WO2015151767A1 - 燃料ポンプの取付構造 - Google Patents

燃料ポンプの取付構造 Download PDF

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Publication number
WO2015151767A1
WO2015151767A1 PCT/JP2015/057537 JP2015057537W WO2015151767A1 WO 2015151767 A1 WO2015151767 A1 WO 2015151767A1 JP 2015057537 W JP2015057537 W JP 2015057537W WO 2015151767 A1 WO2015151767 A1 WO 2015151767A1
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WO
WIPO (PCT)
Prior art keywords
fuel pump
side wall
cylinder head
wall portion
pump mounting
Prior art date
Application number
PCT/JP2015/057537
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕太郎 小杉
Original Assignee
スズキ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by スズキ株式会社 filed Critical スズキ株式会社
Priority to DE112015000036.4T priority Critical patent/DE112015000036B4/de
Priority to CN201580000168.5A priority patent/CN105143657B/zh
Publication of WO2015151767A1 publication Critical patent/WO2015151767A1/ja

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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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads

Definitions

  • the present invention relates to a fuel pump mounting structure, and more particularly to a fuel pump mounting structure for supplying fuel to an internal combustion engine mounted on a vehicle such as an automobile.
  • the fuel pump is attached to the cylinder head by being sandwiched between a semicircular cutout formed in the outer surface portion of the cylinder head and a semicircular cutout formed in the wall portion of the support member. .
  • This fuel pump is driven by a pump drive cam of the cam shaft.
  • the fuel pump is arranged substantially horizontally and perpendicular to the axial direction of the horizontal camshaft. For this reason, in said attachment structure, enlarging the full length of an engine is suppressed.
  • the support member since the support member has a plurality of cam caps, the fuel pump is firmly supported by the cylinder head.
  • the above-described mounting structure has a problem that noise is generated by vibration or the ride comfort of the vehicle is deteriorated.
  • a reinforcing member is provided in the mounting structure to suppress vibration or the rigidity of the fuel pump is increased, the weight of the mounting structure or the fuel pump increases or the manufacturing cost increases. There's a problem.
  • the fuel pump is supported on the side surface portion of the cylinder head by the support member, and is disposed so as to be substantially horizontal with respect to the upper surface of the cylinder head. For this reason, in the above-described mounting structure, there is a problem in that the degree of freedom of arrangement of components such as intake manifold piping arranged on the side surface of the cylinder head is reduced.
  • the present invention has been made in order to solve the above-described problems, and has high rigidity without increasing the weight and manufacturing cost as compared with the conventional one, and the side surface portion of the cylinder head. It is an object of the present invention to provide a fuel pump mounting structure capable of increasing the degree of freedom in arrangement.
  • a first aspect of the present invention is a fuel pump mounting structure driven by a pump drive cam of a cam shaft rotatably supported by a cylinder head, wherein the fuel pump is attached to the cylinder head.
  • a fuel pump mounting bracket to be mounted the fuel pump mounting bracket having a first side wall extending in an axial direction of the cam shaft, a second side wall extending in a direction intersecting with the cam shaft, and a first side wall; And a fuel pump mounting boss for mounting the fuel pump, and the fuel pump mounting boss on the first side wall, the second side wall and the connection wall. It is composed of what is supported.
  • the camshaft is an intake-side camshaft
  • the fuel pump mounting boss is positioned above the cylinder head and opens toward the intake-side camshaft. It may be.
  • the fuel pump mounting bracket has a fastening portion for fastening the vacuum pump driven by the camshaft, the fastening portion is located above the connecting wall portion, and the fuel pump mounting You may make it locate in the side spaced apart from the cam shaft of a boss
  • the second side wall portion has a bearing support portion that rotatably supports the cam shaft from above, and the bearing support portion is arranged in a direction perpendicular to the axis of the cam shaft. You may make it have a fastening hole on both sides.
  • a connection part is a 1st connection point where a 1st side wall part and a 2nd side wall part cross, a 1st connection point where a connection part and a 1st side wall part are connected, a connection part, It may have a 2nd connection point with which the 2nd side wall part is connected, and it may be made for an intersection, a 1st connection point, and a 2nd connection point to form a triangle.
  • the connecting portion is formed in a flat shape and has a seal member mounting surface for mounting a seal member for sealing the cylinder head cover and the cylinder head disposed on the upper portion of the cylinder head. Also good.
  • the fuel pump mounting bracket may be formed integrally with a cylinder head cover disposed on the cylinder head.
  • the fuel pump mounting boss is supported by the three wall portions of the first side wall portion, the second side wall portion, and the connecting wall portion of the fuel pump mounting bracket.
  • the rigidity of the fuel pump mounting boss portion is increased without increasing the weight and the manufacturing cost.
  • the fuel pump mounting boss is located above the cylinder head and opens toward the intake-side camshaft. Therefore, the fuel pump mounting bracket must be provided on the side wall of the cylinder head. Disappears.
  • the fuel pump mounting boss is supported by the three wall portions of the first side wall portion, the second side wall portion, and the connecting wall portion of the fuel pump mounting bracket, and is positioned above the cylinder head, and is located on the intake side. Since the opening is directed toward the camshaft, the fuel pump mounting boss portion can be disposed on the upper portion of the cylinder head. As a result, the degree of freedom in installing the intake manifold piping is increased.
  • the vacuum pump is fastened to the fuel pump mounting bracket at the fastening portion located above the connecting wall portion and located on the side away from the cam shaft of the fuel pump mounting boss portion.
  • the rigidity of the mounting structure is enhanced by the fuel pump mounting bracket and the vacuum pump.
  • the bearing support part of a 2nd side wall part has a fastening hole in the both sides of a bearing support part in the direction orthogonal to the axis line of a cam shaft, a bearing support part straddles a cam shaft and both sides And is fastened to the cylinder head via a fastening hole. As a result, the bearing support portion is prevented from being deformed so as to fall down.
  • a load is applied to the first side wall portion of the fuel pump mounting bracket by the pump driving cam in a direction away from the cam shaft. Since the intersection, the first connection point, and the second connection point form a triangle, the applied load can be effectively transmitted from the first side wall to the second side wall, and deformation of the first side wall is suppressed. Is done.
  • a part of Linder head cover can be attached to a connection wall part via a sealing member, the rigidity of a connection wall part is improved and the bearing support part of a 2nd side wall part falls down. Thus, the deformation is suppressed.
  • the fuel pump mounting bracket is formed integrally with the cylinder head cover disposed on the upper portion of the cylinder head, it is not necessary to provide the fuel pump mounting bracket separately from the cylinder head cover. The number of parts is reduced, and an increase in manufacturing cost is suppressed.
  • FIG. 1 is a diagram showing an embodiment of a fuel pump mounting structure according to the present invention, and is a plan view of a vehicle engine.
  • FIG. 2 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a side view of the engine as viewed from the left side of the vehicle.
  • FIG. 3 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a perspective view of the upper part of the engine as viewed from the left side of the vehicle with the cylinder head cover removed.
  • FIG. 4 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a perspective view of the upper part of the engine as viewed from the front side of the vehicle with the cylinder head cover removed.
  • FIG. 1 is a diagram showing an embodiment of a fuel pump mounting structure according to the present invention, and is a plan view of a vehicle engine.
  • FIG. 2 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a side view of the
  • FIG. 5 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a cross-sectional view taken along the line VV of FIG.
  • FIG. 6 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a perspective view of the fuel pump mounting bracket as viewed from the left side of the vehicle.
  • FIG. 7 is a view showing an embodiment of the fuel pump mounting structure of the present invention, and is a perspective view of the fuel pump mounting bracket as viewed from the front side of the vehicle.
  • FIGS. 1 to 5 show an engine having a fuel pump mounting structure according to the present embodiment
  • FIGS. 6 and 7 show a fuel pump mounting bracket.
  • the engine 1 is a horizontal four-cycle engine that performs a series of four strokes including an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke while a piston (not shown) reciprocates twice in a cylinder.
  • the engine 1 according to this embodiment includes a cylinder head 11, an intake camshaft 12 as a cam shaft, an exhaust camshaft 13, a fuel pump 14, and a fuel pump mounting bracket 15. I have.
  • the fuel pump mounting bracket 15 is fixed to the cylinder head 11 with a plurality of bolts 16.
  • a cylinder head cover 17 is attached on the cylinder head 11.
  • the fuel pump mounting structure includes a cylinder head 11, an intake camshaft 12, a fuel pump mounting bracket 15, and a bolt 16.
  • the engine 1 includes a low-pressure fuel supply pipe 19 that supplies fuel to the fuel pump 14, and a fuel supply pipe 21 that discharges the pressure-regulated fuel from the fuel pump 14. And a vacuum pump 23.
  • the engine 1 includes a delivery pipe 22 that supplies fuel discharged from a fuel supply pipe 21 to a fuel injection unit (not shown).
  • the engine 1 includes an intake manifold 24, an exhaust manifold 25, a cylinder block (not shown) that houses a piston (not shown), and a crankcase (not shown) that houses a crankshaft (not shown).
  • the engine 1 outputs the power by converting the reciprocating motion of the piston into the rotational motion of the crankshaft.
  • the cylinder head 11 includes a rear side wall portion 31, a front side wall portion 32, a left side wall portion 33, and a right side wall portion 34.
  • An upper opening 35 is formed on the upper surface of the cylinder head 11.
  • the lower portion of the cylinder head 11 has a bottom side wall portion.
  • the external appearance of this cylinder head 11 is a rectangular parallelepiped shape. Inside the cylinder head 11 are formed combustion chambers, intake ports, exhaust ports, intake valves and exhaust valve housings, water jackets, etc., not shown, corresponding to a plurality of cylinders.
  • the front, rear, left, and right and up and down directions in the drawing represent directions viewed from the driver's seat of the vehicle on which the engine 1 is mounted. Indicated by an arrow.
  • the present invention is not limited to the engine arrangement direction of the present embodiment.
  • an intake manifold 24 connected to each intake port is attached to the rear side wall portion 31, and air flowing through an air cleaner (not shown) is drawn into each combustion chamber from each intake port.
  • a mounting boss (not shown) in which a screw hole is formed is provided above the vicinity of the left side wall 33 of the rear side wall 31 in the cylinder head 11.
  • the fuel pump mounting bracket 15 is fixed to the cylinder head 11 by coupling the bolt 16 to the screw hole.
  • an exhaust manifold 25 connected to each exhaust port is attached to the front side wall portion 32.
  • Each exhaust port is exhausted from each combustion chamber.
  • the exhaust gas flowing through each exhaust port flows to an exhaust gas purification device (not shown) on the downstream side.
  • a vacuum pump 23 is attached to the left wall 33.
  • a mounting boss 33 a formed with a screw hole is provided at the center in the vehicle front-rear direction at the upper portion of the left side wall portion 33.
  • a plurality of mounting bosses 31 a, 32 a, and 33 a formed with screw holes are provided above the rear side wall portion 31, the front side wall portion 32, and the left side wall portion 33.
  • the cylinder head cover 17 has bolts 36 inserted through the mounting holes. Then, the bolt 36 is screwed into any one of the mounting bosses 31 a, 32 a, and 33 a at the corresponding location, and the cylinder head cover 17 is fixed to the cylinder head 11.
  • a central portion of the upper opening 35 has a plurality of bearing support portions 35a for rotatably supporting the intake camshaft 12 via a cam bearing (not shown) and an exhaust camshaft 13 via a cam bearing (not shown). And a plurality of bearing support portions 35b that are rotatably supported.
  • a pair of screw holes are respectively formed on the front side and the rear side across the bearing support portions 35a and 35b, and the bolts 37 are coupled to the upper surface of the cylinder head 11 through the screw holes.
  • the bearing support portions 35 a and 35 b are fixed to the cylinder head 11.
  • the intake camshaft 12 is disposed on the rear side of the upper opening 35 of the cylinder head 11 so as to be parallel to the rear side wall portion 31.
  • the intake camshaft 12 drives the shaft 12a, a plurality of cams 12b provided corresponding to each cylinder so as to open and close the intake valve, a pump drive cam 12c for driving the fuel pump 14, and a vacuum pump 23.
  • a drive portion 12d formed on the left side in the axial direction (the vehicle left-right direction in the present embodiment).
  • the intake camshaft 12 has a plurality of cam caps 12e for fixing the cam bearings corresponding to the bearing support portions 35a of the upper opening 35 of the cylinder head 11, and the cam caps 12e as screw holes of the bearing support portions 35a.
  • the exhaust camshaft 13 is disposed in parallel with the front side wall portion 32 on the front side of the upper opening 35 of the cylinder head 11. Similar to the intake camshaft 12, the exhaust camshaft 13 has a shaft 13a and a plurality of cams 13b provided corresponding to each cylinder so as to open and close the exhaust valve.
  • the exhaust camshaft 13 has a plurality of cam caps 13c for fixing the cam bearings corresponding to the bearing support portions 35b of the upper opening 35 of the cylinder head 11, and the cam caps 13c as screw holes of the bearing support portions 35b.
  • a timing chain (not shown) is wound around a timing sprocket (not shown) provided on an intake cam sprocket, an exhaust cam sprocket and a crankshaft (not shown). Accordingly, the rotational power of the crankshaft is transmitted to the intake camshaft 12 and the exhaust camshaft 13 via the timing chain.
  • the fuel pump 14 has a pump body 41. As shown in FIG. 5, a plunger 42 and an electromagnetic valve 43 are provided in the pump main body 41. A spring 44 that biases the plunger 42 is provided below the fuel pump 14. As shown in FIGS. 1 and 4, the pump body 41 is provided with a connector 45. The connector 45 is electrically connected to a controller (not shown). The fuel pump 14 has a check valve (not shown).
  • the pump body 41 is sucked by an intake port 41a for sucking fuel, a discharge port 41b for discharging fuel, a pressure chamber 41c communicating with the suction port 41a and the discharge port 41b, and an electromagnetic valve 43. And a seat portion 41d for opening and closing the port 41a.
  • the pump body 41 includes a cylinder 41e that slidably accommodates the plunger 42, and a flange 41f that attaches the pump body 41 to the fuel pump mounting bracket 15.
  • the suction port 41 a is connected to the low-pressure fuel supply pipe 19.
  • the discharge port 41b is connected to the fuel supply pipe 21.
  • the discharge port 41b is provided with a check valve (not shown). When the fuel pressure in the pressure chamber 41c exceeds a predetermined value, the valve is opened, and fuel is discharged from the discharge port 41b into the fuel supply pipe 21.
  • the plunger 42 has a roller 42a that contacts the pump drive cam 12c, and a lifter member 42b that rotatably supports the roller 42a.
  • the lifter member 42b is pressed toward the pump drive cam 12c by a spring 44, and the roller 42a is in contact with the pump drive cam 12c with a predetermined pressing force.
  • the plunger 42 reciprocates by the rotational movement of the pump drive cam 12c.
  • the suction port 41a is opened, and the fuel is sucked into the pressure chamber 41c whose volume is increased, and the plunger 42 is moved by the rotation of the pump drive cam 12c.
  • the suction port 41a is closed, and the pressure of the fuel sucked into the pressure chamber 41c is increased.
  • the electromagnetic valve 43 has a solenoid controlled by a controller, and opens the seat portion 41d when sucking fuel from the suction port 41a, and closes the seat portion 41d when increasing the fuel pressure.
  • the fuel pump mounting bracket 15 includes a first side wall 51 extending in the axial direction of the intake camshaft 12 (the vehicle left-right direction in this embodiment), and the intake camshaft 12.
  • a second side wall 52 extending in a direction substantially perpendicular to the axial direction (the vehicle left-right direction in the present embodiment), and a connection for integrally connecting the first side wall 51 and the second side wall 52. It has the wall part 53, the fuel pump attachment boss
  • the case where the second side wall portion 52 extends in a direction substantially perpendicular to the axial direction of the intake camshaft 12 has been described.
  • the second side wall portion 52 has the intake cam.
  • the present invention can also be applied to a case where the shaft 12 extends in a direction intersecting with the axial direction without making a right angle to the axial direction of the shaft 12.
  • FIG. 7 shows a bottom surface 51a of the first side wall 51.
  • the bottom surface 51a contacts the upper surface 31b of the rear side wall 31 of the cylinder head 11 shown in FIG.
  • an upper surface 51 b is formed on the side opposite to the bottom surface 51 a of the first side wall portion 51.
  • the first side wall 51 has a fixed boss 51 c that is fixed to the upper surface 31 b of the cylinder head 11 on the upper opening 35 side.
  • the fixed boss 51c is formed with a through hole 51d that penetrates the upper surface 51b and the bottom surface 51a. As shown in FIGS. 3 and 4, the bolt 16 is inserted into the through hole 51 d.
  • FIG. 7 shows the bottom surface 52a of the second side wall 52.
  • the bottom surface 52a contacts the upper surface 33b of the left side wall 33 of the cylinder head 11 shown in FIG.
  • An upper surface 52 b is formed on the side opposite to the bottom surface 52 a of the second side wall portion 52.
  • the second side wall portion 52 has fixed boss portions 52c and 52d. These fixed bosses 52c and 52d are formed with through holes 52g as fastening holes that penetrate the upper surface 52b and the bottom surface 52a in the fixed boss portion 52c that is fixed to the upper surface 33b on the upper opening 35 side of the cylinder head 11. ing.
  • the fixed boss portion 52d is formed with a through hole 52i as a fastening hole that penetrates the upper surface 52b and the bottom surface 52a.
  • Bolts 16 are respectively inserted into the through holes 52g and 52i, and the fuel pump mounting bracket 15 is fixed to the cylinder head 11 side as shown in FIG.
  • the second side wall 52 is formed to be recessed from the bottom surface 52 a in a semicircular shape so as to support the bearing of the intake camshaft 12 from above, so that the intake camshaft 12 can be rotated from above. It has a bearing support portion 52h for supporting.
  • the through holes 52g and 52i of the fixed bosses 52c and 52d of the present embodiment are respectively formed on both sides of the bearing support portion 52h so as to sandwich the bearing support portion 52h in a direction orthogonal to the axis of the intake camshaft 12. .
  • These through holes 52g and 52i constitute the fastening holes of the present invention.
  • the connecting wall 53 connects the vicinity of the upper surface 51b of the first side wall 51 and the vicinity of the upper surface 52b of the second side wall 52, and has a plate-like body having a predetermined thickness. It consists of As shown in FIG. 6, the connecting wall portion 53 is formed flat on the upper surface side. The connecting wall portion 53 has a seal member attachment surface 53 a for attaching a seal member (not shown) that seals the cylinder head cover 17 and the cylinder head 11.
  • the connecting wall portion 53 has an intersection point where the vicinity of the upper surface 51 b of the first side wall portion 51 and the vicinity of the upper surface 52 b of the second side wall portion 52 are defined as P1, and the right end of the connecting wall portion 53.
  • the first connection point where the portion and the vicinity of the upper surface 51b of the first side wall 51 are connected is P2, and the second connection point where the left end portion of the connection wall 53 and the vicinity of the upper surface 52b of the second side wall 52 are connected.
  • Is P3, and points P1, P2, and P3 are connected by straight lines, a triangle is formed by P1, P2, and P3.
  • the fuel pump mounting boss portion 54 has a main body 54 a and a flange 54 b for fixing the fuel pump 14. As shown in FIG. 7, the main body 54a is formed with an attachment hole 54c that opens toward the intake camshaft 12 and attaches the fuel pump 14.
  • the main body 54 a is provided integrally with the front side portion of the first side wall portion 51, that is, the inner portion, and is provided integrally with the right side portion of the second side wall portion 52, that is, the inner portion, and in the vicinity of the intersection P 1 of the connecting wall portion 53. It is provided integrally with the part.
  • the wall portion surrounding the attachment hole 54c of the main body 54a is formed to be thicker than the first sidewall portion 51 and the second sidewall portion 52.
  • the flange 54b is formed so as to protrude toward the side away from the intake camshaft 12 toward the side opposite to the opening of the main body 54a (the rear side in the vehicle longitudinal direction).
  • the flange 54b has a flat mounting surface and a pair of screw holes. The fuel pump 14 comes into contact with the mounting surface of the flange 54b, and a bolt is screwed into the screw hole to fix the fuel pump 14 to the fuel pump mounting bracket 15.
  • the fastening portion 55 includes a protrusion 55 a formed so as to protrude further upward than the upper surface portion of the connection wall portion 53, and a flat surface 55 b formed flat so as to fasten the vacuum pump 23.
  • the protrusion 55a is provided with a screw hole 55c formed in the left-right direction.
  • a bolt 60 is screwed into the screw hole 55 c and fixed to the fuel pump mounting bracket 15.
  • the cylinder head cover 17 covers the upper opening 35 (see FIGS. 3 and 4) of the cylinder head 11.
  • the cylinder head cover 17 has a plurality of head attachment portions 17 a attached to the upper opening 35 and a bracket attachment portion 17 b attached to the fuel pump attachment bracket 15.
  • the head mounting portion 17a has a plurality of bolt through holes formed corresponding to the mounting bosses 31a, 32a and 33a of the rear side wall portion 31, the front side wall portion 32 and the left side wall portion 33 of the cylinder head 11. .
  • the bracket mounting portion 17b has bolt through holes formed corresponding to the screw holes 61 of the fuel pump mounting bracket 15. Bolts are inserted into the respective bolt through holes, and the cylinder head cover 17 is fixed to the cylinder head 11.
  • the low-pressure fuel supply pipe 19 connects the feed pump and the suction port 41a so that fuel in a fuel tank (not shown) mounted on the vehicle is supplied to the suction port 41a of the fuel pump 14 by the feed pump. is doing.
  • the fuel supply pipe 21 connects the discharge port 41 b of the fuel pump 14 and the delivery pipe 22, and the fuel whose pressure is increased in the pressure chamber 41 c of the fuel pump 14 is supplied to the delivery pipe 22. Supply.
  • the delivery pipe 22 is connected to a plurality of injectors that inject fuel into the combustion chambers of the respective cylinders (not shown).
  • the delivery pipe 22 is provided with a fuel pressure sensor and a relief valve so that the fuel pressure can be maintained at a reference value in order to enable continuous fuel injection.
  • the vacuum pump 23 is connected to the drive portion 12d of the intake camshaft 12 and is driven by the intake camshaft 12.
  • the vacuum pump 23 has a pump body 23 a and a connecting housing 23 b that is connected to the left side wall 33 of the cylinder head 11 and the fuel pump mounting bracket 15.
  • the vacuum pump 23 generates a negative pressure and supplies the negative pressure to an element requiring a negative pressure such as a brake booster.
  • the intake manifold 24 shown in FIG. 1 and FIG. 2 collects a flange (not shown) connected to the rear side wall portion 31 of the cylinder head 11, a manifold connected to each intake port and introducing air into the intake port, and the manifolds.
  • a collecting pipe connected to the upstream intake pipe is provided.
  • the exhaust manifold 25 shown in FIG. 1 collects a manifold (not shown) connected to the front side wall portion 32 of the cylinder head 11, a manifold through which exhaust gas is connected to each exhaust port and exhausted from the exhaust port, and the manifold. It has a collecting pipe connected to a downstream exhaust pipe and an exhaust gas purification device.
  • the fuel pump mounting boss portion 54 includes the first side wall portion 51 and the second side wall portion of the fuel pump mounting bracket 15. Since it is supported by the three wall portions 52 and the connecting wall portion 53, the effect of increasing the rigidity of the fuel pump mounting boss portion can be obtained without increasing the weight and the manufacturing cost as compared with the conventional one.
  • the fuel pump mounting boss portion 54 is located above the cylinder head 11 and opens toward the intake camshaft 12. Therefore, it is not necessary to provide the fuel pump mounting bracket 15 on the side wall portion of the cylinder head 11.
  • the mounting boss portion such as the fuel pump mounting boss portion 54 of the mounting structure of the fuel pump 14 of the present embodiment is not formed in the conventional one described in Patent Document 1, the rigidity of the mounting structure cannot be ensured. There was a problem.
  • the fuel pump mounting boss portion 54 is provided, and the thickness of the wall portion surrounding the mounting hole 54c of the main body 54a of the fuel pump mounting boss portion 54 is the first. It is formed thicker than the thickness of the side wall 51 and the second side wall 52, and the rigidity is increased. As a result, an effect that the problem of rigidity of the conventional mounting structure is solved can be obtained.
  • the fuel pump mounting boss portion 54 is supported by the three wall portions of the first side wall portion 51, the second side wall portion 52, and the connecting wall portion 53 of the fuel pump mounting bracket 15, and is positioned above the cylinder head 11, Since it opens toward the intake camshaft 12, the fuel pump mounting boss portion 54 can be disposed on the cylinder head 11. As a result, there is an effect that the degree of freedom of installation of the piping of the intake manifold 24 is increased.
  • the fuel pump is provided with the fastening portion 55 that is located above the connecting wall portion 53 and that is located on the side away from the intake camshaft 12 of the fuel pump mounting boss portion 54.
  • a vacuum pump 23 is fastened to the mounting bracket 15. For this reason, when the fuel pump mounting bracket 15 and the vacuum pump 23 are fastened, the rigidity of the mounting structure is increased.
  • the bearing support 52 h in the direction in which the bearing support 52 h of the second side wall 52 is perpendicular to the axis of the intake camshaft 12. Since the through-holes 52g and 52i are provided on both sides, the bearing support portion 52h is fastened to the both sides of the intake camshaft 12 via the cylinder head 11 and the through-holes 52g and 52i. As a result, it is possible to obtain an effect that the bearing support portion 52h is prevented from being deformed so as to fall down.
  • the pump drive cam 12c causes the first side wall 51 of the fuel pump mounting bracket 15 to be inhaled.
  • a load is applied in a direction away from the camshaft 12.
  • the connection wall portion 53 forms a triangle by the intersection point P1, the first connection point P2, and the second connection point P3 (see FIGS. 6 and 7). The applied load can be effectively transmitted from the first side wall portion 51 to the second side wall portion 52, and an effect that deformation of the first side wall portion 51 is suppressed is obtained.
  • connection wall part 53 since a part of cylinder head cover 17 can be attached to the connection wall part 53 via a sealing member, the rigidity of the connection wall part 53 is improved, and the first The effect that it suppresses that the bearing support part 52h of the 2 side wall part 52 falls so that it may fall down is acquired.
  • the fuel pump mounting bracket 15 is configured as a single structure.
  • the fuel pump mounting bracket is a single unit. You may make it comprise by structures other than one structure.
  • the fuel pump mounting bracket may be configured as an integral structure formed integrally with a cylinder head cover disposed on the upper portion of the cylinder head.
  • the fuel pump mounting bracket is formed integrally with the cylinder head cover arranged on the upper part of the cylinder head, it is not necessary to provide the fuel pump mounting bracket separately from the cylinder head cover, and the number of parts is reduced and the manufacturing is performed. The effect that the increase in cost is suppressed is acquired.
  • Cylinder head 12 Intake camshaft (camshaft) 12c Pump drive cam 13 Exhaust cam shaft (cam shaft) 14 Fuel pump 15 Fuel pump mounting bracket 17 Cylinder head cover 23 Vacuum pump 51 First side wall portion 52 Second side wall portion 52g, 52i Through hole (fastening hole) 53 Connecting wall portion 53a Seal member mounting surface 54 Fuel pump mounting boss portion 55 Fastening portion P1 Intersection P2 First connecting point P3 Second connecting point

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
PCT/JP2015/057537 2014-03-31 2015-03-13 燃料ポンプの取付構造 WO2015151767A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112015000036.4T DE112015000036B4 (de) 2014-03-31 2015-03-13 Montagestruktur für eine Kraftstoffpumpe
CN201580000168.5A CN105143657B (zh) 2014-03-31 2015-03-13 燃料泵的安装结构

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Application Number Priority Date Filing Date Title
JP2014-072028 2014-03-31
JP2014072028A JP6291973B2 (ja) 2014-03-31 2014-03-31 燃料ポンプの取付構造

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WO2015151767A1 true WO2015151767A1 (ja) 2015-10-08

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PCT/JP2015/057537 WO2015151767A1 (ja) 2014-03-31 2015-03-13 燃料ポンプの取付構造

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DE112015000036B4 (de) 2021-01-14
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CN105143657A (zh) 2015-12-09
JP6291973B2 (ja) 2018-03-14
CN105143657B (zh) 2018-05-01

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