by a cam provided on the camshaft, and fuel is pumped by the plunger. It is publicly known (see, for example, Patent Document 1).
  • This fuel injection pump stores lubricating oil in a cam chamber formed in the lower part of the pump housing and lubricates drive system components such as a cam housed in the cam chamber.
  • the fuel injection pump has a lubricating oil discharge hole formed in the pump housing so that the lubricating oil can be discharged from the cam chamber into the gear case connected to the pump housing through the lubricating oil discharge hole. It is configured.
  • the lubricating oil discharged to the gear case lubricates the power transmission means for transmitting power from the crankshaft of the engine to the camshaft of the fuel injection pump in the gear case, and lubricates the crankshaft, piston, etc. in the engine. Used for.
  • the plunger barrel is fitted to the hydraulic head on the pump housing, and the plunger is inserted into the plunger barrel so as to be slidable up and down.
  • a pressure chamber (fuel pressure chamber) is formed above the plunger in the plunger barrel.
  • a spring for urging the plunger downward is wound around the lower portion of the plunger below the plunger barrel, and a tappet is connected thereto.
  • the tappet is inserted into the tappet chamber so as to be slidable up and down, and is pressed against the cam.
  • the tappet chamber is formed above the cam chamber of the pump housing and communicates with the cam chamber.
  • the lubricating oil enters the cam chamber in the pump housing as a droplet through the lubricating oil discharge hole formed in the pump housing, and the lubricating oil in the cam chamber In some cases, the amount of splashes increased.
  • the splash of lubricating oil 82 reaches and adheres to the lower part of the plunger 81, and the vertical reciprocation of the plunger 81 causes lubrication.
  • the oil 82 moves upward through the gap between the plunger 81 and the plunger barrel 80 and enters the fuel 83 via the leak return groove 80 a of the fuel 83.
  • the lubricating oil 82 may continue to rise and enter the pressurizing chamber and get mixed into the fuel 83. Therefore, the amount of the lubricating oil 82 mixed into the fuel 83 is increased, and there is a possibility that problems such as blackening of the fuel 83 and deterioration of engine performance may occur.
  • the present invention makes it difficult for the splash of lubricant oil from the gear case side connected to the pump housing to enter the pump housing, and prevents the lubricant oil generated due to the splash of lubricant oil from being mixed into the fuel. It aims at providing the fuel injection pump which can be suppressed.
  • the present invention is a fuel injection pump provided with a pump housing that is connected to a gear case, wherein the pump housing has a communication hole that communicates the inside of the pump housing and the gear case, and a groove portion that is connected to the communication hole. And a cover that is mounted to the pump housing and covers a part of the communication hole and the groove part from the gear case side.
  • the communication hole, the groove part, and the cover allow the inside of the pump housing and the gear case.
  • a bent-shaped communication path is formed to communicate with each other.
  • a through hole that constitutes a part of the communication path is formed in the cover, and is arranged so as to be shifted from a position facing the communication hole.
  • a lubricating oil reservoir that can store lubricating oil is provided in the middle of the communication path and between the pump housing and the cover.
  • a cam chamber for storing a cam is formed in the pump housing, and a tappet chamber for storing a tappet in contact with the cam is formed to communicate with the cam chamber, and the cam chamber and the tappet chamber A blocking portion for blocking these communication was formed between the tappet and the plunger side.
  • the communication hole serves as a first lubricant discharge passage
  • the through hole serves as a third lubricant discharge passage
  • a portion of the communication passage excluding the communication hole and the through hole serves as a second lubricant discharge passage.
  • Lubricating oil for discharging into the gear case from the pump housing through the first lubricating oil discharge passage, the second lubricating oil discharge passage, and the third lubricating oil discharge passage in order.
  • a discharge passage is configured, and a passage area of the second lubricant discharge passage and a passage area of the third lubricant discharge passage are made smaller than the passage area of the first lubricant discharge passage, respectively.
  • the passage area of the third lubricating oil discharge passage is made smaller than the passage area of the second lubricating oil discharge passage.
  • the third lubricating oil discharge passage is provided below the first lubricating oil discharge passage.
  • a concave portion or a convex portion that can be fitted into a convex portion or a concave portion formed in the pump housing is provided in the cover, and the cover is attached to the pump housing so as to be positioned.
  • the present invention since the communication path is connected so as to be bent with respect to the communication hole, the flow direction of the lubricating oil between the communication path and the communication hole is changed, and the splash of the lubricating oil from the gear case side is generated. It becomes difficult to enter the pump housing through the communication hole.
  • the pulsation pressure is attenuated when propagating from the gear case side to the fuel injection pump, and the pulsation pressure of the fuel injection pump is reduced. Therefore, the present invention can reduce the amount of splashing of lubricating oil in the pump housing, and can suppress the mixing of the lubricating oil caused by the splashing of lubricating oil into the fuel.
  • the present invention since the communication path is bent by the through hole, the flow direction of the lubricating oil changes in the middle of the communication path, and the splash of the lubricating oil from the gear case side passes through the communication hole in the pump housing. It becomes difficult to get into. Therefore, the present invention can reduce the amount of splashing of lubricating oil in the pump housing, and can suppress the mixing of the lubricating oil caused by the splashing of lubricating oil into the fuel.
  • the end of the cover can be attached to the pump housing using a fastener. Therefore, the present invention can improve the vibration resistance of the cover.
  • the pulsation pressure accompanying the vertical movement of the piston of the diesel engine is attenuated by the lubricating oil accumulated in the lubricating oil reservoir, and is difficult to propagate from the gear case side to the pump housing. Therefore, the present invention can reduce the amount of splashing of lubricating oil in the pump housing, and can suppress the mixing of the lubricating oil caused by the splashing of lubricating oil into the fuel.
  • the splash of lubricating oil in the pump housing is less likely to enter the plunger side than the tappet in the tappet chamber where there is a pressurizing chamber to which fuel is supplied from the cam chamber. Therefore, according to the present invention, it is possible to suppress the mixing of the lubricating oil generated in the fuel due to the splashing of the lubricating oil in the pump housing.
  • the passage area on the gear case side of the lubricating oil discharge passage is smaller than the passage area on the pump housing side, and the lubricating oil tends to accumulate in the third lubricating oil discharge passage. Therefore, the pulsation pressure accompanying the vertical movement of the piston of the diesel engine is attenuated by the lubricating oil accumulated in the third lubricating oil discharge passage, and is difficult to propagate from the gear case side to the pump housing. Therefore, the present invention can reduce the amount of splashing of lubricating oil in the pump housing, and can suppress the mixing of the lubricating oil caused by the splashing of lubricating oil into the fuel.
  • the present invention since the passage area on the gear case side of the lubricating oil discharge passage gradually decreases toward the gear case side, the lubricating oil is likely to accumulate in the third lubricating oil discharge passage. Therefore, the pulsation pressure accompanying the vertical movement of the piston of the diesel engine is attenuated by the lubricating oil accumulated in the third lubricating oil discharge passage, and is difficult to propagate from the gear case side to the pump housing. Therefore, the present invention can reduce the amount of splashing of lubricating oil in the pump housing, and can suppress the mixing of the lubricating oil caused by the splashing of lubricating oil into the fuel.
  • the present invention when the lubricating oil is discharged from the pump housing into the gear case, the lubricating oil discharge passage flows down from above. Therefore, the present invention can improve the lubrication performance of the fuel injection pump by smoothing the flow of the lubricating oil.
  • the cover can be easily attached. Therefore, the present invention can efficiently perform the assembly operation of the fuel injection pump.
  • 1 is a right side cross-sectional view showing an overall configuration of a fuel injection pump according to an embodiment of the present invention.
  • 1 is a front sectional view showing an overall configuration of a fuel injection pump according to an embodiment of the present invention.
  • A The front view which shows the flange which concerns on 1st embodiment.
  • B The front view which shows the state which attached the cover of the flange which concerns on 1st embodiment.
  • A The perspective view of the flange and cover which concern on 1st embodiment.
  • B The perspective view which shows the state which attached the cover of the flange which concerns on 1st embodiment.
  • A The front view which shows a cover.
  • B The right view which shows a cover.
  • FIG. 17 is a view on arrow A in FIG. 16.
  • the front-rear direction is defined with the direction indicated by the arrow F in FIG. 1 as the front of the fuel injection pump 1
  • the vertical direction is defined with the direction indicated by the arrow U in FIG.
  • the left-right direction is defined with the direction indicated by the arrow L in FIG.
  • the fuel injection pump 1 is a component of a fuel injection device mounted on a diesel engine. After pressurizing fuel supplied from a fuel tank, a predetermined amount of fuel is supplied to a fuel injection valve via an injection pipe at a predetermined timing. To pump. As shown in FIGS. 1 and 2, the fuel injection pump 1 is a distributed fuel injection pump that distributes and pumps fuel to a plurality of fuel injection valves.
  • the fuel injection pump 1 is configured by vertically joining a hydraulic head 2 and a pump housing 3.
  • the plunger barrel 4 is inserted into the hydraulic head 2.
  • a plunger 5 is housed so as to be slidable up and down.
  • a cold start timer mechanism 6 is provided on the left front side of the plunger barrel 4
  • an accumulator 7 is provided on the right side of the plunger barrel 4.
  • a pressurizing chamber 8 is formed between the plunger barrel 4 and the upper end portion of the plunger 5.
  • a leak return groove 4 a is formed in order to reduce a phenomenon (fuel leak) in which fuel leaks from the gap with the plunger 5 and enters the lubricating oil.
  • the leak return groove 4a communicates with a fuel tank (not shown).
  • a tappet chamber 20 is formed at the front upper part of the pump housing 3 and a lower end portion of the plunger barrel 4 is inserted. From the lower end of the plunger barrel 4, the plunger 5 protrudes downward toward the tappet chamber 20.
  • An upper spring receiver 21 is fixed to the outer periphery of the lower end portion of the plunger barrel 4.
  • a lower spring receiver 22 is fixed to the lower end portion of the plunger 5.
  • a spring 23 is provided between the upper surface of the lower spring receiver 22 and the lower surface of the upper spring receiver 21 to apply a downward urging force to the plunger 5.
  • a tappet 24 is provided at the lower end portion of the plunger 5 so as to be able to reciprocate in the vertical direction in the tappet chamber 20.
  • the tappet 24 has a cylindrical shape opened upward.
  • a lower spring receiver 22 is fixed in the tappet 24.
  • the tappet 24 is urged downward together with the plunger 5 by the spring 23 via the lower spring receiver 22.
  • a roller portion 25 is pivotally supported by a lower portion of the tappet 24 via a roller shaft 26.
  • An adjustment shim 27 is provided between the upper surface in the tappet 24 and the lower surface of the lower spring receiver 22.
  • a rack chamber 30 is formed in the rear upper part of the pump housing 3.
  • the rack chamber 30 has a rack.
  • a distribution shaft 31 is inserted into the rear portion of the hydraulic head 2 in the vertical direction.
  • a lower end portion of the distribution shaft 31 protrudes into the rack chamber 30.
  • a transmission shaft 32 is fixed to the lower end portion of the distribution shaft 31 via a joint 33 on the same axis as the distribution shaft 31.
  • the transmission shaft 32 is installed on the pump housing 3 in the vertical direction and is rotatably supported.
  • the upper end portion of the transmission shaft 32 is pivotally supported by the shaft support portion 34 of the pump housing 3, and the position in the axial direction (vertical direction) is positioned by the positioning member 35.
  • the distribution shaft 31 and the pressurizing chamber 8 are communicated with each other by an oil passage 9 formed in the hydraulic head 2.
  • the delivery valve 10 is provided on the rear side of the distribution shaft 31 via the holder 11. The delivery valve 10 prevents the fuel in the injection pipe from flowing into the pressurizing chamber 8 at the end of the injection of the fuel injection pump 1.
  • a cam chamber 40 is formed in the lower part of the pump housing 3.
  • a cam shaft 41 is installed in the cam chamber 40 with the axial direction as the front-rear direction.
  • the cam shaft 41 is rotatably supported by the pump housing 3 via a first cam bearing 42 and a second cam bearing 43.
  • the cam chamber 40 is filled with lubricating oil.
  • the cam 44 on the cam shaft 41 is lubricated by the cam chamber 40 lubricating oil.
  • the cam 44 is disposed at the front portion of the cam chamber 40 and contacts the front roller portion 25.
  • a bevel gear 45 fixed to the cam shaft 41 is accommodated. From the upper surface of the cam chamber 40, the transmission shaft 32 protrudes downward toward the cam chamber 40. A bevel gear 46 that meshes with the bevel gear 45 on the cam shaft 41 is fixed to the lower end portion of the transmission shaft 32.
  • the cam shaft 41 protrudes rearward from the rear portion of the pump housing 3 toward the outside of the pump housing 3.
  • a governor sleeve 12 and a governor weight 13 constituting a governor mechanism are provided at a rear projecting portion of the cam shaft 41.
  • a flange 3a is formed in the front part of the pump housing 3 (in front of the cam chamber 40).
  • the cam shaft 41 protrudes forward from the flange 3a into the gear case 50.
  • the gear case 50 is disposed in front of the pump housing 3, is connected to the pump housing 3, and is attached to the engine body of the diesel engine.
  • a cam shaft fixing flange 52 is fixed to the front end portion of the cam shaft 41.
  • a cam gear 51 is fixed to the cam shaft fixing flange 52 by a bolt 53. The power from the crankshaft of the diesel engine can be transmitted to the power transmission means in the gear case 50 and the camshaft 41 via the cam gear 51 and the like.
  • the flange 3a is formed with two lubricating oil discharge holes 3i and 3j which are communication holes for communicating the inside of the pump housing 3, that is, the cam chamber 40 and the gear case 50.
  • the lubricating oil in the cam chamber 40 is discharged into the gear case 50 through the two lubricating oil discharge holes 3i and 3j.
  • a cover 60 to be described later is attached to the outside of the flange 3a so as to face these lubricating oil discharge holes 3i and 3j.
  • the cam 44 rotates with the rotation of the camshaft 41.
  • the tappet 24 reciprocates in the vertical direction, and the plunger 5 reciprocates in the vertical direction via the lower spring receiver 22 fixed to the tappet 24.
  • the reciprocating motion of the plunger 5 alternately performs the fuel suction stroke into the pressurizing chamber 8 and the fuel discharge stroke from the pressurizing chamber 8. That is, in the intake stroke, when the plunger 5 is pushed down by the urging force of the spring 23 and descends, the fuel from the fuel tank (feed pump) is sucked into the pressurizing chamber 8.
  • the fuel sucked into the pressurizing chamber 8 is pressurized and fed to the distribution shaft 31 through the oil passage 9.
  • the fuel pressure-fed to the distribution shaft 31 is distributed to the delivery valve 10 by the distribution shaft 31 and injected from the fuel injection valve through the injection pipe.
  • the flange 3a is formed in a substantially triangular shape when viewed from the front.
  • a through hole 3d is formed in a substantially circular shape in front view at the center of the flange 3a.
  • the cam shaft 41 is inserted into the through hole 3 d and supported through the second cam bearing 43.
  • an annular boss 3b is formed on the outer periphery of the through hole 3d so as to protrude forward. The boss portion 3b can be fitted into a through hole 50a formed in the rear surface of the gear case 50.
  • a groove 3e extends along the circumferential direction of the boss 3b on the front surface of the boss 3b, and a part of the ring is notched in front view. It is formed in a substantially C shape in front view that opens to the right.
  • the groove 3e opens forward so as to face the gear case 50 side.
  • a plurality of convex partition walls 3f, 3f,... are arranged at predetermined intervals in the circumferential direction of the boss 3b.
  • the groove 3e is partitioned into a first groove, a second groove, a third groove, a fourth groove, and a fifth groove by a plurality of partition walls 3f, 3f,.
  • groove portions are arranged in the order of the first groove portion, the second groove portion, the third groove portion, the fourth groove portion, and the fifth groove portion in the clockwise direction in front view from one end located at the upper right portion of the groove portion 3e.
  • a mounting hole 3g of the cover 60 is formed in the uppermost part (first groove part) of the groove part 3e.
  • a mounting hole 3h of the cover 60 is formed in the lowermost portion (fourth groove portion) of the groove portion 3e.
  • a first lubricating oil discharge hole 3i extends linearly in the front-rear direction at the bottom of the upper right part (first groove part) in the groove part 3e, faces the cam chamber 40 on the rear end side, and is pumped on the front end side. It is formed so as to face in a gear case 50 connected to the housing 3.
  • a second lubricating oil discharge hole 3j extends linearly in the front-rear direction, faces the cam chamber 40 on the rear end side, and communicates with the pump housing 3 on the front end side. It is formed so as to face the provided gear case 50.
  • the first lubricating oil discharge hole 3 i and the second lubricating oil discharge hole 3 j respectively penetrate the flange 3 a in the front-rear direction and communicate with the cam chamber 40 and the gear case 50 in the pump housing 3. That is, the cam chamber 40 in the pump housing 3 communicates with the gear case 50 through the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j.
  • the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j are respectively higher than the horizontal line passing through the axis of the cam shaft 220 in the front view of the fuel injection pump 1. Or at a height position such that the lower end of the horizontal line is applied.
  • the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j can appropriately discharge the lubricating oil from the pump housing 3 into the gear case 50 according to the amount of the lubricating oil in the pump housing 3. It can be done.
  • the cover 60 is in a direction perpendicular to the flow direction of the lubricating oil in the first lubricating oil discharge hole 3 i and the second lubricating oil discharge hole 3 j, that is, the front-rear direction. It is formed of a resin or metal plate having a flat surface extending in a substantially C shape in front view with a part of the ring cut out.
  • the cover 60 has a shape similar to that of the groove 3e in a front view, and the surface area is set slightly smaller than that of the groove 3e.
  • the circumferential length of the cover 60 is set shorter than the circumferential length of the groove 3e.
  • the cover 60 is configured to be uneven with a first flat portion 60a, a first concave portion 60b recessed backward, a second flat portion 60e, and a second concave portion 60f recessed backward.
  • each part is arranged in the clockwise direction from the one end located at the upper right part of the cover 60 in the clockwise direction when viewed from the front. It arrange
  • the cover 60 is fitted into the groove 3e so that the first recess 60b is located at the top, the second recess 60f is located at the bottom, and the second flat surface 60e is located at the left. .
  • the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j are covered from the gear case 50 side by the cover 60 in a front view.
  • the first lubricating oil discharge hole 3i is covered from the gear case 50 side by the first flat portion 60a of the cover 60
  • the second lubricating oil discharge hole 3j is covered from the gear case 50 side by the second flat portion 60e.
  • Mounting holes 60c and 60g are formed in the front-rear direction at the upper, lower, left and right centers of the recesses 60b and 60f.
  • the attachment holes 60c and 60g are used to attach the cover 60 to the flange 3a when the cover 60 is fitted into the groove 3e.
  • a discharge hole 60h which is a through hole, is formed in the front-rear direction below the second flat surface portion 60e.
  • the cover 60 is fitted into the groove 3e of the flange 3a as described above after aligning the two mounting holes 60c and 60g with the mounting holes 3g and 3h of the groove 3e, respectively.
  • the cover 60 is attached to the flange 3a by inserting bolts 61 and 61, which are fasteners, from the front into the attachment holes 60c and 60g and screwed into the attachment holes 3g and 3h (FIG. 3B). And FIG. 4B).
  • the cover 60 is disposed so as to face the first lubricating oil discharge hole 3 i and is disposed so as to face the gear case 50.
  • the first flat surface portion 60a of the cover 60 is aligned with the first groove portion of the groove portion 3e and the first lubricating oil discharge hole 3i. It will be arranged at the position. In other words, the first groove portion of the groove portion 3e and the first flat surface portion 60a are overlapped in front view, and the first lubricating oil discharge hole 3i and the first flat surface portion 60a overlap in front view. Will be placed. As a result, the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j do not communicate with the gear case 50 in a straight line.
  • the cover 60 comes into contact with the partition walls 3f, 3f..., And spaces are formed between the cover 60 and the groove portions of the groove portion 3e except for the contact portions.
  • the first space formed between the first flat surface portion 60a of the cover 60 and the first groove portion of the groove portion 3e constitutes a part of the first series passage 3m.
  • This first space is arranged so as to extend in a direction (substantially up and down direction) orthogonal to the direction (front and rear direction) in which the first lubricating oil discharge hole 3 i extends.
  • a discharge hole 60d as a through hole constituting a part of the first series passage 3m is formed in the front-rear direction in the lower right portion of the first flat portion 60a of the cover 60.
  • the discharge hole 60d is a notch hole, and is arranged to be shifted to the lower right from the position facing the second lubricant discharge hole 3j.
  • the discharge hole 60d creates a gap between the flange 3a and the cover 60, and the first space communicates with the inside of the gear case 50 through the discharge hole 60d.
  • the first series passage 3m is constituted by the first space and the discharge hole 60d, and is connected so as to be bent with respect to the first lubricant discharge hole 3i via the cover 60 and the pump housing 3. Is done.
  • the first series passage 3m is communicated with the cam chamber 40 in the pump housing 3 through the first lubricant discharge hole 3i, and the first lubricant discharge hole 3i is in the gear case 50 through the first series passage 3m. Communicated with. That is, the cam chamber 40 in the pump housing 3 and the gear case 50 communicate with each other through the first lubricating oil discharge hole 3i and the first series passage 3m.
  • the lubricating oil flows from the cam chamber 40 in the pump housing 3 through the first lubricating oil discharge hole 3i to the first series from the first lubricating oil discharge hole 3i.
  • the flow direction of the first flat portion 60a of the cover 60 is changed from the front-rear direction to the substantially vertical direction, and the first series passage 3m is directed to the lower right of the first lubricating oil discharge hole 3i. Flowing.
  • the flow direction of the lubricating oil changes from the substantially vertical direction to the front-rear direction on the inner peripheral surface of the first groove portion, and flows into the gear case 50 from the discharge hole 60d.
  • the first lubricating oil discharge hole 3i and the first series passage 3m that is, the lubricating oil discharge passage (communication passage) is formed in a crank shape, and this lubricating oil discharge passage.
  • a bent portion 3x is formed in the middle. Therefore, when the lubricating oil is discharged from the first lubricating oil discharge hole 3i, the flow does not flow linearly into the gear case 50, but changes the flow direction and then flows to the first series passage 3m, and again flows in the flow direction. Then, the air flows into the gear case 50 through the discharge hole 60d.
  • the lubricating oil in the pump housing 3 changes the flow direction between the first lubricating oil discharge hole 3i and the first series passage 3m, and further changes the flow direction in the middle of the first series passage 3m.
  • the cam chamber 40 is discharged into the gear case 50 through the first lubricant discharge hole 3i and the first series passage 3m in this order.
  • the gear case 50 when the lubricating oil scatters to the first lubricating oil discharge hole 3i side of the pump housing 3 as indicated by the black arrow in FIG. In the vicinity of the position facing the discharge hole 3i, the first flat portion 60a of the cover 60 is prevented from entering the first lubricant discharge hole 3i. Further, even when the lubricant splashes reach the discharge hole 60d, the lubricant must flow in the lubricant discharge passage through the bent portion 3x in the direction of the lubricant flow, that is, in the direction opposite to the discharge direction. Since the flow direction must be changed between the series passage 3m and the first lubricating oil discharge hole 3i, it is difficult to enter the first lubricating oil discharge hole 3i.
  • the second flat surface portion 60e of the cover 60 is disposed at a position facing the third groove portion of the groove portion 3e and the second lubricating oil discharge hole 3j.
  • the third groove portion of the groove portion 3e and the first flat surface portion 60a are overlapped in front view, and the second lubricating oil discharge hole 3j and the second flat surface portion 60e overlap in front view. Will be placed.
  • the third space formed between the second flat surface portion 60e of the cover 60 and the third groove portion of the groove portion 3e constitutes a part of the second communication path 3n.
  • This third space is arranged so as to extend in a direction (substantially up and down direction) orthogonal to the direction (front and rear direction) in which the first lubricating oil discharge hole 3 i extends.
  • a discharge hole 60h as a through hole constituting a part of the second communication path 3n is formed in the front-rear direction in the lower part of the second flat surface portion 60e of the cover 60.
  • the discharge hole 60h is arranged so as to be shifted downward from the position facing the second lubricating oil discharge hole 3j.
  • the third space communicates with the inside of the gear case 50 through the discharge hole 60h.
  • the second communication path 3n is configured by the third space and the discharge hole 60h, and is connected so as to be bent with respect to the second lubricant discharge hole 3j via the space between the cover 60 and the pump housing 3. Is done.
  • the second communication passage 3n is communicated with the cam chamber 40 in the pump housing 3 through the second lubricant discharge hole 3j, and the second lubricant discharge hole 3j is in the gear case 50 through the second communication passage 3n. Communicated with. That is, the cam chamber 40 in the pump housing 3 and the gear case 50 are communicated with each other through the second lubricating oil discharge hole 3j and the second communication passage 3n.
  • the lubricating oil flows from the cam chamber 40 in the pump housing 3 through the second lubricating oil discharge hole 3j to the second continuous oil discharging hole 3j.
  • the flow direction of the second flat surface portion 60e of the cover 60 is changed from the front-rear direction to the substantially vertical direction, and the second communication passage 3n flows downward from the second lubricating oil discharge hole 3j.
  • the flow direction is changed from the substantially vertical direction to the front-rear direction on the inner peripheral surface of the third groove portion, and flows into the gear case 50 from the discharge hole 60h.
  • the second lubricating oil discharge hole 3j and the second communication path 3n that is, the lubricating oil discharge path (communication path) is formed in a crank shape, and this lubricating oil discharge path.
  • a bent portion 3y is formed in the middle. Therefore, when the lubricating oil is discharged from the second lubricating oil discharge hole 3j, the lubricating oil does not flow linearly into the gear case 50, but flows into the second communication path 3n after changing the flow direction, and again flows in the flow direction. Then, the air flows into the gear case 50 through the discharge hole 60h.
  • the lubricating oil changes the flow direction between the second lubricating oil discharge hole 3j and the second communication passage 3n, and further changes the flow direction in the middle of the second communication passage 3n.
  • the cam chamber 40 is discharged into the gear case 50 through the second lubricating oil discharge hole 3j and the second communication passage 3n in this order.
  • the fuel injection pump 1 can reduce the amount of lubricant splashed in the cam chamber 40.
  • the splash of the lubricating oil reaches and adheres to the lower part of the plunger 5, and the reciprocating motion of the plunger 5 causes the lubricating oil to pass through the gap between the plunger 5 and the plunger barrel 4. It is possible to prevent the fuel from entering the leak return groove 4a and the pressurizing chamber 8 and mixed into the fuel.
  • the flange 103a is formed in a substantially triangular shape when viewed from the front.
  • an annular boss portion 103b is formed at the front center portion so as to protrude forward.
  • a groove portion 103e having a substantially C shape in front view that is recessed rearward is formed.
  • a cover support portion 103k formed in a step shape is formed on the outer peripheral portion in the groove portion 103e.
  • a mounting hole 103g of the cover 70 is formed in the lower right portion of the groove 103e.
  • two lubricating oil discharge holes 103i and 103i which are through holes extend linearly in the front-rear direction, face the cam chamber 40 on the rear end side, and on the pump housing on the front end side 3 is formed so as to face in a gear case 50 provided continuously with the gear 3.
  • the two lubricating oil discharge holes 103i and 103i are arranged so as to sandwich the mounting hole 103g.
  • the cam chamber 40 in the pump housing 3 communicates with the gear case 50 through these lubricating oil discharge holes 103i and 103i.
  • the cover 70 is made of a resin or metal plate having a plane extending in a direction perpendicular to the flow direction of the lubricating oil in each lubricating oil discharge hole 103i, that is, the front-rear direction. Thus, it is formed in a substantially C shape when viewed from the front.
  • the cover 70 has a shape similar to a part of the groove 103e in a front view, and the surface area is set slightly smaller than a part of the groove 103e.
  • the circumferential length of the cover 70 is set shorter than the circumferential length of the groove 103e.
  • the cover 70 includes a flat surface portion 70a and a cutout portion 70c.
  • the flat portion 70 a is disposed over the entire circumferential direction of the cover 70
  • the cutout portion 70 c is disposed on the outer peripheral side of the midway portion of the cover 70 in the circumferential direction.
  • the cover 70 is fitted to the lower part of the groove part 103e so that the notch part 70c is located at the lowermost part.
  • the two lubricating oil discharge holes 103i and 103i are covered from the gear case 50 side by the cover 70 in a front view.
  • a mounting hole 70b for mounting the cover 70 to the flange 103a is formed in the front-rear direction at the center of the flat surface portion 70a.
  • Such a cover 70 is fitted into the groove 103e of the flange 103a as described above after the mounting hole 70b is aligned with the mounting hole 103g.
  • the cover 70 is attached to the flange 103a by inserting the bolts 61 and 61 into the attachment hole 70b from the outside of the pump housing 3 and screwing the attachment holes 103g.
  • the cover 70 is disposed so as to face the two lubricating oil discharge holes 103 i and 103 i and so as to face the gear case 50.
  • the flat portion 70a of the cover 70 is disposed at a position facing a part of the groove 103e and the two lubricating oil discharge holes 103i and 103i of the flange 103a.
  • a part of the groove 103e and the flat surface portion 70a are overlapped in the front view, and the two lubricating oil discharge holes 103i and 103i and the flat surface portion 70a are overlapped in the front view.
  • each lubricating oil discharge hole 103i and the inside of the gear case 50 are not communicated linearly.
  • the cover 70 comes into contact with the cover support portion 103k, and a space is formed between the flat portion 70a and the groove portion 103e of the cover 70 except for the contact portion.
  • This space constitutes a part of the communication path 103n.
  • This space is arranged so as to extend in a direction (substantially vertical direction) orthogonal to the direction (front-rear direction) in which the lubricant discharge hole 103 i extends.
  • discharge holes 70d and 70d as through-holes constituting a part of the communication path 103n are formed in the front-rear direction at the left and right ends of the flat portion 70a of the cover 70.
  • Each discharge hole 70d is a notch hole, and is arranged to be shifted to the left or upper right from the position facing each lubricant discharge hole 103i.
  • a gap is formed between the flange 103a and the cover 70, and the space communicates with the inside of the gear case 50 through the discharge holes 70d.
  • the communication path 103n is constituted by the space and the two discharge holes 70d and 70d, and is connected so as to be bent with respect to the respective lubricant discharge holes 103i via the cover 70 and the pump housing 3.
  • the communication passages 103n are communicated with the cam chamber 40 in the pump housing 3 via the respective lubricant discharge holes 103i, and the respective lubricant discharge holes 103i are communicated with the gear case 50 via the communication passages 103n. That is, the cam chamber 40 in the pump housing 3 and the gear case 50 are communicated with each other through the two lubricating oil discharge holes 103i and 103i and the communication passage 103n.
  • the lubricating oil flows from the cam chamber 40 in the pump housing 3 through the two lubricating oil discharge holes 103i and 103i, exits from the two lubricating oil discharge holes 103i and 103i to the communication path 103n, and then is a flat portion of the cover 70.
  • the flow direction is changed from the front-rear direction to the substantially vertical direction, and the communication passage 103n flows upward from the lubricating oil discharge holes 103i and flows into the gear case 50 from the discharge holes 70d and 70d.
  • the discharge hole 70d is arranged so as to be deviated from the directly facing position with respect to the lubricant discharge holes 103i and 103i.
  • the two lubricating oil discharge holes 103i and 103i and the communication passage that is, the lubricating oil discharge passage, which communicate between the cam chamber 40 in the pump housing 3 and the gear case 50 are formed in a crank shape, and the discharge of the lubricating oil is performed.
  • a bent portion is formed in the middle of the passage. Therefore, the lubricating oil discharged from each of the lubricating oil discharge holes 103i does not flow linearly toward the gear case 50, changes the flow direction and then flows to the communication path 103n, and passes through the discharge holes 70d to enter the gear case 50. It will flow toward.
  • the lubricating oil flows in the gear case from the cam chamber 40 in the pump housing 3 through the lubricating oil discharge holes 103i and the communication passages 103n in this order while changing the flow direction between the lubricating oil discharge holes 103i and the communication passages 103n. 50 will be discharged.
  • the lubricating oil flows through the communication path 103n, it accumulates in the space formed between the flat portions 70a of the cover 70 and flows into the gear case 50 through the discharge hole 70d.
  • the lubricating oil reservoir 103 p is provided between the pump housing 3 and the cover 70 in the middle of the discharge passage connecting the cam chamber 40 and the gear case 50.
  • the lubricating oil in the lubricating oil reservoir 103p flows into the gear case 50 through a gap formed between the notch 70c of the cover 70 and the groove 103e.
  • the lubricating oil splashes in the vicinity of the positions facing the respective lubricating oil discharge holes 103i are flat portions of the cover 70. In 70a, entry into each lubricating oil discharge hole 103i is prevented. Further, even when the lubricant splashes reach the discharge hole 70d, the lubricant passage must flow through the bent portion in the lubricant flow direction, that is, in the direction opposite to the discharge direction. Since the flow direction must be changed between the first lubricating oil discharge holes 3i, it is difficult to enter the respective lubricating oil discharge holes 103i.
  • the fuel injection pump 1 can reduce the amount of lubricant splashed in the cam chamber 40.
  • the splash of the lubricating oil reaches and adheres to the lower part of the plunger 5, and the reciprocating motion of the plunger 5 causes the lubricating oil to pass through the gap between the plunger 5 and the plunger barrel 4. It is possible to prevent the fuel from entering the leak return groove 4a and the pressurizing chamber 8 and mixed into the fuel.
  • the roller portion 25 of the tappet 24 is a cam. Since it rotates in contact with 44 and rotates, the lubricating oil supplied to the cam 44 is lifted by the rotation of the roller portion 25 and flows from the through holes 22a and 27a to the plunger 5 side of the tappet 24 in the tappet chamber 20.
  • the leakage return groove 4a or the pressurizing chamber 8 may be entered from the gap between the plunger 5 and the plunger barrel 4 and mixed into the fuel.
  • the lower spring receiver 22 and the adjustment shim 27 are not provided with vertical through holes.
  • the fuel injection pump 1 forms a blocking portion 28 between the roller portion 25 of the tappet 24 and the lower spring receiver 22 so that the lubricating oil adhering to the roller portion 25 of the tappet enters the tappet 24. This can prevent and reduce the amount of lubricating oil transferred into the fuel.
  • the fuel injection pump 1 includes the pump housing 3 connected to the gear case 50.
  • the pump housing 3 includes a first lubricating oil discharge hole 3 i and a second lubricating oil discharge hole 3 j (two lubricating oil discharge holes 103 i.
  • a curved communication path that is, the first lubricating oil discharge hole 3i and the first series passage 3m, and the second lubricating oil discharge hole 3j and the second communication path 3n (two lubricating oil discharge holes 103i and 103i and the communication path 103n). Configured.
  • first series passage 3m and the second communication passage 3n (communication passage 103n) are bent with respect to the first lubricant discharge hole 3i and the second lubricant discharge hole 3j (each lubricant discharge hole 103i), respectively.
  • the lubricating oil between the first series passage 3m and the second communication passage 3n (communication passage 103n) and the first lubricant discharge hole 3i and the second lubricant discharge hole 3j (each lubricant discharge hole 103i)
  • the splash of lubricating oil from the gear case 50 side enters the pump housing 3 through the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j (each lubricating oil discharge hole 103i).
  • the fuel injection pump 1 can reduce the amount of splashing of the lubricating oil in the pump housing 3 and suppress the mixing of the lubricating oil generated due to the splashing of the lubricating oil into the fuel.
  • the pulsation pressure in the pump housing 3 is, for example, as shown in FIG. 9A, in the gear case 50 of the diesel engine. It is attenuated to about 60% compared with the pulsation pressure.
  • the pulsation pressure in the pump housing 3 is, for example, as shown in FIG. 9B, in the gear case 50 of the diesel engine. As compared with the pulsation pressure, the pressure is attenuated to almost zero.
  • the fuel injection pump 1 covers a discharge hole 60d and a discharge hole 60h (two discharge holes 70d and 70d) which are through holes constituting part of the first series passage 3m and the second communication passage 3n (communication passage 103n).
  • the first lubricating oil discharge hole 3i and the second lubricating oil discharge hole 3j are arranged so as to be shifted from the positions facing each other.
  • the fuel injection pump 1 can reduce the amount of splashing of the lubricating oil in the pump housing 3 and suppress the mixing of the lubricating oil generated due to the splashing of the lubricating oil into the fuel.
  • the end of the cover 60 (cover 70) can be attached to the pump housing 3 using bolts 61 and 61. Therefore, the fuel injection pump 1 can improve the vibration resistance of the cover 60 (cover 70).
  • the fuel injection pump 1 can store lubricating oil in the middle of the second communication path 3n (communication path 103n) and between the flange 3a (flange 103a) of the pump housing 3 and the cover 60 (cover 70).
  • Lubricating oil reservoir 3p lubricating oil reservoir 103p is provided.
  • the fuel injection pump 1 can reduce the amount of splashing of the lubricating oil in the pump housing 3 and suppress the mixing of the lubricating oil generated due to the splashing of the lubricating oil into the fuel.
  • the fuel injection pump 1 forms a cam chamber 40 that houses a cam 44 in the pump housing 3, and a tappet chamber 20 that houses a tappet 24 in contact with the cam 44 so as to communicate with the cam chamber 40.
  • 40 and the tappet 24 of the tappet chamber 20 are formed between the plunger 5 side and the cam chamber 40 so as to prevent the communication between them.
  • the fuel injection pump 1 can suppress mixing of the lubricating oil generated in the fuel due to the splashing of the lubricating oil in the pump housing 3.
  • the front-rear direction is defined with the direction indicated by the arrow F in FIG. 11 as the front of the fuel injection pump 201
  • the vertical direction is defined with the direction indicated by the arrow U in FIG.
  • the left-right direction is defined with the direction indicated by the arrow R in FIG.
  • the fuel injection pump 201 is a component part of a fuel injection device mounted on a diesel engine. After pressurizing fuel supplied from a fuel tank, a predetermined amount of fuel is supplied to a fuel injection valve via an injection pipe at a predetermined timing. To pump. As shown in FIGS. 11 and 12, the fuel injection pump 201 is a distribution type fuel injection pump that distributes and pumps fuel to a plurality of fuel injection valves.
  • the plunger 210 is provided in the plunger barrel 211 so as to be slidable up and down.
  • the plunger barrel 211 is fitted into a hydraulic head 213 provided on the top of the pump housing 212.
  • a pressurizing chamber 214 is formed between the upper end of the plunger 210 and the plunger barrel 211.
  • a thermo element 215 serving as a cold start timer mechanism is provided on the right side of the plunger barrel 211 in the hydraulic head 213.
  • an accumulator 238 is provided on the left side of the plunger barrel 211.
  • the lower end of the plunger barrel 211 is inserted into a tappet chamber 121 formed at the top of the pump housing 212. From the lower end of the plunger barrel 211, the plunger 210 projects downward toward the tappet chamber 121.
  • An upper spring receiver 216 is fixed to the lower outer periphery of the plunger barrel 211.
  • a lower spring receiver 217 is fixed to the lower end portion of the plunger 210. Between the upper and lower portions of the upper spring receiver 216 and the lower spring receiver 217, a spring 218 that applies a downward biasing force to the plunger 210 is interposed. Further, a tappet 219 is provided at the lower end of the plunger 210 so as to be capable of sliding up and down in the tappet chamber 121.
  • the tappet 219 is a member formed in a substantially cylindrical shape with a bottom that opens upward.
  • a lower spring receiver 217 is fixed in the tappet 219.
  • the tappet 219 is urged downward together with the plunger 210 by the spring 218 via the lower spring receiver 217.
  • a roller 191 is pivotally supported below the tappet 219 via a roller shaft 192.
  • the roller 191 contacts the cam 221 on the cam shaft 220.
  • An adjustment shim 222 is provided between the lower spring receiver 217 and the tappet 219. The adjustment shim 222 adjusts the gap between the cam 221 and the tappet 219 to an appropriate value.
  • the cam 221 is fixed to the cam shaft 220 and is accommodated in the front portion of the cam chamber 122 formed in the lower portion of the pump housing 212.
  • the cam shaft 220 is installed in the cam chamber 122 in the front-rear direction, and is pivotally supported by the pump housing 212 via a bearing 240.
  • the cam chamber 122 is filled with lubricating oil.
  • Drive system components such as the cam 221 are lubricated with lubricating oil.
  • a flange 234 is formed at the front portion of the pump housing 212.
  • a gear case 223 is attached to the flange 234. From the front surface of the flange 234, the cam shaft 220 protrudes forward into the gear case 223.
  • the gear case 223 is disposed in front of the pump housing 212, is connected to the pump housing 212, and is attached to the engine body of the diesel engine.
  • the cam gear 224 is fixed to the front end portion of the cam shaft 220. The power from the crankshaft of the diesel engine can be transmitted to the power transmission means in the gear case 223 and the camshaft 220 via the cam gear 224 and the like.
  • the cam shaft 220 protrudes rearward from the rear portion of the pump housing 212.
  • the governor mechanism is housed in a governor chamber 125 formed on the rear side of the pump housing 212.
  • the governor chamber 125 and the cam chamber 122 communicate with each other through a vent hole.
  • a bevel gear 227 fixed to the cam shaft 220 is accommodated in the rear portion of the cam chamber 122.
  • the bevel gear 227 is fixed to the cam shaft 220.
  • the transmission shaft 228 protrudes downward from the upper surface of the cam chamber 122 toward the cam chamber 122.
  • a bevel gear 229 is fixed to the lower end portion of the transmission shaft 228.
  • the bevel gear 229 meshes with the bevel gear 227 on the cam shaft 220.
  • the transmission shaft 228 is installed in the vertical direction and is rotatably supported by the pump housing 212. The position of the transmission shaft 228 in the vertical direction (axial direction) is fixed by the stopper 230.
  • a rack chamber 124 is formed above the transmission shaft 228.
  • the rack chamber 124 includes a rack that is a component constituting the injection amount adjusting mechanism of the fuel injection pump 201.
  • the rack chamber 124 and the cam chamber 122 communicate with each other through a vent hole.
  • a distribution shaft 231 is fixed to the upper end portion of the transmission shaft 228 on the same axis as the transmission shaft 228 via a joint 232.
  • a delivery valve 233 is provided behind the distribution shaft 231 via a holder 331. The delivery valve 233 prevents the fuel in the injection pipe from flowing into the pressurizing chamber 214 at the end of the injection of the fuel injection pump 201.
  • the plunger 210 in the intake stroke, when the plunger 210 is pushed down and lowered by the biasing force of the spring 218, the fuel from the fuel tank is sucked into the pressurizing chamber 214, while in the discharge stroke, the plunger 210 is pressed by the biasing force of the spring 218.
  • the fuel sucked into the pressurizing chamber 214 is pressurized and fed to the distribution shaft 231 through the oil passage. Thereafter, the fuel pumped to the distribution shaft 231 is distributed to the delivery valve 233 by the distribution shaft 231 and injected from the fuel injection valve through the injection pipe.
  • the flange 234 shown in FIGS. 13 and 14 is formed in a substantially inverted triangular shape when viewed from the front.
  • a boss portion 341 that pivotally supports the cam shaft 220 is provided at the center of the flange 234.
  • a groove 342 is provided on the front surface of the boss 341.
  • the cover 251 is disposed so as to cover the opening of the groove portion 342 from the gear case 223 side, and is attached to the boss portion 341 with bolts 236 and 236.
  • three bolt holes 343, 343, and 343 into which bolts for attaching the pump housing 212 to the gear case 223 are inserted are provided on the outer peripheral portion of the flange 234. These three bolt holes 343, 343, and 343 are respectively arranged at three corners of the flange 234 formed in a substantially inverted triangular shape, and provided at substantially equal angles (approximately 120 degrees) with the boss portion 341 as the center. It is done.
  • the flange 234 is provided with two lubricating oil discharge passages 370L and 370R.
  • the lubricating oil discharge passages 370L and 370R allow the inside of the pump housing 212 and the gear case 223 to communicate with each other.
  • Lubricating oil is discharged from the cam chamber 122 in the pump housing 212 into the gear case 223 via the lubricating oil discharge passages 370L and 370R.
  • the pump housing 212 side is referred to as “upstream side” and the gear case 223 side is referred to as “downstream side” in the lubricating oil flow direction.
  • the two lubricating oil discharge passages 370L and 370R are formed so as to be bent in a substantially crank shape in a cross-sectional view.
  • the two lubricating oil discharge passages 370L and 370R are arranged on the left and right sides of the cam shaft 220, respectively, when viewed from the front (see FIG. 13). That is, a lubricating oil discharge passage 370L (hereinafter simply referred to as “left lubricating oil discharge passage 370L”) is disposed on the left side of the cam shaft 220, and a lubricating oil discharge passage 370R (hereinafter simply referred to as “ A right lubricating oil discharge passage 370R ”).
  • the left lubricating oil discharge passage 370L includes a first lubricating oil discharge passage 371L, a second lubricating oil discharge passage 372L, and a third lubricating oil discharge passage 373L.
  • the first lubricating oil discharge passage 371L substantially orthogonal to the second lubricating oil discharge passage 372L.
  • the third lubricating oil discharge passage 373L substantially perpendicular to the second lubricating oil discharge passage 372L communicates with the downstream side of the second lubricating oil discharge passage 372L.
  • the right lubricating oil discharge passage 370R includes a first lubricating oil discharge passage 371R, a second lubricating oil discharge passage 372R, and a third lubricating oil discharge passage 373R.
  • a first lubricating oil discharge passage 371R substantially orthogonal to the second lubricating oil discharge passage 372R.
  • the third lubricating oil discharge passage 373R which is substantially orthogonal to the second lubricating oil discharge passage 372R, communicates with the downstream side of the second lubricating oil discharge passage 372R.
  • the groove 342 extends along the circumferential direction of the boss 341, and is formed in a substantially C shape in front view that is opened to the left by cutting out a part of the ring in front view. .
  • the groove part 342 opens forward.
  • the inside of the groove part 342 is partitioned by a partition into a first groove part 342A, a second groove part 342B, and a third groove part 342C.
  • the positional relationship in the groove portion 342 is as follows.
  • the first groove part 342A is located at one end (upper end part) of the opening of the groove part 342.
  • the third groove 342C is located at the other open end (lower end) of the groove 342.
  • the second groove portion 342B is located between the first groove portion 342A and the second groove portion 342B.
  • the first groove portion 342A is located at the upper part of the outer periphery of the boss portion 341.
  • the second groove part 342B is located on the side part on the outer periphery of the boss part 341, in the present embodiment, on the right side part on the outer periphery of the boss part 341.
  • the third groove portion 342C is located on the lower outer periphery of the boss portion 341.
  • a pair of bolt holes 344 and 345 are provided in the groove portion 342.
  • the pair of bolt holes 344 and 345 are holes into which bolts 236 and 236 (see FIGS. 13 and 14) for attaching the cover 251 are inserted, and are provided so as to penetrate the flange 234 in the front-rear direction.
  • one bolt hole 344 is provided in the first groove portion 342A, specifically, substantially in the center of the left and right in the first groove portion 342A, and the other bolt hole 345 is provided in the third groove portion 342A.
  • the pair of bolt holes 344 and 345 are disposed substantially symmetrically (line symmetric) with respect to the center of the boss portion 341.
  • a pair of concave portions 342D and 342E are provided on the outer edge of the groove portion 342.
  • the pair of recesses 342D and 342E are formed so that the outer edge of the groove 342 is cut away.
  • the pair of recesses 342D and 342E can be easily processed by, for example, cutting the outer edge of the groove 342.
  • one recess 342D is provided on the outer edge of the first groove 342A
  • the other recess 342E is provided on the outer edge of the third groove 342C.
  • a pair of recessed part 342D * 342E is arrange
  • the pair of recesses 342D and 342E and the pair of bolt holes 344 and 345 are arranged on one line (diameter) passing through the center of the boss portion 341.
  • a first lubricating oil discharge passage 371L constituting an upstream side passage of the left lubricating oil discharge passage 370L is provided in the first groove 342A. Further, in the second groove portion 342B, a first lubricating oil discharge passage 371R constituting an upstream side passage of the right lubricating oil discharge passage 370R is provided at an end portion on the first groove portion 342A side.
  • the first lubricating oil discharge passage 371L is a communication hole that penetrates the flange 234 in the front-rear direction.
  • the upstream end portion of the first lubricant discharge passage 371L communicates with the cam chamber 122 (see FIGS. 11 and 12) of the pump housing 212.
  • the downstream end portion of the first lubricating oil discharge passage 371L communicates with the inside of the first groove portion 342A.
  • the first lubricating oil discharge passage 371L has a lower end portion above the horizontal line passing through the axis of the cam shaft 220 in the front view of the fuel injection pump 1 or a lower end portion of the horizontal line.
  • the hole shape of the first lubricating oil discharge passage 371L is substantially elliptical when viewed from the front.
  • the hole width (length in the elliptical short side direction) of the first lubricating oil discharge passage 371L substantially matches the groove width of the first groove 342A.
  • the passage area of the first lubricating oil discharge passage 371L (the cross-sectional area in the direction orthogonal to the flow direction of the lubricating oil. The same applies hereinafter) is denoted by AL1.
  • the first lubricating oil discharge passage 371R is constituted by a communication hole that penetrates the flange 234 in the front-rear direction.
  • the upstream end portion of the first lubricating oil discharge passage 371R communicates with the cam chamber 122 (see FIGS. 11 and 12) of the pump housing 212.
  • the downstream end portion of the first lubricant discharge passage 371R communicates with the second groove portion 342B.
  • the first lubricating oil discharge passage 371R has a lower end portion above the horizontal line passing through the axis of the cam shaft 220 in the front view of the fuel injection pump 1 or a lower end portion of the horizontal line.
  • the hole shape of the first lubricating oil discharge passage 371R is substantially elliptical when viewed from the front.
  • the hole width (length in the elliptical short side direction) of the first lubricating oil discharge passage 371R substantially matches the groove width of the first groove 342A.
  • the passage area of the first lubricating oil discharge passage 371R is represented by AR1.
  • the cover 251 is a substantially C-shaped plate-like member, and is disposed on the groove portion 342 of the flange 234 in a state opened to the left.
  • the cover 251 has a plate-like structure including a plurality of concave portions having the first mounting plate 351 or the second mounting plate 352 and a plurality of flat portions having the left passage plate 353 or the right passage plate 354.
  • the cover 251 is provided with a pair of bolt holes 351A and 352A and a pair of convex portions 351B and 352B.
  • one end (upper end) of the opening of the cover 251 is a left passage plate 353.
  • a first mounting plate 351 is connected to the left passage plate 353.
  • the other open end (lower end) of the cover 251 is a second mounting plate 352.
  • a right passage plate 354 is connected to the second mounting plate 352.
  • the first mounting plate 351 and the second mounting plate 352 are arranged on the same plane (Z1 shown in FIG. 18), and the left passage plate 353 and the right passage plate 354 are arranged on the plane Z1. They are arranged on the same plane (Z2 shown in FIG. 18) that is substantially parallel and different in height from the plane Z1.
  • variety of the 1st attachment plate 351 is comprised a little narrower than the groove width in the 1st groove part 342A. That is, the first mounting plate 351 is configured to fit in the first groove 342A.
  • the rear surface of the first mounting plate 351 (the surface on the flange 234 side) is configured to be along the bottom surface of the first groove portion 342A (the front surface of the flange 234).
  • the first mounting plate 351 is provided with one bolt hole 351A of the pair of bolt holes 351A and 352A.
  • the bolt hole 351A is a hole penetrating the first mounting plate 351, and the bolt 236 is inserted together with the bolt hole 344 in the first groove portion 342A.
  • one convex part 351B is provided in the outer edge end of the 1st attachment board 351 among a pair of convex parts 351B and 352B.
  • the convex portion 351B is a portion that protrudes outward from the outer edge of the first mounting plate 351, and is configured to fit into the concave portion 342D of the first groove portion 342A.
  • the width of the second mounting plate 352 is configured to be slightly narrower than the groove width inside the third groove portion 342C. That is, the second mounting plate 352 is configured to fit in the third groove portion 342C.
  • the rear surface of the second mounting plate 352 (the surface on the flange 234 side) is configured to be along the bottom surface of the second groove portion 342B (the front surface of the flange 234).
  • the second mounting plate 352 is provided with the other bolt hole 352A of the pair of bolt holes 351A and 352A.
  • the bolt hole 352A is a hole penetrating the second mounting plate 352, and the bolt 236 is inserted together with the bolt hole 345 in the third groove portion 342C.
  • the other convex part 352B is provided in the outer edge end of the 2nd attachment board 352 among a pair of convex parts 351B and 352B.
  • the convex portion 352B is a portion that protrudes outward from the outer edge of the second mounting plate 352, and is configured to fit into the concave portion 342E of the third groove portion 342C.
  • the left passage plate 353 is formed to be bent so that one end (upper end) of the opening of the cover 251 is substantially parallel to the first mounting plate 351 (see FIG. 18).
  • the width of the left passage plate 353 is set slightly wider than the groove width inside the first groove portion 342A. That is, the left passage plate 353 is configured to cover the first groove 342A from the gear case 223 side. Accordingly, as shown in FIGS. 19A and 20, the first groove 342A and the left passage plate 353 form a passage having a predetermined cross-sectional area, that is, the left second lubricating oil discharge passage 372L. Composed.
  • the passage area of the second lubricating oil discharge passage 372L is represented by AL2.
  • the passage area AL2 of the second lubricating oil discharge passage 372L is smaller than the passage area AL1 of the first lubricating oil discharge passage 371L (AL2 ⁇ AL1).
  • the upstream end of the second lubricating oil discharge passage 372L communicates with the first lubricating oil discharge passage 371L.
  • the downstream end of the second lubricating oil discharge passage 372L communicates with the third lubricating oil discharge passage 373L.
  • the passage width of the second lubricating oil discharge passage 372L substantially coincides with the opening width (elliptical short side) of the first lubricating oil discharge passage 371L at the upstream end portion in the radial direction of the boss portion 341.
  • a narrow portion 372La is formed at the downstream end of the second lubricating oil discharge passage 372L.
  • the passage width of the narrow portion 372La (the groove width inside the first groove portion 342A) is narrower than the passage width of the upstream end portion in the radial direction of the boss portion 341.
  • the third lubricating oil discharge passage 373L is constituted by a through hole that penetrates the left passage plate 353 of the cover 251.
  • the third lubricating oil discharge passage 373L is a notch hole and is configured along the outer edge end surface 353A of the left passage plate 353 of the cover 251.
  • the third lubricating oil discharge passage 373L is constituted by a gap generated between the outer edge end surface 353A of the left passage plate 353 and the inner peripheral surface of the first groove portion 342A (narrow portion 372La).
  • the outer edge end surface 353A is an end surface of the opening front end portion of the cover 251 and is configured to cross the first groove portion 342A (a direction intersecting the flow direction of the lubricating oil).
  • the upstream end portion of the third lubricating oil discharge passage 373L communicates with the second lubricating oil discharge passage 372L.
  • the downstream end of the third lubricating oil discharge passage 373L opens to the front side of the flange 234 and communicates with the inside of the gear case 223. That is, the third lubricating oil discharge passage 373L forms a communication passage together with the second lubricating oil discharge passage 372L, and connects the inside of the gear case 223 and the first lubricating oil discharge passage 371L outside the flange 234.
  • the third lubricating oil discharge passage 373L is provided below the first lubricating oil discharge passage 371L.
  • the passage area of the third lubricating oil discharge passage 373L is represented by AL3.
  • the passage area AL3 of the third lubricating oil discharge passage 373L is smaller than the passage area AL1 of the first lubricating oil discharge passage 371L (AL3 ⁇ AL1). Further, the passage area AL3 of the third lubricating oil discharge passage 373L is smaller than the passage area AL2 of the second lubricating oil discharge passage 372L (AL3 ⁇ AL2). That is, in the left lubricating oil discharge passage 370L, the passage area AL3 of the third lubricating oil discharge passage 373L is the smallest, and the passage area AL1 of the first lubricating oil discharge passage 371L is the largest (AL3 ⁇ AL2 ⁇ AL1).
  • the left lubricating oil discharge passage 370L is stepwise as the passage areas of the three lubricating oil discharge passages 371L, 372L, and 373L move from the upstream side to the downstream side, that is, from the pump housing 212 side to the gear case 223 side. Configured to be smaller.
  • the right passage plate 354 is such that a portion of the cover 251 between the first mounting plate 351 and the second mounting plate 352 is bent substantially parallel to the first mounting plate 351 and the second mounting plate 352. Formed (see FIG. 18).
  • the width of the right passage plate 354 is set slightly wider than the groove width of the second groove portion 342B. That is, the right passage plate 354 is configured to cover the second groove 342B from the gear case 223 side. Accordingly, as shown in FIGS. 19B and 20, the second groove 342B and the right passage plate 354 form a passage having a predetermined cross-sectional area, that is, the right second lubricating oil discharge passage 372R. Composed.
  • the passage area of the second lubricating oil discharge passage 372R is represented by AR2.
  • the passage area AR2 of the second lubricating oil discharge passage 372R is smaller than the passage area AR1 of the first lubricating oil discharge passage 371R (AR2 ⁇ AR1).
  • the upstream end of the second lubricant discharge passage 372R communicates with the first lubricant discharge passage 371, and the downstream end of the second lubricant discharge passage 372R communicates with the third lubricant discharge passage 373R.
  • the passage width of the second lubricating oil discharge passage 372R substantially matches the opening width (elliptical short side) of the first lubricating oil discharge passage 371R at the upstream end in the radial direction of the boss portion 341.
  • a narrow portion 372Ra is formed in the midstream portion of the second lubricating oil discharge passage 372R.
  • the passage width of the narrow portion 372Ra (the groove width inside the second groove portion 342B) is narrower than the passage width of the upstream end portion in the radial direction of the boss portion 341.
  • the third lubricating oil discharge passage 373 ⁇ / b> R is configured by a through hole that penetrates the right passage plate 354 of the cover 251.
  • the hole shape of the third lubricating oil discharge passage 373R is substantially circular.
  • the upstream end portion of the third lubricating oil discharge passage 373R communicates with the second lubricating oil discharge passage 372R.
  • the downstream end of the third lubricating oil discharge passage 373R opens to the front side of the flange 234 and communicates with the inside of the gear case 223.
  • the third lubricating oil discharge passage 373R forms a communication passage with the second lubricating oil discharge passage 372R, and communicates the inside of the gear case 223 and the first lubricating oil discharge passage 371R outside the flange 234.
  • the third lubricating oil discharge passage 373R is provided below the first lubricating oil discharge passage 371R.
  • the third lubricating oil discharge passage 373R is provided at the end of the right passage plate 354 opposite to the side covering the first lubricating oil discharge passage 371R.
  • the passage area of the third lubricating oil discharge passage 373R is represented by AR3.
  • the passage area AR3 of the third lubricating oil discharge passage 373R is smaller than the passage area AR1 of the first lubricating oil discharge passage 371R (AR3 ⁇ AR1).
  • the passage area AR3 of the third lubricating oil discharge passage 373R is smaller than the passage area AR2 of the second lubricating oil discharge passage 372R (AR3 ⁇ AR2). That is, in the right lubricating oil discharge passage 370R, the passage area AR3 of the third lubricating oil discharge passage 373R is the smallest, and the passage area AR1 of the first lubricating oil discharge passage 371R is the largest (AR3 ⁇ AR2 ⁇ AR1).
  • the lubricating oil discharge passage 370R on the right side is stepwise as the passage area of the three lubricating oil discharge passages 371R, 372R, 373R moves from the upstream side to the downstream side, that is, from the pump housing 212 side to the gear case 223 side. Configured to be smaller.
  • the fuel injection pump 201 attaches the gear case 223 to the flange 234 of the pump housing 212 and inserts the cam shaft 220 protruding from the flange 234 into the gear case 223.
  • the cam gear 224 is provided on the cam shaft 220 in the gear case 223, and the lubricating oil discharge passages 370L and 370R for discharging the lubricating oil in the pump housing 212 into the gear case 223 are provided in the flange 234.
  • the lubricating oil discharge passages 370L and 370R are formed to be bent in a substantially crank shape, and the first lubricating oil discharge passages 371L and 371R and the second lubricating oil discharge passage 372L (372R)
  • the third lubricating oil discharge passages 373L and 373R are configured.
  • the second lubricating oil discharge passages 372L and 372R are provided on one side surface of the flange 234 of the pump housing 212.
  • the first lubricating oil discharge passages 371L and 371R are substantially orthogonal to the second lubricating oil discharge passages 372L and 372R, and communicate with the upstream side of the second lubricating oil discharge passages 372L and 372R.
  • the third lubricating oil discharge passages 373L and 373R are substantially orthogonal to the second lubricating oil discharge passages 372L and 372R and communicate with the downstream side of the second lubricating oil discharge passages 372L and 372R.
  • a groove portion 342 constituting a part of the lubricating oil discharge passages 370L and 370R is provided on one side surface of the flange 234 of the pump housing 212.
  • the first lubricating oil discharge passages 371L and 371R are holes that penetrate the flange 234 of the pump housing 212 in the groove 342. An upstream end portion of the first lubricating oil discharge passage communicates with the inside of the pump housing 212. The downstream end portions of the first lubricating oil discharge passages 371L and 371R communicate with the inside of the groove portion 342 and are covered with the cover 251.
  • the second lubricating oil discharge passages 372L and 372R are configured by the groove portion 342 and the cover 251.
  • the third lubricating oil discharge passages 373L and 373R are configured along the end surface of the cover 251.
  • passage areas AL2 and AR2 of the second lubricating oil discharge passages 372L and 372R and the passage areas AL3 and AR3 of the third lubricating oil discharge passages 373L and 373R respectively correspond to the first lubricating oil discharge passages 371L and 371R.
  • the passage area is smaller than AL1 and AR1.
  • the lubricating oil sequentially passes from the cam chamber 122 in the pump housing 212 through the first lubricating oil discharge passages 371L and 371R, the second lubricating oil discharge passages 372L and 372R, and the third lubricating oil discharge passages 373L and 373R. It is discharged into 223. Then, the passage area on the gear case 223 side of the lubricating oil discharge passages 370L and 370R becomes smaller than the passage area on the pump housing 212 side, and the lubricating oil is likely to accumulate in the third lubricating oil discharge passages 373L and 373R.
  • the fuel injection pump 201 can reduce the amount of splashing of the lubricating oil in the pump housing 3 and suppress the mixing of the lubricating oil generated due to the splashing of the lubricating oil into the fuel.
  • the fuel injection pump 201 makes the passage areas AL3 and AR3 of the third lubricating oil discharge passages 373L and 373R smaller than the passage areas AL2 and AR2 of the second lubricating oil discharge passages 372L and 372R.
  • the passage area of the lubricating oil discharge passages 370L and 370R on the gear case 223 side gradually decreases toward the gear case 223 side, so that the lubricating oil is easily collected by the third lubricating oil discharge passages 373L and 373R. Therefore, the pulsation pressure accompanying the vertical movement of the piston of the diesel engine is attenuated by the lubricating oil accumulated in the third lubricating oil discharge passages 373L and 373R, and is difficult to propagate from the gear case 223 side to the pump housing 3. Therefore, the fuel injection pump 201 can reduce the amount of splashing of the lubricating oil in the pump housing 3 and suppress the mixing of the lubricating oil generated due to the splashing of the lubricating oil into the fuel.
  • the passage area of the lubricating oil discharge passage 370L (370R) can be easily adjusted simply by processing the end face of the cover 251. Therefore, the processing cost of the lubricating oil discharge passage 370L (370R) can be reduced, and the manufacturing cost of the fuel injection pump 201 can be reduced.
  • Third lubricating oil discharge passages 373L and 373R are provided below the first lubricating oil discharge passages 371L and 371R.
  • the lubricating oil when the lubricating oil is discharged from the pump housing 212 into the gear case 223, the lubricating oil flows down from the upper side to the lower side of the lubricating oil discharge passages 370L and 370R. Therefore, the lubricating oil can be smoothly discharged and the lubricating performance can be improved.
  • the fuel injection pump 201 is provided with convex portions 351B and 352B that can be fitted into the concave portions 342D and 342E formed on the flange 234 of the pump housing 212 on the cover 251, and the cover 251 is attached to the pump housing 3 so as to be positioned.
  • the fuel injection pump 201 can efficiently perform the assembly operation of the fuel injection pump.
  • the fuel injection pump 201 attaches the cover 251 to the flange 234 of the pump housing 212, the pair of convex portions 351B and 352B of the cover 251 are fitted into the pair of concave portions 342D and 342E of the flange 234, respectively.
  • the cover 251 can be easily positioned on the flange 234 (groove 342).
  • convex part 351B is provided in the middle part outer edge of the first attachment plate 351
  • convex part 352B is provided in the tip part outer edge of the second attachment board 352 (in other words, convex part 351B and convex part 352B are Therefore, the mounting position of the cover 251 can be easily recognized at the time of assembly. Accordingly, the pair of convex portions 351B and 352B can be easily fitted to the pair of concave portions 342D and 342E without making any mistakes, and the attaching operation of the cover 251 is further facilitated.
  • the present invention can be used for a fuel injection pump of a fuel injection device mounted on a diesel engine.

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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 l'invention, des gouttelettes d'une huile lubrifiante sortant du côté du carter d'engrenage qui est relié à un boîtier de pompe sont rendues moins sujettes à entrer dans le boîtier de la pompe, de manière à empêcher ainsi l'huile lubrifiante de se mélanger au carburant par suite de la présence des gouttelettes de l'huile lubrifiante. Une pompe d'injection de carburant (1) est pourvue d'un boîtier de pompe (3) relié à un carter d'engrenage (50). Le boîtier de pompe (3) est pourvu d'un trou d'évacuation d'huile lubrifiante (3j) destiné à relier l'intérieur du boîtier de pompe (3) à l'intérieur du carter d'engrenage (50), d'une gorge qui relie le trou d'évacuation d'huile lubrifiante (3j) et d'un couvercle (60) monté sur le boîtier de pompe (3) et qui recouvre le trou d'évacuation d'huile lubrifiante (3j) et une partie de la gorge partant du côté du carter d'engrenage (50). Le trou d'évacuation d'huile lubrifiante (3j), la gorge et le couvercle (60) forment un trajet de communication de forme coudée pour relier l'intérieur du boîtier de pompe (3) à l'intérieur du carter d'engrenage (50).
PCT/JP2010/056868 2009-04-20 2010-04-16 Pompe d'injection de carburant WO2010122963A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201080017364.0A CN102405345B (zh) 2009-04-20 2010-04-16 燃料喷射泵

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2009102513A JP5255506B2 (ja) 2009-04-20 2009-04-20 燃料噴射ポンプ
JP2009-102513 2009-04-20
JP2009-217565 2009-09-18
JP2009217565A JP5350155B2 (ja) 2009-09-18 2009-09-18 燃料噴射ポンプ

Publications (1)

Publication Number Publication Date
WO2010122963A1 true WO2010122963A1 (fr) 2010-10-28

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CN (1) CN102405345B (fr)
WO (1) WO2010122963A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013204500A (ja) * 2012-03-28 2013-10-07 Yanmar Co Ltd 燃料噴射ポンプ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6180364U (fr) * 1984-10-31 1986-05-28
JPS63201308A (ja) * 1987-02-17 1988-08-19 Honda Motor Co Ltd デイ−ゼルエンジン
JP2005146984A (ja) * 2003-11-14 2005-06-09 Yanmar Co Ltd 燃料噴射ポンプ
JP2008106780A (ja) * 2007-12-04 2008-05-08 Yanmar Co Ltd 燃料噴射ポンプ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004150290A (ja) * 2002-10-29 2004-05-27 Bosch Automotive Systems Corp 燃料供給用ポンプおよびタペット構造体
US8061328B2 (en) * 2005-03-09 2011-11-22 Caterpillar Inc. High pressure pump and method of reducing fluid mixing within same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6180364U (fr) * 1984-10-31 1986-05-28
JPS63201308A (ja) * 1987-02-17 1988-08-19 Honda Motor Co Ltd デイ−ゼルエンジン
JP2005146984A (ja) * 2003-11-14 2005-06-09 Yanmar Co Ltd 燃料噴射ポンプ
JP2008106780A (ja) * 2007-12-04 2008-05-08 Yanmar Co Ltd 燃料噴射ポンプ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013204500A (ja) * 2012-03-28 2013-10-07 Yanmar Co Ltd 燃料噴射ポンプ

Also Published As

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CN102405345B (zh) 2013-10-02
KR101639674B1 (ko) 2016-07-14
KR20120004522A (ko) 2012-01-12
CN102405345A (zh) 2012-04-04

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