JP2017048734A - cylinder head - Google Patents

cylinder head Download PDF

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Publication number
JP2017048734A
JP2017048734A JP2015173080A JP2015173080A JP2017048734A JP 2017048734 A JP2017048734 A JP 2017048734A JP 2015173080 A JP2015173080 A JP 2015173080A JP 2015173080 A JP2015173080 A JP 2015173080A JP 2017048734 A JP2017048734 A JP 2017048734A
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Japan
Prior art keywords
cylinder head
flow path
intake
lash adjuster
oil
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JP2015173080A
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Japanese (ja)
Inventor
綱記 早崎
Tsunaki HAYASAKI
綱記 早崎
淳一 和田
Junichi Wada
淳一 和田
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Isuzu Motors Ltd
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Isuzu Motors Ltd
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Priority to JP2015173080A priority Critical patent/JP2017048734A/en
Priority to PCT/JP2016/075161 priority patent/WO2017038748A1/en
Publication of JP2017048734A publication Critical patent/JP2017048734A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • 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

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of veining caused by damage to a core during casting.SOLUTION: A cylinder head 1 in which a plurality of boss parts 22 and 23 are adjacently arranged comprises: oil passages 36 and 39 formed between the plurality of adjacent boss parts 22 and 23; and notch parts 50 and 60 formed by at least partially notching the boss parts 22 and 23 to expand passage widths of the oil passages 36 and 39.SELECTED DRAWING: Figure 2

Description

本発明は、シリンダヘッドに関し、特に、複数のボス部が隣接して配設されたシリンダヘッドに関する。   The present invention relates to a cylinder head, and more particularly to a cylinder head in which a plurality of boss portions are disposed adjacent to each other.

一般的に、エンジンのシリンダブロック上部に組み付けられるシリンダヘッドは、ラッシュアジャスタやカムジャーナル等にオイルを供給するための複数のオイル流路が形成された複雑な形状になっている。   Generally, a cylinder head assembled on an upper part of a cylinder block of an engine has a complicated shape in which a plurality of oil passages for supplying oil to a lash adjuster, a cam journal, and the like are formed.

例えば、特許文献１には、シリンダヘッドにラッシュアジャスタを収容する収容部を設けると共に、当該収容部とラッシュアジャスタの外壁に設けられた貫通孔とをオイル流路で接続し、ラッシュアジャスタを収容部に挿入する際には、空気がオイル流路を介して抜けるようにした構造が開示されている。   For example, in Patent Document 1, a cylinder head is provided with an accommodating portion that accommodates a lash adjuster, and the accommodating portion and a through hole provided in an outer wall of the lash adjuster are connected by an oil flow path, and the lash adjuster is accommodated. A structure is disclosed in which air is allowed to escape through the oil flow path when inserted into the casing.

特開２０１０−２７５９６０号公報JP 2010-275960 A

一般的に、エンジンのシリンダヘッドは、鋳砂等で形成された中子を利用してアルミニウム合金等の金属を鋳造することで製造される。特に、エンジンのダウンサイジングを行う場合には、シリンダヘッドに複雑且つ細密なオイル流路を形成する必要がある。このような細密なオイル流路構造を備えたシリンダヘッドにおいては、鋳造時の高熱で中子が熱膨張により破損すると、オイル通路に段差が生じたり、或は、破損した部分にアルミニウム合金等が流れ込んでオイル流路が閉塞される等の所謂ベイニングを引き起こす課題がある。   Generally, a cylinder head of an engine is manufactured by casting a metal such as an aluminum alloy using a core formed of casting sand or the like. In particular, when downsizing the engine, it is necessary to form a complicated and fine oil flow path in the cylinder head. In a cylinder head having such a fine oil flow path structure, if the core is damaged due to thermal expansion due to high heat during casting, a step is formed in the oil passage, or an aluminum alloy or the like is formed in the damaged part. There is a problem that causes so-called baining, such as flowing in and closing the oil flow path.

開示のシリンダヘッドは、鋳造時の中子の破損によるベイニングの発生を効果的に防止することを目的とする。   An object of the disclosed cylinder head is to effectively prevent the occurrence of baining due to breakage of the core during casting.

開示のシリンダヘッドは、複数のボス部が隣接して配設されたシリンダヘッドであって、隣接する前記複数のボス部間に形成されたオイル流路と、前記ボス部の少なくとも一部を切り欠いて形成されて、前記オイル流路の流路幅を拡張する切り欠き部と、を備える。   The disclosed cylinder head is a cylinder head in which a plurality of boss portions are disposed adjacent to each other, and an oil flow path formed between the plurality of adjacent boss portions and at least a part of the boss portions are cut. A notch that is formed in a notch and extends the width of the oil passage.

前記オイル流路は、前記複数のボス部間の所定位置で流路幅が最も狭く形成され、前記切り欠き部は、前記オイル流路の流路幅が最も狭くなる部分に形成されることが好ましい。   The oil channel may be formed with a narrowest channel width at a predetermined position between the plurality of boss portions, and the notch may be formed in a portion where the channel width of the oil channel is the narrowest. preferable.

前記複数のボス部が、ラッシュアジャスタを収容する収容部が凹設されたラッシュアジャスタボス部であり、前記切り欠き部が、前記ラッシュアジャスタボス部内に形成されて、前記収容部と前記オイル流路とを連通させる連通流路であってもよい。   The plurality of boss portions are lash adjuster boss portions in which a housing portion for housing a lash adjuster is recessed, and the cutout portion is formed in the lash adjuster boss portion, and the housing portion and the oil flow path It may be a communication channel that communicates with each other.

前記連通流路が、前記収容部の底部から分岐して形成されて、前記ラッシュアジャスタを前記収容部に挿入する際に当該収容部内の空気を外部に逃がす空気抜き通路として機能するものでもよい。   The communication flow path may be formed by branching from a bottom portion of the housing portion, and function as an air vent passage for releasing the air in the housing portion to the outside when the lash adjuster is inserted into the housing portion.

前記複数のボス部が前記エンジンの長手方向に直列に配置され、前記オイル流路が前記複数のボス部間を前記エンジンの短手方向に延設され、前記連通流路が前記エンジンの長手方向に延設されてもよい。   The plurality of boss portions are arranged in series in the longitudinal direction of the engine, the oil passage extends between the plurality of boss portions in the short direction of the engine, and the communication passage is in the longitudinal direction of the engine. It may be extended.

開示のシリンダヘッドによれば、鋳造時の中子の破損によるベイニングの発生を効果的に防止することができる。   According to the disclosed cylinder head, it is possible to effectively prevent the occurrence of baining due to breakage of the core during casting.

本発明の一実施形態に係るシリンダヘッドを示す模式的な縦断面図である。It is a typical longitudinal section showing a cylinder head concerning one embodiment of the present invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明の一実施形態に係るシリンダヘッドの要部を示す模式的な縦断面図である。It is a typical longitudinal section showing the important section of a cylinder head concerning one embodiment of the present invention.

以下、添付図面に基づいて、本発明の一実施形態に係るシリンダヘッドを説明する。同一の部品には同一の符号を付してあり、それらの名称および機能も同じである。したがって、それらについての詳細な説明は繰返さない。   Hereinafter, based on an accompanying drawing, a cylinder head concerning one embodiment of the present invention is explained. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

図１は、本発明の一実施形態に係るシリンダヘッドを示す模式的な縦断面図である。本実施形態のシリンダヘッド１は、好ましくは、複数の気筒がエンジンの長手方向（クランク軸方向）に直列に配置され、各気筒に２本の吸気バルブ１１（１本は図示省略）及び、２本の排気バルブ１２（１本は図示省略）が設けられた４バルブタイプの多気筒直列エンジンに適用される。   FIG. 1 is a schematic longitudinal sectional view showing a cylinder head according to an embodiment of the present invention. In the cylinder head 1 of the present embodiment, preferably, a plurality of cylinders are arranged in series in the longitudinal direction (crankshaft direction) of the engine, and each cylinder has two intake valves 11 (one is not shown) and 2 The present invention is applied to a four-valve type multi-cylinder in-line engine provided with one exhaust valve 12 (one is not shown).

なお、図１中において、符号１１Ａは吸気ポート、符号１２Ａは排気ポート、符号１３は吸気側ラッシュアジャスタ、符号１４は排気側ラッシュアジャスタ、符号１５は吸気側カムシャフト、符号１６は排気側カムシャフト、符号１７は吸気側ロッカーアーム、符号１８は排気側ロッカーアーム、符号３０は吸気バルブスプリング座、符号３１は排気バルブスプリング座をそれぞれ示している。   In FIG. 1, reference numeral 11A is an intake port, reference numeral 12A is an exhaust port, reference numeral 13 is an intake side lash adjuster, reference numeral 14 is an exhaust side lash adjuster, reference numeral 15 is an intake side camshaft, and reference numeral 16 is an exhaust side camshaft. Reference numeral 17 denotes an intake side rocker arm, reference numeral 18 denotes an exhaust side rocker arm, reference numeral 30 denotes an intake valve spring seat, and reference numeral 31 denotes an exhaust valve spring seat.

図１，２に示すように、シリンダヘッド１には、ラッシュアジャスタ１３，１４（図１に示す）をそれぞれ収容する収容部２０，２１が凹設された複数のラッシュアジャスタボス部２２，２３が形成されている。これら複数のラッシュアジャスタボス部２２，２３には、収容部２０，２１内に収容されたラッシュアジャスタ１３，１４に作動油を供給するための作動油流路２４，２５（図１参照）が形成されている。本実施形態において、これら作動油流路２４，２５は、各ラッシュアジャスタボス部２２，２３間に架け渡されて、エンジンの長手方向に延設されている。   As shown in FIGS. 1 and 2, the cylinder head 1 has a plurality of lash adjuster boss portions 22 and 23 in which receiving portions 20 and 21 for receiving lash adjusters 13 and 14 (shown in FIG. 1) are recessed. Is formed. The plurality of lash adjuster boss portions 22 and 23 are formed with hydraulic oil passages 24 and 25 (see FIG. 1) for supplying hydraulic oil to the lash adjusters 13 and 14 accommodated in the accommodating portions 20 and 21. Has been. In the present embodiment, these hydraulic oil passages 24 and 25 are extended between the lash adjuster boss portions 22 and 23 and extend in the longitudinal direction of the engine.

吸気側のラッシュアジャスタボス部２２の近傍には、シリンダヘッド１の吸気側外壁とラッシュアジャスタボス部２２との間をエンジンの長手方向に延びる第１吸気側オイル流路３４が形成されている。また、ラッシュアジャスタボス部２２と吸気バルブスプリング座３０との間には、エンジンの長手方向に延びる第２吸気側オイル流路３５が形成されている。   In the vicinity of the lash adjuster boss portion 22 on the intake side, a first intake side oil passage 34 extending in the longitudinal direction of the engine is formed between the intake side outer wall of the cylinder head 1 and the lash adjuster boss portion 22. A second intake-side oil passage 35 extending in the longitudinal direction of the engine is formed between the lash adjuster boss portion 22 and the intake valve spring seat 30.

各ラッシュアジャスタボス部２２の間には、作動油流路２４（図１参照）よりも下方をエンジンの短手方向に延設されて、第１吸気側オイル流路３４と第２吸気側オイル流路３５とを連通させる第３吸気側オイル流路３６が形成されている。また、各ラッシュアジャスタボス部２２の内部には、収容部２０と第３吸気側オイル流路３６とを連通させる吸気側連通流路５０（図２参照）が形成されている。吸気側連通流路５０は、本発明の切り欠き部に相当する。吸気側連通流路５０の詳細については後述する。   Between each lash adjuster boss portion 22, a lower portion than the hydraulic oil passage 24 (see FIG. 1) extends in the short direction of the engine, and the first intake-side oil passage 34 and the second intake-side oil are extended. A third intake-side oil flow path 36 that communicates with the flow path 35 is formed. Further, in each lash adjuster boss portion 22, an intake side communication channel 50 (see FIG. 2) that connects the accommodating portion 20 and the third intake side oil channel 36 is formed. The intake side communication channel 50 corresponds to a notch of the present invention. Details of the intake side communication channel 50 will be described later.

排気側のラッシュアジャスタボス部２３の近傍には、シリンダヘッド１の排気側外壁とラッシュアジャスタボス部２３との間をエンジンの長手方向に延びる第１排気側オイル流路３７が形成されている。また、ラッシュアジャスタボス部２３と排気バルブスプリング座３１との間には、エンジンの長手方向に延びる第２排気側オイル流路３８が形成されている。   In the vicinity of the exhaust side lash adjuster boss portion 23, a first exhaust side oil passage 37 extending in the longitudinal direction of the engine is formed between the exhaust side outer wall of the cylinder head 1 and the lash adjuster boss portion 23. A second exhaust-side oil passage 38 extending in the longitudinal direction of the engine is formed between the lash adjuster boss portion 23 and the exhaust valve spring seat 31.

各ラッシュアジャスタボス部２３の間には、作動油流路２５（図１参照）よりも下方をエンジンの短手方向に延設されて、第１排気側オイル流路３７と第２排気側オイル流路３８とを接続する第３排気側オイル流路３９が形成されている。また、各ラッシュアジャスタボス部２３の内部には、収容部２１と第３排気側オイル流路３９とを連通させる排気側連通流路６０（図２参照）が形成されている。排気側連通流路６０は、本発明の切り欠き部に相当する。排気側連通流路６０の詳細については後述する。   Between each lash adjuster boss portion 23, a lower portion than the hydraulic oil passage 25 (see FIG. 1) extends in the short direction of the engine, and the first exhaust side oil passage 37 and the second exhaust side oil are extended. A third exhaust-side oil flow path 39 that connects the flow path 38 is formed. Further, in each lash adjuster boss portion 23, an exhaust side communication channel 60 (see FIG. 2) for communicating the accommodating portion 21 and the third exhaust side oil channel 39 is formed. The exhaust side communication flow path 60 corresponds to a notch portion of the present invention. Details of the exhaust side communication channel 60 will be described later.

次に、図３に基づいて、吸気側連通流路５０及び排気側連通流路６０の詳細について説明する。これら吸気側及び排気側連通流路５０，６０は略同様に構成されるため、以下、吸気側連通流路５０のみを説明し、排気側連通流路６０については説明を省略する。   Next, details of the intake side communication channel 50 and the exhaust side communication channel 60 will be described with reference to FIG. Since these intake-side and exhaust-side communication channels 50 and 60 are configured in substantially the same manner, only the intake-side communication channel 50 will be described below, and description of the exhaust-side communication channel 60 will be omitted.

吸気側連通流路５０は、ラッシュアジャスタボス部２２内を切り欠いて形成されて、収容部２０と第３吸気側オイル流路３６とを連通させる。より詳しくは、吸気側連通流路５０は、収容部２０の底部からエンジンの長手方向に向かって分岐すると共に、第３吸気側オイル流路３６の流路幅が最も狭くなる部分（例えば、作動油流路２４の下方において、隣接する各ラッシュアジャスタボス部２２が互いに最も近接する部分）に合流するように形成されている。   The intake side communication flow path 50 is formed by cutting out the inside of the lash adjuster boss portion 22, and connects the housing portion 20 and the third intake side oil flow path 36. More specifically, the intake-side communication flow path 50 branches from the bottom of the housing portion 20 toward the longitudinal direction of the engine, and the third intake-side oil flow path 36 has a narrowest flow width (for example, an operation). Below the oil flow path 24, the adjacent lash adjuster boss portions 22 are formed so as to merge with each other).

このように、収容部２０と第３吸気側オイル流路３６とを吸気側連通流路５０によって連通させることで、組み付け時にラッシュアジャスタ１３を収容部２０に挿入する際は、収容部２０内の空気が吸気側連通流路５０を介して第３吸気側オイル流路３６に排出され、吸気側連通流路５０が空気抜き流路として機能するようになっている。また、吸気側連通流路５０を第３吸気側オイル流路３６の流路幅が最も狭くなる部分に合流させることで、第３吸気側オイル流路３６の流路幅が効果的に拡張されるようになっている。   In this way, by connecting the accommodating portion 20 and the third intake-side oil passage 36 by the intake-side communicating passage 50, when the lash adjuster 13 is inserted into the accommodating portion 20 during assembly, Air is discharged to the third intake-side oil flow path 36 via the intake-side communication flow path 50, and the intake-side communication flow path 50 functions as an air vent flow path. Further, the flow width of the third intake side oil flow path 36 is effectively expanded by joining the intake side communication flow path 50 to the portion where the flow width of the third intake side oil flow path 36 is the narrowest. It has become so.

なお、吸気側連通流路５０は、収容部２０と第３吸気側オイル流路３６とを連通させる空気抜き流路に限定されず、収容部２０の周囲の肉厚を確保しつつ、第３吸気側オイル流路３６の流路幅が狭くなる部分を切り欠くことで、第３吸気側オイル流路３６の流路幅を効果的に拡張するように形成されてもよい。   The intake-side communication channel 50 is not limited to an air vent channel that allows the accommodating portion 20 and the third intake-side oil channel 36 to communicate with each other, and the third intake air can be secured while ensuring the thickness around the accommodating portion 20. It may be formed so as to effectively expand the flow path width of the third intake-side oil flow path 36 by notching a portion where the flow path width of the side oil flow path 36 becomes narrow.

以上詳述したように、本実施形態のシリンダヘッド１によれば、収容部２０，２１と第３オイル流路３６，３９とを連通する連通流路５０，６０を第３オイル流路３６，３９の流路幅が最も狭くなる部分に合流させたことで、第３オイル流路３６，３９の流路幅が拡張されるように構成されている。これにより、細密な第３オイル流路３６，３９の形成に必要な中子の断面積を大きく確保することが可能となり、鋳造時の熱膨張による中子の破損を効果的に抑止しつつ、ベイニングの発生を確実に防止することができる。   As described above in detail, according to the cylinder head 1 of the present embodiment, the communication passages 50 and 60 that connect the accommodating portions 20 and 21 and the third oil passages 36 and 39 are provided as the third oil passage 36 and the third oil passage 36. The flow path widths of the third oil flow paths 36 and 39 are configured to be expanded by merging with the narrowest flow path width of 39. Thereby, it becomes possible to ensure a large cross-sectional area of the core necessary for forming the fine third oil flow paths 36, 39, while effectively suppressing breakage of the core due to thermal expansion during casting, The occurrence of baining can be reliably prevented.

また、組み付け時にラッシュアジャスタ１３，１４を収容部２０，２１に挿入する際は、収容部２０，２１内の空気が連通流路５０，６０を介して第３オイル流路３６，３９に排出されることで、連通流路５０，６０が空気抜き流路として機能するようになり、ラッシュアジャスタ１３，１４の組み付け性を確実に向上することができる。   In addition, when the lash adjusters 13 and 14 are inserted into the housing portions 20 and 21 during assembly, the air in the housing portions 20 and 21 is discharged to the third oil passages 36 and 39 via the communication passages 50 and 60. Thus, the communication channels 50 and 60 function as air vent channels, and the assembling property of the lash adjusters 13 and 14 can be reliably improved.

なお、本発明は、上述の実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で、適宜変形して実施することが可能である。   In addition, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably and can implement.

例えば、ラッシュアジャスタ１３，１４は、吸気側及び排気側にそれぞれ設けられるものとして説明したが、吸気側又は排気側のいずれか一方にのみ設けられるものであってもよい。   For example, the lash adjusters 13 and 14 have been described as provided on the intake side and the exhaust side, respectively, but may be provided only on either the intake side or the exhaust side.

１ シリンダヘッド
１１ 吸気バルブ
１１Ａ 吸気ポート
１２ 排気バルブ
１２Ａ 排気ポート
１３ 吸気側ラッシュアジャスタ
１４ 排気側ラッシュアジャスタ
１５ 吸気側カムシャフト
１６ 排気側カムシャフト
１７ 吸気側ロッカーアーム
１８ 排気側ロッカーアーム
１９ インジェクタ
２０，２１ 収容部
２２，２３ ラッシュアジャスタボス部
２４，２５ 作動油流路
３０ 吸気バルブスプリング座
３１ 排気バルブスプリング座
３２ インジェクタボス部
３４ 第１吸気側オイル流路
３５ 第２吸気側オイル流路
３６ 第３吸気側オイル流路
３７ 第１排気側オイル流路
３８ 第２排気側オイル流路
３９ 第３排気側オイル流路
５０ 吸気側連通流路
６０ 排気側連通流路 DESCRIPTION OF SYMBOLS 1 Cylinder head 11 Intake valve 11A Intake port 12 Exhaust valve 12A Exhaust port 13 Intake side lash adjuster 14 Exhaust side lash adjuster 15 Intake side camshaft 16 Exhaust side camshaft 17 Intake side rocker arm 18 Exhaust side rocker arm 19 Injector 20, 21 Housing part 22, 23 Rush adjuster boss part 24, 25 Hydraulic oil flow path 30 Intake valve spring seat 31 Exhaust valve spring seat 32 Injector boss part
34 1st intake side oil flow path 35 2nd intake side oil flow path 36 3rd intake side oil flow path 37 1st exhaust side oil flow path 38 2nd exhaust side oil flow path 39 3rd exhaust side oil flow path 50 Intake Side communication channel 60 Exhaust side communication channel

Claims (5)

複数のボス部が隣接して配設されたシリンダヘッドであって、
隣接する前記複数のボス部間に形成されたオイル流路と、
前記ボス部の少なくとも一部を切り欠いて形成されて、前記オイル流路の流路幅を拡張する切り欠き部と、を備える
シリンダヘッド。 A cylinder head in which a plurality of bosses are arranged adjacent to each other,
An oil passage formed between the plurality of adjacent boss portions;
A cylinder head, comprising: a notch portion formed by notching at least a part of the boss portion and extending the width of the oil passage. 前記オイル流路は、前記複数のボス部間の所定位置で流路幅が最も狭く形成され、
前記切り欠き部は、前記オイル流路の流路幅が最も狭くなる部分に形成される
請求項１に記載のシリンダヘッド。 The oil passage is formed with a narrowest passage width at a predetermined position between the plurality of boss portions,
The cylinder head according to claim 1, wherein the cutout portion is formed in a portion where a flow path width of the oil flow path is the narrowest. 前記複数のボス部が、ラッシュアジャスタを収容する収容部が凹設されたラッシュアジャスタボス部であり、
前記切り欠き部が、前記ラッシュアジャスタボス部内に形成されて、前記収容部と前記オイル流路とを連通させる連通流路である
請求項１又は２に記載のシリンダヘッド。 The plurality of boss portions are lash adjuster boss portions in which housing portions for housing lash adjusters are recessed,
3. The cylinder head according to claim 1, wherein the notch is a communication channel that is formed in the lash adjuster boss and communicates the storage unit with the oil channel. 4. 前記連通流路が、前記収容部の底部から分岐して形成されて、前記ラッシュアジャスタを前記収容部に挿入する際に当該収容部内の空気を外部に逃がす空気抜き通路として機能する
請求項３に記載のシリンダヘッド。 The communication channel is formed by branching from a bottom portion of the housing portion, and functions as an air vent passage that allows air in the housing portion to escape to the outside when the lash adjuster is inserted into the housing portion. Cylinder head. 前記複数のボス部が前記エンジンの長手方向に直列に配置され、前記オイル流路が前記複数のボス部間を前記エンジンの短手方向に延設され、前記連通流路が前記エンジンの長手方向に延設された
請求項１から４の何れか一項に記載のシリンダヘッド。 The plurality of boss portions are arranged in series in the longitudinal direction of the engine, the oil passage extends between the plurality of boss portions in the short direction of the engine, and the communication passage is in the longitudinal direction of the engine. The cylinder head according to any one of claims 1 to 4, wherein the cylinder head is extended.
JP2015173080A 2015-09-02 2015-09-02 cylinder head Pending JP2017048734A (en)

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