WO2017110933A1 - Cylinder head - Google Patents

Cylinder head Download PDF

Info

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
Application number
PCT/JP2016/088222
Other languages
French (fr)
Japanese (ja)
Inventor
和明 小山
吉原　昭
裕昭 三輪
則夫 高安
厳生 ▲高▼橋
Original Assignee
三菱自動車工業株式会社
三菱自動車エンジニアリング株式会社
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 三菱自動車工業株式会社, 三菱自動車エンジニアリング株式会社 filed Critical 三菱自動車工業株式会社
Priority to JP2017558219A priority Critical patent/JP6780658B2/en
Publication of WO2017110933A1 publication Critical patent/WO2017110933A1/en

Links

Images

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.

Landscapes

  • 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

Provided is a cylinder head that is lighter, has improved rigidity, and achieves smooth flow of lubricating oil. The cylinder head (14) comprises: an injector holding section (32) that holds an injector (20) and is provided in a main body section (140); an injector fixture (40) that fixes the injector held by the injector holding section, to the cylinder head; and an attachment seat (34) provided in the main body section and having the injector fixture attached thereto. The attachment seat comprises a first leg section (70) having one end thereof coupled to a lower section of the attachment seat and the other end thereof coupled to the main body section.

Description

シリンダヘッドcylinder head
　本発明は、内燃機関のシリンダヘッドに関する。 The present invention relates to a cylinder head of an internal combustion engine.
　ディーゼルエンジンのシリンダヘッドには、吸排気バルブとインジェクタとカムシャフト等が設けられている。従来、インジェクタやカムシャフトを支持する部材を、シリンダヘッドの外周壁に連続させ、シリンダヘッドの剛性を向上させる例が知られている。 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.
特開２００９－８５０２５号公報JP 2009-85025 A
　車両の燃費を向上させるため、シリンダヘッドに軽量化が求められている。又、潤滑や冷却能力を向上させる観点から、シリンダヘッドに供給された潤滑油を円滑に流通させることが好ましい。 ¡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.
　本発明は、軽量化と剛性向上と潤滑油の円滑な流通を実現したシリンダヘッドを提供することを目的とする。 An object of the present invention is to provide a cylinder head that realizes weight reduction, rigidity improvement, and smooth circulation of lubricating oil.
　本発明は、上記の課題を解決するために、シリンダヘッドを次のように構成した。 In the present invention, in order to solve the above-described problems, the cylinder head is configured as follows.
　シリンダヘッドは、本体部と、本体部に設けられ、インジェクタを保持するインジェクタ保持部と、インジェクタ保持部に保持されたインジェクタを、シリンダヘッドに固定するインジェクタ固定具と、本体部に設けられ、インジェクタ固定具が取り付けられる取付座とを備えている。 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.
　そして、取付座は、一端が取付座の下部に連結され、他端が本体部に連結される第１脚部を備えている。 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.
　本発明のシリンダヘッドは、次の効果を奏する。軽量化と、剛性の向上と、潤滑油の円滑な流通が実現される。 The cylinder head of the present invention has the following effects. Light weight, improved rigidity, and smooth distribution of lubricating oil are realized.
図１は、本発明にかかる一実施形態のシリンダヘッドを有するエンジンを示す側面図である。FIG. 1 is a side view showing an engine having a cylinder head according to an embodiment of the present invention. 図２は、同シリンダヘッドの本体部を示す平面図である。FIG. 2 is a plan view showing a main body of the cylinder head. 図３は、同シリンダヘッドの本体部を示す斜視図である。FIG. 3 is a perspective view showing a main body of the cylinder head. 図４は、同シリンダヘッドの本体部を示す斜視図である。FIG. 4 is a perspective view showing the main body of the cylinder head. 図５は、ロッカカバーを示す斜視図である。FIG. 5 is a perspective view showing the rocker cover. 図６は、同シリンダヘッドの本体部を示す部分断面斜視図である。FIG. 6 is a partial cross-sectional perspective view showing the main body of the cylinder head. 図７は、同シリンダヘッドの本体部の一部を示す斜視図である。FIG. 7 is a perspective view showing a part of the main body of the cylinder head. 図８は、同シリンダヘッドの本体部の一部を示す斜視図である。FIG. 8 is a perspective view showing a part of the main body of the cylinder head.
　本発明にかかる一実施形態のシリンダヘッドについて説明する。図１に、実施形態のシリンダヘッドを備えたディーゼルエンジン１０を示す。ディーゼルエンジン１０は、ロッカカバー１２とシリンダヘッド１４とシリンダブロック１６とオイルパン１８とを備えている。 A cylinder head according to an embodiment of the present invention will be described. In 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.
　ディーゼルエンジン１０は、ディーゼルエンジン１０の前後方向に沿って４本のシリンダが直線状に配列された４気筒エンジンである。ディーゼルエンジン１０には、吸気系の吸気機構と排気系の排気機構とインジェクタ２０とが設けられている。ディーゼルエンジン１０の４本のシリンダは、中心が鉛直に配置されている。尚、エンジンの構成はこれに限るものではない。 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.
　以下、ディーゼルエンジン１０について、クランクプーリ１３が設けられている側を前方とし、その逆を後方とし、それを基準に左右を定める。又、重力の方向を下方、その逆を上方とする。 Hereinafter, with respect to the diesel engine 10, 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.
　シリンダブロック１６は、直列に４本のシリンダを備えている。各シリンダには、ピストンが組み入れられている。ピストンは、コネクティングロッドを介してクランクシャフトに連結している。クランクシャフトの前端に、クランクプーリ１３が設けられている。シリンダブロック１６の下部には、オイルパン１８が取り付けられている。シリンダブロック１６の上面には、シリンダヘッド１４が取り付けられている。 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.
　シリンダヘッド１４には、吸排気系それぞれのカムシャフトと、吸気バルブと、排気バルブと、ロッカーアームが設けられる。カムシャフトは、シリンダヘッド１４の軸受（厳密には本体部１４０に設けられた軸受）に回動自在に支持される。吸気バルブ及び排気バルブは、それぞれ吸気通路及び排気通路に設けられ、カムシャフトによる駆動で、吸気通路及び排気通路をそれぞれ開閉する。 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.
　シリンダヘッド１４の上面には、ロッカカバー１２が取り付けられている。ロッカカバー１２は、図５に示すように、インジェクタ２０を挿し入れるインジェクタ孔６０と、ロッカカバー取付ボルト６２を通すボルト孔６４と、インジェクタ固定具４０を通すボルト孔６８を備えている。又、ロッカカバー１２の外周には、ロッカカバー取付ボルトを通すボルト孔６６が適宜設けられている。 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.
　図２、図３にシリンダヘッド１４を示す。図２は、シリンダヘッド１４の本体部１４０を上方から示す平面図である。図３は、シリンダヘッド１４の本体部１４０を斜め上方から示す斜視図である。 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.
　シリンダヘッド１４は、底壁２２と底壁２２の周囲に設けられた外壁２４とを備えている。外壁２４は、底壁２２から立ち上げられている。シリンダヘッド１４の本体部１４０は、少なくとも底壁２２と外壁２４により形成される部分である。本体部１４０は、例えばアルミ等の金属を用いて鋳造により一体的に製造される剛体である。 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.
　底壁２２には、シリンダボルト孔座３０と、インジェクタ保持部３２と、取付座３４と、ベアリング壁３６が設けられている。底壁２２の下部には、冷却液を通過させるウォータジャケット、吸気通路、排気通路等が形成されている。 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. In the lower part of the bottom wall 22, a water jacket, an intake passage, an exhaust passage, and the like that allow the coolant to pass therethrough are formed.
　シリンダボルト孔座３０は、シリンダヘッド１４とシリンダブロック１６とを連結するシリンダボルト３８（図４参照）を通すシリンダボルト孔３１を有している。シリンダボルト孔座３０は、本体部１４０の外壁２４に沿ってほぼ等間隔に、ディーゼルエンジン１０の各シリンダの中心線を通る平面（以下、「中央面」という）の両側に対向して設けられている。シリンダボルト孔座３０は、底壁２２から若干立ち上げられ、シリンダボルト孔３１が上面に開口している。シリンダボルト孔座３０は、底壁２２に、合計１０カ所設けられている。 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.
　以下、シリンダボルト孔座３０を必要に応じて、ディーゼルエンジン１０の前方側から順次、第１シリンダボルト孔座３０ａ、第２シリンダボルト孔座３０ｂ、第３シリンダボルト孔座３０ｃ、第４シリンダボルト孔座３０ｄ、第５シリンダボルト孔座３０ｅと呼ぶ。 Hereinafter, 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.
　インジェクタ保持部３２は、ディーゼルエンジン１０の各シリンダの中央位置に対応して設けられている。インジェクタ保持部３２は、中心にインジェクタ２０を挿し入れる挿入孔３３を有している。インジェクタ保持部３２の左右両側には、ベアリング壁３６が連結されている。 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.
　以下、インジェクタ保持部３２を必要に応じて、ディーゼルエンジン１０の前方側から順次、第１インジェクタ保持部３２ａ、第２インジェクタ保持部３２ｂ、第３インジェクタ保持部３２ｃ、第４インジェクタ保持部３２ｄと呼ぶ。 Hereinafter, 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. .
　インジェクタ２０は、ロッカカバー１２に設けられたインジェクタ孔６０（図５参照）を貫通して、インジェクタ保持部３２の挿入孔３３に挿し入れられる。インジェクタ２０の外周には、インジェクタカバー６１が組み付けられる。 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.
　インジェクタ２０をインジェクタ保持部３２に挿し入れた状態を図４に示す。図４は、説明上シリンダヘッド１４にインジェクタ２０を直接固定した状態を示す図である。インジェクタ２０は、インジェクタ保持部３２に挿し入れられた状態で、インジェクタ固定具４０によりシリンダヘッド１４の本体部１４０に固定されている。 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.
　インジェクタ固定具４０は、インジェクタ２０の上部を保持する保持部４２と、取付ボルト４５とを備えている。保持部４２は、２基のインジェクタ２０を所定の間隔をあけて平行に保持する。取付ボルト４５は、保持部４２の中央に設けられている。取付ボルト４５は、取付座３４の雌ねじ４６（図２参照）に螺合される。取付座３４は、図２に示すように、２つのインジェクタ保持部３２の間に設けられている。インジェクタ固定具４０で固定されたインジェクタ２０は、先端が燃焼室に臨み、サプライポンプからの燃料を適宜シリンダ内に噴射する。 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.
　ベアリング壁３６は、その一端が外壁２４に連結し、その他端がインジェクタ保持部３２に連結している。ベアリング壁３６は、中央面に垂直な面に沿って設けられている。ベアリング壁３６の上部には、カムシャフトを支持するベアリングの下半部が設けられている。ベアリング壁３６には、図４に示すように、ベアリング上半部のベアリングキャップ６９が組み付けられ、吸気と排気それぞれのカムシャフトが支持される。 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. On the upper part of the bearing wall 36, a lower half portion of the bearing that supports the camshaft is provided. As shown in FIG. 4, 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.
　以下、ベアリング壁３６を必要に応じて、ディーゼルエンジン１０の前方側から順次、第１ベアリング壁３６ａ、第２ベアリング壁３６ｂ、第３ベアリング壁３６ｃ、第４ベアリング壁３６ｄと呼ぶ。 Hereinafter, the 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.
　次に、取付座３４について説明する。シリンダヘッド１４の本体部１４０には、第１取付座３４ａと第２取付座３４ｂとが設けられている。第１取付座３４ａは、第１インジェクタ保持部３２ａと第２インジェクタ保持部３２ｂの間に設けられ、第２取付座３４ｂは、第３インジェクタ保持部３２ｃと第４インジェクタ保持部３２ｄの間に設けられている。 Next, the mounting seat 34 will be described. 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, and the second mounting seat 34b is provided between the third injector holding portion 32c and the fourth injector holding portion 32d. It has been.
　第１取付座３４ａ及び第２取付座３４ｂは、図２に示すように、上面がシリンダヘッド１４の幅方向に長い長円形で、中心にインジェクタ固定具４０の取付ボルト４５を螺合させる雌ねじ４６が設けられている。又、第１取付座３４ａ及び第２取付座３４ｂの上面には、雌ねじ４６の左右両側に、ロッカカバー１２を固定するためのロッカカバー取付ボルト６２（図５参照）を螺合させる雌ねじ５２が設けられている。 As shown in FIG. 2, 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.
　又、第１取付座３４ａの上部は、縦壁５０を介して第１インジェクタ保持部３２ａ及び第２インジェクタ保持部３２ｂに連結されている。第２取付座３４ｂの上部は、縦壁５０を介して第３インジェクタ保持部３２ｃ及び第４インジェクタ保持部３２ｄに連結されている。 Further, the upper part of the 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.
　次に、第１取付座３４ａの下部の構造について説明する。第１取付座３４ａの下部には、図６、図７、図８に示すように、第１脚部７０と第２脚部７２と第３脚部７４が設けられている。図６は、図３に示すシリンダヘッド１４（本体部１４０）を、シリンダヘッド１４の上部中央部分を残して、シリンダヘッド１４の左右両側をＬ字状に破断した断面斜視図である。図７及び図８は、図６に示すシリンダヘッド１４の一部を拡大して示す断面斜視図である。 Next, the structure below the first mounting seat 34a will be described. As shown in 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.
　第１取付座３４ａの下部の構造は、ディーゼルエンジン１０の各シリンダの中心線を通る中央面を中心にして、基本的にほぼ左右対称に形成されているので、以下、吸気側の構造について説明する。又、第２取付座３４ｂは、第１取付座３４ａと基本的に同等の構造を有している。 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.
　第１取付座３４ａは、対向して設けられている一対の第２シリンダボルト孔座３０ｂ（図２参照）の間に設けられている。第１取付座３４ａと各第２シリンダボルト孔座３０ｂとは、シリンダヘッド１４の中央面に垂直な面に沿って、平面視で直線状に配置されている。 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.
　第１脚部７０は、図７に示すように、第１取付座３４ａの下部から、第２シリンダボルト孔座３０ｂに延びている。第１脚部７０は、第１取付座３４ａの取付ボルト雌ねじ４６を通る、中央面と垂直な面に沿って形成されている。 As shown in FIG. 7, 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.
　第２脚部７２と第３脚部７４は、第１脚部７０を中心にして、平面視で第１脚部７０の両側にほぼ対称に設けられている。第２脚部７２は、その一端が第１取付座３４ａの下部に連結し、その他端が第１ベアリング壁３６ａに連結している。第３脚部７４は、その一端が第１取付座３４ａの下部に連結し、その他端が第２ベアリング壁３６ｂに連結している。第２脚部７２及び第３脚部７４は、シリンダヘッド１４の下面に対してほぼ平行に設けられている。 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.
　又、第２脚部７２と第１ベアリング壁３６ａとの接続部の近傍には、第２シリンダボルト孔座３０ｂから延びる第４脚部７６が連結している。又、第３脚部７４と第２ベアリング壁３６ｂとの接続部の近傍には、第２シリンダボルト孔座３０ｂから延びる第５脚部７８が連結している。第４脚部７６と第５脚部７８は、中央面と平行な面内にほぼ沿って設けられている。 Further, 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.
　第１取付座３４ａは、排気側においても、上記吸気側と同様に第１脚部７０から第５脚部７８が設けられている。以上説明したように、第１取付座３４ａは、ディーゼルエンジン１０の中央面を中心とした左右両側に第１脚部７０を備え、第２シリンダボルト孔座３０ｂに支持されている。 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.
　又、第１取付座３４ａは、左右両側に設けられた第２脚部７２と第３脚部７４により、それぞれ第１ベアリング壁３６ａ及び第２ベアリング壁３６ｂに支持されている。更に、第２脚部７２の第１ベアリング壁３６ａの端部及び第３脚部７４の第２ベアリング壁３６ｂ側の端部が、第４脚部７６及び第５脚部７８により、第２シリンダボルト孔座３０ｂの下部に支持される構造となっている。 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.
　したがって、第１取付座３４ａは、複数の脚部により、シリンダヘッド１４の本体部１４０に強固に連結されている。第２シリンダボルト孔座３０ｂは、シリンダボルト３８によりシリンダブロック１６と強固に結合される個所であるので、第１取付座３４ａは、第１脚部７０等により、左右両側の第２シリンダボルト孔座３０ｂを介してシリンダブロック１６に強固に連結される。 Therefore, 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.
　第１取付座３４ａは、第１ベアリング壁３６ａと第２ベアリング壁３６ｂとに、第２脚部７２と第３脚部７４と第４脚部７６と第５脚部７８を介して網目状に連結される。したがって、第１取付座３４ａが３次元的に強固に保持される。 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.
　第１取付座３４ａの下部は、第１脚部７０、第４脚部７６、第５脚部７８が、底壁２２に対して傾斜して設けられているので各脚部の間に空間が形成されている。これによりシリンダヘッド１４の高剛性化と軽量化に加えて、シリンダヘッド１４内の潤滑油を円滑に流動させることができるようになることから、シリンダヘッド１４内の清浄及び冷却を効率的に実現できる。 In the lower part of the first mounting seat 34a, 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. As a result, in addition to increasing the rigidity and weight of the cylinder head 14, 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.
　次に、第２インジェクタ保持部３２ｂを中心にした、シリンダヘッド１４の構造について説明する。第２インジェクタ保持部３２ｂには、図８に示すように、第２ベアリング壁３６ｂが、第２インジェクタ保持部３２ｂを挟んで左右両側に設けられている。第２ベアリング壁３６ｂは、シリンダヘッド１４の中央面に対して垂直な面に沿って設けられ、第２インジェクタ保持部３２ｂと外壁２４とを連結している。 Next, the structure of the cylinder head 14 centering on the second injector holding portion 32b will be described. As shown in FIG. 8, 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.
　第２ベアリング壁３６ｂには、それぞれ吸気カムシャフトと排気カムシャフトのベアリングの下半部分が設けられている（図３参照）。第２ベアリング壁３６ｂを挟んで、第２シリンダボルト孔座３０ｂと対称の位置に第３シリンダボルト孔座３０ｃが設けられている。 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.
　第３シリンダボルト孔座３０ｃには、図２に示すように、第２シリンダボルト孔座３０ｂと同様に第１脚部７０と第４脚部７６と第５脚部７８が連結されている。又、第３シリンダボルト孔座３０ｃを中心にして、第２脚部７２と第３脚部７４がそれぞれ第２ベアリング壁３６ｂと第３ベアリング壁３６ｃに連結している。 As shown in FIG. 2, 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.
　シリンダヘッド１４の左右に対向して設けられている第３シリンダボルト孔座３０ｃの間には、梁８０が設けられている。梁８０は、第１脚部７０の上端と、第２脚部７２及び第３脚部７４の端部が連結されている部分に連結している。梁８０は、第２脚部７２及び第３脚部７４を含む平面とほぼ同じ平面内に設けられている。中央面を挟んで梁８０の左右両側には、第１脚部７０と第２脚部７２と第３脚部７４とがそれぞれ対向して設けられている。 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.
　第２インジェクタ保持部３２ｂを中心として、第２インジェクタ保持部３２ｂの周囲には、吸気側の第２ベアリング壁３６ｂから右周り方向に、第２シリンダボルト孔座３０ｂの吸気側の第３脚部７４、第１取付座３４ａ、第２シリンダボルト孔座３０ｂの排気側の第３脚部７４、排気側の第２ベアリング壁３６ｂ、第３シリンダボルト孔座３０ｃの排気側の第２脚部７２、梁８０、第３シリンダボルト孔座３０ｃの吸気側の第２脚部７２が順にほぼ八角形に連続し、環状の構造体３７bが形成されている。かかる環状の構造体３７bにより、本体部１４０の、第２インジェクタ保持部３２ｂの周囲の剛性が向上する。 Around the second injector holding portion 32b, 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.
　又、図２に示すように、本体部１４０には、第１インジェクタ保持部３２ａから第４インジェクタ保持部３２ｄまで、各インジェクタ保持部３２毎に、各インジェクタ保持部３２を囲む環状の構造体３７ａ～３７ｄが形成されている。これにより、シリンダヘッド１４の全てのシリンダにおいて、シリンダ周りの剛性が向上する。第１インジェクタ保持部３２ａでは、カムシャフトを保持する共通の軸受けの取付台３５を用いて、八角形の環状の構造体３７ａを構成している。 Further, as shown in FIG. 2, 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. In the first injector holding portion 32a, an octagonal annular structure 37a is configured by using a common bearing mount 35 for holding the camshaft.
　又、シリンダヘッド１４の本体部１４０は、各シリンダの環状の構造体３７ａ～３７ｄが、各環状の構造体３７ａ～３７ｄの一部を共通にして連結されている。これにより、シリンダヘッド１４の全体の剛性がより向上される。 Further, in the main body 140 of the cylinder head 14, 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.
　各環状の構造体３７ａ～３７ｄは、第１脚部７０と第４脚部７６と第５脚部７８を介してそれぞれのシリンダボルト孔座３０に連結される。これにより、各環状の構造体３７ａ～３７ｄは、シリンダボルト３８によりシリンダブロック１６と強固に連結され、各インジェクタ保持部３２はより強固に支持される。 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.
　尚、本発明は、上記実施形態に限るものではなく、適宜変更できる。 Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
　例えば、本実施形態においては、本体部１４０が鋳造によって製造された際には、各脚部７０～７８は本体部１４０と一体的に形成されている。したがって、各脚部７０～７８は、本体部１４０、シリンダボルト孔座３０、取付座３４に対して、一体的に連結されている。ただし、各脚部７０～７８の連結態様はこれに限られず、これらを本体部１４０とは別の部品から構成し、ボルト等によって本体部１４０に対して連結してもよい、このような構成であっても、本発明の効果は発揮され得る。ただし、鋳造による一体的な構造の方が剛性の向上、軽量化、部品点数や工数の削減には一般に有利である。 For example, in the present embodiment, when the main body 140 is manufactured by casting, 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. However, 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. However, an integral structure by casting is generally advantageous for improving rigidity, reducing weight, and reducing the number of parts and man-hours.
　１０…ディーゼルエンジン、１２…ロッカカバー、１３…クランクプーリ、１４…シリンダヘッド、１６…シリンダブロック、１８…オイルパン、２０…インジェクタ、２２…底壁、２４…外壁、３０…シリンダボルト孔座、３１…シリンダボルト孔、３２…インジェクタ保持部、３３…挿入孔、３４…取付座、３５…取付台、３６…ベアリング壁、３７…構造体、３８…シリンダボルト、４０…インジェクタ固定具、４２…保持部、４５…取付ボルト、５０…縦壁、６０…インジェクタ孔、６１…インジェクタカバー、６２…ロッカカバー取付ボルト、６４…ボルト孔、６６…ボルト孔、６８…ボルト孔、６９…ベアリングキャップ、７０…第１脚部、７２…第２脚部、７４…第３脚部、７６…第４脚部、７８…第５脚部、８０…梁。 DESCRIPTION OF SYMBOLS 10 ... Diesel engine, 12 ... Rocker cover, 13 ... Crank pulley, 14 ... Cylinder head, 16 ... Cylinder block, 18 ... Oil pan, 20 ... Injector, 22 ... Bottom wall, 24 ... Outer wall, 30 ... Cylinder bolt hole seat, DESCRIPTION OF SYMBOLS 31 ... Cylinder bolt hole, 32 ... Injector holding part, 33 ... Insertion hole, 34 ... Mounting seat, 35 ... Mounting base, 36 ... Bearing wall, 37 ... Structure, 38 ... Cylinder bolt, 40 ... Injector fixing tool, 42 ... Holding part, 45 ... mounting bolt, 50 ... vertical wall, 60 ... injector hole, 61 ... 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.

Claims (8)

  1. 　内燃機関のシリンダヘッドであって、
    　本体部と、
    　前記本体部に設けられ、インジェクタを保持するインジェクタ保持部と、
    　前記インジェクタ保持部に保持された前記インジェクタを、前記本体部に固定するインジェクタ固定具と、
    　前記本体部に設けられ、前記インジェクタ固定具が取り付けられる取付座と、
    　前記取付座の下部に一端が連結され、他端が前記本体部に連結される第１脚部と、を備えたシリンダヘッド。     A cylinder head of an internal combustion engine,
    The main body,
    An injector holding portion that is provided in the main body portion and holds the injector;
    An injector fixture for fixing the injector held by the injector holding part to the main body part;
    A mounting seat provided on the main body and to which the injector fixture is attached;
    A cylinder head comprising: 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 portion.
  2. 　前記取付座の下部に一端が連結され、他端が前記本体部に連結される、前記第１脚部に対して平面視で対称な角度で設けられる第２脚部及び第３脚部と、を備えた請求項１に記載のシリンダヘッド。 A second leg part and a third leg part provided at an angle symmetrical in a plan view with respect to the first leg part, one end of which is connected to the lower part of the mounting seat and the other end is connected to the main body part; A cylinder head according to claim 1, comprising:
  3. 　シリンダブロックに螺合するシリンダボルトを通すシリンダボルト孔座が、前記取付座の側方に設けられ、
    　前記第１脚部の他端は、前記シリンダボルト孔座に連結されている請求項２に記載のシリンダヘッド。     A cylinder bolt hole seat for passing a cylinder bolt screwed into the cylinder block is provided on the side of the mounting seat,
    The cylinder head according to claim 2, wherein the other end of the first leg is connected to the cylinder bolt hole seat.
  4. 　カムシャフトを支持するベアリング壁が、前記インジェクタ保持部と前記本体部との間に設けられ、
    　前記第２脚部及び前記第３脚部の他端が、それぞれ前記ベアリング壁と前記本体部との連結部に連結されている請求項３に記載のシリンダヘッド。     A bearing wall that supports the camshaft is provided between the injector holding portion and the main body portion,
    The cylinder head according to claim 3, wherein the other ends of the second leg portion and the third leg portion are respectively connected to a connecting portion between the bearing wall and the main body portion.
  5. 　前記第２脚部と前記ベアリング壁との連結部に、前記シリンダボルト孔座から延びる第４脚部が連結され、
    　前記第３脚部と前記ベアリング壁との連結部に、前記シリンダボルト孔座から延びる第５脚部が連結されている請求項４に記載のシリンダヘッド。     A fourth leg portion extending from the cylinder bolt hole seat is connected to a connecting portion between the second leg portion and the bearing wall,
    The cylinder head according to claim 4, wherein a fifth leg portion extending from the cylinder bolt hole seat is connected to a connecting portion between the third leg portion and the bearing wall.
  6. 　前記取付座は、隣接して設けられた前記インジェクタ保持部間に設けられ、
    　前記取付座と前記インジェクタ保持部が縦壁で連結されている請求項５に記載のシリンダヘッド。     The mounting seat is provided between the injector holding portions provided adjacent to each other,
    The cylinder head according to claim 5, wherein the mounting seat and the injector holding portion are connected by a vertical wall.
  7. 　前記インジェクタ固定具は、一対のインジェクタを保持する保持部と、前記保持部の中央に設けられた取付ボルトと、を備え、
    　前記取付座は、前記取付ボルトが螺合される雌ねじを有している請求項６に記載のシリンダヘッド。     The injector fixture includes a holding portion that holds a pair of injectors, and a mounting bolt that is provided at the center of the holding portion,
    The cylinder head according to claim 6, wherein the mounting seat has a female screw into which the mounting bolt is screwed.
  8. 　前記取付座は、ロッカカバーを固定する取付ボルトが螺合される雌ねじを有している請求項７に記載のシリンダヘッド。 The cylinder head according to claim 7, wherein the mounting seat has a female screw into which a mounting bolt for fixing the rocker cover is screwed.
PCT/JP2016/088222 2015-12-25 2016-12-21 Cylinder head WO2017110933A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017558219A JP6780658B2 (en) 2015-12-25 2016-12-21 cylinder head

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015255075 2015-12-25
JP2015-255075 2015-12-25

Publications (1)

Publication Number Publication Date
WO2017110933A1 true WO2017110933A1 (en) 2017-06-29

Family

ID=59090880

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/088222 WO2017110933A1 (en) 2015-12-25 2016-12-21 Cylinder head

Country Status (2)

Country Link
JP (1) JP6780658B2 (en)
WO (1) WO2017110933A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179152U (en) * 1988-06-09 1989-12-22
JPH102266A (en) * 1996-06-17 1998-01-06 Toyota Motor Corp Mounting structure for nozzle clamp
JPH109092A (en) * 1996-06-24 1998-01-13 Nissan Motor Co Ltd Fixture for injection valve used in dohc type internal combustion engine
JP2000230456A (en) * 1999-02-09 2000-08-22 Toyota Motor Corp Cylinder head of internal combustion engine
JP2003269244A (en) * 2002-03-12 2003-09-25 Honda Motor Co Ltd Internal-combustion engine with fuel injection valve
JP2005180277A (en) * 2003-12-18 2005-07-07 Mazda Motor Corp Cylinder head section structure for overhead camshaft type direct injection diesel engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179152U (en) * 1988-06-09 1989-12-22
JPH102266A (en) * 1996-06-17 1998-01-06 Toyota Motor Corp Mounting structure for nozzle clamp
JPH109092A (en) * 1996-06-24 1998-01-13 Nissan Motor Co Ltd Fixture for injection valve used in dohc type internal combustion engine
JP2000230456A (en) * 1999-02-09 2000-08-22 Toyota Motor Corp Cylinder head of internal combustion engine
JP2003269244A (en) * 2002-03-12 2003-09-25 Honda Motor Co Ltd Internal-combustion engine with fuel injection valve
JP2005180277A (en) * 2003-12-18 2005-07-07 Mazda Motor Corp Cylinder head section structure for overhead camshaft type direct injection diesel engine

Also Published As

Publication number Publication date
JPWO2017110933A1 (en) 2018-10-18
JP6780658B2 (en) 2020-11-04

Similar Documents

Publication Publication Date Title
US20110073074A1 (en) Engine assembly including cam cover mounted fuel rail
JP2008019842A (en) Fuel pump supporting structure of internal combustion engine and pump supporting bracket used in supporting structure
US8042506B2 (en) Cylinder head
JPH0754090B2 (en) Cylinder head cooling structure for motorcycle engine
WO2017110933A1 (en) Cylinder head
WO2017110934A1 (en) Cylinder head
JPS6170123A (en) Cooling construction of cylinder head
JP2009215922A5 (en)
JP6668748B2 (en) Rocker cover
JP2015094238A (en) Holder structure of internal combustion engine
WO2016111297A1 (en) Cylinder head structure
JP2011256835A (en) Cylinder head structure of internal combustion engine
US20080087246A1 (en) Engine and motorcycle
US10598122B2 (en) Cylinder head cooling structure
JP5331588B2 (en) Crankcase for internal combustion engine
JP2016089661A (en) Engine and motorcycle with the same
US20030089321A1 (en) Crankcase for an internal combustion engine, especially for a boxer engine
JP2006138226A (en) Internal combustion engine
JP5584591B2 (en) V-shaped engine
JP2013113158A (en) Head cover structure of internal combustion engine
JPH0575883B2 (en)
JP2010249060A (en) Cam housing and internal combustion engine
JP2000045740A (en) Oil supplying device for internal combustion engine
JP7025874B2 (en) EGR device
CN205135824U (en) Cylinder end of motorcycle internal -combustion engine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16878820

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017558219

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16878820

Country of ref document: EP

Kind code of ref document: A1