JPS62162704A - Tappet valve device for 4 cycle engine - Google Patents

Tappet valve device for 4 cycle engine

Info

Publication number
JPS62162704A
JPS62162704A JP472786A JP472786A JPS62162704A JP S62162704 A JPS62162704 A JP S62162704A JP 472786 A JP472786 A JP 472786A JP 472786 A JP472786 A JP 472786A JP S62162704 A JPS62162704 A JP S62162704A
Authority
JP
Japan
Prior art keywords
valves
exhaust
ignition plug
rocker arm
center
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
Application number
JP472786A
Other languages
Japanese (ja)
Other versions
JPH06102965B2 (en
Inventor
Shigeaki Hamada
浜田　茂明
Hideo Fujiwara
秀雄 藤原
Hiroshi Saito
弘 斎藤
Naoki Takamura
直己 高村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP472786A priority Critical patent/JPH06102965B2/en
Publication of JPS62162704A publication Critical patent/JPS62162704A/en
Publication of JPH06102965B2 publication Critical patent/JPH06102965B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To dispose an ignition plug at the center of an engine, by disposing valve shafts of suction and exhaust valves in an enlarged V-shape and mounting the ignition plug at the center of them, disposing a cam shaft at the upper portion of the valves on the one side and driving valves on the other side by the cams of the cam shaft via rods. CONSTITUTION:Each two sets of suction valves 3 and exhaust values 4 are provided and the suction and exhaust values 3, 4 are disposed in an enlarged V-shape with respect to an axial line of a cylinder. An ignition plug 2 is disposed at the center of a combustion chamber. A cam shaft 7 is disposed at the upper portion of the exhaust valves 4 and the exhaust valves 4 are opened and closed via rocker arms 9. The suction valves 3 are opened and closed by cams 14 disposed at the opposite sides of cams 10 for the exhaust valves via rods 13 and rocker arms 11. An access space to the ignition plug 2 is formed between the rods 13.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、四サイクルエンジンの動弁装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a valve train for a four-stroke engine.

〔従来の技術とその問題点〕[Conventional technology and its problems]

四サイクルエンジンでは、シリンダーヘッドの中央に点
火栓を配し、その両側に二つの吸気弁と二つの排気弁を
備え、二つの吸気弁と二つの排気弁の直上に各々カムシ
ャフト設けて、カムで直接吸排気弁を押し開くようにし
たものがある。この型のものは、四バルブ型ＤＯＨＣ（
ダブル、オーバー、ヘッド、カム）型と称されている。In a four-cycle engine, the spark plug is placed in the center of the cylinder head, two intake valves and two exhaust valves are installed on both sides of the spark plug, and camshafts are installed directly above the two intake valves and two exhaust valves. There is one that allows you to directly push open the intake and exhaust valves. This type is a four-valve DOHC (
It is called double, over, head, cam) type.

そして、点火栓が中央にあって、良好な燃焼が得られ、
四バルブで吸気及び排気効率がよく、剛性も高くできて
、高回転高出力型のエンジンに適していることが知られ
ている。ところが、カムシャフトが二本必要で、部品点
数が多くなり、シリンダーヘッドも大型になって、型組
が重くなり、製造コストも高く高価になる不都合がある
。The ignition plug is located in the center, ensuring good combustion.
It is known that it has four valves, has good intake and exhaust efficiency, has high rigidity, and is suitable for high-speed, high-output engines. However, since two camshafts are required, the number of parts increases, the cylinder head becomes large, the mold becomes heavy, and manufacturing costs become high.

（発明の目的） この発明は、四バルブで点火栓を中央に配して良好な燃
焼と吸気及び排気効率が高くて高性能で、しかも一本の
カムシャフトで駆動できて、軽量安価にできる四サイク
ルエンジンの動弁装置を得ることを目的とする。(Purpose of the Invention) This invention has four valves with the spark plug placed in the center for good combustion, high intake and exhaust efficiency, and high performance.Moreover, it can be driven by a single camshaft, making it lightweight and inexpensive. The purpose is to obtain a valve train for a four-stroke engine.

〔発明の構成〕[Structure of the invention]

以下、本発明を図面に示す実施例によって説明する。 Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

シリンダーヘッド１の中央に点火栓２を螺着して取付け
るように配置する。点火栓２の両側には、二つの吸気弁
３と二つの排気弁４を備える。吸気弁３及び排気弁４は
、傘型をしていて、通常バルブスプリング５．６で上向
きに付勢して閉じており、バルブスプリング５．６に抗
して押下げると開くものである。シリンダーヘッド１の
片側の排気弁４の上方には、カムシャフト７をクランク
軸に連動して回転するように軸支する。二つの排気弁４
の内側に並べて、二つのラッシュアジャスター８を設け
、各々ロッカーアーム９の一端を支承させる。そして、
ロッカーアーム９の先端は、排気弁４の上端に当てる。An ignition plug 2 is arranged to be screwed and attached to the center of a cylinder head 1. Two intake valves 3 and two exhaust valves 4 are provided on both sides of the ignition plug 2. The intake valve 3 and the exhaust valve 4 are umbrella-shaped and are normally closed by being biased upward by a valve spring 5.6, and are opened by being pushed down against the valve spring 5.6. A camshaft 7 is supported above the exhaust valve 4 on one side of the cylinder head 1 so as to rotate in conjunction with the crankshaft. two exhaust valves 4
Two lash adjusters 8 are arranged side by side on the inside of the rocker arm 9, and each supports one end of a rocker arm 9. and,
The tip of the rocker arm 9 touches the upper end of the exhaust valve 4.

ラッシュアジャスター８は、油圧でロッカーアーム９の
隙間を自動詞Ｉｌするものである。二つのロッカーアー
ム９の上面は、カムシャフト７の内側に二つ並べた排気
用のカム１０に当てである。二つの吸気弁３の上端には
、各々ロッカーアーム１１の先端を当てる。ロッカーア
ーム１１は、ロッカーシャフト１２に揺動可能に軸着し
てあり、他端をアジャスター１３に当てる。アジャスタ
ー１３は、シリンダーヘッド１に摺動自在に保持してあ
って、ロッカーアーム１１の隙間を自動調節するように
できていて、他端を、カムシャフト７のカム１０の両外
側に配した吸気用のカム１４に当てである。The lash adjuster 8 adjusts the gap between the rocker arm 9 using hydraulic pressure. The upper surfaces of the two rocker arms 9 rest on two exhaust cams 10 arranged inside the camshaft 7. The top ends of the rocker arms 11 are placed on the upper ends of the two intake valves 3, respectively. The rocker arm 11 is pivotally attached to a rocker shaft 12 and has its other end in contact with an adjuster 13. The adjuster 13 is slidably held in the cylinder head 1 and is configured to automatically adjust the gap between the rocker arm 11. It depends on the cam 14 for use.

〔発明の作用〕[Action of the invention]

カムシャフト７は、クランク軸に連動して回転し、二つ
のカム１０は、回転によって、各々ロッカーアーム９を
押下げて、二つの排気弁を開く。The camshaft 7 rotates in conjunction with the crankshaft, and the two cams 10 each push down the rocker arm 9 by rotation to open the two exhaust valves.

又、二つのカム１４は、回転によって、二つのアジャス
ター１３を押して摺動させ、ロッカーアーム１１を揺動
させて、二つの吸気弁３を開く。吸気用のカム１４とア
ジャスター１３は、シリンダーヘッド１の中央をさけて
、両側に寄せてあり、点火栓２を中央に配置でき、良好
な燃焼室にできる。そして、二つの吸気弁３と二つの排
気弁４によって、吸気及び排気効率もよく、高回転高出
力型にできる。カムシャフト７は一本で足り、部品点数
を少く、軽量で安価に作ることができる。Further, the two cams 14 rotate to push and slide the two adjusters 13, swing the rocker arm 11, and open the two intake valves 3. The intake cam 14 and the adjuster 13 are placed on both sides of the cylinder head 1, avoiding the center, so that the spark plug 2 can be placed in the center and a good combustion chamber can be created. The two intake valves 3 and the two exhaust valves 4 provide good intake and exhaust efficiency, making it possible to achieve a high-speed, high-output type. Only one camshaft 7 is sufficient, and the number of parts is small, making it lightweight and inexpensive.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明は、シリンダーヘッドの
中央に点火栓を配し、その両側に二つの吸気弁と二つの
排気弁を備え、シリンダーヘッドの片側に寄せてカムシ
ャフトを回転自在に設け、内側をラッシュアジャスター
に支承したロッカーアームの先端を排気弁頭に当て、カ
ムシャフトのカムでロッカーアームを押圧し、先端を吸
気弁に当てたロッカーアームをロッカーシャフトに軸着
して点火栓の両側で摺動可能にしたアジャスターを介し
てカムシャフトのカムに当ててカムで押圧するようにし
たので、中央に点火栓を配しその両側に二つの吸気弁と
二つの排気弁を設けた良好な燃焼室にできて、吸気及び
排気効率も高い高回転高出力型のエンジンにできる。そ
して、カムシャフトは一本でよく、部品点数が少＜ｌｉ
汲で安価に生産できる。As explained above, this invention has an ignition plug placed in the center of the cylinder head, two intake valves and two exhaust valves on both sides, and a camshaft rotatably placed on one side of the cylinder head. , the tip of the rocker arm, whose inside is supported by the lash adjuster, is placed against the exhaust valve head, the cam of the camshaft presses the rocker arm, the tip of the rocker arm is placed against the intake valve, and the rocker arm is pivoted to the rocker shaft, and the ignition plug is turned off. Since the cam was pressed against the cam of the camshaft via an adjuster that could be slid on both sides, the ignition plug was placed in the center and two intake valves and two exhaust valves were installed on both sides. This allows for a high-speed, high-output engine with a high-speed combustion chamber and high intake and exhaust efficiency. Also, only one camshaft is required, and the number of parts is small.
It can be produced cheaply by pumping.

【図面の簡単な説明】[Brief explanation of drawings]

図は本発明の一実施例を示し、第１図は縦断側面図、第
２図は平面図である。 １・・・シリンダーヘッド、２・・・点火栓、３・・・
吸気弁、４・・・排気弁、７・・・カムシャフト、８・
・・ラッシュアジャスター、９・・・ロッカーアーム、
１０・・・カム、１１・・・ロッカーアーム、１２・・
・ロッカーシャフト、１３・・・アジャスター、１４・
・・カム。The drawings show one embodiment of the present invention, with FIG. 1 being a longitudinal sectional side view and FIG. 2 being a plan view. 1... Cylinder head, 2... Spark plug, 3...
Intake valve, 4...Exhaust valve, 7...Camshaft, 8.
...Lash adjuster, 9...Rocker arm,
10...Cam, 11...Rocker arm, 12...
・Rocker shaft, 13...Adjuster, 14・
··cam.

Claims (1)

【特許請求の範囲】[Claims] シリンダーヘッドの中央に点火栓を配し、その両側に二
つの吸気弁と二つの排気弁を備え、シリンダーヘッドの
片側に寄せてカムシャフトを回転自在に設け、内側をラ
ッシュアジャスターに支承したロッカーアームの先端を
排気弁頭に当て、カムシャフトのカムでロッカーアーム
を押圧し、先端を吸気弁に当てたロッカーアームをロッ
カーシャフトに軸着して点火栓の両側で摺動可能にした
アジャスターを介してカムシャフトのカムに当ててカム
で押圧するようにしたことを特徴とする四サイクルエン
ジンの動弁装置。A rocker arm with an ignition plug in the center of the cylinder head, two intake valves and two exhaust valves on both sides, a rotatable camshaft on one side of the cylinder head, and a lash adjuster on the inside. The tip of the rocker arm is placed against the exhaust valve head, the cam of the camshaft is used to press the rocker arm, and the tip of the rocker arm is placed against the intake valve. A valve train for a four-stroke engine, characterized in that the valve is pressed against a cam of a camshaft by the cam.
JP472786A 1986-01-13 1986-01-13 Four-cycle engine valve drive Expired - Fee Related JPH06102965B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP472786A JPH06102965B2 (en) 1986-01-13 1986-01-13 Four-cycle engine valve drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP472786A JPH06102965B2 (en) 1986-01-13 1986-01-13 Four-cycle engine valve drive

Publications (2)

Publication Number Publication Date
JPS62162704A true JPS62162704A (en) 1987-07-18
JPH06102965B2 JPH06102965B2 (en) 1994-12-14

Family

ID=11591927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP472786A Expired - Fee Related JPH06102965B2 (en) 1986-01-13 1986-01-13 Four-cycle engine valve drive

Country Status (1)

Country Link
JP (1) JPH06102965B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301422A1 (en) * 1992-01-20 1993-07-22 Mazda Motor
JP2008546950A (en) * 2005-06-23 2008-12-25 トーマス エンジン カンパニー リミテッド ライアビリティ カンパニー Compact valve actuation mechanism for barrel internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301422A1 (en) * 1992-01-20 1993-07-22 Mazda Motor
JP2008546950A (en) * 2005-06-23 2008-12-25 トーマス エンジン カンパニー リミテッド ライアビリティ カンパニー Compact valve actuation mechanism for barrel internal combustion engine

Also Published As

Publication number Publication date
JPH06102965B2 (en) 1994-12-14

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