WO2017110933A1 - Culasse - Google Patents
Culasse Download PDFInfo
- Publication number
- WO2017110933A1 WO2017110933A1 PCT/JP2016/088222 JP2016088222W WO2017110933A1 WO 2017110933 A1 WO2017110933 A1 WO 2017110933A1 JP 2016088222 W JP2016088222 W JP 2016088222W WO 2017110933 A1 WO2017110933 A1 WO 2017110933A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injector
- cylinder head
- leg
- cylinder
- main body
- Prior art date
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Classifications
-
- 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
-
- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
Definitions
- the present invention relates to a cylinder head of an internal combustion engine.
- the cylinder head of a diesel engine is provided with intake / exhaust valves, injectors, camshafts, and the like. 2. Description of the Related Art Conventionally, there has been known an example in which a member that supports an injector or a cam shaft is made continuous with an outer peripheral wall of a cylinder head to improve the rigidity of the cylinder head.
- ⁇ Cylinder heads are required to be lighter in order to improve vehicle fuel efficiency. Further, from the viewpoint of improving lubrication and cooling capacity, it is preferable to smoothly distribute the lubricating oil supplied to the cylinder head.
- An object of the present invention is to provide a cylinder head that realizes weight reduction, rigidity improvement, and smooth circulation of lubricating oil.
- the cylinder head is configured as follows.
- the cylinder head is provided in the main body, the injector holding portion that is provided in the main body and holds the injector, the injector fixture that fixes the injector held in the injector holding portion to the cylinder head, and the injector And a mounting seat to which the fixture is attached.
- the mounting seat includes a first leg portion having one end connected to the lower portion of the mounting seat and the other end connected to the main body.
- the cylinder head of the present invention has the following effects. Light weight, improved rigidity, and smooth distribution of lubricating oil are realized.
- FIG. 1 is a side view showing an engine having a cylinder head according to an embodiment of the present invention.
- FIG. 2 is a plan view showing a main body of the cylinder head.
- FIG. 3 is a perspective view showing a main body of the cylinder head.
- FIG. 4 is a perspective view showing the main body of the cylinder head.
- FIG. 5 is a perspective view showing the rocker cover.
- FIG. 6 is a partial cross-sectional perspective view showing the main body of the cylinder head.
- FIG. 7 is a perspective view showing a part of the main body of the cylinder head.
- FIG. 8 is a perspective view showing a part of the main body of the cylinder head.
- FIG. 1 the diesel engine 10 provided with the cylinder head of embodiment is shown.
- the diesel engine 10 includes a rocker cover 12, a cylinder head 14, a cylinder block 16, and an oil pan 18.
- the diesel engine 10 is a four-cylinder engine in which four cylinders are linearly arranged along the front-rear direction of the diesel engine 10.
- the diesel engine 10 is provided with an intake system intake mechanism, an exhaust system exhaust mechanism, and an injector 20.
- the four cylinders of the diesel engine 10 are vertically arranged at the center.
- the configuration of the engine is not limited to this.
- the side on which the crank pulley 13 is provided is defined as the front, and the opposite is defined as the rear, and the left and right are determined based on this. Moreover, the direction of gravity is set to the lower side, and the opposite is set to the upper side.
- the cylinder block 16 includes four cylinders in series. Each cylinder incorporates a piston. The piston is connected to the crankshaft via a connecting rod. A crank pulley 13 is provided at the front end of the crankshaft. An oil pan 18 is attached to the lower part of the cylinder block 16. A cylinder head 14 is attached to the upper surface of the cylinder block 16.
- the cylinder head 14 is provided with a camshaft, an intake valve, an exhaust valve, and a rocker arm for each intake and exhaust system.
- the camshaft is rotatably supported by a bearing of the cylinder head 14 (strictly speaking, a bearing provided in the main body 140).
- the intake valve and the exhaust valve are provided in the intake passage and the exhaust passage, respectively, and open and close the intake passage and the exhaust passage by driving with a camshaft.
- the rocker cover 12 is attached to the upper surface of the cylinder head 14. As shown in FIG. 5, the rocker cover 12 includes an injector hole 60 into which the injector 20 is inserted, a bolt hole 64 through which the rocker cover mounting bolt 62 is passed, and a bolt hole 68 through which the injector fixture 40 is passed. Further, a bolt hole 66 through which the rocker cover mounting bolt is passed is appropriately provided on the outer periphery of the rocker cover 12.
- FIG. 2 and 3 show the cylinder head 14.
- FIG. 2 is a plan view showing the main body 140 of the cylinder head 14 from above.
- FIG. 3 is a perspective view showing the main body 140 of the cylinder head 14 from obliquely above.
- the cylinder head 14 includes a bottom wall 22 and an outer wall 24 provided around the bottom wall 22.
- the outer wall 24 is raised from the bottom wall 22.
- the main body 140 of the cylinder head 14 is a part formed by at least the bottom wall 22 and the outer wall 24.
- the main body 140 is a rigid body that is integrally manufactured by casting using a metal such as aluminum.
- the bottom wall 22 is provided with a cylinder bolt hole seat 30, an injector holding portion 32, a mounting seat 34, and a bearing wall 36.
- a water jacket, an intake passage, an exhaust passage, and the like that allow the coolant to pass therethrough are formed.
- the cylinder bolt hole seat 30 has a cylinder bolt hole 31 through which a cylinder bolt 38 (see FIG. 4) for connecting the cylinder head 14 and the cylinder block 16 is passed.
- the cylinder bolt hole seats 30 are provided at substantially equal intervals along the outer wall 24 of the main body 140 so as to face both sides of a plane passing through the center line of each cylinder of the diesel engine 10 (hereinafter referred to as “center plane”). ing.
- the cylinder bolt hole seat 30 is slightly raised from the bottom wall 22, and the cylinder bolt hole 31 is opened on the upper surface.
- a total of ten cylinder bolt hole seats 30 are provided on the bottom wall 22.
- the cylinder bolt hole seats 30 are sequentially arranged from the front side of the diesel engine 10 as necessary, in order from the first cylinder bolt hole seat 30a, the second cylinder bolt hole seat 30b, the third cylinder bolt hole seat 30c, and the fourth cylinder bolt. These are called the hole seat 30d and the fifth cylinder bolt hole seat 30e.
- the injector holding part 32 is provided corresponding to the center position of each cylinder of the diesel engine 10.
- the injector holding part 32 has an insertion hole 33 into which the injector 20 is inserted at the center.
- Bearing walls 36 are connected to the left and right sides of the injector holding portion 32.
- the injector holding part 32 is referred to as a first injector holding part 32a, a second injector holding part 32b, a third injector holding part 32c, and a fourth injector holding part 32d sequentially from the front side of the diesel engine 10 as necessary. .
- the injector 20 passes through an injector hole 60 (see FIG. 5) provided in the rocker cover 12 and is inserted into the insertion hole 33 of the injector holding portion 32.
- An injector cover 61 is assembled on the outer periphery of the injector 20.
- FIG. 4 shows a state where the injector 20 is inserted into the injector holding portion 32.
- FIG. 4 is a view showing a state in which the injector 20 is directly fixed to the cylinder head 14 for explanation.
- the injector 20 is fixed to the main body 140 of the cylinder head 14 by the injector fixture 40 while being inserted into the injector holding portion 32.
- the injector fixture 40 includes a holding portion 42 that holds the upper portion of the injector 20 and a mounting bolt 45.
- the holding unit 42 holds the two injectors 20 in parallel at a predetermined interval.
- the mounting bolt 45 is provided at the center of the holding portion 42.
- the mounting bolt 45 is screwed into a female screw 46 (see FIG. 2) of the mounting seat 34. As shown in FIG. 2, the mounting seat 34 is provided between the two injector holding portions 32.
- the injector 20 fixed by the injector fixture 40 has a tip that faces the combustion chamber, and appropriately injects fuel from the supply pump into the cylinder.
- the bearing wall 36 has one end connected to the outer wall 24 and the other end connected to the injector holding portion 32.
- the bearing wall 36 is provided along a plane perpendicular to the central plane.
- a lower half portion of the bearing that supports the camshaft is provided on the upper part of the bearing wall 36.
- a bearing cap 69 in the upper half of the bearing is assembled to the bearing wall 36 to support the intake and exhaust camshafts.
- bearing walls 36 will be referred to as a first bearing wall 36a, a second bearing wall 36b, a third bearing wall 36c, and a fourth bearing wall 36d in order from the front side of the diesel engine 10 as necessary.
- the main body 140 of the cylinder head 14 is provided with a first mounting seat 34a and a second mounting seat 34b.
- the first mounting seat 34a is provided between the first injector holding portion 32a and the second injector holding portion 32b
- the second mounting seat 34b is provided between the third injector holding portion 32c and the fourth injector holding portion 32d. It has been.
- the first mounting seat 34 a and the second mounting seat 34 b are oval with the upper surface elongated in the width direction of the cylinder head 14, and are internally threaded 46 for screwing the mounting bolt 45 of the injector fixture 40 at the center. Is provided. Further, on the upper surfaces of the first mounting seat 34a and the second mounting seat 34b, female screws 52 for screwing rocker cover mounting bolts 62 (see FIG. 5) for fixing the rocker cover 12 to the left and right sides of the female screw 46 are provided. Is provided.
- first mounting seat 34a is connected to the first injector holding part 32a and the second injector holding part 32b via the vertical wall 50.
- the upper part of the second mounting seat 34b is connected to the third injector holding part 32c and the fourth injector holding part 32d via the vertical wall 50.
- FIGS. 6, 7, and 8 a first leg portion 70, a second leg portion 72, and a third leg portion 74 are provided below the first mounting seat 34 a.
- 6 is a cross-sectional perspective view of the cylinder head 14 (main body portion 140) shown in FIG. 3 with the left and right sides of the cylinder head 14 broken into L-shapes, leaving the upper center portion of the cylinder head 14.
- 7 and 8 are enlarged cross-sectional perspective views showing a part of the cylinder head 14 shown in FIG.
- the structure of the lower part of the first mounting seat 34a is basically symmetrical with respect to the center plane passing through the center line of each cylinder of the diesel engine 10, so that the structure on the intake side will be described below. To do.
- the second mounting seat 34b has basically the same structure as the first mounting seat 34a.
- the first mounting seat 34a is provided between a pair of second cylinder bolt hole seats 30b (see FIG. 2) provided to face each other.
- the first mounting seats 34a and the respective second cylinder bolt hole seats 30b are linearly arranged in a plan view along a plane perpendicular to the center surface of the cylinder head 14.
- the first leg 70 extends from the lower portion of the first mounting seat 34a to the second cylinder bolt hole seat 30b.
- the first leg portion 70 is formed along a plane that passes through the mounting bolt female thread 46 of the first mounting seat 34a and is perpendicular to the center plane.
- the second leg portion 72 and the third leg portion 74 are provided substantially symmetrically on both sides of the first leg portion 70 in plan view with the first leg portion 70 as the center.
- the second leg 72 has one end connected to the lower portion of the first mounting seat 34a and the other end connected to the first bearing wall 36a.
- the third leg 74 has one end connected to the lower portion of the first mounting seat 34a and the other end connected to the second bearing wall 36b.
- the second leg portion 72 and the third leg portion 74 are provided substantially parallel to the lower surface of the cylinder head 14.
- a fourth leg 76 extending from the second cylinder bolt hole seat 30b is connected in the vicinity of the connecting portion between the second leg 72 and the first bearing wall 36a.
- a fifth leg 78 extending from the second cylinder bolt hole seat 30b is connected to the vicinity of the connecting portion between the third leg 74 and the second bearing wall 36b.
- the fourth leg portion 76 and the fifth leg portion 78 are provided substantially along a plane parallel to the central plane.
- the first mounting seat 34a is provided with the first leg portion 70 to the fifth leg portion 78 on the exhaust side as well as the intake side. As described above, the first mounting seat 34a includes the first leg portions 70 on both the left and right sides centering on the central surface of the diesel engine 10, and is supported by the second cylinder bolt hole seat 30b.
- the first mounting seat 34a is supported on the first bearing wall 36a and the second bearing wall 36b by the second leg portion 72 and the third leg portion 74 provided on the left and right sides, respectively. Further, the end of the first bearing wall 36 a of the second leg 72 and the end of the third leg 74 on the second bearing wall 36 b side are connected to the second cylinder by the fourth leg 76 and the fifth leg 78. The structure is supported by the lower portion of the bolt hole seat 30b.
- the first mounting seat 34a is firmly connected to the main body 140 of the cylinder head 14 by a plurality of legs. Since the second cylinder bolt hole seat 30b is a portion that is firmly coupled to the cylinder block 16 by the cylinder bolt 38, the first mounting seat 34a is connected to the left and right second cylinder bolt holes by the first leg portion 70 and the like. It is firmly connected to the cylinder block 16 via the seat 30b.
- the first mounting seat 34a is meshed with the first bearing wall 36a and the second bearing wall 36b via the second leg 72, the third leg 74, the fourth leg 76, and the fifth leg 78. Connected. Accordingly, the first mounting seat 34a is firmly held in three dimensions.
- the first leg part 70, the fourth leg part 76, and the fifth leg part 78 are provided inclined with respect to the bottom wall 22, so that there is a space between the leg parts. Is formed.
- the lubricating oil in the cylinder head 14 can be made to flow smoothly, so that the cleaning and cooling in the cylinder head 14 can be efficiently realized. it can.
- the second injector holding portion 32b is provided with second bearing walls 36b on both the left and right sides with the second injector holding portion 32b interposed therebetween.
- the second bearing wall 36 b is provided along a plane perpendicular to the center surface of the cylinder head 14 and connects the second injector holding portion 32 b and the outer wall 24.
- the second bearing wall 36b is provided with lower half portions of the intake camshaft and exhaust camshaft bearings (see FIG. 3).
- a third cylinder bolt hole seat 30c is provided at a position symmetrical to the second cylinder bolt hole seat 30b across the second bearing wall 36b.
- a first leg portion 70, a fourth leg portion 76, and a fifth leg portion 78 are connected to the third cylinder bolt hole seat 30c in the same manner as the second cylinder bolt hole seat 30b.
- the second leg 72 and the third leg 74 are connected to the second bearing wall 36b and the third bearing wall 36c, respectively, around the third cylinder bolt hole seat 30c.
- a beam 80 is provided between the third cylinder bolt hole seats 30c provided facing the left and right sides of the cylinder head 14.
- the beam 80 is connected to a portion where the upper end of the first leg 70 and the ends of the second leg 72 and the third leg 74 are connected.
- the beam 80 is provided in substantially the same plane as the plane including the second leg portion 72 and the third leg portion 74.
- a first leg portion 70, a second leg portion 72, and a third leg portion 74 are provided opposite to each other on the left and right sides of the beam 80 with the center plane interposed therebetween.
- the third leg portion on the intake side of the second cylinder bolt hole seat 30b is provided around the second injector holding portion 32b in the clockwise direction from the second bearing wall 36b on the intake side. 74, the first mounting seat 34a, the third leg portion 74 on the exhaust side of the second cylinder bolt hole seat 30b, the second bearing wall 36b on the exhaust side, and the second leg portion 72 on the exhaust side of the third cylinder bolt hole seat 30c.
- the beam 80 and the second leg portion 72 on the intake side of the third cylinder bolt hole seat 30c are successively connected in an approximately octagonal shape to form an annular structure 37b.
- the annular structure 37b improves the rigidity of the main body 140 around the second injector holding portion 32b.
- the main body 140 includes an annular structure 37a surrounding each injector holding part 32 for each injector holding part 32 from the first injector holding part 32a to the fourth injector holding part 32d. To 37d are formed. Thereby, the rigidity around the cylinder is improved in all the cylinders of the cylinder head 14.
- an octagonal annular structure 37a is configured by using a common bearing mount 35 for holding the camshaft.
- the annular structures 37a to 37d of the respective cylinders are connected in common with a part of each of the annular structures 37a to 37d. As a result, the overall rigidity of the cylinder head 14 is further improved.
- the annular structures 37a to 37d are connected to the respective cylinder bolt hole seats 30 through the first leg part 70, the fourth leg part 76, and the fifth leg part 78. As a result, the annular structures 37a to 37d are firmly connected to the cylinder block 16 by the cylinder bolts 38, and the injector holding portions 32 are more firmly supported.
- the leg portions 70 to 78 are formed integrally with the main body 140. Accordingly, the leg portions 70 to 78 are integrally connected to the main body portion 140, the cylinder bolt hole seat 30, and the mounting seat.
- the connection mode of the leg portions 70 to 78 is not limited to this, and the leg portions 70 to 78 may be configured from parts different from the main body portion 140 and connected to the main body portion 140 by bolts or the like. Even so, the effects of the present invention can be exhibited.
- an integral structure by casting is generally advantageous for improving rigidity, reducing weight, and reducing the number of parts and man-hours.
- injector cover 62 ... rocker cover mounting bolt, 64 ... bolt hole, 66 ... bolt hole, 68 ... bolt hole, 69 ... bearing cap, 70 ... 1st leg, 72 ... 2nd leg, 74 ... 3rd leg, 76 ... 4th leg, 78 ... 5th leg, 80 ... Beam.
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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)
Abstract
L'invention concerne une culasse ayant un poids réduit, présentant une rigidité accrue et permettant d'obtenir un écoulement régulier de l'huile lubrifiante. Cette culasse (14) comprend : une section de retenue d'injecteur (32) qui maintient un injecteur (20) et qui est ménagée dans une section de corps principal (140) ; une partie de montage d'injecteur (40) au moyen de laquelle l'injecteur, maintenu par la section de retenue d'injecteur, est monté sur la culasse ; et un siège de fixation (34) ménagé dans la section de corps principal et sur lequel est fixée la partie de montage d'injecteur. Le siège de fixation comprend une première section de pied (70) dont une extrémité est reliée à une section inférieure du siège de fixation et l'autre extrémité est reliée à la section de corps principal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017558219A JP6780658B2 (ja) | 2015-12-25 | 2016-12-21 | シリンダヘッド |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015-255075 | 2015-12-25 | ||
JP2015255075 | 2015-12-25 |
Publications (1)
Publication Number | Publication Date |
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WO2017110933A1 true WO2017110933A1 (fr) | 2017-06-29 |
Family
ID=59090880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/088222 WO2017110933A1 (fr) | 2015-12-25 | 2016-12-21 | Culasse |
Country Status (2)
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JP (1) | JP6780658B2 (fr) |
WO (1) | WO2017110933A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01179152U (fr) * | 1988-06-09 | 1989-12-22 | ||
JPH102266A (ja) * | 1996-06-17 | 1998-01-06 | Toyota Motor Corp | ノズルクランプの取付構造 |
JPH109092A (ja) * | 1996-06-24 | 1998-01-13 | Nissan Motor Co Ltd | Dohc式内燃機関用噴射弁の固定具 |
JP2000230456A (ja) * | 1999-02-09 | 2000-08-22 | Toyota Motor Corp | 内燃機関のシリンダヘッド |
JP2003269244A (ja) * | 2002-03-12 | 2003-09-25 | Honda Motor Co Ltd | 燃料噴射弁を備える内燃機関 |
JP2005180277A (ja) * | 2003-12-18 | 2005-07-07 | Mazda Motor Corp | オーバーヘッドカムシャフト式直噴ディーゼルエンジンのシリンダヘッド部構造 |
-
2016
- 2016-12-21 WO PCT/JP2016/088222 patent/WO2017110933A1/fr active Application Filing
- 2016-12-21 JP JP2017558219A patent/JP6780658B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01179152U (fr) * | 1988-06-09 | 1989-12-22 | ||
JPH102266A (ja) * | 1996-06-17 | 1998-01-06 | Toyota Motor Corp | ノズルクランプの取付構造 |
JPH109092A (ja) * | 1996-06-24 | 1998-01-13 | Nissan Motor Co Ltd | Dohc式内燃機関用噴射弁の固定具 |
JP2000230456A (ja) * | 1999-02-09 | 2000-08-22 | Toyota Motor Corp | 内燃機関のシリンダヘッド |
JP2003269244A (ja) * | 2002-03-12 | 2003-09-25 | Honda Motor Co Ltd | 燃料噴射弁を備える内燃機関 |
JP2005180277A (ja) * | 2003-12-18 | 2005-07-07 | Mazda Motor Corp | オーバーヘッドカムシャフト式直噴ディーゼルエンジンのシリンダヘッド部構造 |
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Publication number | Publication date |
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JP6780658B2 (ja) | 2020-11-04 |
JPWO2017110933A1 (ja) | 2018-10-18 |
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