JPS63201305A - Valve system for four cycle engine - Google Patents

Valve system for four cycle engine

Info

Publication number
JPS63201305A
JPS63201305A JP3493087A JP3493087A JPS63201305A JP S63201305 A JPS63201305 A JP S63201305A JP 3493087 A JP3493087 A JP 3493087A JP 3493087 A JP3493087 A JP 3493087A JP S63201305 A JPS63201305 A JP S63201305A
Authority
JP
Japan
Prior art keywords
intake
valve
exhaust
valves
exhaust valves
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
JP3493087A
Other languages
Japanese (ja)
Other versions
JP2748264B2 (en
Inventor
Takeshi Watanabe
剛 渡辺
Tatsuo Hanashiro
花城　達夫
Kazuhisa Takahashi
一寿 高橋
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 JP62034930A priority Critical patent/JP2748264B2/en
Publication of JPS63201305A publication Critical patent/JPS63201305A/en
Application granted granted Critical
Publication of JP2748264B2 publication Critical patent/JP2748264B2/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To improve an intake/exhaust efficiency by forming the diameter of each of intake and exhaust valves in the center larger than those of ones on both sides in the captioned device in which each three intake and exhaust valves are provided interposing an ignition plug provided in the center of a combustion chamber in between, on a cylinder head. CONSTITUTION:An ignition plug 3 is screwed in the center part of the combustion chamber 2 of a cylinder head 1 and three intake valves 4 are provided on one side of the combustion chamber 2 while three exhaust valves 9 are provided on the other side. The intake and exhaust valves 4, 9 are formed into a mushroom type, energized in a closing direction by means of valve springs, and opened and closed by the rotation of cams 7, 12 on top of cam shafts 6, 11 via rocker arms. And, in this case, out of each three intake and exhaust valves 4, 9, the valve diameters of the intake and exhaust valve 4, 9 in the center are formed larger than the valve diameters of the intake and exhaust valves 4, 9 on both sides. Thereby, the opening area of the whole intake and exhaust valves 4, 9 can be made larger while mutually avoiding the buffering of the valve springs, to improve an intake/exhaust efficiency.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、四（１イクルエンジンの動弁装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a valve train for a four-cycle engine.

（従来の技術とその問題点） 四サイクルエンジンｔよ、シリンダーヘッドの燃焼室に
傘形の吸気弁と排気弁を設け、クランクシャフトに連動
するカムシャフトのカムで間■している。吸気効率及び
排気効率を高めて、エンジン性能を向上するには、吸気
弁及び排気弁の開口面積を大きくする必要があり、一つ
の吸気弁より二つの吸気弁、二つの吸気弁より三つの吸
気弁を設けるように、多弁化した方が開口面積を大きく
できる。このため、三つの吸気弁と三つの排気弁を燃焼
室に設けたものがある。例えば実開昭６１−５３０５号
公報参照。この場合、一般に、第４図に示すように、シ
リンダーヘッドの燃焼室Ａの中央に点火栓Ｂを設け、燃
焼室への一側に三つの吸気弁Ｃを配し、燃焼室Ａの他側
に三つの排気弁りを配しである。吸気弁Ｃ及び排気弁り
には、パルプスプリング、タペットを取付け、これらが
隣り合うので、これによって吸気弁Ｃ及びＩＡ気弁りの
弁径が弁ピッチしによって制約され、三つの吸気弁Ｃは
、同径の弁径のものを並べ、同様に三つの排気弁りも同
径の弁径のものを並べてあって、間口面積が制約される
。(Conventional technology and its problems) In a four-cycle engine, an umbrella-shaped intake valve and an exhaust valve are provided in the combustion chamber of the cylinder head, which are separated by a cam of a camshaft that is linked to the crankshaft. In order to increase intake efficiency and exhaust efficiency and improve engine performance, it is necessary to increase the opening area of the intake valve and exhaust valve. The opening area can be increased by increasing the number of valves, as in the case of providing valves. For this reason, some combustion chambers are provided with three intake valves and three exhaust valves. For example, see Japanese Utility Model Application No. 61-5305. In this case, generally, as shown in Fig. 4, an ignition plug B is provided in the center of the combustion chamber A of the cylinder head, three intake valves C are arranged on one side of the combustion chamber, and three intake valves C are arranged on the other side of the combustion chamber A. It is equipped with three exhaust valves. Pulp springs and tappets are attached to the intake valve C and the exhaust valve valve, and since these are adjacent to each other, the valve diameters of the intake valve C and the IA valve are restricted by the valve pitch, and the three intake valves C are , valves with the same diameter are lined up, and similarly, the three exhaust valves are lined up with the same valve diameter, which limits the frontage area.

（発明の目的） この発明は、一つの燃焼室の一側に三つの吸気弁を配し
、他側に三つの排気弁を配するもので、三つの吸気弁の
うち中央の吸気弁の弁径を大きくし、三つの排気弁のう
ち中央の排気弁の弁径を大きくして、開口面積を大きく
できて、吸気効率及び排気効率を向上させ、エンジン出
力を高く高性能にできる四１」゛イクルエンジンの動弁
装置を得ることを目的とする。(Objective of the Invention) This invention has three intake valves arranged on one side of one combustion chamber and three exhaust valves arranged on the other side. By increasing the diameter of the central exhaust valve among the three exhaust valves, the opening area can be increased, improving intake efficiency and exhaust efficiency, and increasing engine output and performance. The purpose is to obtain a valve train for a cycle 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。 The present invention will be described below with reference to embodiments shown in the drawings.

シリンダーヘッド１の燃焼室２の中央に点火栓３を螺着
する。燃焼室２の一側には、三つの吸気弁４を取付ける
。吸気弁４は傘型で弁バネ５で閉じる方向に付勢してあ
り、クランクシャフトに連動するカムシャフト６のカム
７の回転で、ロッカーアーム８を介して押し開くように
なっている。An ignition plug 3 is screwed into the center of the combustion chamber 2 of the cylinder head 1. Three intake valves 4 are attached to one side of the combustion chamber 2. The intake valve 4 is umbrella-shaped and biased in the closing direction by a valve spring 5, and is pushed open via a rocker arm 8 by rotation of a cam 7 of a camshaft 6 that is linked to the crankshaft.

同様に、燃焼室２の他側には、三つの排気弁９を取付け
る。排気弁９は傘型で、弁バネ１０で閉じる方向に付勢
してあり、クランクシャフトに連動するカムシャフト１
１のカム１２で［１ツカ−アーム１３を介して押し開く
ようになっている。しかして本発明は、三つの吸気弁４
のうち中央の吸気弁４の弁径を両側の吸気弁４の弁径よ
り大きくし、三つの排気弁９のうち、中央の排気弁９の
弁径を両側の排気弁９の弁径より大きくする。これによ
って、互いの弁バネ５．１０の干渉をさけながら吸気弁
４の全体開口面積を大きくでき、排気弁９の全体開口面
積も同様に大きくできる。Similarly, three exhaust valves 9 are attached to the other side of the combustion chamber 2. The exhaust valve 9 is umbrella-shaped and biased in the closing direction by a valve spring 10, and the camshaft 1 interlocks with the crankshaft.
It is pushed open by the cam 12 of No. 1 via the locking arm 13. Therefore, the present invention has three intake valves 4
The valve diameter of the central intake valve 4 is made larger than the valve diameter of the intake valves 4 on both sides, and the valve diameter of the central exhaust valve 9 among the three exhaust valves 9 is made larger than the valve diameter of the exhaust valves 9 on both sides. do. As a result, the entire opening area of the intake valve 4 can be increased while avoiding interference between the valve springs 5 and 10, and the entire opening area of the exhaust valve 9 can be similarly increased.

〔発明の作用〕[Action of the invention]

三つの吸気弁４は、中央の吸気弁４の弁径を両側の吸気
弁４より大きくしたので、弁バネ５の干渉をさけること
ができ、三つの吸気弁４の全体１ｊｆ１口ｉｆｉｉ１Ｍ
を増して吸気効率を高めることができる。In the three intake valves 4, the valve diameter of the center intake valve 4 is made larger than the intake valves 4 on both sides, so interference of the valve spring 5 can be avoided, and the overall diameter of the three intake valves 4 is 1jf1portifii1M.
can be increased to improve intake efficiency.

又、同様に三つの排気弁９は、中央の排気弁９の弁径を
両側の排気弁９より大きくしたので、弁バネ１０の干渉
をさけることができ、三つの排気弁９の全体開口面積を
増して排気効率を高めることができる。こうして、エン
ジン出力を＾く性能を高めることができる。又、燃焼室
２が小さい小型のものでも、三つの吸気弁４と三つの排
気弁９を配置することが可能になる。Similarly, in the three exhaust valves 9, the diameter of the central exhaust valve 9 is made larger than the exhaust valves 9 on both sides, so interference of the valve spring 10 can be avoided, and the overall opening area of the three exhaust valves 9 can be reduced. It is possible to increase the exhaust efficiency by increasing the In this way, engine output can be increased and performance can be improved. Moreover, even in a small combustion chamber 2, it is possible to arrange three intake valves 4 and three exhaust valves 9.

（発明の効果） 以上説明したように、この発明は、シリンダーヘッドの
燃焼室の中央に点火栓を設け、燃焼室の一側に三つの吸
気弁を設け、燃焼室の他側に三つの排気弁を設けるもの
に於いて、中央の吸気弁を両側の吸気弁より大きい径に
し、中央の仙気弁を両側の排気弁より大きい径にして弁
径を異径にしたので、互いの弁バネの干渉をさけて、吸
気弁及び排気弁全体の開口面積を増すことができ、吸気
効率及び排気効率が共によくなって、エンジン性能を高
出力にできる。又、燃焼室の小さい小型エンジンにも適
用できる。(Effects of the Invention) As explained above, the present invention provides a spark plug in the center of the combustion chamber of the cylinder head, three intake valves on one side of the combustion chamber, and three exhaust valves on the other side of the combustion chamber. In cases where valves are provided, the center intake valve has a larger diameter than the intake valves on both sides, and the center sacral valve has a larger diameter than the exhaust valves on both sides. It is possible to increase the opening area of the entire intake valve and exhaust valve, thereby improving both intake efficiency and exhaust efficiency, and achieving high engine performance and output. It can also be applied to small engines with small combustion chambers.

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

第１図乃至第３図は本発明の一実施例を示し、第１図は
平面図、第２図は第１図ｘ−Ｘ矢視断面図、第３図は第
１図Ｙ−Ｙ矢視断面図、第４図は従来例を示す燃焼室の
底面図である。 １・・・シリンダーヘッド、２・・・燃焼室、３・・・
点火栓、４・・・吸気弁、９・・・排気弁。 出願人代理人　　藤　　本　　博　　光ｌ 半２　図 易　３　図 ＄４　図1 to 3 show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a sectional view taken along the line X-X in FIG. 1, and FIG. The sectional view and FIG. 4 are bottom views of a combustion chamber showing a conventional example. 1... Cylinder head, 2... Combustion chamber, 3...
Spark plug, 4...intake valve, 9...exhaust valve. Applicant's agent Hiroshi Fujimoto Hiroshi I Half 2 Illustrations 3 Illustrations $ 4 Illustrations

Claims (1)

【特許請求の範囲】[Claims] シリンダーヘッドの燃焼室の中央に点火栓を設け、燃焼
室の一側に三つの吸気弁を設け、燃焼室の他側に三つの
排気弁を設けるものに於いて、中央の吸気弁を両側の吸
気弁より大きい径にし、中央の排気弁を両側の排気弁よ
り大きい径にして弁径を異径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。When the spark plug is installed in the center of the combustion chamber of the cylinder head, three intake valves are installed on one side of the combustion chamber, and three exhaust valves are installed on the other side of the combustion chamber, the central intake valve is installed on both sides. A valve train for a four-cycle engine, characterized in that the valve diameters are different by having a diameter larger than an intake valve, and a central exhaust valve having a larger diameter than the exhaust valves on both sides.
JP62034930A 1987-02-18 1987-02-18 Valve train for four-stroke engine Expired - Fee Related JP2748264B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62034930A JP2748264B2 (en) 1987-02-18 1987-02-18 Valve train for four-stroke engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62034930A JP2748264B2 (en) 1987-02-18 1987-02-18 Valve train for four-stroke engine

Publications (2)

Publication Number Publication Date
JPS63201305A true JPS63201305A (en) 1988-08-19
JP2748264B2 JP2748264B2 (en) 1998-05-06

Family

ID=12427911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62034930A Expired - Fee Related JP2748264B2 (en) 1987-02-18 1987-02-18 Valve train for four-stroke engine

Country Status (1)

Country Link
JP (1) JP2748264B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0361604A (en) * 1989-07-28 1991-03-18 Yamaha Motor Co Ltd Internal combustion engine
WO2017110957A1 (en) * 2015-12-26 2017-06-29 康仁 矢尾板 Engine with improved knocking resistance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB192954A (en) * 1922-03-16 1923-02-15 Harry Ralph Ricardo Improvements in or relating to cylinders for internal combustion engines
JPS60216013A (en) * 1984-04-11 1985-10-29 Yamaha Motor Co Ltd Intake valve mechanism in internal-combustion engine
JPS61186724U (en) * 1985-05-15 1986-11-21

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB192954A (en) * 1922-03-16 1923-02-15 Harry Ralph Ricardo Improvements in or relating to cylinders for internal combustion engines
JPS60216013A (en) * 1984-04-11 1985-10-29 Yamaha Motor Co Ltd Intake valve mechanism in internal-combustion engine
JPS61186724U (en) * 1985-05-15 1986-11-21

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0361604A (en) * 1989-07-28 1991-03-18 Yamaha Motor Co Ltd Internal combustion engine
WO2017110957A1 (en) * 2015-12-26 2017-06-29 康仁 矢尾板 Engine with improved knocking resistance

Also Published As

Publication number Publication date
JP2748264B2 (en) 1998-05-06

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