JPH0430210U - - Google Patents
Info
- Publication number
- JPH0430210U JPH0430210U JP7188590U JP7188590U JPH0430210U JP H0430210 U JPH0430210 U JP H0430210U JP 7188590 U JP7188590 U JP 7188590U JP 7188590 U JP7188590 U JP 7188590U JP H0430210 U JPH0430210 U JP H0430210U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic pressure
- swing arm
- speed cam
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 1
Landscapes
- Valve Device For Special Equipments (AREA)
Description
図面は本考案の実施例を示し、第１図は本考案
の要旨を示す図で第２図の−視断面図、第２
図は内燃機関における要部の縦断正面図、第３図
は第１図の−視断面図、第４図は第１図の
−視断面図、第５図は第４図の作用状態を示す
図である。
１……シリンダブロツク、２……シリンダヘツ
ド、４……吸気弁、７……排気弁、１３……カム
軸、１４……揺動アーム軸、１６……低速用カム
、１７……高速用カム、２０……主揺動アーム、
２１……副揺動アーム、２７……切換部材、２８
……ばね、２９……油圧室、３０……潤滑油ポン
プ、３１……油圧供給通路、１４ａ……揺動アー
ム軸の油圧通路、３４……切換弁、３５……回転
センサー、３６……制御回路、３８……油圧流出
ポート、３９……開閉弁、４１……開閉弁に対す
るばね。
The drawings show an embodiment of the present invention, and FIG. 1 is a diagram showing the gist of the invention, and FIG.
The figure is a longitudinal sectional front view of the main parts of an internal combustion engine, FIG. 3 is a sectional view taken from the side shown in FIG. 1, FIG. 4 is a sectional view taken from the side shown in FIG. 1, and FIG. It is a diagram. 1... Cylinder block, 2... Cylinder head, 4... Intake valve, 7... Exhaust valve, 13... Camshaft, 14... Rocking arm shaft, 16... Cam for low speed, 17... For high speed Cam, 20...main swing arm,
21...Sub-swing arm, 27...Switching member, 28
...Spring, 29...Hydraulic chamber, 30...Lubricating oil pump, 31...Hydraulic pressure supply passage, 14a...Hydraulic pressure passage of swinging arm shaft, 34...Switching valve, 35...Rotation sensor, 36... Control circuit, 38...hydraulic outflow port, 39...opening/closing valve, 41...spring for the opening/closing valve.
Claims (1)
速用カムと高速用カムとを設ける一方、吸気弁又
は排気弁及び前記低速用カムに接当する主揺動ア
ームと、前記高速用カムに接当する副揺動アーム
とを中空状の揺動アーム軸上に設け、更に、前記
両揺動アームの間に、その両者を連結状態及び非
連結状態に択一的に切換作動する油圧作動式の切
換部材を設け、該切換部材における作動用油圧室
に、油圧源からの油圧供給通路を、前記揺動アー
ム軸内の油圧通路を介して接続し、更に、前記切
換部材に、当該切換部材を前記油圧室内への後退
方向に押圧付勢するばねを設けて成る動弁装置に
おいて、前記揺動アーム軸の油圧通路内における
油圧を放出するための油圧放出ポートを設ける一
方、前記揺動アーム軸における油圧通路内に、当
該油圧通路に油圧が作用したとき前記油圧流出ポ
ートを閉じ、当該油圧通路に油圧が作用しないと
き前記油圧流出ポートを開くようにした開閉弁を
設けたことを特徴とする内燃機関における動弁装
置。 A low-speed cam and a high-speed cam are provided on a camshaft that rotates in conjunction with the crankshaft, while a main swing arm that contacts the intake valve or exhaust valve and the low-speed cam, and a main swing arm that contacts the high-speed cam. A sub-swinging arm that abuts is provided on a hollow swinging arm shaft, and a hydraulic actuator is provided between the two swinging arms to selectively switch the two into a connected state and a non-connected state. A switching member of the type is provided, a hydraulic pressure supply passage from a hydraulic source is connected to the operating hydraulic chamber in the switching member via a hydraulic passage in the swing arm shaft, and the switching member is further provided with a In a valve train comprising a spring that presses and biases a member in a backward direction into the hydraulic chamber, a hydraulic discharge port is provided for discharging hydraulic pressure in the hydraulic passage of the swing arm shaft, and The arm shaft is characterized in that an on-off valve is provided in the hydraulic passageway, which closes the hydraulic pressure outflow port when hydraulic pressure acts on the hydraulic passageway, and opens the hydraulic pressure outflow port when no hydraulic pressure acts on the hydraulic passageway. A valve train for an internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7188590U JPH0430210U (en) | 1990-07-04 | 1990-07-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7188590U JPH0430210U (en) | 1990-07-04 | 1990-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0430210U true JPH0430210U (en) | 1992-03-11 |
Family
ID=31609321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7188590U Pending JPH0430210U (en) | 1990-07-04 | 1990-07-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0430210U (en) |
-
1990
- 1990-07-04 JP JP7188590U patent/JPH0430210U/ja active Pending
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