WO2016163086A1 - Dispositif d'injection de carburant - Google Patents

Dispositif d'injection de carburant Download PDF

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Publication number
WO2016163086A1
WO2016163086A1 PCT/JP2016/001665 JP2016001665W WO2016163086A1 WO 2016163086 A1 WO2016163086 A1 WO 2016163086A1 JP 2016001665 W JP2016001665 W JP 2016001665W WO 2016163086 A1 WO2016163086 A1 WO 2016163086A1
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WO
WIPO (PCT)
Prior art keywords
outlet
inlet
fuel
injection device
fuel injection
Prior art date
Application number
PCT/JP2016/001665
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English (en)
Japanese (ja)
Inventor
典嗣 加藤
啓太 今井
Original Assignee
株式会社デンソー
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 JP2015147790A external-priority patent/JP6292188B2/ja
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to CN201680019284.6A priority Critical patent/CN107407245B/zh
Priority to DE112016001634.4T priority patent/DE112016001634T5/de
Priority to US15/554,095 priority patent/US10280887B2/en
Publication of WO2016163086A1 publication Critical patent/WO2016163086A1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for

Definitions

  • This disclosure relates to a fuel injection device.
  • a fuel injection device that injects fuel into a cylinder of an internal combustion engine is known.
  • the fuel injection device is provided with an injection hole, and fuel is injected from the outlet of the injection hole.
  • Patent Document 1 describes a fuel injection device having an injection hole whose diameter increases from the inlet side toward the outlet side.
  • the degree to which the fuel is atomized is insufficient, and a configuration capable of atomizing the fuel is desired.
  • the present disclosure aims to provide a fuel injection device capable of atomizing the fuel injected from the outlet of the nozzle hole.
  • a fuel injection device including a body portion that forms an injection hole through which fuel is injected, the body portion being a fuel flow path that is connected to a fuel inlet of the injection hole.
  • An inlet-side channel forming portion that forms an inlet-side channel, and an outlet-side channel formation that forms an outlet-side channel that is a fuel channel by connecting to the inlet-side channel and the fuel outlet of the nozzle hole.
  • the surface roughness of the outlet side flow path forming portion is larger than the surface roughness of the inlet side flow path forming portion.
  • the surface roughness of the outlet side flow path forming portion is larger than the surface roughness of the inlet side flow path forming portion
  • a plurality of convex portions or concave portions are provided in the outlet side flow path forming portion.
  • the flow rate of the fuel is easily maintained when passing through the inlet-side flow path forming portion having a relatively small surface roughness.
  • a fuel passes the exit side flow path formation part with comparatively large surface roughness, it becomes easy to disturb a flow.
  • the fuel whose flow is disturbed is atomized by being diffused in various directions when injected from the outlet.
  • a plurality of grooves extending from the inlet side to the outlet side are provided in the outlet-side channel forming portion.
  • the fuel tends to be along the groove when passing through the outlet side flow path.
  • the fuel spreads in the radial direction of the nozzle hole along the groove, so that the liquid film tends to become thin. Therefore, the fuel injected from the outlet is atomized.
  • a fuel injection device including a body portion that forms an injection hole through which fuel is injected, the body portion being connected to a fuel inflow port of the injection hole and being a fuel flow path.
  • An inlet-side channel forming part that forms a certain inlet-side channel, and an outlet-side channel that is connected to the inlet-side channel and the fuel outlet of the nozzle hole to form an outlet-side channel that is a fuel channel.
  • the inlet-side channel and the outlet-side channel are formed so as to increase in diameter from the inlet side toward the outlet side, and the diameter expansion rate, which is the degree to which the outlet-side channel expands, Larger than the diameter expansion rate, which is the degree of diameter expansion of the inlet-side flow path.
  • the fuel flowing into the nozzle hole from the inlet spreads in the radial direction of the nozzle hole when colliding with the inner wall of the nozzle hole, so that the liquid film becomes thin.
  • the fuel whose liquid film has been thinned in advance in the inlet-side flow path becomes thinner in the outlet-side flow path having a larger diameter expansion ratio than the inlet-side flow path. Therefore, the fuel injected from the outlet is atomized.
  • FIG. 1 is a cross-sectional view of a fuel injection device according to a first embodiment of the present disclosure. It is sectional drawing to which the front end vicinity containing the nozzle hole of the fuel injection apparatus by 1st Embodiment of this indication was expanded. It is the figure which looked at the front-end
  • FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. It is sectional drawing to which the nozzle hole vicinity in the fuel injection device by a 2nd embodiment of this indication was expanded. It is sectional drawing to which the nozzle hole vicinity in the fuel injection device by a 3rd embodiment of this indication was expanded. It is sectional drawing to which the nozzle hole vicinity of the fuel injection device by a 4th embodiment of this indication was expanded. It is sectional drawing to which the nozzle hole vicinity of the fuel-injection apparatus by 5th Embodiment of this indication was expanded.
  • FIGS. 1 illustrates a valve opening direction in which the needle 40 is separated from the valve seat 34 and a valve closing direction in which the needle 40 is in contact with the valve seat 34.
  • the fuel injection valve 1 is used, for example, in a fuel injection device of a direct injection type gasoline engine (not shown), and injects and supplies gasoline as fuel to the engine.
  • the fuel injection valve 1 includes a housing 20, a needle 40, a movable core 47, a fixed core 35, a coil 38, springs 24 and 26, and the like.
  • the housing 20 includes a first cylinder member 21, a second cylinder member 22, a third cylinder member 23, and a body portion 30.
  • the first cylinder member 21, the second cylinder member 22, and the third cylinder member 23 are all formed in a substantially cylindrical shape, and are coaxial in the order of the first cylinder member 21, the second cylinder member 22, and the third cylinder member 23. Arranged and connected to each other.
  • the first cylinder member 21 and the third cylinder member 23 are made of a magnetic material such as ferritic stainless steel and subjected to a magnetic stabilization process.
  • the first cylinder member 21 and the third cylinder member 23 have a relatively low hardness.
  • the second cylindrical member 22 is formed of a nonmagnetic material such as austenitic stainless steel, for example.
  • the hardness of the second cylinder member 22 is higher than the hardness of the first cylinder member 21 and the third cylinder member 23.
  • the body part 30 is provided at the end of the first cylinder member 21 opposite to the second cylinder member 22.
  • the body portion 30 is formed in a bottomed cylindrical shape from a metal such as martensitic stainless steel, and is welded to the first cylindrical member 21.
  • the body part 30 is subjected to a quenching process so as to have a predetermined hardness.
  • the body part 30 is provided with an injection part 301 and a cylinder part 302.
  • the injection unit 301 is formed line-symmetrically with the central axis C1 of the housing 20 as the axis of symmetry.
  • the outer wall 303 of the injection part 301 has a spherical shape centered on a point on the central axis C1, and is formed so as to protrude in the direction of the central axis C1.
  • a plurality of injection holes 31 for communicating the inside and the outside of the housing 20 are formed in the injection unit 301.
  • the nozzle hole 31 is formed by performing laser irradiation from the outside of the body portion 30.
  • Six injection holes 31 are formed in the body portion 30 according to the first embodiment.
  • An annular valve seat 34 is formed on the outer periphery of the inlet 32 which is the opening of the injection hole 31 on the side where the fuel flows into the housing 20.
  • An outflow port 33 that is an opening of the injection hole 31 on the side from which the fuel flows out of the housing 20 is formed in the outer wall 303 of the injection unit 301. The detailed structure of the body part 30 will be described later.
  • the cylindrical portion 302 is provided so as to surround the radially outer side of the injection portion 301 and extend to the opposite side to the direction in which the outer wall 303 of the injection portion 301 protrudes.
  • the cylindrical portion 302 has one end connected to the injection portion 301 and the other end connected to the first cylindrical member 21.
  • the needle 40 is made of a metal such as martensitic stainless steel, for example.
  • the needle 40 is subjected to a quenching process so as to have a predetermined hardness.
  • the hardness of the needle 40 is set substantially equal to the hardness of the body portion 30.
  • the needle 40 is accommodated in the housing 20.
  • the needle 40 includes a shaft portion 41, a seal portion 42, a large diameter portion 43, and the like.
  • the shaft portion 41, the seal portion 42, and the large diameter portion 43 are integrally formed.
  • the shaft portion 41 is formed in a cylindrical rod shape.
  • a sliding contact portion 45 is formed in the vicinity of the seal portion 42 of the shaft portion 41.
  • the sliding contact portion 45 is formed in a substantially cylindrical shape, and a part of the outer wall 451 is chamfered.
  • the slidable contact portion 45 can be slidably contacted with the inner wall of the body portion 30 (cylindrical portion 302) at a portion where the outer wall 451 is not chamfered. As a result, the needle 40 is guided to reciprocate at the tip of the valve seat 34 side.
  • the shaft portion 41 is formed with a hole 46 that connects the inner wall and the outer wall of the shaft portion 41.
  • the seal portion 42 is provided at an end portion of the shaft portion 41 on the valve seat 34 side, and can contact the valve seat 34.
  • the needle 40 opens or closes the nozzle hole 31 when the seal portion 42 is separated from the valve seat 34 or abuts against the valve seat 34, and communicates or blocks the inside and outside of the housing 20.
  • the large diameter portion 43 is provided on the opposite side of the shaft portion 41 from the seal portion 42.
  • the large diameter portion 43 is formed so that the outer diameter thereof is larger than the outer diameter of the shaft portion 41.
  • the end face of the large diameter portion 43 on the valve seat 34 side is in contact with the movable core 47.
  • the needle 40 reciprocates within the housing 20 while the sliding contact portion 45 is supported by the inner wall of the body portion 30 and the shaft portion 41 is supported by the inner wall of the second cylindrical member 22 via the movable core 47.
  • the movable core 47 is formed in a substantially cylindrical shape with a magnetic material such as ferritic stainless steel, for example, and the surface is plated with chromium, for example.
  • the movable core 47 is subjected to a magnetic stabilization process.
  • the hardness of the movable core 47 is relatively low and is substantially equal to the hardness of the first cylinder member 21 and the third cylinder member 23 of the housing 20.
  • a through hole 49 is formed in the approximate center of the movable core 47. The shaft portion 41 of the needle 40 is inserted into the through hole 49.
  • the fixed core 35 is formed in a substantially cylindrical shape by a magnetic material such as ferritic stainless steel.
  • the fixed core 35 is subjected to a magnetic stabilization process.
  • the hardness of the fixed core 35 is relatively low and is almost equal to the hardness of the movable core 47, but in order to ensure the function as a stopper of the movable core 47, for example, chrome plating is applied to the surface to ensure the necessary hardness. Yes.
  • the fixed core 35 is welded to the third cylindrical member 23 of the housing 20 so as to be fixed to the inside of the housing 20.
  • the coil 38 is formed in a substantially cylindrical shape, and is provided so as to surround the outer side in the radial direction of the second cylindrical member 22 and the third cylindrical member 23 of the housing 20.
  • the coil 38 generates a magnetic force when electric power is supplied.
  • a magnetic force is generated in the coil 38, a magnetic circuit is formed in the fixed core 35, the movable core 47, the first cylindrical member 21, and the third cylindrical member 23.
  • a magnetic attractive force is generated between the fixed core 35 and the movable core 47, and the movable core 47 is attracted to the fixed core 35.
  • the needle 40 that is in contact with the surface of the movable core 47 opposite to the valve seat 34 side moves together with the movable core 47 in the stationary core 35 side, that is, in the valve opening direction.
  • the spring 24 is provided so that one end is in contact with the spring contact surface 431 of the large diameter portion 43. The other end of the spring 24 is in contact with one end of the adjusting pipe 11 that is press-fitted and fixed inside the fixed core 35.
  • the spring 24 has a force extending in the axial direction. Thereby, the spring 24 urges the needle 40 together with the movable core 47 in the direction of the valve seat 34, that is, in the valve closing direction.
  • the spring 26 is provided so that one end is in contact with the stepped surface 48 of the movable core 47. The other end of the spring 26 is in contact with an annular step surface 211 formed inside the first cylindrical member 21 of the housing 20.
  • the spring 26 has a force extending in the axial direction. Thus, the spring 26 urges the movable core 47 together with the needle 40 in the direction opposite to the valve seat 34, that is, in the valve opening direction.
  • the urging force of the spring 24 is set larger than the urging force of the spring 26.
  • the substantially cylindrical fuel introduction pipe 12 is press-fitted and welded to the end of the third cylinder member 23 opposite to the second cylinder member 22.
  • a filter 13 is provided inside the fuel introduction pipe 12. The filter 13 collects foreign matters in the fuel that has flowed from the introduction port 14 of the fuel introduction pipe 12.
  • the radially outer sides of the fuel introduction pipe 12 and the third cylinder member 23 are molded with resin.
  • a connector 15 is formed in the mold part.
  • a terminal 16 for supplying power to the coil 38 is insert-molded in the connector 15.
  • a cylindrical holder 17 is provided outside the coil 38 in the radial direction so as to cover the coil 38.
  • the fuel flowing in from the introduction port 14 of the fuel introduction pipe 12 flows in the radial direction of the fixed core 35, inside the adjusting pipe 11, inside the large diameter portion 43 and shaft portion 41 of the needle 40, the hole 46, the first cylindrical member. 21 and the shaft portion 41 of the needle 40 circulate through the gap 41 and guided into the body portion 30. That is, from the inlet 14 of the fuel introduction pipe 12 to the gap between the first cylindrical member 21 and the shaft portion 41 of the needle 40 becomes the fuel passage 18 for introducing fuel into the body portion 30.
  • the periphery of the movable core 47 is filled with fuel.
  • the state of the injection hole 31 will be described based on an enlarged view of the tip portion of the fuel injection valve 1 in the valve closing direction shown in FIG.
  • the outlet 33 of the nozzle hole 31 is formed outside the inlet 32 with respect to the central axis C1. Therefore, the fuel flowing from the fuel passage 18 to the inflow port 32 is injected outward from the outflow port 33. That is, the central axis C ⁇ b> 2 of the nozzle hole 31 is further away from the central axis C ⁇ b> 1 as it goes from the inlet 32 to the outlet 33.
  • the fuel injection valve 1 has six injection holes 31 formed in the body portion 30. Specifically, as shown in FIG. 3, nozzle holes 311, 312, 313, 314, 315, and 316 are respectively formed. Further, the respective outlets 331 to 336 of the respective nozzle holes 311 to 316 are provided on the outer side as compared with the respective inlets 321 to 326.
  • nozzle holes 312 to 316 are not described, but are the same as the nozzle holes 311, that is, the same shape.
  • the nozzle hole 311 is formed by the body portion 30. Specifically, the body portion 30 forms an inlet 321, an outlet 331, an inlet-side channel 341, and an outlet-side channel 351.
  • the edge which forms the inflow port 321 among the body parts 30 is called the inflow port formation part 321a.
  • An edge forming the outflow port 331 is referred to as an outflow port forming portion 331a.
  • a wall surface that forms the inlet-side channel 341 is referred to as an inlet-side channel forming part 341a.
  • the wall surface which forms the exit side flow path 351 among the body parts 30 is called the exit side flow path formation part 351a.
  • the inlet 321 is formed in a circular shape by the inlet forming part 321a.
  • the outflow port 331 is formed in a circular shape by the outflow port forming portion 331a on the valve closing direction side of the inflow port 321.
  • a flow path that connects the inflow port 321 and the outflow port 331 is formed by the body portion 30.
  • the inlet side flow path forming part 341a extends from the inlet 321 side toward the outlet 331 and has a cylindrical shape.
  • one end of the inlet-side channel forming part 341a on the inlet 321 side is connected to the inlet-forming part 321a.
  • the outlet side flow path forming part 351a connects the inlet side flow path forming part 341a and the outlet forming part 331a, and has a cylindrical shape. Specifically, one end on the outlet 331 side of the inlet-side flow path forming portion 341a and one end on the inlet 321 side of the outlet-side flow passage forming portion 351a are connected. And the other end on the opposite side to the said one end of the exit side flow-path formation part 351a and the outflow port formation part 331a are connected.
  • the surface roughness of the outlet-side channel forming part 351a is larger than the surface roughness of the inlet-side channel forming part 341a.
  • the surface roughness can be expressed by arithmetic average roughness, maximum height, ten-point average roughness, or the like. In the present embodiment, the surface roughness is a ten-point average roughness.
  • the surface roughness of the inlet-side channel forming portion 341a is 0.4 ⁇ m
  • the surface roughness of the outlet-side channel forming portion 351a is 0.5 ⁇ m. Note that the surface roughness of the inlet-side channel forming portion 341a and the surface roughness of the outlet-side channel forming portion 351a are not limited to the above values, and can be changed as appropriate.
  • the fuel that flows in from the inlet 321 passes through the inlet-side channel 341 and the outlet-side channel 351, and is injected from the outlet 331.
  • the boundary between the inlet-side channel 341 and the outlet-side channel 351 is indicated by a virtual line K1.
  • the diameter D1 increases, that is, the diameter increases, from the inlet 321 side toward the outlet 331 side.
  • the diameter expansion rate which is the degree to which the diameter D1 of the inlet-side channel 341 increases, is constant.
  • the outlet-side flow path 351 has a diameter D2 that increases, that is, expands from the inlet 321 side toward the outlet 331 side. And the diameter expansion rate which is a degree which the diameter D2 of the exit side flow path 351 expands becomes so large that it goes to the outflow port 331 side from the inflow port 321 side.
  • the diameter D2 of the outlet side channel 351 is larger than the diameter D1 of the inlet side channel 341. Specifically, the size when the diameter D2 of the outlet-side channel 341 is minimum is larger than the length when the diameter D1 of the inlet-side channel 341 is maximum.
  • the diameter of the nozzle hole 311 increases as it goes from the inlet 321 toward the outlet 331.
  • the nozzle hole 311 has a plurality of stages in which the diameter is increased.
  • a plurality of grooves 371 are provided in the outlet side flow path forming portion 351a that forms the outlet side flow path 351.
  • the plurality of grooves 371 are provided so as to extend from the inlet 321 side to the outlet 331 and to be arranged at equal intervals in the circumferential direction of the outlet-side flow path forming portion 351a. 4 and 5, the number of grooves 371 is omitted from the actual illustration for the sake of easy viewing.
  • FIG. 5 is an enlarged view of the vicinity of the outlet-side flow path 351 in FIG.
  • the distance D3 on the outlet 331 side is wider than the distance D3 on the inlet 321 side. More specifically, the interval D3 between the grooves 371 becomes wider from the inlet 321 side toward the outlet 331.
  • FIG. 6 is a view showing a state in which the periphery of the groove 371 is enlarged.
  • the width W1 on the outlet 331 side is wider than the width W1 on the imaginary line K1 side. More specifically, the width W1 of the groove 371 increases from the virtual line K1 side toward the outlet 331 side.
  • the width W1 on the outlet 331 side is wider than the width W1 on the inlet 321 side. More specifically, the width W1 of the groove 371 becomes wider from the inlet 321 side toward the outlet 331 side.
  • FIG. 7 is a cross section of the groove 371 shown in FIG. As shown in FIG. 7, in the depth DE1 of the groove 371, the depth DE1 on the outlet 331 side is deeper than the depth DE1 on the inlet 321 side. More specifically, the depth DE1 of the groove 371 becomes deeper from the inflow port 321 side toward the outflow port 331 side.
  • the fuel injection device 1 includes a body portion 30 that forms an injection hole 311 through which fuel is injected.
  • the body portion 30 includes an inlet-side channel forming portion 341 a that is connected to the fuel inlet 321 of the nozzle hole 311 and forms an inlet-side channel 341 that is a fuel channel.
  • the body portion 30 has an outlet-side channel forming portion 351a that is connected to the inlet-side channel 341 and the fuel outlet 331 of the nozzle hole 311 and forms an outlet-side channel 351 that is a fuel channel. is doing.
  • the surface roughness of the outlet-side channel forming part 351a is larger than the surface roughness of the inlet-side channel forming part 351a.
  • a plurality of grooves 371 extending from the inlet 321 side to the outlet 331 side are provided in the outlet-side channel forming portion 351a, so that the surface roughness of the outlet-side channel forming portion 351a and the inlet-side channel forming portion are increased.
  • the surface roughness of 351a is different.
  • the fuel becomes easy to follow along the groove 371 when passing through the outlet-side channel 351. And since a fuel spreads in the radial direction of the nozzle hole 311 along the groove
  • the interval D3 between the grooves 371 increases as it goes from the inlet 321 side toward the outlet 331 side. Further, the depth DE1 of the groove 371 is deeper from the inlet 321 side toward the outlet 331 side. Further, the width W1 of the groove 371 increases as it goes from the inlet 321 side to the outlet 331 side.
  • the fuel flowing through the outlet side flow path 351 becomes easier along the groove 371 toward the outlet 331 side. Further, the fuel passing through the groove 371 is easily divided. Therefore, the liquid film of the fuel injected from the outlet side flow path 351 is more likely to become thinner. Therefore, atomization is promoted.
  • outlet side flow path 351 is formed so as to increase in diameter from the inlet 321 side toward the outlet 331 side.
  • the surface roughness of the outlet-side channel forming portion 351a is made larger than the surface roughness of the inlet-side channel forming portion 341a by providing the groove 371 in the outlet-side channel forming portion 351a.
  • the surface roughness of the outlet side flow path forming part 351a is made larger than the surface roughness of the inlet side flow path forming part 341a.
  • a plurality of convex portions 381 are formed in the outlet side flow path forming portion 351 a of the nozzle hole 311. For this reason, the surface roughness of the outlet side flow path forming portion 351a is larger than the surface roughness of the inlet side flow path forming portion 341a.
  • the reference numerals are omitted, but the dots similar to the convex portions 381 with the reference numerals in FIG. 8 are the convex portions 381. Further, for the sake of easy viewing, the number of the convex portions 381 is omitted from the actual figure.
  • a plurality of convex portions 381 are provided in the outlet side flow path forming portion 351a.
  • the flow rate of the fuel is easily maintained when passing through the inlet-side flow path forming part 341a having a relatively small surface roughness.
  • the fuel whose flow rate is maintained tends to be disturbed when passing through the outlet-side flow path forming portion 351a having a relatively large surface roughness.
  • the fuel whose flow is disturbed is atomized by being diffused in various directions when injected from the outlet.
  • atomization is promoted by increasing the surface roughness of the outlet-side channel forming portion 351a as compared with the surface roughness of the inlet-side channel forming portion 341a. did.
  • the fuel injection device 1 of the present embodiment promotes atomization by changing the diameter expansion rate of the inlet side flow path 341 and the outlet side flow path 351.
  • the surface roughness of the outlet-side channel forming portion 351a and the inlet-side channel forming portion 341a are the same.
  • FIG. 9 illustrates the state of the nozzle hole 311 in the present embodiment.
  • the inlet-side flow path 341 has a diameter D1 that is increased from the inlet 321 side toward the outlet 331, that is, the diameter is increased.
  • the outlet-side flow path 351 has a diameter D2 that is expanded, that is, expanded, from the inlet 321 side toward the outlet 331 side.
  • the diameter expansion rate which is the degree to which the diameter D1 is expanded, is constant.
  • the diameter expansion rate which is the degree to which the diameter D2 expands, increases as it goes from the inlet 321 side to the outlet 331 side. Further, the diameter D2 is larger than the diameter D1.
  • the diameter of the inlet-side channel 341 and the outlet-side channel 351 is increased from the inlet 321 side toward the outlet 331 side.
  • the diameter expansion rate which is the degree to which the outlet side channel 351 is expanded, is larger than the diameter expansion rate, which is the degree to which the inlet side channel 341 is expanded.
  • the liquid film first becomes thin.
  • the fuel whose liquid film has been thinned in advance in the inlet-side flow path 341 becomes thinner in the outlet-side flow path 351 having a larger diameter expansion ratio than the inlet-side flow path 341. Therefore, the fuel injected from the outlet 331 is atomized because the liquid film becomes thin.
  • the nozzle hole 311 enters the outlet-side flow path 351.
  • a vortex is generated by the separation of fuel from the inner wall. Then, the fuel is pulled by the outlet-side flow path forming portion 351a by the negative pressure of the vortex, so that the liquid film of the fuel becomes thin.
  • the vortex is likely to occur. That is, the fuel film becomes thinner.
  • the diameter expansion rate which is the degree to which the diameter D2 of the outlet-side flow path 351 is increased, is increased from the inlet 321 side toward the outlet 331 side.
  • the diameter expansion rate which is the degree to which the diameter D ⁇ b> 2 of the outlet side channel 351 is expanded, is constant.
  • the inlet-side channel 341 and the outlet-side channel 351 are increased in diameter from the inlet 321 side toward the outlet 331 side.
  • the diameter D1 of the inlet-side flow path 341 and the diameter D2 of the outlet-side flow path 351 are between the inlet 321 and the outlet 331, as shown in FIG. , Constant (same).
  • the groove 361 is also formed in the inlet-side flow path forming portion 341a. This makes it easier for fuel to follow the groove 361 of the inlet-side flow path forming portion 341a. As a result, the fuel film becomes even thinner. Therefore, atomization of the fuel injected from the outlet 331 is further promoted.
  • the inlet-side channel forming part 341 a and the outlet-side channel forming part 351 a are directed from the inlet 321 side to the outlet 331 side in the inlet-side channel 341 and the outlet-side channel 351. Accordingly, the diameter expansion rate, which is the degree of diameter expansion of the flow path, is increased.
  • FIG. 13 shows a part of the fuel injection device according to the seventh embodiment of the present disclosure.
  • the diameter D1 of the inlet-side channel 341 and the diameter D2 of the outlet-side channel 351 are constant (same).
  • a plurality of convex portions 381 are formed in the outlet side flow path forming portion 351a.
  • the surface roughness of the inlet-side channel forming part 341a is Rz1
  • the surface roughness of the outlet-side channel forming part 351a is Rz2
  • the inlet-side channel forming part 341a and the outlet-side channel forming part 351a are: Rz2> Rz1 and Rz2 / Rz1 ⁇ 2 are satisfied. That is, the surface roughness Rz2 of the outlet-side channel forming portion 351a is larger than the surface roughness Rz1 of the inlet-side channel forming portion 341a, and is twice or more than Rz1.
  • Rz2 / Rz1 is 2 or more
  • the turbulent energy of the fuel injected from the injection hole is significantly increased. Therefore, the turbulent energy of the fuel injected from the nozzle hole 311 of this embodiment is large.
  • the outlet side The flow path forming part 351a is formed to satisfy the relationship of Rza ⁇ Rzb. That is, the outlet-side flow path forming portion 351a has a larger surface roughness Rzb in the circumferential direction than the surface roughness Rza in the direction from the inlet 321 side toward the outlet 331 side.
  • the length of the inlet-side channel forming portion 341a in the direction of the central axis C21 is the length from the inlet 321 to the outlet-side channel 351 of the central axis C21, and the outlet-side channel forming portion.
  • the length of the central axis C21 in the direction of the central axis C21 is the length from the inlet-side flow path 341 to the outlet 331 of the central axis C21.
  • the surface roughness Rz2 of the outlet-side channel forming portion 351a is larger than the surface roughness Rz1 of the inlet-side channel forming portion 341a. Therefore, the fuel flow velocity can be increased in the inlet-side flow path 341, and the energy of the fuel with the increased flow velocity can be effectively converted into turbulent energy in the outlet-side flow path 351. Therefore, by improving the turbulent energy, atomization of the fuel injected from the nozzle hole 311 and improvement of the fuel drainage can be achieved.
  • the outlet-side flow path forming portion 351a has a larger circumferential surface roughness Rzb than the surface roughness Rza in the direction from the inlet 321 toward the outlet 331. Therefore, in the nozzle hole 311, the turbulent energy can be improved in the outlet side channel 351 in a state where the directivity of the fuel is ensured in the inlet side channel 341.
  • the surface roughness Rz2 of the outlet side flow path forming portion 351a is at least twice the surface roughness Rz1 of the inlet side flow path forming portion 341a. Therefore, the turbulent energy of the fuel injected from the nozzle hole 311 can be increased.
  • atomization of fuel injected from the injection hole 311 and reduction of penetration force can be achieved.
  • FIG. 15 A part of the fuel injection device according to the eighth embodiment of the present disclosure is illustrated in FIG. 15.
  • the shape of the outlet side flow path forming portion 351a is different from that of the seventh embodiment.
  • the outlet-side flow path forming portion 351a is formed in a tapered shape so as to increase in diameter from the inlet 321 side toward the outlet 331 side at a constant expansion ratio. Therefore, the area of the outlet 331 is larger than the area of the inlet 321.
  • the eighth embodiment is the same as the seventh embodiment except for the points described above.
  • the area of the outlet 331 is larger than the area of the inlet 321.
  • the contact area between the fuel and the wall surface (inlet side channel forming portion 341a) in the inlet side channel 341 is small.
  • the contact area between the fuel and the wall surface (outlet side channel forming part 351a) is larger because the turbulent energy is improved by the convex part 381.
  • the area of the outlet-side flow path forming part 351a can be increased while the area of the outlet 331 is larger than the area of the inlet 321 and the area of the inlet-side flow path forming part 341a is reduced. Therefore, it is possible to achieve both improvement in the speed of fuel in the nozzle hole 311 and improvement in turbulent energy. Therefore, atomization of the fuel injected from the injection hole 311 and reduction of the penetration force can be achieved.
  • FIG. 16 shows a part of the fuel injection device according to the ninth embodiment of the present disclosure.
  • the shapes of the inlet-side channel forming part 341a and the outlet-side channel forming part 351a are different from those in the eighth embodiment.
  • the inlet-side flow path forming portion 341a and the outlet-side flow path forming portion 351a are formed in a tapered shape so as to increase in diameter from the inlet 321 side toward the outlet 331 side at a constant diameter expansion rate.
  • the inner diameter of the nozzle hole 311 continuously increases from the inlet 321 side toward the outlet 331 side.
  • the diameter expansion rate that is the degree of diameter expansion of the inlet side flow channel 341 and the diameter expansion rate that is the degree of diameter expansion of the outlet side flow channel 351 are the inlet side flow channel 341 and the outlet side flow channel 351. Is the same at the boundary (K1).
  • the area of the outlet 331 is larger than the area of the inlet 321.
  • the ninth embodiment is the same as the eighth embodiment except for the points described above.
  • the inlet-side channel 341 and the outlet-side channel 351 are each formed so as to increase in diameter from the inlet 321 side toward the outlet 331 side.
  • the diameter expansion rate that is the degree of diameter expansion of the inlet side flow channel 341 and the diameter expansion rate that is the degree of diameter expansion of the outlet side flow channel 351 are the boundary between the inlet side flow channel 341 and the outlet side flow channel 351. The same. Therefore, it is possible to eliminate a sudden change in diameter between the inlet-side flow path 341 and the outlet-side flow path 351, to spread the fuel uniformly, and to suppress variations in the flowing direction that affects directivity. .
  • FIG. 17 shows a part of the fuel injection device according to the tenth embodiment of the present disclosure.
  • the shapes of the inlet-side channel forming part 341a and the outlet-side channel forming part 351a are different from those in the ninth embodiment.
  • the inlet-side channel forming part 341a and the outlet-side channel forming part 351a are formed so that the diameter expansion rate gradually increases from the inlet 321 side toward the outlet 331 side. Therefore, the inlet-side flow path forming part 341a and the outlet-side flow path forming part 351a are arranged such that the contour of the inner wall in the cross section of the virtual plane including the central axis C21 of the injection hole 311 is directed from the inlet 321 side to the outlet 331 side. It is formed in a curved shape away from the central axis C21. The area of the outlet 331 is larger than the area of the inlet 321.
  • the tenth embodiment is the same as the ninth embodiment except for the points described above.
  • FIG. 11th Embodiment A part of the fuel injection device according to the eleventh embodiment of the present disclosure is shown in FIG. In 11th Embodiment, the shape of the body part 30 differs from 7th Embodiment.
  • the body part 30 has a throttle part 391.
  • the throttle portion 391 is formed in an annular shape, and is provided on the inflow port 321 side with respect to the outlet-side flow path forming portion 351a.
  • the throttle portion 391 is formed integrally with the inlet-side flow path forming portion 341a so that the outer edge portion is connected to the inlet-side flow path forming portion 341a.
  • the throttle portion 391 has a central opening area smaller than the area of the inflow port 321.
  • the eleventh embodiment is the same as the seventh embodiment except for the points described above.
  • the body portion 30 has the throttle portion 391 provided on the inlet 321 side with respect to the outlet-side flow path forming portion 351a and having a central opening area smaller than the area of the inlet 321. is doing. Therefore, the fuel passing through the opening of the throttle 391 has a high flow rate. Thereby, the turbulent energy can be improved more effectively by guiding the fuel whose flow velocity is increased to the outlet-side channel 351 having a large surface roughness.
  • the fuel injection device 1 is applied to, for example, a gasoline engine (hereinafter simply referred to as “engine”) 80 as an internal combustion engine, and injects gasoline as fuel and supplies it to the engine 80 (see FIG. 19).
  • engine a gasoline engine
  • FIG. 19 the fuel injection device 1 is applied to, for example, a gasoline engine (hereinafter simply referred to as “engine”) 80 as an internal combustion engine, and injects gasoline as fuel and supplies it to the engine 80 (see FIG. 19).
  • the engine 80 includes a cylindrical cylinder block 81, a piston 82, a cylinder head 90, an intake valve 95, an exhaust valve 96, and the like.
  • the piston 82 is provided so as to be capable of reciprocating inside the cylinder block 81.
  • the cylinder head 90 is made of aluminum, for example, and is provided so as to close the opening end of the cylinder block 81.
  • a combustion chamber 83 is formed between the inner wall of the cylinder block 81, the wall surface of the cylinder head 90, and the piston 82. The volume of the combustion chamber 83 increases or decreases as the piston 82 reciprocates.
  • the cylinder head 90 has an intake manifold 91 and an exhaust manifold 93.
  • An intake passage 92 is formed in the intake manifold 91.
  • One end of the intake passage 92 is open to the atmosphere side, and the other end is connected to the combustion chamber 83.
  • the intake passage 92 guides air sucked from the atmosphere side (hereinafter referred to as “intake”) to the combustion chamber 83.
  • An exhaust passage 94 is formed in the exhaust manifold 93.
  • the exhaust passage 94 has one end connected to the combustion chamber 83 and the other end opened to the atmosphere side.
  • the exhaust passage 94 guides air containing combustion gas generated in the combustion chamber 83 (hereinafter referred to as “exhaust”) to the atmosphere side.
  • the intake valve 95 is provided in the cylinder head 90 so as to be reciprocally movable by rotation of a cam of a driven shaft that rotates in conjunction with a drive shaft (not shown).
  • the intake valve 95 can open and close between the combustion chamber 83 and the intake passage 92 by reciprocating.
  • the exhaust valve 96 is provided in the cylinder head 90 so as to be reciprocally movable by rotation of the cam.
  • the exhaust valve 96 can open and close between the combustion chamber 83 and the exhaust passage 94 by reciprocating.
  • the fuel injection device 1 is mounted on the cylinder block 81 side of the intake passage 92 of the intake manifold 91.
  • the fuel injection device 1 is provided such that the shaft is inclined with respect to the shaft of the combustion chamber 83 or is in a twisted relationship. In the present embodiment, the fuel injection device 1 is so-called side-mounted on the engine 80.
  • an ignition plug 97 as an ignition device is provided between the intake valve 95 and the exhaust valve 96 of the cylinder head 90, that is, at a position corresponding to the center of the combustion chamber 83.
  • the fuel injection device 1 is provided in the hole 901 of the cylinder head 90 so that the plurality of injection holes 31 are exposed to the combustion chamber 83.
  • the fuel injection device 1 is supplied with fuel pressurized to a fuel injection pressure by a fuel pump (not shown).
  • a conical spray Fo is injected into the combustion chamber 83 from the plurality of injection holes 31 of the fuel injection device 1.
  • the spark plug 97 has a discharge part 971 exposed in the combustion chamber 83, and can ignite the fuel (spray Fo) injected from the injection hole 31 by the discharge of the discharge part 971.
  • the injection hole 31 (311) is formed along the inner wall of the end portion on the outlet 331 side of the outlet-side flow path forming part 351a in a state where the fuel injection device 1 is provided in the engine 80. It is formed so that at least a part of the discharge part 971 is located inside the outlet side virtual cylindrical surface T1 extending in a cylindrical shape in the direction of the central axis C21 (see FIG. 20).
  • the nozzle hole 31 (311) is the inner wall of the end portion on the outlet side flow passage forming portion 351a side of the inlet side flow passage forming portion 341a in a state where the fuel injection device 1 is provided in the engine 80. Is formed so that at least a part of the discharge part 971 is positioned inside the inlet side virtual cylindrical surface T2 extending in a cylindrical shape in the direction of the central axis C21 of the nozzle hole 311 (see FIG. 20).
  • the nozzle hole 31 (311 ) Is formed so as to satisfy the relationship of Dd ⁇ Ds / 2 (see FIGS. 19 and 20).
  • the coil 38 is surrounded by the inner wall of the cylinder head 90 that forms the hole 901 in a state where the fuel injection device 1 is provided in the hole 901 (see FIG. 19).
  • the fuel injection device 1 includes a movable core 47 that can be moved relative to the needle 40 and can be reciprocated in the housing 20 together with the needle 40 (see FIG. 1).
  • the fuel injection device 1 includes the control unit 10 that can control the power supplied to the coil 38 and control the movement of the needle 40 to the side opposite to the valve seat 34. And the control part 10 can perform the partial control which controls the movement to the opposite side to the valve seat 34 of the needle 40 so that it may be a part of movement within the movable range of the needle 40 (FIG. 1, 19). reference).
  • the injection hole 31 (311) is the inner wall of the end portion on the outlet 331 side of the outlet-side channel forming portion 351a in a state where the fuel injection device 1 is provided in the engine 80. Is formed so that at least a part of the discharge portion 971 is located inside the outlet-side virtual cylindrical surface T1 extending in a cylindrical shape in the direction of the central axis C21 of the nozzle hole 311 (see FIG. 20). Since the fuel injection device 1 of the present embodiment has an effect of reducing the penetration force of the fuel (spray Fo) injected from the injection hole 31, it is possible to keep the spray Fo near the discharge portion 971 of the spark plug 97. . Therefore, fuel shortage near the discharge part 971 (ignition point) can be suppressed, and ignition can be performed with a small amount of fuel. Thereby, useless fuel injection can be suppressed, and fuel consumption can be improved while reducing soot.
  • the nozzle hole 31 (311) is the inner wall of the end portion on the outlet side flow passage forming portion 351a side of the inlet side flow passage forming portion 341a in a state where the fuel injection device 1 is provided in the engine 80. Is formed so that at least a part of the discharge part 971 is positioned inside the inlet side virtual cylindrical surface T2 extending in a cylindrical shape in the direction of the central axis C21 of the nozzle hole 311 (see FIG. 20). Therefore, the spray Fo can be kept nearer to the discharge part 971 of the spark plug 97. Thereby, useless fuel injection can be further suppressed, and fuel consumption can be further improved while reducing soot.
  • the nozzle hole 31 (311 ) Is formed so as to satisfy the relationship of Dd ⁇ Ds / 2 (see FIGS. 19 and 20). That is, in the present embodiment, the distance (Dd) between the nozzle hole 31 (311) and the discharge part 971 is less than or equal to half the diameter (Ds) of the combustion chamber 83.
  • the fuel injection device 1 of the present embodiment has an effect of reducing the penetration force of the fuel (spray Fo) injected from the injection hole 31, the distance (Dd) between the injection hole 31 (311) and the discharge part 971 is As in this embodiment, it is desirable to be small.
  • the nozzle hole 31 (311) is se. It is formed so as to satisfy the relationship of / Ss ⁇ Ds / Dd (see FIGS. 19 and 20). That is, in the present embodiment, the penetration force of the fuel spray Fo becomes smaller as Dd is smaller than Ds according to the relationship between the distance Dd between the center of the outlet 331 and the discharge part 971 and the diameter Ds of the combustion chamber 83.
  • the axial length Ss of the inlet side flow path forming portion 341a and the axial length Se of the outlet side flow path forming portion 351a are set.
  • the fuel spray Fo can be kept near the discharge part 971 according to the arrangement of the fuel injection device 1 and the spark plug 97.
  • the coil 38 is surrounded by the inner wall of the cylinder head 90 that forms the hole 901 in a state where the fuel injection device 1 is provided in the hole 901 (see FIG. 19). Since the fuel injection device 1 according to the present embodiment is provided in the engine 80 so that the coil 38 is surrounded by the inner wall of the cylinder head 90, there is a possibility that when a current flows through the coil 38, the cylinder head may be affected by magnetism. . Therefore, there is a possibility that variations in fuel injection may occur between individual fuel injection devices 1 and between cylinder blocks 81 (cylinders). Further, the distance between the coil 38 and the inner wall of the cylinder head 90 may change due to secular change, vibration of the engine 80, or the like, and the variation may become more remarkable.
  • the fuel injection device 1 of this embodiment can arrange the atomized fuel in the vicinity of the discharge part 971 (ignition point). Further, since the penetration force of the fuel spray Fo can be reduced, the fuel spray Fo can be disposed in the vicinity of the ignition point. Therefore, the uniform fuel spray Fo can be supplied near the ignition point, and stable ignition can be maintained even if the amount of the injected fuel varies.
  • the fuel injection device 1 includes a movable core 47 that can be moved relative to the needle 40 and can be reciprocated in the housing 20 together with the needle 40 (see FIG. 1).
  • the movable core 47 moves toward the valve seat 34 even after the needle 40 abuts (closes) the valve seat 34.
  • the risk of the next injection increases dramatically. Since the fuel injected by the secondary injection is injected in a state where the needle 40 cannot be raised, it is injected in a region where the pressure loss is very high. Therefore, it is difficult to atomize the fuel and the fuel is injected later than the assumed injection timing, so the fuel evaporation time is also short.
  • the fuel injection device 1 of the present embodiment can efficiently atomize the fuel through the injection holes 31 even at a low fuel pressure, the amount of soot generated when secondary injection is performed can be reduced.
  • the fuel injection device 1 includes the control unit 10 that can control the power supplied to the coil 38 and control the movement of the needle 40 to the side opposite to the valve seat 34. And the control part 10 can perform the partial control which controls the movement to the opposite side to the valve seat 34 of the needle 40 so that it may be a part of movement within the movable range of the needle 40 (FIG. 1, 19). reference).
  • the needle 40 cannot be fully raised, and as described above, the pressure loss of the injected fuel is large and atomization is difficult. Therefore, it becomes a cause of local richness in the combustion stroke, and the amount of soot may increase.
  • the fuel injection device 1 of the present embodiment can efficiently atomize the fuel through the injection holes 31 even at a low fuel pressure, the amount of soot generated when performing partial control can be reduced.
  • FIG. 13th Embodiment A fuel injection device according to a thirteenth embodiment of the present disclosure is shown in FIG.
  • the thirteenth embodiment differs from the twelfth embodiment in the arrangement of the fuel injection device 1.
  • the fuel injection device 1 is mounted between the intake valve 95 and the exhaust valve 96 of the cylinder head 90, that is, at a position corresponding to the center of the combustion chamber 83.
  • the fuel injection device 1 is provided so that its axis is substantially parallel to or substantially coincident with the axis of the combustion chamber 83.
  • the fuel injection device 1 is so-called center mounted on the engine 80.
  • the cylinder head 90 is provided with a spark plug 97 as an ignition device.
  • the fuel injection device 1 is provided in the hole 902 of the cylinder head 90 so that the plurality of injection holes 31 are exposed to the combustion chamber 83.
  • the spark plug 97 has a discharge part 971 exposed in the combustion chamber 83, and can ignite the fuel (spray Fo) injected from the injection hole 31 by the discharge of the discharge part 971.
  • the relationship between the length and the axial length Se of the outlet-side flow path forming portion 351a is the same as in the twelfth embodiment.
  • the coil 38 is surrounded by the inner wall of the cylinder head 90 that forms the hole 902 in a state where the fuel injection device 1 is provided in the hole 902. Yes. Therefore, in the thirteenth embodiment, the same effects as in the twelfth embodiment can be achieved.
  • a plurality of grooves 371 extending from the inflow port 321 side to the outflow port 331 side are formed in the outlet side flow path forming portion 351a in the circumferential direction is shown.
  • a plurality of grooves extending in the circumferential direction are formed in the outlet-side channel forming portion 351a from the inlet 321 side to the outlet 331 side, and the outlet-side channel forming portion is formed.
  • the surface roughness may be larger than the surface roughness of the inlet-side flow path forming portion 341a.
  • the distance D3 between the grooves 371 is increased from the inlet 321 side toward the outlet 331 side, and the depth DE1 of the groove 371 is increased from the inlet 321 side to the outlet 331 side.
  • An example is shown in which the width W1 of the groove 371 is increased toward the outlet 331 from the inlet 321 side.
  • the interval between the grooves, the depth of the grooves, and the width of the grooves may be set in any manner.
  • the fuel injection device 1 can be applied to a fuel injection device for a diesel engine. Further, the present invention can be applied to a fuel injection valve other than the direct injection type such as a port injection type.
  • the present disclosure is not limited to the above embodiment, and can be implemented in various forms without departing from the gist thereof.
  • the nozzle hole 31 was formed by performing laser irradiation from the outer side of the body part 30, it can be formed by various methods, such as electric discharge machining, cutting, and 3D printing. I can do it.

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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

L'invention concerne un dispositif d'injection de carburant, lequel dispositif comporte une section de corps (30) qui forme un trou d'injection (311) à travers lequel un carburant est injecté. La section de corps (30) comporte : une section de formation de passage d'écoulement côté entrée (341a), qui est reliée à une entrée de carburant (321) de l'orifice d'injection (311), et qui forme un canal d'écoulement côté entrée (341), c'est-à-dire une partie d'un canal d'écoulement de carburant ; et une section de formation de passage d'écoulement côté sortie (351a), qui est reliée au canal d'écoulement côté entrée (341) et à une sortie de carburant (331) de l'orifice d'injection (311), et qui forme un canal d'écoulement côté sortie (351), c'est-à-dire une partie du canal d'écoulement de carburant. La rugosité de surface de la section de formation de passage d'écoulement côté sortie (351a) est supérieure à celle de la section de formation de passage d'écoulement côté entrée (341a).
PCT/JP2016/001665 2015-04-09 2016-03-23 Dispositif d'injection de carburant WO2016163086A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680019284.6A CN107407245B (zh) 2015-04-09 2016-03-23 燃料喷射装置
DE112016001634.4T DE112016001634T5 (de) 2015-04-09 2016-03-23 Kraftstoffeinspritzvorrichtung
US15/554,095 US10280887B2 (en) 2015-04-09 2016-03-23 Fuel injection device

Applications Claiming Priority (4)

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JP2015-080286 2015-04-09
JP2015080286 2015-04-09
JP2015-147790 2015-07-27
JP2015147790A JP6292188B2 (ja) 2015-04-09 2015-07-27 燃料噴射装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210123403A1 (en) * 2018-07-12 2021-04-29 Denso Corporation Fuel injection valve

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2007032421A (ja) * 2005-07-27 2007-02-08 Toyota Motor Corp 燃料噴射弁
JP2010048237A (ja) * 2008-08-25 2010-03-04 Denso Corp 燃料噴射ノズルおよびその製造方法
JP2013199876A (ja) * 2012-03-26 2013-10-03 Hitachi Automotive Systems Ltd 火花点火式筒内噴射弁
JP2014218977A (ja) * 2013-05-10 2014-11-20 株式会社デンソー 燃料噴射制御装置および燃料噴射システム
JP2015214892A (ja) * 2014-05-08 2015-12-03 日立オートモティブシステムズ株式会社 燃料噴射弁

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007032421A (ja) * 2005-07-27 2007-02-08 Toyota Motor Corp 燃料噴射弁
JP2010048237A (ja) * 2008-08-25 2010-03-04 Denso Corp 燃料噴射ノズルおよびその製造方法
JP2013199876A (ja) * 2012-03-26 2013-10-03 Hitachi Automotive Systems Ltd 火花点火式筒内噴射弁
JP2014218977A (ja) * 2013-05-10 2014-11-20 株式会社デンソー 燃料噴射制御装置および燃料噴射システム
JP2015214892A (ja) * 2014-05-08 2015-12-03 日立オートモティブシステムズ株式会社 燃料噴射弁

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210123403A1 (en) * 2018-07-12 2021-04-29 Denso Corporation Fuel injection valve

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