JPH0183110U - - Google Patents
Info
- Publication number
- JPH0183110U JPH0183110U JP1987178966U JP17896687U JPH0183110U JP H0183110 U JPH0183110 U JP H0183110U JP 1987178966 U JP1987178966 U JP 1987178966U JP 17896687 U JP17896687 U JP 17896687U JP H0183110 U JPH0183110 U JP H0183110U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- guide member
- cam follower
- spring
- free
- 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
- 238000002485 combustion reaction Methods 0.000 claims 3
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Description
図面は本考案の一実施例を示すものであり、第
１図は平面図、第２図は第１図の―線断面図
、第３図は第１図の―線断面図、第４図は第
２図の―線拡大断面図である。
１ａ，１ｂ……吸気弁、２……カムシヤフト、
７，８……駆動カムフオロアとしての駆動ロツカ
アーム、９……自由カムフオロアとしての自由ロ
ツカアーム、１０……連結切換機構、１７……ロ
ストモーシヨン機構、１８……ガイド部材、１９
……ピストン、１９ａ……当接部、２０……スト
ツパ、２１……第１ばね、２２……第２ばね、２
４……ばね室、２６……エア抜き孔、Ｅ……機関
本体。
The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a cross-sectional view taken along the line - - of FIG. 1, FIG. 3 is a cross-sectional view taken along the line - - of FIG. 1, and FIG. is an enlarged sectional view taken along the line - in FIG. 2. 1a, 1b...Intake valve, 2...Camshaft,
7, 8... Drive rocker arm as drive cam follower, 9... Free rocker arm as free cam follower, 10... Connection switching mechanism, 17... Lost motion mechanism, 18... Guide member, 19
... Piston, 19a ... Contact portion, 20 ... Stopper, 21 ... First spring, 22 ... Second spring, 2
4... Spring chamber, 26... Air vent hole, E... Engine body.
Claims (1)
駆動カムフオロアと、吸気弁あるいは排気弁に対
して自由となり得る自由カムフオロアとが、カム
シヤフトの回転に応じて相互に異なる態様で作動
可能にして隣接配置され、各カムフオロア間には
、相互の連結および連結解除を切換可能な連結切
換機構が設けられ、前記自由カムフオロアと機関
本体との間には、自由カムフオロアをカムシヤフ
ト側に弾発的に押圧するロストモーシヨン機構が
介装される内燃機関の動弁装置において、ロスト
モーシヨン機構は、閉塞端を機関本体側にして機
関本体に嵌合される有底円筒状のガイド部材と、
ガイド部材に摺動可能に嵌合されるとともに自由
カムフオロア側の端部には自由カムフオロアに当
接する当接部が先細り状に形成されるピストンと
、ピストンに係合すべくガイド部材の開口端寄り
内面に着脱可能に固着されるストツパと、ピスト
ンを自由カムフオロアに当接する方向に弾発付勢
すべくピストンおよびガイド部材間に介装される
ばねとを備えることを特徴とする内燃機関の動弁
装置。 (2) 前記ピストンおよびガイド部材間には、ば
ね定数を比較的小さくした第１ばねと、ばね定数
を比較的大きくした第２ばねとが直列に介装され
ることを特徴とする実用新案登録請求の範囲第(1
)項記載の内燃機関の動弁装置。 (3) 前記ピストンの当接部には、ピストンおよ
びガイド部材間に画成されたばね室を外部に連通
させるエア抜き孔が穿設されることを特徴とする
実用新案登録請求の範囲第(1)項または第(2)項記
載の内燃機関の動弁装置。[Claims for Utility Model Registration] (1) A drive cam follower that is interlocked or connected to an intake valve or an exhaust valve, and a free cam follower that can be free with respect to the intake valve or exhaust valve, mutually move in accordance with the rotation of the camshaft. A connection switching mechanism is provided between each cam follower, which is operable in different manners and arranged adjacent to each other, and which can switch between mutual connection and disconnection. In a valve train for an internal combustion engine that is equipped with a lost motion mechanism that presses elastically toward the side, the lost motion mechanism has a bottomed cylindrical shape that is fitted into the engine body with the closed end facing the engine body. a guide member;
A piston that is slidably fitted to the guide member and has a tapered abutment portion that abuts the free cam follower at the end on the free cam follower side, and a piston near the open end of the guide member that engages with the piston. A valve train for an internal combustion engine, comprising a stopper detachably fixed to an inner surface, and a spring interposed between the piston and a guide member to urge the piston in a direction to abut the free cam follower. Device. (2) A registered utility model characterized in that a first spring with a relatively small spring constant and a second spring with a relatively large spring constant are interposed in series between the piston and the guide member. Claim No. 1
) A valve train for an internal combustion engine as described in item ). (3) The abutting portion of the piston is provided with an air vent hole that communicates the spring chamber defined between the piston and the guide member to the outside. ) or (2) above.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17896687U JPH0545763Y2 (en) | 1987-11-25 | 1987-11-25 | |
| US07/276,403 US4883027A (en) | 1987-11-25 | 1988-11-23 | Valve operating system for internal combustion engines |
| CA000584027A CA1324296C (en) | 1987-11-25 | 1988-11-24 | Valve operating system for internal combustion engines |
| EP88311160A EP0318303B1 (en) | 1987-11-25 | 1988-11-25 | Valve operating system for internal combustion engines |
| DE8888311160T DE3870166D1 (en) | 1987-11-25 | 1988-11-25 | VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17896687U JPH0545763Y2 (en) | 1987-11-25 | 1987-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0183110U true JPH0183110U (en) | 1989-06-02 |
| JPH0545763Y2 JPH0545763Y2 (en) | 1993-11-26 |
Family
ID=31470557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17896687U Expired - Lifetime JPH0545763Y2 (en) | 1987-11-25 | 1987-11-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0545763Y2 (en) |
-
1987
- 1987-11-25 JP JP17896687U patent/JPH0545763Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0545763Y2 (en) | 1993-11-26 |