JP2018145894A - Valve device of engine, valve guide cylinder and manufacturing method of valve guide cylinder - Google Patents
Valve device of engine, valve guide cylinder and manufacturing method of valve guide cylinder Download PDFInfo
- Publication number
- JP2018145894A JP2018145894A JP2017042139A JP2017042139A JP2018145894A JP 2018145894 A JP2018145894 A JP 2018145894A JP 2017042139 A JP2017042139 A JP 2017042139A JP 2017042139 A JP2017042139 A JP 2017042139A JP 2018145894 A JP2018145894 A JP 2018145894A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- guide
- tip
- guide cylinder
- large diameter
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000004520 agglutination Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 239000005539 carbonized material Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Images
Classifications
-
- 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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
Abstract
Description
本発明は、エンジンの弁装置に関し、詳しくは、弁ガイド筒内での弁軸の膠着を抑制することができるエンジンの弁装置と弁ガイド筒と弁ガイド筒の製造方法に関する。 The present invention relates to an engine valve device, and more particularly, to an engine valve device, a valve guide tube, and a method for manufacturing the valve guide tube that can suppress sticking of a valve shaft in the valve guide tube.
従来、エンジンの弁装置として、次のものがある(特許文献１参照)。
吸気ポートと、この吸気ポートの弁口を開閉するポペット弁と、このポペット弁の往復動をガイドする弁ガイド筒と、この弁ガイド筒が挿入されるガイド挿入孔と、ポートとガイド挿入孔を有するシリンダヘッドを備えた、エンジンの弁装置。
Conventionally, there are the following as a valve device of an engine (refer to patent documents 1).
An intake port, a poppet valve that opens and closes the valve port of the intake port, a valve guide cylinder that guides the reciprocation of the poppet valve, a guide insertion hole into which the valve guide cylinder is inserted, and a port and a guide insertion hole. An engine valve device comprising a cylinder head.
この種の弁装置によれば、ポペット弁の往復動を弁ガイド筒でスムーズにガイドすることができる利点がある。 This type of valve device has an advantage that the reciprocating motion of the poppet valve can be smoothly guided by the valve guide cylinder.
この弁装置では、弁ガイド筒の内周は、ポペット弁の弁軸をガイドする摺動ガイド面と、この摺動ガイド面よりも内径が大きい先端部径大面を備え、先端部径大面と弁軸の間にポートに向けて開口された先端部隙間が形成されている。 In this valve device, the inner periphery of the valve guide cylinder has a sliding guide surface that guides the valve shaft of the poppet valve, and a large tip diameter surface that has a larger inner diameter than the sliding guide surface. A tip end gap opened toward the port is formed between the valve shaft and the valve shaft.
《問題点》 弁ガイド筒内で弁軸が膠着するおそれがある。
特許文献１のものでは、先端部隙間内で燃料が炭化すると、弁軸と摺動ガイド面の間に炭化物が噛み込み、弁ガイド筒内で弁軸が膠着するおそれがある。
<< Problem >> There is a risk that the valve stem will stick in the valve guide cylinder.
In the thing of
本発明の課題は、弁ガイド筒内での弁軸の膠着を抑制することができるエンジンの弁装置と弁ガイド筒と弁ガイド筒の製造方法を提供することにある。 The subject of this invention is providing the manufacturing method of the valve apparatus of an engine, the valve guide cylinder, and the valve guide cylinder which can suppress the sticking of the valve shaft in a valve guide cylinder.
(請求項１に係る発明の発明特定事項)
図１または図２に例示するように、吸気と排気の少なくとも一方のポート(１)と、このポート(１)の弁口(１ａ)を開閉するポペット弁(２)と、このポペット弁(２)の往復動をガイドする弁ガイド筒(３)と、この弁ガイド筒(３)が挿入されるガイド挿入孔(４)と、ポート(１)とガイド挿入孔(４)を有するシリンダヘッド(５)を備えた、エンジンの弁装置において、次のようにした。
(Invention-specific matters of the invention of claim 1)
As illustrated in FIG. 1 or FIG. 2, at least one port (1) for intake and exhaust, a poppet valve (2) for opening and closing a valve port (1a) of this port (1), and this poppet valve (2 ), A cylinder head having a guide insertion hole (4) into which the valve guide cylinder (3) is inserted, a port (1) and a guide insertion hole (4). In the engine valve device having 5), the following operation was performed.
図１または図２に例示するように、弁ガイド筒(３)の内周は、ポペット弁(２)の弁軸(２ａ)をガイドする摺動ガイド面(３ａ)と、この摺動ガイド面(３ａ)よりも内径が大きい径大面(３ｂ)を備え、
径大面(３ｂ)は、ポート(１)側にある弁ガイド筒(３)の先端部(６)内に設けられた先端部径大面(６ａ)と、弁ガイド筒(３)の中間部(７)内に設けられた中間部径大面(７ａ)を備え、
摺動ガイド面(３ａ)は、先端部径大面(６ａ)と中間部径大面(７ａ)の間に設けられた先端寄りガイド面(６ｂ)と、中間部径大面(７ａ)よりも基端(８)側に設けられた基端側ガイド面(８ａ)を備えている。
As illustrated in FIG. 1 or FIG. 2, the inner periphery of the valve guide cylinder (3) has a sliding guide surface (3a) for guiding the valve shaft (2a) of the poppet valve (2), and this sliding guide surface. A large surface (3b) having an inner diameter larger than (3a),
The large diameter surface (3b) is located between the large diameter surface (6a) at the distal end portion (6) of the valve guide tube (3) on the port (1) side and the valve guide tube (3). An intermediate portion large surface (7a) provided in the portion (7),
The sliding guide surface (3a) includes a tip-side guide surface (6b) provided between the tip portion large diameter surface (6a) and the intermediate portion large diameter surface (7a), and the intermediate portion large diameter surface (7a). Is also provided with a base end side guide surface (8a) provided on the base end (8) side.
先端部径大面(６ａ)と弁軸(２ａ)の間にポート(１)に向けて開口された先端部内隙間(６ｃ)が形成され、中間部径大面(７ａ)と弁軸(２ａ)の間に中間部内隙間(７ｂ)が形成され、先端部内隙間(６ｃ)と中間部内隙間(７ｂ)は、内周に先端寄りガイド面(６ｂ)を備えた先端寄り円環突条(６ｄ)で区画されている、ことを特徴とするエンジンの弁装置。 A gap (6c) in the tip portion opened toward the port (1) is formed between the large tip portion diameter surface (6a) and the valve shaft (2a), and the intermediate portion large diameter surface (7a) and the valve shaft (2a) are formed. ) Is formed between the tip end inner gap (6c) and the intermediate portion inner gap (7b). The tip end annular protrusion (6d) is provided with a tip end guide surface (6b) on the inner periphery. The valve device of the engine, characterized by being partitioned by
(請求項５に係る発明の発明特定事項)
請求項１から請求項４のいずれかに記載されたエンジンの弁装置に用いる弁ガイド筒であって、次のようにした。
(Invention specific matter of invention of claim 5)
A valve guide cylinder for use in the engine valve device according to any one of
図１または図２に例示するように、弁ガイド筒(３)の内周は、ポペット弁(２)の弁軸(２ａ)をガイドする摺動ガイド面(３ａ)と、この摺動ガイド面(３ａ)よりも内径が大きい径大面(３ｂ)を備え、
径大面(３ｂ)は、ポート(１)側にある弁ガイド筒(３)の先端部(６)内に設けられた先端部径大面(６ａ)と、弁ガイド筒(３)の中間部(７)内に設けられた中間部径大面(７ａ)を備え、
摺動ガイド面(３ａ)は、先端部径大面(６ａ)と中間部径大面(７ａ)の間に設けられた先端寄りガイド面(６ｂ)と、中間部径大面(７ａ)よりも基端(８)側に設けられた基端側ガイド面(８ａ)を備えている。
As illustrated in FIG. 1 or FIG. 2, the inner periphery of the valve guide cylinder (3) has a sliding guide surface (3a) for guiding the valve shaft (2a) of the poppet valve (2), and this sliding guide surface. A large surface (3b) having an inner diameter larger than (3a),
The large diameter surface (3b) is located between the large diameter surface (6a) at the distal end portion (6) of the valve guide tube (3) on the port (1) side and the valve guide tube (3). An intermediate portion large surface (7a) provided in the portion (7),
The sliding guide surface (3a) includes a tip-side guide surface (6b) provided between the tip portion large diameter surface (6a) and the intermediate portion large diameter surface (7a), and the intermediate portion large diameter surface (7a). Is also provided with a base end side guide surface (8a) provided on the base end (8) side.
先端部径大面(６ａ)と弁軸(２ａ)の間にポート(１)に向けて開口された先端部内隙間(６ｃ)が形成され、中間部径大面(７ａ)と弁軸(２ａ)の間に中間部内隙間(７ｂ)が形成され、先端部内隙間(６ｃ)と中間部内隙間(７ｂ)は、内周に先端寄りガイド面(６ｂ)を備えた先端寄り円環突条(６ｄ)で区画されている、ことを特徴とするエンジンの弁装置に用いる弁ガイド筒。 A gap (6c) in the tip portion opened toward the port (1) is formed between the large tip portion diameter surface (6a) and the valve shaft (2a), and the intermediate portion large diameter surface (7a) and the valve shaft (2a) ) Is formed between the tip end inner gap (6c) and the intermediate portion inner gap (7b). The tip end annular protrusion (6d) is provided with a tip end guide surface (6b) on the inner periphery. The valve guide cylinder used for the valve apparatus of the engine characterized by the above-mentioned.
(請求項６に係る発明の発明特定事項)
請求項５に記載されたエンジンの弁装置に用いる弁ガイド筒の製造方法であって、
図３または図４に例示するように、弁ガイド筒(３)を金属粉末(９)の焼結で製造するに当たり、
金属粉末(９)の成形時に弁ガイド筒(３)の内周を形成する樹脂製中子(１０)を用い、金属粉末(９)の焼結時の熱で、樹脂製中子(１０)を溶融または熱分解させて、樹脂製中子(１０)を弁ガイド筒(３)の焼結品から除くことを特徴とする弁ガイド筒の製造方法。
(Invention specific matter of invention of claim 6)
A method for manufacturing a valve guide cylinder used in the engine valve device according to
As illustrated in FIG. 3 or FIG. 4, in manufacturing the valve guide cylinder (3) by sintering metal powder (9),
A resin core (10) that forms the inner periphery of the valve guide cylinder (3) when the metal powder (9) is molded, and the resin core (10) is heated by the heat during the sintering of the metal powder (9). A resin guide core (10) is removed from the sintered product of the valve guide tube (3) by melting or thermally decomposing the valve guide tube.
(請求項１または請求項５に係る発明)
請求項１または請求項５に係る発明は、次の効果を奏する。
《効果１》 弁ガイド筒内での弁軸の膠着を抑制することができる。
図１または図２に例示するように、本発明では、先端部内隙間(６ｃ)や先端寄りガイド面(６ｂ)で、排気中の未燃燃料や吸気中のＥＧＲガスの成分が炭化しても、炭化物は、中間部内隙間(７ｂ)に排出されて溜まり、炭化物が弁軸(２ａ)と摺動ガイド面(３ａ)の間に噛み込む不具合が抑制され、弁ガイド筒(３)内での弁軸(２ａ)の膠着を抑制することができる。
(Invention according to
The invention according to
<
As illustrated in FIG. 1 or FIG. 2, in the present invention, the unburned fuel in the exhaust and the EGR gas component in the intake gas are carbonized in the gap (6 c) in the tip and the guide surface (6 b) near the tip. The carbide is discharged and collected in the gap (7b) in the intermediate portion, and the problem that the carbide is caught between the valve shaft (2a) and the sliding guide surface (3a) is suppressed, and the carbide in the valve guide cylinder (3) is suppressed. Sticking of the valve shaft (2a) can be suppressed.
《効果２》 弁ガイド筒内での弁軸の膠着抑制機能が高い。
図１または図２に例示するように、本発明では、先端部内隙間(６ｃ)がポート(１)に向けて開口されているため、先端部内隙間(６ｃ)内の比較的高温の排気や吸気がポート(１)内を通過する比較的低温の排気や吸気と対流によって入れ替わり、弁ガイド筒(３)の先端部(６)に蓄積された熱が入れ替わった排気や吸気に放熱され、弁ガイド筒(３)の先端部(６)の過熱が抑制される。これにより、先端部内隙間(６ｃ)や先端寄りガイド面(６ｂ)での炭化物の生成が抑制され、弁ガイド筒(３)内でのポペット弁(２)の膠着抑制機能が高い。
<
As illustrated in FIG. 1 or FIG. 2, in the present invention, since the tip inner clearance (6c) is opened toward the port (1), relatively high-temperature exhaust or intake air in the tip inner clearance (6c) is obtained. Is replaced by convection with relatively cold exhaust or intake air that passes through the port (1), and heat accumulated in the tip (6) of the valve guide tube (3) is dissipated to the exchanged exhaust or intake air, and the valve guide Overheating of the tip (6) of the tube (3) is suppressed. Thereby, the production | generation of the carbide | carbonized_material in the front-end | tip inner space | gap (6c) and the front end guide surface (6b) is suppressed, and the sticking suppression function of the poppet valve (2) in the valve guide cylinder (3) is high.
《効果３》 弁ガイド筒と弁軸の偏磨耗が抑制される。
図１または図２に例示するように、本発明では、弁軸(２ａ)は、先端寄りガイド面(６ｂ)と基端側ガイド面(８ａ)に亘る比較的長い支持スパンで支持され、傾きにくいため、弁ガイド筒(３)と弁軸(２ａ)の偏磨耗が抑制される。
<
As illustrated in FIG. 1 or 2, in the present invention, the valve shaft (2 a) is supported by a relatively long support span extending from the distal guide surface (6 b) to the proximal guide surface (8 a). Therefore, uneven wear of the valve guide tube (3) and the valve shaft (2a) is suppressed.
(請求項６に係る発明)
請求項６に係る発明は、次の効果を奏する。
《効果》 弁ガイド筒の製造が簡単になる。
金属粉末(９)の焼結時の熱で、樹脂製中子(１０)が溶融により弁ガイド筒(３)の焼結品から流出して除かれ、或いは、熱分解により焼失して除かれるため、外周に凹凸のある樹脂製中子(１０)が弁軸ガイド筒(３)の焼結品から簡単に除去され、弁ガイド筒(３)の製造が簡単になる。
(Invention of Claim 6)
The invention according to
<Effect> Manufacture of the valve guide cylinder is simplified.
The resin core (10) flows out of the sintered product of the valve guide cylinder (3) by melting and is removed by heat during sintering of the metal powder (9), or is burned out by thermal decomposition and removed. Therefore, the resin core (10) having irregularities on the outer periphery is easily removed from the sintered product of the valve shaft guide tube (3), and the manufacture of the valve guide tube (3) is simplified.
図１は本発明の第１実施形態に係るエンジンの弁装置、図２は第２実施形態に係るエンジンの弁装置、図３は図１の弁装置で用いる弁ガイド筒の製造方法、図４は図２の弁装置で用いる弁ガイド筒の製造方法を説明する図で、各実施形態では、立形ディーゼルエンジンの排気弁装置について説明する。 1 is an engine valve device according to a first embodiment of the present invention, FIG. 2 is an engine valve device according to a second embodiment, FIG. 3 is a method of manufacturing a valve guide cylinder used in the valve device of FIG. These are the figures explaining the manufacturing method of the valve guide cylinder used with the valve apparatus of FIG. 2, and each embodiment demonstrates the exhaust valve apparatus of a vertical diesel engine.
まず、第１実施形態について説明する。
図１に示すように、この立形ディーゼルエンジンの排気弁装置は、排気のポート(１)と、このポート(１)の弁口(１ａ)を開閉するポペット弁(２)と、このポペット弁(２)の往復動をガイドする弁ガイド筒(３)と、この弁ガイド筒(３)が挿入されるガイド挿入孔(４)と、ポート(１)とガイド挿入孔(４)を有するシリンダヘッド(５)を備えている。
この種の弁装置によれば、ポペット弁(２)の往復動を弁ガイド筒(３)でスムーズにガイドすることができる利点がある。
First, the first embodiment will be described.
As shown in FIG. 1, the exhaust valve device of the vertical diesel engine includes an exhaust port (1), a poppet valve (2) that opens and closes a valve port (1a) of the port (1), and the poppet valve. A valve guide cylinder (3) for guiding the reciprocation of (2), a guide insertion hole (4) into which the valve guide cylinder (3) is inserted, a cylinder having a port (1) and a guide insertion hole (4). A head (5) is provided.
This type of valve device has an advantage that the reciprocating motion of the poppet valve (2) can be smoothly guided by the valve guide cylinder (3).
ポペット弁(２)は、弁軸(２ａ)と弁頭(２ｃ)を備えている。
ポート(１)の開口端には円環形の弁座(１ｂ)が内嵌され、弁座(１ｂ)内に弁口(１ａ)が開口されている。
この排気弁装置は、ポペット弁(２)の弁軸(２ａ)に取り付けられたスプリングリテーナ(１１)と、スプリングリテーナ(１１)とシリンダヘッド(５)の間に配置されたバルブスプリング(１２)と、弁軸(２ａ)に当接されたロッカアーム(１３)と、弁ガイド筒(３)の基端部に外嵌された弁軸シール(１４)を備え、バルブスプリング(１２)の付勢力で、弁頭(２ｃ)の弁面(２)が弁座(１ｂ)に着座し、ロッカアーム(１３)の押圧力により、バルブスプリング(１２)の付勢力に抗して、ポペット弁(２)が下降し、ポペット弁(２)が開く。
The poppet valve (2) includes a valve shaft (2a) and a valve head (2c).
An annular valve seat (1b) is fitted into the open end of the port (1), and a valve port (1a) is opened in the valve seat (1b).
This exhaust valve device includes a spring retainer (11) attached to a valve shaft (2a) of a poppet valve (2), and a valve spring (12) disposed between the spring retainer (11) and the cylinder head (5). And a rocker arm (13) in contact with the valve shaft (2a), and a valve shaft seal (14) externally fitted to the base end of the valve guide tube (3), and a biasing force of the valve spring (12) Then, the valve face (2) of the valve head (2c) is seated on the valve seat (1b), and the poppet valve (2) resists the urging force of the valve spring (12) by the pressing force of the rocker arm (13). Goes down and poppet valve (2) opens.
この排気弁装置の弁ガイド筒の構成は、次の通りである。
図１に示すように、弁ガイド筒(３)の内周は、ポペット弁(２)の弁軸(２ａ)をガイドする摺動ガイド面(３ａ)と、この摺動ガイド面(３ａ)よりも内径が大きい径大面(３ｂ)を備えている。
径大面(３ｂ)は、ポート(１)側にある弁ガイド筒(３)の先端部(６)内に設けられた先端部径大面(６ａ)と、弁ガイド筒(３)の中間部(７)内に設けられた中間部径大面(７ａ)を備えている。
摺動ガイド面(３ａ)は、先端部径大面(６ａ)と中間部径大面(７ａ)の間に設けられた先端寄りガイド面(６ｂ)と、中間部径大面(７ａ)よりも基端(８)側に設けられた基端側ガイド面(８ａ)を備えている。
The configuration of the valve guide cylinder of the exhaust valve device is as follows.
As shown in FIG. 1, the inner periphery of the valve guide tube (3) is formed by a sliding guide surface (3a) for guiding the valve shaft (2a) of the poppet valve (2) and the sliding guide surface (3a). Has a large diameter surface (3b) having a large inner diameter.
The large diameter surface (3b) is located between the large diameter surface (6a) at the distal end portion (6) of the valve guide tube (3) on the port (1) side and the valve guide tube (3). An intermediate portion large surface (7a) provided in the portion (7) is provided.
The sliding guide surface (3a) includes a tip-side guide surface (6b) provided between the tip portion large diameter surface (6a) and the intermediate portion large diameter surface (7a), and the intermediate portion large diameter surface (7a). Is also provided with a base end side guide surface (8a) provided on the base end (8) side.
先端部径大面(６ａ)と弁軸(２ａ)の間にポート(１)に向けて開口された先端部内隙間(６ｃ)が形成され、中間部径大面(７ａ)と弁軸(２ａ)の間に中間部内隙間(７ｂ)が形成され、先端部内隙間(６ｃ)と中間部内隙間(７ｂ)は、内周に先端寄りガイド面(６ｂ)を備えた先端寄り円環突条(６ｄ)で区画されている。 A gap (6c) in the tip portion opened toward the port (1) is formed between the large tip portion diameter surface (6a) and the valve shaft (2a), and the intermediate portion large diameter surface (7a) and the valve shaft (2a) are formed. ) Is formed between the tip end inner gap (6c) and the intermediate portion inner gap (7b). The tip end annular protrusion (6d) is provided with a tip end guide surface (6b) on the inner periphery. ).
図１に示すように、弁ガイド筒(３)の先端部(６)は、ガイド挿入孔(４)内に収容され、ガイド挿入孔(４)の内周面と弁ガイド筒(３)の先端部(６)の間にポート(１)に向けて開口される先端部外隙間(４ａ)が形成されている。 As shown in FIG. 1, the tip portion (6) of the valve guide tube (3) is accommodated in the guide insertion hole (4), and the inner peripheral surface of the guide insertion hole (4) and the valve guide tube (3). A distal end outer clearance (4a) that opens toward the port (1) is formed between the distal ends (6).
この実施形態では、先端部外隙間(４ａ)がポート(１)に向けて開口されているため、先端部外隙間(４ａ)内で比較的高温となった排気や吸気がポート(１)内を通過する比較的低温の排気や吸気と対流により入れ替わり、弁ガイド筒(３)の先端部(６)に蓄積された熱が入れ替わった排気や吸気に放熱され、弁ガイド筒(３)の先端部(６)の過熱が抑制される。これにより、先端部内隙間(６ｃ)や先端寄りガイド面(６ｂ)での炭化物の生成が抑制され、弁ガイド筒(３)内でのポペット弁(２)の膠着抑制機能が高い。 In this embodiment, since the outer end clearance (4a) is opened toward the port (1), the exhaust or intake air that has become relatively hot in the outer end clearance (4a) is in the port (1). The heat is accumulated in the tip (6) of the valve guide tube (3) by the convection with the relatively low temperature exhaust and intake air passing through the valve, and the heat is dissipated to the replaced exhaust and intake air, and the tip of the valve guide tube (3). Overheating of the part (6) is suppressed. Thereby, the production | generation of the carbide | carbonized_material in the front-end | tip inner space | gap (6c) and the front end guide surface (6b) is suppressed, and the sticking suppression function of the poppet valve (2) in the valve guide cylinder (3) is high.
図１に例すように、この実施形態では、ポペット弁(２)の全開時にポート(１)内に露出するポペット弁(２)の露出弁軸部分(２ｂ)が、単一径とされている。
この実施形態では、ポペット弁(２)の全開時にポート(１)内を高速で通過する排気や吸気の衝突を受けるポペット弁(２)の露出弁軸部分(２ｂ)が、単一径であるため、露出弁軸部分(２ｂ)に応力集中やヒートポイントの要因となる隅角部が形成されず、ポペット弁(２)の損傷が抑制される。
As illustrated in FIG. 1, in this embodiment, the exposed valve shaft portion (2b) of the poppet valve (2) exposed in the port (1) when the poppet valve (2) is fully opened has a single diameter. Yes.
In this embodiment, when the poppet valve (2) is fully opened, the exposed valve shaft portion (2b) of the poppet valve (2) that receives collision of exhaust and intake air that passes through the port (1) at high speed has a single diameter. Therefore, a corner portion that causes stress concentration or a heat point is not formed in the exposed valve shaft portion (2b), and damage to the poppet valve (2) is suppressed.
次に、本発明の第２実施形態について説明する。
図２に示すように、この第２実施形態では、中間部内隙間(７ｂ)は、内周に中間部ガイド面(７ｃ)を備えた中間部円環突条(７ｄ)で区画された複数の分割隙間(７ｅ)(７ｅ)で構成され、複数の分割隙間(７ｅ)(７ｅ)は弁ガイド筒(３)の軸長方向となる上下方向に並べて配置されている。
他の構成は、図１に示す第１実施形態と同じである。
図２中、第１実施形態と同一の要素には、図１と同一の符号を付しておく。
Next, a second embodiment of the present invention will be described.
As shown in FIG. 2, in this second embodiment, the intermediate inner gap (7b) has a plurality of intermediate annular ridges (7d) provided with an intermediate guide surface (7c) on the inner periphery. The plurality of divided gaps (7e) and (7e) are arranged side by side in the vertical direction that is the axial length direction of the valve guide cylinder (3).
Other configurations are the same as those of the first embodiment shown in FIG.
In FIG. 2, the same elements as those in the first embodiment are denoted by the same reference numerals as those in FIG.
この第２実施形態では、先端部内隙間(６ｃ)から先端寄りガイド面(６ｂ)を経て浮上した炭化物は、上方の中間部ガイド面(７ｃ)を経て上方の分割隙間(７ｅ)(７ｅ)に順次浮上し、複数の分割隙間(７ｅ)(７ｅ)に少量ずつ分散して溜められるため、中間内隙間(７ｂ)に溜まった炭化物の荷重で先端寄りガイド面(６ｃ)からの炭化物の浮上が妨げられる不具合が抑制され、弁ガイド筒内での弁軸(２ａ)の膠着抑制機能が高い。 In the second embodiment, the carbide that has floated from the tip inner clearance (6c) through the tip guide surface (6b) passes through the upper intermediate guide surface (7c) into the upper divided gap (7e) (7e). Since it floats in sequence and is dispersed and stored in a plurality of divided gaps (7e) and (7e), carbide floats from the guide surface (6c) closer to the tip due to the load of the carbide accumulated in the intermediate inner gap (7b). The trouble which is hindered is suppressed, and the sticking suppression function of the valve shaft (2a) in the valve guide cylinder is high.
また、この第２実施形態では、中間部内隙間(７ｂ)は、中間部円環突条(７ｄ)で複数の分割隙間(７ｅ)(７ｅ)に区画されているため、先端部内隙間(６ｃ)から中間部内隙間(７ｂ)を経て弁ガイド筒(３)の基端(８)側に至る熱の伝達が、中間部円環突条(７ｄ)で遮られ、弁ガイド筒(３)の基端部(８)の温度上昇が抑制される。これにより、弁ガイド筒(３)の基端(８)に設けられる弁軸シール(１１)の熱損傷が抑制される。 Further, in the second embodiment, the intermediate inner gap (7b) is divided into a plurality of divided gaps (7e) (7e) by the intermediate annular ring ridge (7d). The heat transfer from the intermediate portion inner clearance (7b) to the base end (8) side of the valve guide tube (3) is interrupted by the intermediate annular protrusion (7d), and the base of the valve guide tube (3) The temperature rise at the end (8) is suppressed. Thereby, the thermal damage of the valve shaft seal (11) provided in the base end (8) of the valve guide cylinder (3) is suppressed.
上記各実施形態では、排気のポート(１)とこれに用いるポヘット弁(２)について説明したが、各実施形態では、吸気のポートとこれに用いるポペット弁も同様の構造となっている。 In each of the above embodiments, the exhaust port (1) and the pohet valve (2) used therefor have been described, but in each embodiment, the intake port and the poppet valve used therefor have the same structure.
次に、図１に示す第１実施形態で用いる弁ガイド筒の製造方法について説明する。
図３に示すように、この製造方法では、弁ガイド筒(３)を金属粉末(９)の焼結で製造するに当たり、金属粉末(９)の成形時に弁ガイド筒(３)の内周を形成する樹脂製中子(１０)を用いる。
次に、金属粉末(９)の焼結時の熱で、樹脂製中子(１０)を溶融または熱分解させて、樹脂製中子(１０)を弁ガイド筒(３)の焼結品から除く。
Next, a method for manufacturing the valve guide cylinder used in the first embodiment shown in FIG. 1 will be described.
As shown in FIG. 3, in this manufacturing method, when the valve guide cylinder (3) is manufactured by sintering the metal powder (9), the inner periphery of the valve guide cylinder (3) is formed when the metal powder (9) is formed. The resin core (10) to be formed is used.
Next, the resin core (10) is melted or thermally decomposed by heat during sintering of the metal powder (9), and the resin core (10) is removed from the sintered product of the valve guide tube (3). except.
この実施形態では、金属粉末(９)の焼結時の熱で、樹脂製中子(１０)が溶融により弁ガイド筒(３)の焼結品から流出して除かれ、或いは、熱分解により焼失して除かれるため、外周に凹凸のある樹脂製中子(１０)を弁軸ガイド筒(３)の焼結品から簡単に除去され、弁ガイド筒(３)の製造が簡単になる。 In this embodiment, the resin core (10) flows out of the sintered product of the valve guide tube (3) by melting and is removed by heat during sintering of the metal powder (9), or by thermal decomposition. Since it is burned out and removed, the resin core (10) having an uneven outer periphery is easily removed from the sintered product of the valve shaft guide tube (3), and the manufacture of the valve guide tube (3) is simplified.
金属粉末(９)には、鉄系の焼結金属材料を用いる。
金属粉末(９)の成形には、金型(１５)によるプレス成形がなされる。金型(１５)は金属粉末(９)を充填するキャビティ(１５ａ)と金属粉末(９)をキャビティ(１５ａ)に供給する供給口(１５ｂ)を備えたダイ(１５ｃ)と、ダイ(１５ｃ)の内部で昇降する上下パンチ(１５ｄ)(１５ｅ)で構成されている。
樹脂製中子(１０)には、ナイロン等の熱可塑性樹脂やフェノール樹脂等の熱硬化性樹脂を用いることができる。
樹脂製中子(１０)に熱可塑性樹脂を用いた場合には、樹脂製中子(１０)は、溶融により弁ガイド筒(３)の焼結品から除かれる。
樹脂製中子(１０)に熱硬化性樹脂を用いた場合には、樹脂製中子(１０)は、熱分解により弁ガイド筒(３)の焼結品から除かれる。
樹脂製中子(１０)には、ガラス繊維等の繊維で補強したものを用いる。
この樹脂製中子(１０)の外周には、先端側から順に、先端部径大面(６ａ)、先端寄りガイド面(６ｂ)、中間部径大面(７ａ)、基端側ガイド面(８ａ)を形成するための凹凸が形成されている。
An iron-based sintered metal material is used for the metal powder (9).
The metal powder (9) is molded by press molding using a mold (15). The die (15) includes a die (15c) having a cavity (15a) for filling the metal powder (9), a supply port (15b) for supplying the metal powder (9) to the cavity (15a), and a die (15c). The upper and lower punches (15d) and (15e) move up and down inside.
For the resin core (10), a thermoplastic resin such as nylon or a thermosetting resin such as phenol resin can be used.
When a thermoplastic resin is used for the resin core (10), the resin core (10) is removed from the sintered product of the valve guide cylinder (3) by melting.
When a thermosetting resin is used for the resin core (10), the resin core (10) is removed from the sintered product of the valve guide cylinder (3) by thermal decomposition.
A resin core (10) reinforced with fibers such as glass fibers is used.
On the outer periphery of the resin core (10), in order from the distal end side, the distal end portion large diameter surface (6a), the distal end guide surface (6b), the intermediate portion large diameter surface (7a), the proximal end side guide surface ( Irregularities for forming 8a) are formed.
図２に示す第２実施形態で用いる弁ガイド筒の製造方法を図４に示す。
図４に示すように、この製造方法も、図３に示す製造方法と同じである。
図４中、図３と同一の要素には、図３と同一の符号を付しておく。
この樹脂製中子(１０)の外周には、先端側から順に、先端部径大面(６ａ)、先端寄りガイド面(６ｂ)、中間部径大面(７ａ)、中間部ガイド面(７ｃ)、基端側ガイド面(８ａ)を形成するための凹凸が形成されている。
FIG. 4 shows a method for manufacturing the valve guide tube used in the second embodiment shown in FIG.
As shown in FIG. 4, this manufacturing method is also the same as the manufacturing method shown in FIG.
4, the same elements as those in FIG. 3 are denoted by the same reference numerals as those in FIG. 3.
On the outer periphery of the resin core (10), in order from the distal end side, the distal end portion large diameter surface (6a), the distal end guide surface (6b), the intermediate portion large diameter surface (7a), the intermediate portion guide surface (7c). ), Irregularities for forming the proximal-side guide surface (8a) are formed.
(１)…ポート、(１ａ)…弁口、(２)…ポペット弁、(２ａ)…弁軸、(２ｂ)…露出弁軸部分、(３)…弁ガイド筒、(３ａ)…摺動ガイド面、(３ｂ)…径大面、(４)…ガイド挿入孔、(４ａ)…先端部外隙間、(５)…シリンダヘッド、(６)…先端部、(６ａ)…先端部径大面、(６ｂ)…先端寄りガイド面、(６ｃ)…先端部内隙間、(６ｄ)…先端寄り円環突条、(７)…中間部、(７ａ)…中間部径大面、(７ｂ)…中間部内隙間、(７ｃ)…中間部ガイド面、(７ｄ)…中間部円環突条、(７ｅ)…分割隙間、(８)…基端、(８ａ)…基端側ガイド面、(９)…金属粉末、(１０)…樹脂製中子。
(1) ... Port, (1a) ... Valve, (2) ... Poppet valve, (2a) ... Valve shaft, (2b) ... Exposed valve shaft part, (3) ... Valve guide cylinder, (3a) ... Sliding Guide surface, (3b) ... large diameter surface, (4) ... guide insertion hole, (4a) ... clearance at tip end, (5) ... cylinder head, (6) ... tip portion, (6a) ... large tip end diameter (6b) ... Guide surface near the tip, (6c) ... Gap in the tip, (6d) ... Ring ring ridge near the tip, (7) ... Middle, (7a) ... Large diameter of the middle, (7b) (7c) Intermediate portion guide surface, (7d) Intermediate portion annular ridge, (7e) Split space, (8) Base end, (8a) Base end side guide surface, 9) Metal powder, (10) Resin core.
Claims (6)
弁ガイド筒(３)の内周は、ポペット弁(２)の弁軸(２ａ)をガイドする摺動ガイド面(３ａ)と、この摺動ガイド面(３ａ)よりも内径が大きい径大面(３ｂ)を備え、
径大面(３ｂ)は、ポート(１)側にある弁ガイド筒(３)の先端部(６)内に設けられた先端部径大面(６ａ)と、弁ガイド筒(３)の中間部(７)内に設けられた中間部径大面(７ａ)を備え、
摺動ガイド面(３ａ)は、先端部径大面(６ａ)と中間部径大面(７ａ)の間に設けられた先端寄りガイド面(６ｂ)と、中間部径大面(７ａ)よりも基端(８)側に設けられた基端側ガイド面(８ａ)を備え、
先端部径大面(６ａ)と弁軸(２ａ)の間にポート(１)に向けて開口された先端部内隙間(６ｃ)が形成され、中間部径大面(７ａ)と弁軸(２ａ)の間に中間部内隙間(７ｂ)が形成され、先端部内隙間(６ｃ)と中間部内隙間(７ｂ)は、内周に先端寄りガイド面(６ｂ)を備えた先端寄り円環突条(６ｄ)で区画されている、ことを特徴とするエンジンの弁装置。 At least one port (1) for exhaust and intake, a poppet valve (2) for opening and closing the valve port (1a) of this port (1), and a valve guide cylinder (for guiding reciprocation of the poppet valve (2)) 3) In a valve device for an engine, comprising a guide insertion hole (4) into which the valve guide cylinder (3) is inserted, and a cylinder head (5) having a port (1) and a guide insertion hole (4). ,
The inner circumference of the valve guide cylinder (3) is a sliding guide surface (3a) for guiding the valve shaft (2a) of the poppet valve (2), and a large diameter surface having an inner diameter larger than the sliding guide surface (3a). (3b)
The large diameter surface (3b) is located between the large diameter surface (6a) at the distal end portion (6) of the valve guide tube (3) on the port (1) side and the valve guide tube (3). An intermediate portion large surface (7a) provided in the portion (7),
The sliding guide surface (3a) includes a tip-side guide surface (6b) provided between the tip portion large diameter surface (6a) and the intermediate portion large diameter surface (7a), and the intermediate portion large diameter surface (7a). Includes a base end side guide surface (8a) provided on the base end (8) side,
A gap (6c) in the tip portion opened toward the port (1) is formed between the large tip portion diameter surface (6a) and the valve shaft (2a), and the intermediate portion large diameter surface (7a) and the valve shaft (2a) are formed. ) Is formed between the tip end inner gap (6c) and the intermediate portion inner gap (7b). The tip end annular protrusion (6d) is provided with a tip end guide surface (6b) on the inner periphery. The valve device of the engine, characterized by being partitioned by
中間部内隙間(７ｂ)は、内周に中間部ガイド面(７ｃ)を備えた中間部円環突条(７ｄ)で区画された複数の分割隙間(７ｅ)(７ｅ)で構成され、複数の分割隙間(７ｅ)(７ｅ)は弁ガイド筒(３)の軸長方向となる上下方向に並べて配置されている、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 1,
The intermediate part inner gap (7b) is composed of a plurality of divided gaps (7e) (7e) partitioned by an intermediate annular ring ridge (7d) having an intermediate part guide surface (7c) on the inner periphery. An engine valve device characterized in that the division gaps (7e) and (7e) are arranged side by side in the vertical direction, which is the axial length direction of the valve guide cylinder (3).
弁ガイド筒(３)の先端部(６)は、ガイド挿入孔(４)内に収容され、ガイド挿入孔(４)の内周面と弁ガイド筒(３)の先端部(６)の間にポート(１)に向けて開口される先端部外隙間(４ａ)が形成されている、ことを特徴とするエンジンの弁装置。 The engine valve device according to claim 1 or 2,
The distal end portion (6) of the valve guide tube (3) is accommodated in the guide insertion hole (4), and is between the inner peripheral surface of the guide insertion hole (4) and the distal end portion (6) of the valve guide tube (3). A valve device for an engine, characterized in that an outer end clearance (4a) that opens toward the port (1) is formed.
ポペット弁(２)の全開時にポート(１)内に露出するポペット弁(２)の露出弁軸部分(２ｂ)が、単一径とされている、ことを特徴とするエンジンの弁装置。 The valve device for an engine according to any one of claims 1 to 3,
An engine valve device characterized in that the exposed valve shaft portion (2b) of the poppet valve (2) exposed in the port (1) when the poppet valve (2) is fully opened has a single diameter.
弁ガイド筒(３)の内周は、ポペット弁(２)の弁軸(２ａ)をガイドする摺動ガイド面(３ａ)と、この摺動ガイド面(３ａ)よりも内径が大きい径大面(３ｂ)を備え、
径大面(３ｂ)は、ポート(１)側にある弁ガイド筒(３)の先端部(６)内に設けられた先端部径大面(６ａ)と、弁ガイド筒(３)の中間部(７)内に設けられた中間部径大面(７ａ)を備え、
摺動ガイド面(３ａ)は、先端部径大面(６ａ)と中間部径大面(７ａ)の間に設けられた先端寄りガイド面(６ｂ)と、中間部径大面(７ａ)よりも基端(８)側に設けられた基端側ガイド面(８ａ)を備え、
先端部径大面(６ａ)と弁軸(２ａ)の間にポート(１)に向けて開口された先端部内隙間(６ｃ)が形成され、中間部径大面(７ａ)と弁軸(２ａ)の間に中間部内隙間(７ｂ)が形成され、先端部内隙間(６ｃ)と中間部内隙間(７ｂ)は、内周に先端寄りガイド面(６ｂ)を備えた先端寄り円環突条(６ｄ)で区画されている、ことを特徴とするエンジンの弁装置に用いる弁ガイド筒。 A valve guide cylinder used in the engine valve device according to any one of claims 1 to 4,
The inner circumference of the valve guide cylinder (3) is a sliding guide surface (3a) for guiding the valve shaft (2a) of the poppet valve (2), and a large diameter surface having an inner diameter larger than the sliding guide surface (3a). (3b)
The large diameter surface (3b) is located between the large diameter surface (6a) at the distal end portion (6) of the valve guide tube (3) on the port (1) side and the valve guide tube (3). An intermediate portion large surface (7a) provided in the portion (7),
The sliding guide surface (3a) includes a tip-side guide surface (6b) provided between the tip portion large diameter surface (6a) and the intermediate portion large diameter surface (7a), and the intermediate portion large diameter surface (7a). Includes a base end side guide surface (8a) provided on the base end (8) side,
A gap (6c) in the tip portion opened toward the port (1) is formed between the large tip portion diameter surface (6a) and the valve shaft (2a), and the intermediate portion large diameter surface (7a) and the valve shaft (2a) are formed. ) Is formed between the tip end inner gap (6c) and the intermediate portion inner gap (7b). The tip end annular protrusion (6d) is provided with a tip end guide surface (6b) on the inner periphery. The valve guide cylinder used for the valve apparatus of the engine characterized by the above-mentioned.
弁ガイド筒(３)を金属粉末(９)の焼結で製造するに当たり、
金属粉末(９)の成形時に弁ガイド筒(３)の内周を形成する樹脂製中子(１０)を用い、金属粉末(９)の焼結時の熱で、樹脂製中子(１０)を溶融または熱分解させて、樹脂製中子(１０)を弁ガイド筒(３)の焼結品から除く、ことを特徴とする弁ガイド筒の製造方法。
A method for manufacturing a valve guide cylinder used in the engine valve device according to claim 5,
In manufacturing the valve guide tube (3) by sintering metal powder (9),
A resin core (10) that forms the inner periphery of the valve guide cylinder (3) when the metal powder (9) is molded, and the resin core (10) is heated by the heat during the sintering of the metal powder (9). The resin guide core (10) is removed from the sintered product of the valve guide cylinder (3) by melting or thermally decomposing the valve guide cylinder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017042139A JP6797482B2 (en) | 2017-03-06 | 2017-03-06 | Manufacturing method of engine valve device, valve guide cylinder and valve guide cylinder |
| CN201711303234.3A CN108533348B (en) | 2017-03-06 | 2017-12-08 | Valve device of engine, valve guide cylinder and method for manufacturing valve guide cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017042139A JP6797482B2 (en) | 2017-03-06 | 2017-03-06 | Manufacturing method of engine valve device, valve guide cylinder and valve guide cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2018145894A true JP2018145894A (en) | 2018-09-20 |
| JP6797482B2 JP6797482B2 (en) | 2020-12-09 |
Family
ID=63489001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017042139A Active JP6797482B2 (en) | 2017-03-06 | 2017-03-06 | Manufacturing method of engine valve device, valve guide cylinder and valve guide cylinder |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6797482B2 (en) |
| CN (1) | CN108533348B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021161611A (en) * | 2020-03-30 | 2021-10-11 | 日立建機株式会社 | Work machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317808U (en) * | 1986-07-17 | 1988-02-05 | ||
| JPH01142502U (en) * | 1988-03-24 | 1989-09-29 | ||
| JPH06346110A (en) * | 1993-06-11 | 1994-12-20 | Mitsubishi Materials Corp | Valve guide member made of fe base sintered alloy excellent in wear resistance |
| JPH08290256A (en) * | 1995-04-20 | 1996-11-05 | Hino Motors Ltd | Method for forming fuel passage of nozzle holder in fuel injection nozzle |
| JP2003328711A (en) * | 2002-05-10 | 2003-11-19 | Isao Shirayanagi | Valve system for engine |
| JP2005127147A (en) * | 2003-10-21 | 2005-05-19 | Hino Motors Ltd | Valve guide structure |
| JP2017009050A (en) * | 2015-06-23 | 2017-01-12 | 太盛工業株式会社 | Minute fluid element and manufacture process thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4328324Y1 (en) * | 1968-03-07 | 1968-11-22 | ||
| JP4191709B2 (en) * | 2005-09-06 | 2008-12-03 | 株式会社ケーヒン | Engine intake system |
| CN106195352B (en) * | 2015-05-28 | 2020-02-14 | 纳博特斯克有限公司 | Valve device |
-
2017
- 2017-03-06 JP JP2017042139A patent/JP6797482B2/en active Active
- 2017-12-08 CN CN201711303234.3A patent/CN108533348B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317808U (en) * | 1986-07-17 | 1988-02-05 | ||
| JPH01142502U (en) * | 1988-03-24 | 1989-09-29 | ||
| JPH06346110A (en) * | 1993-06-11 | 1994-12-20 | Mitsubishi Materials Corp | Valve guide member made of fe base sintered alloy excellent in wear resistance |
| JPH08290256A (en) * | 1995-04-20 | 1996-11-05 | Hino Motors Ltd | Method for forming fuel passage of nozzle holder in fuel injection nozzle |
| JP2003328711A (en) * | 2002-05-10 | 2003-11-19 | Isao Shirayanagi | Valve system for engine |
| JP2005127147A (en) * | 2003-10-21 | 2005-05-19 | Hino Motors Ltd | Valve guide structure |
| JP2017009050A (en) * | 2015-06-23 | 2017-01-12 | 太盛工業株式会社 | Minute fluid element and manufacture process thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021161611A (en) * | 2020-03-30 | 2021-10-11 | 日立建機株式会社 | Work machine |
| JP7242602B2 (en) | 2020-03-30 | 2023-03-20 | 日立建機株式会社 | working machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108533348A (en) | 2018-09-14 |
| CN108533348B (en) | 2021-10-15 |
| JP6797482B2 (en) | 2020-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102122919B1 (en) | Method for manufacturing hollow poppet valve | |
| EP3040526A1 (en) | Multi-material valve guide system and method | |
| JP2018145894A (en) | Valve device of engine, valve guide cylinder and manufacturing method of valve guide cylinder | |
| JP2013002443A (en) | Insert for engine cylinder | |
| DK2821626T3 (en) | STAMP COLLECTION | |
| CN102192063B (en) | The method of atomizer and manufacture atomizer for fuel injector for internal combustion engines | |
| JP6821521B2 (en) | engine | |
| JP6815706B2 (en) | engine | |
| JP6760889B2 (en) | How to manufacture engine, valve guide and valve guide | |
| JP6804396B2 (en) | engine | |
| JP6727728B2 (en) | Engine, valve guide and valve guide manufacturing method | |
| JP6753821B2 (en) | How to manufacture engine, valve guide and valve guide | |
| JP6297852B2 (en) | Combustion engine pistons | |
| JP5113783B2 (en) | Cylinder liner | |
| JP6779585B2 (en) | How to manufacture engine, valve guide and valve guide | |
| US8684603B2 (en) | Sliding pulg and sliding element | |
| JP5342592B2 (en) | Cylinder structure of internal combustion engine | |
| CN203925646U (en) | A kind of internal combustion engine connection rod set and internal-combustion engine | |
| CN214091996U (en) | Valve rod structure | |
| JP2014238433A (en) | Lens-barrel integrated type lens | |
| JP2006035686A (en) | Shut-off valve for injection molding machine | |
| CN106988823A (en) | A kind of anti-lock valve sealing guidance set | |
| CN210686141U (en) | Engine and piston thereof | |
| US1980658A (en) | Piston | |
| JP2009148796A (en) | Hot chamber die casting machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20190626 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200622 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20200707 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20200902 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20201117 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20201117 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6797482 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |