JPS61250321A - Valve gear-cum-hydraulic tappet device for internal-combustion engine - Google Patents
Valve gear-cum-hydraulic tappet device for internal-combustion engineInfo
- Publication number
- JPS61250321A JPS61250321A JP9190885A JP9190885A JPS61250321A JP S61250321 A JPS61250321 A JP S61250321A JP 9190885 A JP9190885 A JP 9190885A JP 9190885 A JP9190885 A JP 9190885A JP S61250321 A JPS61250321 A JP S61250321A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- hydraulic tappet
- lubricating oil
- cylinder head
- valve
- 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
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】 Ａ０発明の目的 （１） 産業上の利用分野 本発明は油圧タペット付動弁装置に関するものである。[Detailed description of the invention] A0 Purpose of invention (1) Industrial application field The present invention relates to a valve train with a hydraulic tappet.
（２） 従来の技術
従来内燃機関の動弁装置において、弁間隙の調整をしな
いで済むように油圧タペットを付設したものは公知であ
る（特開昭５８−２１０３０９号公報参照）。(2) Prior Art A conventional valve operating system for an internal combustion engine is known in which a hydraulic tappet is attached so that adjustment of the valve gap is not required (see Japanese Patent Laid-Open No. 58-210309).
（３）発明が解決しようとする問題点
ところで前記油圧タペットは機関本体に設けた支持孔に
装着支持されるが、その装着を容易にするためには支持
孔と油圧タペット間に封入されるエアのエア抜きを行う
必要があり、このため従来ではシリンダヘッドに前記支
持孔の底部に通じる専用のエア抜き通路を穿設する煩わ
しさがある。(3) Problems to be Solved by the Invention By the way, the hydraulic tappet is installed and supported in a support hole provided in the engine body, but in order to facilitate the installation, air is sealed between the support hole and the hydraulic tappet. It is necessary to bleed the air out of the cylinder head, and for this reason, conventionally, there is the trouble of drilling a dedicated air bleed passage in the cylinder head that communicates with the bottom of the support hole.
そこで本発明はかかる専用のエア抜き孔を穿設せずに前
記エア抜きを行うことができるようにして前記専用のエ
ア抜き通路を特設しなくても済むようにした内燃機関の
油圧タペット付動弁装置を提供することを目的とするも
のである。Therefore, the present invention provides a hydraulic tappet-equipped engine for an internal combustion engine that allows the air to be bleed without drilling such a dedicated air bleed hole, thereby eliminating the need for the special provision of the dedicated air bleed passage. The object of the present invention is to provide a valve device.
Ｂ６発明の構成
（１） 問題点を解決するための手段本発明は前記目
的達成のため機関本体のシリンダヘッドに形成した支持
孔に装着される油圧タペットの作動端にカムフォロアを
揺動自在に支承させ、このカムフォロアの他端に開閉弁
ヲ連接し、前記シリンダヘッドに回転自在に支承される
動弁カム軸上の動弁カムにより前記カムフォロアを介し
て前記開閉弁を開閉作動するようにした内燃機関の動弁
装置において、前記シリンダヘッドには、前記支持孔に
隣接して前記油圧タペットに圧油を供給するための給油
路と、前記動弁カム軸の軸受等を潤滑するための潤滑油
路とを穿設し、前記潤滑油路を前記支持孔の底部に連通
させて核油路を、油圧タペット装着時のエア抜き通路に
兼用する。B6 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a structure in which a cam follower is swingably supported at the operating end of a hydraulic tappet installed in a support hole formed in a cylinder head of an engine body. An on-off valve is connected to the other end of the cam follower, and the on-off valve is opened and closed via the cam follower by a valve drive cam on a valve drive cam shaft rotatably supported by the cylinder head. In the valve train of an engine, the cylinder head includes an oil supply passage adjacent to the support hole for supplying pressure oil to the hydraulic tappet, and lubricating oil for lubricating a bearing of the valve train camshaft, etc. The lubricating oil passage is made to communicate with the bottom of the support hole, and the core oil passage also serves as an air release passage when the hydraulic tappet is installed.
（２）作 用
前記構成によれば、シリンダヘッドに形成した支持孔に
油圧タペットを装着する際、それら間に封入されるエア
は動弁機構の潤滑油路を通って外部に排出される。(2) Function According to the above configuration, when the hydraulic tappet is installed in the support hole formed in the cylinder head, the air sealed between them is discharged to the outside through the lubricating oil passage of the valve mechanism.
（３）実施例 次に本発明の一実施例について説明する。(3) Examples Next, one embodiment of the present invention will be described.
ＤＯＨＣ型４サイクル内燃機関の機関本体Ｅは、シリン
ダブロック１と、その上にガスケット３を介して重合結
着されるシリンダヘッド２とを備える。An engine body E of a DOHC type four-stroke internal combustion engine includes a cylinder block 1 and a cylinder head 2 which is superimposed and bonded thereon via a gasket 3.
機関本体Ｅのシリンダへラド２には点火栓４を備えた、
燃焼室５と、その燃焼室５に開口する吸、排気ポート６
．７とが形成され、それらのボート６．７は、シリンダ
ヘッド２に昇降可能に支持される吸、排気弁８．９によ
ってそれぞれ開閉される。The cylinder head 2 of the engine body E is equipped with a spark plug 4,
Combustion chamber 5 and intake and exhaust ports 6 opening into the combustion chamber 5
．． 7 are formed, and these boats 6.7 are respectively opened and closed by intake and exhaust valves 8.9 supported on the cylinder head 2 so as to be movable up and down.
前記吸、排気弁８．９はそれぞれ油圧タペット１０．１
０を備えた動弁機構１１によって所定のタイミングを以
て開閉駆動される。The intake and exhaust valves 8.9 each have a hydraulic tappet 10.1.
The opening/closing operation is performed at a predetermined timing by a valve operating mechanism 11 equipped with a valve mechanism 11 having a valve mechanism 11.
前記動弁装置１１は、シリンダヘッド２の上面に形成さ
れる動弁室１２内に設けられる。The valve train 11 is provided in a valve train chamber 12 formed on the upper surface of the cylinder head 2 .
前記油圧タペット１０付の動弁機構１１は従来公知の構
造を備えるもので、シリンダヘッド２の中央部にはＶ字
状に一対の支持孔１３．１３が形成され、これらの支持
孔１３．１３に油圧タペフ）１０．１０がそれぞれ装着
される。各油圧タペット１０．１０の作動端部、すなわ
ちプランジャ１４．１４の球面状上端には吸、排気用カ
ムフォロア１５．１６の一端が連接され、それらのカム
フォロア１５．１６の他端は弁ばね２１，２２によって
それぞれ閉弁方向に付勢される開閉弁、すなわち吸、排
気弁８．９の上端に係合される。吸、排気用カムフォロ
ア１５．１６の中間部上面にそれぞれ形成されるスリッ
パ面には、一対の動弁カム軸１７．１８の動弁カム１９
．２０が圧接され、これら動弁カム１９．２０の回転と
、前記弁ばね２１．２２との協働により吸、排気弁８．
９は所定のタイミングで開閉作動される。吸、排気用の
一対の動弁カム軸１７．１８は、シリンダヘッド２上に
形成される軸受半部２３．２４と、それらの上面に固着
される軸受キャップ２５．２６とで形成される軸受２７
．２８によってそれぞれ回転自在に支承される。The valve mechanism 11 with the hydraulic tappet 10 has a conventionally known structure, and a pair of V-shaped support holes 13.13 are formed in the center of the cylinder head 2. Hydraulic tapefs) 10 and 10 are respectively installed. One end of a suction/exhaust cam follower 15.16 is connected to the operating end of each hydraulic tappet 10.10, that is, the spherical upper end of the plunger 14.14, and the other end of the cam follower 15.16 is connected to a valve spring 21, 22 engages with the upper ends of the on-off valves, that is, the intake and exhaust valves 8.9, which are biased in the valve-closing direction. The valve drive cams 19 of the pair of valve drive cam shafts 17.18 are attached to the slipper surfaces formed on the upper surfaces of the intermediate portions of the intake and exhaust cam followers 15.16, respectively.
．． 20 are pressed against each other, and the intake and exhaust valves 8.
9 is opened and closed at a predetermined timing. A pair of valve drive camshafts 17.18 for intake and exhaust have bearings formed by bearing halves 23.24 formed on the cylinder head 2 and bearing caps 25.26 fixed to their upper surfaces. 27
．． 28, respectively rotatably supported.
シリンダへラド２の中央部には、前記支持孔１３．１３
に隣接して給油路２９．２９と潤滑油路３０．３０とが
前記支持孔１３．１３にそれぞれ隣接してクランク軸方
向に略平行に穿設され、前記給油路２９．２９は支持孔
１３．１３内に連通して該支持孔１３．１３に装着され
る油圧タベフ）１０．１０の給油孔に連通される。油圧
タペッ）１０．１０は従来公知の構造を備え、給油路２
９．２９からの圧油をうけて作動され、その上端がカム
フォロア１５．１６の揺動支持部に圧接される。また前
記潤滑油路３０．３０は、第２図に示すようにシリンダ
ヘッド２に穿設した分配通路３２：３２に連通され、該
分配通路３２．３２は動弁カム軸１７．１８の軸受２７
．２８の軸受面にそれぞれ開口される。図示しないが潤
滑油路３０内の潤滑油は動弁機構１１の他の被潤滑部、
たとえばカムフォロア１５．１６と動弁カム１９゜２０
との連接面にも供給することができる。また第１図に示
すように前記潤滑油路３０．３０の−側は、前記支持孔
１３．１３の底部にそれぞれ連通されており、前記支持
孔１３．１３にそれぞれ油圧タペッ）１０．１０を装着
する際、それら間に封入されるエアのエア抜き通路とし
て利用される。The support hole 13.13 is located in the center of the cylinder head 2.
An oil supply passage 29.29 and a lubricating oil passage 30.30 are bored approximately parallel to the crankshaft direction adjacent to the support hole 13.13, and the oil supply passage 29.29 is adjacent to the support hole 13. .13 and is connected to the oil supply hole of the hydraulic tab (10.10) installed in the support hole 13.13. Hydraulic tappet) 10.10 has a conventionally known structure, and the oil supply path 2
It is operated by receiving pressure oil from 9.29, and its upper end is pressed against the swinging support part of the cam follower 15.16. The lubricating oil passage 30.30 also communicates with a distribution passage 32:32 bored in the cylinder head 2, as shown in FIG.
．． 28 bearing surfaces are respectively opened. Although not shown, the lubricating oil in the lubricating oil passage 30 is supplied to other lubricated parts of the valve mechanism 11,
For example, cam follower 15.16 and valve drive cam 19°20
It can also be supplied to the connecting surface. Further, as shown in FIG. 1, the - side of the lubricating oil passages 30.30 are communicated with the bottoms of the support holes 13.13, respectively, and hydraulic tappets (10.10) are connected to the support holes 13.13, respectively. When installed, it is used as an air release passage for the air sealed between them.
次に本発明の実施例の作用について説明する。Next, the operation of the embodiment of the present invention will be explained.
いま機関の運転により一対の動弁カム軸１７゜１８が回
転されれば、動弁カム１９．２０の回転と、弁ばね２１
．２２の弾発力によりカムフォロア１５．１６は油圧タ
ペット１０．１０との連接部を支点として上下に揺動し
、吸、排気弁８，９を上下に摺動して吸、排気ポート６
．７は所定のタイミングで開閉される。If the pair of valve drive cam shafts 17 and 18 are now rotated due to engine operation, the valve drive cams 19 and 20 will rotate and the valve spring 21 will rotate.
．． 22, the cam follower 15.16 swings up and down using the joint with the hydraulic tappet 10.10 as a fulcrum, and slides the suction and exhaust valves 8 and 9 up and down to open the suction and exhaust ports 6.
．． 7 is opened and closed at a predetermined timing.
また機関の運転により駆動される油圧ポンプからの加圧
油は給油路２９．２９および潤滑油路３０．３０とに分
流され、給油路２９．２９を流れる圧油は支持孔１３．
１３を経て油圧タペット１０．１０へ給油され、該油圧
タペッ）１０．１０を作動してそれらの作動端をカムフ
ォロア１５゜１６に圧接する。また潤滑通路３０．３−
０を流れる潤滑油は分配通路３２．３２を通って動弁カ
ム１７．１８の軸受２７．２８に給油される。Further, pressurized oil from a hydraulic pump driven by engine operation is divided into oil supply passages 29.29 and lubricating oil passages 30.30, and pressure oil flowing through oil supply passages 29.29 is supplied to support holes 13.
13 to the hydraulic tappets 10.10, which actuate the hydraulic tappets 10.10 to press their working ends against the cam followers 15.16. Also, the lubrication passage 30.3-
The lubricating oil flowing through the valve cam 17.18 is supplied to the bearing 27.28 of the valve drive cam 17.18 through the distribution passage 32.32.
而して支持孔１３．１３に油圧タペット１０゜１０を装
着する際、支持孔１３．１３内には、エアが封入される
が、その封入エアは潤滑油路３０゜３０を通って外部に
放出され、前記油圧タペット１０．１０の支持孔１３．
１３への装着が容易となる。When the hydraulic tappet 10.10 is installed in the support hole 13.13, air is sealed in the support hole 13.13, but the sealed air passes through the lubricating oil path 30.30 to the outside. ejected into the support hole 13. of said hydraulic tappet 10.10.
13 becomes easy to attach.
Ｃ０発明の効果
以上の実施例により明らかなように本発明によれば、シ
リンダヘッドに、シリンダヘッドに形成した支持孔に隣
接して油圧タペットに圧油を供給するための給油路と、
動弁カム軸の軸受部等を潤滑するための潤滑油路とを穿
設し、前記潤滑油路を前記支持孔の底部に連通させて該
油路を、油圧タペット装着時のエア抜き通路に兼用した
ので、潤滑油路を支持孔への油圧タペット装着時の封入
エア抜き通路に利用することができ、特にシリンダヘッ
ドにエア抜き通路を特設する必要がなく、シリンダヘッ
ドの加工コストの低減に寄与することができる。C0 Effects of the Invention As is clear from the above embodiments, according to the present invention, an oil supply path for supplying pressure oil to the hydraulic tappet is provided in the cylinder head adjacent to the support hole formed in the cylinder head;
A lubricating oil passage for lubricating the bearing portion of the valve drive camshaft, etc. is drilled, and the lubricating oil passage is communicated with the bottom of the support hole, and the oil passage is used as an air bleed passage when the hydraulic tappet is installed. Since it is also used, the lubricating oil path can be used as a passage to bleed the sealed air when installing the hydraulic tappet into the support hole, and there is no need to provide a special air bleed passage in the cylinder head, which reduces processing costs for the cylinder head. can contribute.
図面は本発明の一実施例を示すもので、第１図は本発明
装置を備えた機関本体の、動弁装置の縦断面図、第２図
は機関本体の、動弁カム軸の軸受部の縦断面図である。
Ｅ・・・機関本体、The drawings show one embodiment of the present invention, and FIG. 1 is a vertical cross-sectional view of a valve train in an engine body equipped with the device of the present invention, and FIG. 2 is a bearing of a valve camshaft in the engine body. FIG. E...engine body,
Claims (1)
る油圧タペットの作動端にカムフォロアを揺動自在に支
承させ、このカムフォロアの他端に開閉弁を連接し、前
記シリンダヘッドに回転自在に支承される動弁カム軸上
の動弁カムにより前記カムフォロアを介して前記開閉弁
を開閉作動するようにした内燃機関の動弁装置において
、前記シリンダヘッドには、前記支持孔に隣接して前記
油圧タペットに圧油を供給するための給油路と、前記動
弁カム軸の軸受等を潤滑するための潤滑油路とを穿設し
、前記潤滑油路を前記支持孔の底部に連通させて該油路
を、油圧タペット装着時のエア抜き通路に兼用したこと
を特徴とする内燃機関の油圧タペット付動弁装置。A cam follower is swingably supported at the operating end of a hydraulic tappet installed in a support hole formed in a cylinder head of the engine body, an on-off valve is connected to the other end of the cam follower, and the cam follower is rotatably supported by the cylinder head. In the valve train for an internal combustion engine, the valve drive cam on the valve drive camshaft opens and closes the on-off valve via the cam follower, and the cylinder head includes the hydraulic tappet adjacent to the support hole. An oil supply passage for supplying pressure oil to the valve drive camshaft and a lubricating oil passage for lubricating the bearings of the valve drive camshaft, etc. are bored, and the lubricating oil passage is communicated with the bottom of the support hole to supply the oil. A valve train with a hydraulic tappet for an internal combustion engine, characterized in that a passageway is also used as an air release passage when a hydraulic tappet is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190885A JPS61250321A (en) | 1985-04-29 | 1985-04-29 | Valve gear-cum-hydraulic tappet device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190885A JPS61250321A (en) | 1985-04-29 | 1985-04-29 | Valve gear-cum-hydraulic tappet device for internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61250321A true JPS61250321A (en) | 1986-11-07 |
| JPH0144886B2 JPH0144886B2 (en) | 1989-10-02 |
Family
ID=14039677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9190885A Granted JPS61250321A (en) | 1985-04-29 | 1985-04-29 | Valve gear-cum-hydraulic tappet device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61250321A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960478A1 (en) * | 2014-06-25 | 2015-12-30 | Toyota Jidosha Kabushiki Kaisha | Camshaft bearing structure |
-
1985
- 1985-04-29 JP JP9190885A patent/JPS61250321A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960478A1 (en) * | 2014-06-25 | 2015-12-30 | Toyota Jidosha Kabushiki Kaisha | Camshaft bearing structure |
| JP2016008559A (en) * | 2014-06-25 | 2016-01-18 | トヨタ自動車株式会社 | Camshaft bearing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0144886B2 (en) | 1989-10-02 |
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