JPH01313607A - Valve for internal combustion engine having large specific power and valve switchgear - Google Patents
Valve for internal combustion engine having large specific power and valve switchgearInfo
- Publication number
- JPH01313607A JPH01313607A JP1109270A JP10927089A JPH01313607A JP H01313607 A JPH01313607 A JP H01313607A JP 1109270 A JP1109270 A JP 1109270A JP 10927089 A JP10927089 A JP 10927089A JP H01313607 A JPH01313607 A JP H01313607A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valves
- closing device
- axis
- camshaft
- 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 title claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 1
- 101100441413 Caenorhabditis elegans cup-15 gene Proteins 0.000 description 1
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
- F02F1/4221—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder particularly for three or more inlet valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/265—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder peculiar to machines or engines with three or more intake valves per cylinder
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、比出力の大きな内燃機関の弁及び弁開閉装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve and a valve opening/closing device for an internal combustion engine having a large specific output.
内燃機関の比出力を大きくするには、弁路の断面積、と
りわけ吸気弁の断面積をできるだけ増大させる必要があ
る。この要求は、他方で、弁を収容しなければならない
シリンダ径の限界及び慣性を抑えて機関の高速回転を達
成するための弁の軽量化と衝突することになる。In order to increase the specific output of an internal combustion engine, it is necessary to increase the cross-sectional area of the valve passage, especially the cross-sectional area of the intake valve, as much as possible. This requirement, on the other hand, conflicts with the limitation of the cylinder diameter in which the valve must be accommodated and with the reduction in weight of the valve in order to reduce inertia and achieve high speed rotation of the engine.
上述の問題の可能な答えを捜していくうちに、シリンダ
当たりの弁の数を増すが、弁自体は小型、軽量化するこ
とで、シリンダ径と弁路の合計断面積の比を改善するこ
ととなった。Searching for possible answers to the above-mentioned problem, we found that the number of valves per cylinder should be increased, but the valves themselves should be smaller and lighter, thereby improving the ratio between the cylinder diameter and the total cross-sectional area of the valve passage. It became.
ある比出力を持つ機関では、２本の吸気弁及び２本の排
気弁を持つ構造を採用して、シリンダ当たり４本の弁を
持つ機関とすることで、上述のいろいろな要求をうまく
処理することが現在では慣行となっている。For an engine with a certain specific power output, a structure with two intake valves and two exhaust valves is adopted, resulting in an engine with four valves per cylinder, which successfully handles the various demands mentioned above. This is now common practice.
シリンダ当たりの弁の数が４より多い機関の構造とすれ
ば、たしかに、さらに軽量になり、また、弁路の合計断
面積も増大するので、機関の比出力をさらに増大させる
には望ましい。The design of the engine with more than four valves per cylinder is certainly more lightweight and also increases the total cross-sectional area of the valve passages, which is desirable in order to further increase the specific power of the engine.
しかしながら、このような構造は、弁の配置の問題及び
弁の開閉装置の実施の問題と衝突する。実際、シリンダ
当たり４本の弁を持つ機関の場合、２本の吸気弁及び２
本の排気弁の開閉は２本のカム軸がそれぞれ、弁杆の平
行な２個の同機能の弁（吸気弁及び排気弁）を単純に駆
動することによって実施可能であり、弁杆が平行である
と内燃チャンバの形状を機関の性能に合せて最適にしや
すい。However, such a structure conflicts with the problem of valve placement and the implementation of the valve opening/closing device. In fact, for an engine with four valves per cylinder, two intake valves and two
The opening and closing of an exhaust valve can be carried out by simply driving two camshafts with the same function (intake valve and exhaust valve) whose valve rods are parallel to each other, and the valve rods are parallel to each other. This makes it easy to optimize the shape of the internal combustion chamber to match the performance of the engine.
しかしながら、弁の数が多い機関の場合、例えば、３個
の吸気弁及び２個の排気弁の場合、構造の単純性を維持
し、かつ、同機能の弁の駆動を１本のカム軸を使って確
実に行うことが望ましいならば、３個の吸気弁は少なく
ともそのうちの１個の弁の弁杆は他の２個の弁の弁杆と
は平行でないように配置しなければ、すべての弁杆の端
部が同一軸心上に来るようにして１本のカム軸で開閉で
きるようにはできない。この理由は、スペース及び燃焼
チャンバのデザインから、３個の弁を一直線に並べるこ
とは不可能であるからである０機関に３個の排気弁を持
たせる場合にも、同様の問題が発生する。１本のカム軸
に収束する弁杆を備えた３個の吸気弁を持つ内燃機関に
ついては、例えば、欧州特許第００６３３８５号に記載
されている。However, in the case of an engine with a large number of valves, for example, in the case of three intake valves and two exhaust valves, it is necessary to maintain the simplicity of the structure and drive the valves with the same function using a single camshaft. If it is desirable to ensure that the three intake valves are It is not possible to have the ends of the valve rods on the same axis so that they can be opened and closed using a single camshaft. The reason for this is that due to space and combustion chamber design it is not possible to have three valves in a straight line.A similar problem occurs when an engine has three exhaust valves. . An internal combustion engine with three intake valves with valve rods converging on one camshaft is described, for example, in EP 0 063 385.
もちろん、弁杆の傾斜角が大きくなればなるほど、設計
者が取り組まなければならない。構造上の問題が大きく
なるし、燃焼室の出力が理論値に比べて低くなる。Of course, the greater the angle of inclination of the valve rod, the more the designer must address. Structural problems become more serious, and the output of the combustion chamber becomes lower than the theoretical value.
この問題の答は、本願出願人の名で１９８７年１０月２
３日付伊国特許願第２２３９４ Ａ／８７号に記載され
ているように、同機能のすべての弁を弁杆が平行となる
ように配置するとともに、フィンが揺動アームを使用し
て１本のカム軸でこのカム軸と整合していない弁の弁杆
にも届くようにしたことによる。The answer to this question was filed on October 2, 1987 in the name of the applicant.
As described in Italian Patent Application No. 22394 A/87 dated 3rd, all valves with the same function are arranged so that the valve rods are parallel, and the fins are arranged in one using a swinging arm. This is because the camshaft can reach the valve rods of valves that are not aligned with the camshaft.
この答によって、燃焼室の構造は単純化されるが、新た
な部品（フィンが揺動アーム）を使用しなければ１本の
カム軸で非整合の弁杆にも同様に届かせることはできな
くなった。This answer simplifies the structure of the combustion chamber, but it is not possible to reach misaligned valve stems with a single camshaft in the same way without using new parts (the fins are swinging arms). lost.
この技術水準からみて、本発明の目的は、比出力の大き
な内燃機関の弁及び弁開閉装置を得ることであるが、１
本のカム軸を使用して同機能の弁の開閉を可能とし、燃
焼チャンバの構造上の困難性を抑え、同時に、上述のフ
ィンが揺動アーム等の部品の追加を不要とすることであ
る。In view of this state of the art, an object of the present invention is to obtain a valve and a valve opening/closing device for an internal combustion engine with a large specific output.
It is possible to open and close a valve with the same function using a real camshaft, reducing the structural difficulties of the combustion chamber, and at the same time, the above-mentioned fins eliminate the need for additional parts such as a swing arm. .
本発明によれば、上記目的は、各シリンダに一群の吸気
弁及び一群の排気弁を備え、前記少なくともどちらかの
群の弁が１本のカム軸で開閉される３個の周方向に離間
した弁によって形成されており、前記３個の弁が１個の
中央弁及びこの中央弁より小径の２個の側方弁から構成
されていることを特徴とする弁及び弁開閉装置によって
達成される。According to the present invention, the above object is to provide each cylinder with a group of intake valves and a group of exhaust valves, and at least one of the valves in the group is opened and closed by a single camshaft in three circumferentially spaced valves. The invention is achieved by a valve and a valve opening/closing device, characterized in that the three valves are composed of one central valve and two side valves having a smaller diameter than the central valve. Ru.
加えて、さらに本発明によれば、前記２個の側方弁の弁
杆が互いに平行であるが前記中央弁の弁杆に対しては傾
斜しており、前記弁杆の少なくとも一方の軸心が前記カ
ム軸の回転軸心に対して横方向に変位しており、そして
、前記軸心の横方向変位を相殺させる手段が設けられて
いる。In addition, according to the invention, the valve rods of the two side valves are parallel to each other but inclined with respect to the valve rod of the central valve, and the axis of at least one of the valve rods is is displaced laterally with respect to the rotational axis of the camshaft, and means are provided for offsetting the lateral displacement of the axis.
前記手段は、例えば、前記軸心の変位した弁杆の頂部に
載せられ、それ自体が前記軸心に対して横方向に反対向
きに、かつ、前記弁杆の横方向変位量だけ変位している
案内カップによって構成することができる。The means may be mounted, for example, on top of a valve rod whose axis has been displaced, and is itself displaced transversely oppositely to the axis and by the amount of lateral displacement of the valve rod. It can be configured with a guide cup.
もうひとつのやり方として、前記全カップが同一軸心に
沿って各弁杆が位置するようにすれば、前記軸心の変位
した弁杆に関して前記カム軸の横方向変位を吸収するの
に必要とするより大きいカップを得ることが可能となる
。Alternatively, all of the cups may be arranged so that each valve stem is located along the same axis as required to accommodate the lateral displacement of the camshaft with respect to a displaced valve stem of the axis. This makes it possible to obtain a larger cup.
もちろん、前記２個の側方弁は前記中央弁より小径とし
たために、前記弁の頭部を接近させることが可能となっ
て、弁杆の往復動を傾斜させる必要が少なくなる。Of course, since the two side valves have smaller diameters than the central valve, the heads of the valves can be brought closer together, reducing the need to tilt the reciprocation of the valve stem.
このようにした構造上の利益は明白であり、特に、前記
側方弁を上述のように小径とした上に、少なくとも１個
の弁の弁杆が前記カム軸の回転中心に関して横方向に変
位するように前記弁杆を傾斜させてやると、利益がある
。The structural advantages of this are obvious, and in particular, in addition to the small diameter of the side valves as described above, the valve stem of at least one valve is displaced laterally with respect to the center of rotation of the camshaft. It is advantageous to tilt the valve rod so as to
もちろん、頂部の小変位は、前記上述の手段で簡単に相
殺できるので、前記弁の正確な開閉を阻害しないし、同
時に、前記弁杆の往復動の傾斜をさらに小さ（して、構
造の単純化及び燃焼チャンバの効率化の利点があがる。Of course, the small displacement of the top can be easily offset by the above-mentioned means, so it does not impede the accurate opening and closing of the valve, and at the same time, the slope of the reciprocating movement of the valve stem is further reduced (by which the structure is simplified). This increases the benefits of increased efficiency and efficiency of the combustion chamber.
本発明の態様は、添付図面に非限定例として例示された
実施例の以下の詳細な説明からより明らかになると思わ
れる。BRIEF DESCRIPTION OF THE DRAWINGS Aspects of the invention will become more apparent from the following detailed description of embodiments, illustrated by way of non-limiting example in the accompanying drawings.
図面に例示されているのは、内燃機関のシリンダ１のヘ
ッドであって、実例として、３個の吸気弁２．２′及び
２個の排気弁３を設けである。燃焼チャンバを良いもの
とし、排気係数を良いものとするために、内部を連通し
て、５個の弁を前記シリンダのヘッド４に周方向に離間
して配置し、前記シリンダの中心に関してほぼ対称とし
である。Illustrated in the drawing is the head of a cylinder 1 of an internal combustion engine, provided by way of example with three intake valves 2 , 2 ′ and two exhaust valves 3 . In order to obtain a good combustion chamber and a good exhaust coefficient, five valves are arranged circumferentially apart in the head 4 of the cylinder, with internal communication, and are approximately symmetrical with respect to the center of the cylinder. It's Toshide.
第１図から見られるように、３個の吸気弁２゜２′のう
ちの側方弁２のヘッド５は、中央弁２′のヘッド５′に
関して小径であって、Ｄに等しい側方弁と中央弁の中心
間の下方距離が定義される。As can be seen from FIG. 1, the head 5 of the side valve 2 of the three intake valves 2°2' has a smaller diameter with respect to the head 5' of the central valve 2', and the side valve equal to D. and the downward distance between the centers of the central valves is defined.
他方、第２．３図に示されているように、側方吸気弁２
は各吸気ボート７で開閉し、その弁杆６の軸心は互いに
平行で、（吸気ボート７′で開閉する）中央吸気弁２′
の弁杆６′の軸心に対して傾斜しているので、下方中心
開路ＨＤより短い上方中心開路Ｍｄが定義される。他方
、排気弁３は排気ボート８で開閉し、その弁杆１３の軸
心は互いに平行である。On the other hand, as shown in Fig. 2.3, the side intake valve 2
are opened and closed by each intake boat 7, the axes of the valve rods 6 are parallel to each other, and the central intake valve 2' (opened and closed by the intake boat 7')
Since the upper center opening Md is inclined with respect to the axis of the valve stem 6', an upper center opening Md that is shorter than the lower center opening HD is defined. On the other hand, the exhaust valves 3 are opened and closed by an exhaust boat 8, and the axes of the valve rods 13 are parallel to each other.
吸気弁２．２′の開閉は、回転軸心ｌＯを持つ第１カム
軸９によって与えられる一方、排気弁３の開閉は、回転
軸心１２を持つ第２カム軸１１によって与えられる。The opening and closing of the intake valve 2.2' is provided by a first camshaft 9 having an axis of rotation lO, while the opening and closing of the exhaust valve 3 is provided by a second camshaft 11 having an axis of rotation 12.
第２図に示されているように、排気弁３の弁杆１３は、
軸心がカム軸１１の回転軸心１２を通り、カム軸１１の
カム１４からヘッド４の各座１６にスライド自在に収容
された案内カップ１５を介して作動されるようになって
いる。As shown in FIG. 2, the valve rod 13 of the exhaust valve 3 is
The shaft center passes through the rotational axis center 12 of the camshaft 11, and the cam 14 of the camshaft 11 is operated via a guide cup 15 that is slidably accommodated in each seat 16 of the head 4.
吸気弁２．２′の弁杆６，６′は他方、カム軸９の回転
軸心に関して反対向きに横方向に変位しており、そして
、カム軸９はカム１７．１７’と共に、ヘッド４の各座
１９，１９’にスライド自在に収容された案内カップ１
８．１８’によって弁杆６，６′を作動するようになっ
ている。The valve rods 6, 6' of the intake valve 2.2', on the other hand, are laterally displaced in opposite directions with respect to the axis of rotation of the camshaft 9, which together with the cam 17.17' A guide cup 1 is slidably housed in each seat 19, 19' of the
8.18' actuates the valve levers 6, 6'.
側方弁２のカップ１８（第２図）は弁杆６の軸心に関し
て横方向に変位しており、その変位の向き及び変位量は
、カム軸９の軸心に関して弁杆６の軸心の横方向変位を
相殺するようになっている。中央弁２′のカップ１８′
の場合には（第３図）、同様の変位が反対向きに起こる
。The cup 18 (FIG. 2) of the side valve 2 is displaced in the lateral direction with respect to the axis of the valve rod 6, and the direction and amount of displacement are determined according to the axis of the valve rod 6 with respect to the axis of the camshaft 9. It is designed to offset the lateral displacement of. Cup 18' of central valve 2'
(FIG. 3), a similar displacement occurs in the opposite direction.
弁ヘッド５は弁ヘッド５′に比べて小径であることもあ
って、吸気弁２，２′の弁杆の往復動の傾斜は許容範囲
内に抑えられるし、１本のカム軸を使用する可能性を依
然として維持できるし、さらに、揺動アーム等の補助要
素によらずに済むようになっている。Since the valve head 5 has a smaller diameter than the valve head 5', the inclination of the reciprocating movement of the valve rods of the intake valves 2 and 2' can be suppressed within an allowable range, and a single camshaft can be used. The possibilities are still maintained and, moreover, auxiliary elements such as rocking arms are no longer required.
もうひとつのやり方として、カップ１８．１８’を弁杆
６，６′と同じ軸心に沿って整合させることができ、弁
杆６，６′の軸心の横方向変位を相殺させるには、カッ
プ１８．１８’を適宜大きくしてやればよい。この解決
方法は、第４．５図に示されている。Alternatively, the cup 18, 18' can be aligned along the same axis as the valve stem 6, 6', to compensate for the lateral displacement of the axis of the valve stem 6, 6'. The cups 18 and 18' may be made larger as appropriate. This solution is illustrated in Figure 4.5.
加えて、弁杆６の軸心がカム軸９の回転軸心を通るよう
にして、弁杆６′の軸心のみがカム軸９の回転軸心に関
して横方向に変位するようにも、また、その逆も可能で
ある。In addition, the axial center of the valve rod 6 may be made to pass through the rotational axis of the camshaft 9, so that only the axial center of the valve rod 6' is displaced in the lateral direction with respect to the rotational axis of the camshaft 9. , and vice versa.
第１図は、本発明の第１実施例による弁装置を設けた燃
焼チャンバの下から見た模式的な平面図であり、
第２図は、前記燃焼チャンバの第１図の■−■線沿いの
縦断面を示しており、
第３図は、前記燃焼チャンバの第１図の■−■線沿いの
縦断面を示しており、
第４図は、第２図と同様の断面図で、本発明の第２実施
例による弁装置を示しており、第５図は、第３図と同様
の断面図で、第４図に関連している。
ｌ・・・シリンダ、２・・・中央吸気弁、２′・・・側
方吸気弁、３・・・排気弁、４・・・シリンダ・ヘッド
、６・・・中央吸気弁の弁杆、６′・・・側方吸気弁の
弁杆、９，１１・・・カム軸、１０．１２・・・回転軸
心、１４．１７゜１７′・・・カム、１５．１８．１８
’・・・案内カップ。
代理人 弁理士 小 川 信 −FIG. 1 is a schematic plan view of a combustion chamber provided with a valve device according to a first embodiment of the present invention, viewed from below, and FIG. 2 is a schematic plan view of the combustion chamber shown in FIG. 3 shows a longitudinal section of the combustion chamber along the line ■-■ in FIG. 1, and FIG. 4 is a sectional view similar to FIG. 2, FIG. 5 shows a sectional view similar to FIG. 3 and is related to FIG. 4, showing a valve arrangement according to a second embodiment of the invention. l... Cylinder, 2... Central intake valve, 2'... Side intake valve, 3... Exhaust valve, 4... Cylinder head, 6... Valve rod of central intake valve, 6'... Valve rod of side intake valve, 9, 11... Cam shaft, 10.12... Rotation axis center, 14.17° 17'... Cam, 15.18.18
'...Guidance cup. Agent Patent Attorney Nobuo Ogawa −
Claims (1)
、これら弁群の少なくともどちらかの弁群が１本のカム
軸で開閉される３個の周方向に離間した弁によって形成
されている比出力の大きな内燃機関の弁及び弁開閉装置
において、 前記３個の弁が１個の中央弁（２′）及びこの中央弁（
２′）より小径の２個の側方弁（２）から構成されてい
ることを特徴とする弁及び弁開閉装置。 ２、前記２個の側方弁（２）の弁杆（６）が互いに平行
であるが前記中央弁（２′）の弁杆（６′）に対しては
傾斜しており、前記弁杆（６、６′）の少なくとも一方
の軸心が前記カム軸（９）の回転軸心（１０）に対して
横方向に変位しており、そして、前記軸心の横方向変位
を相殺させるための手段（１８、１８′）が設けられて
いることを特徴とする請求項１記載の弁及び弁開閉装置
。 ３、前記側方弁（２）の弁杆（６）及び前記中央弁（２
′）の弁杆（６′）が前記カム軸（９）の回転中心（１
０）に関して両側に配されていることを特徴とする請求
項２記載の弁及び弁開閉装置。 ４、前記手段（１８、１８′）が、前記軸心の変位した
弁杆の頂部に載せられ、それ自体が前記軸心に対して横
方向に反対向きに、前記弁杆の横方向変位量だけ変位し
ている案内カップ（１８、１８′）によって構成されて
いることを特徴とする請求項２記載の弁及び弁開閉装置
。 ５、前記手段が、前記軸心の変位した弁杆の頂部に載せ
られ、前記カム軸（９）に関して前記弁杆の横方向変位
を相殺するのに必要とされるより大きいサイズを持つ案
内カップ（１８、１８′）によって構成されていること
を特徴とする請求項２記載の弁及び弁開閉装置。[Claims] 1. Each cylinder is provided with a group of intake valves and a group of exhaust valves, and at least one of these valve groups is opened and closed by a single camshaft.Three valves are spaced apart in the circumferential direction. In a valve and a valve opening/closing device for an internal combustion engine having a large specific output, the three valves are formed by one central valve (2') and this central valve (2').
2') A valve and a valve opening/closing device characterized in that it is composed of two side valves (2) of smaller diameter. 2. The valve rods (6) of the two side valves (2) are parallel to each other but are inclined with respect to the valve rod (6') of the central valve (2'), (6, 6') is laterally displaced with respect to the rotational axis (10) of the camshaft (9), and in order to offset the lateral displacement of the axis 2. A valve and valve opening/closing device according to claim 1, characterized in that said means (18, 18') are provided. 3. The valve rod (6) of the side valve (2) and the central valve (2)
’) is located at the center of rotation (1) of the camshaft (9).
3. The valve and valve opening/closing device according to claim 2, wherein the valve and valve opening/closing device are arranged on both sides of the valve. 4. Said means (18, 18') are mounted on top of said valve stem with said axis displaced, and are themselves oriented transversely opposite to said axis to adjust the amount of lateral displacement of said valve stem; 3. A valve and valve opening/closing device according to claim 2, characterized in that it is constituted by guide cups (18, 18') which are displaced by the same amount. 5. A guide cup in which said means rests on top of the displaced valve stem of said axis and has a larger size than is required to offset the lateral displacement of said valve stem with respect to said camshaft (9). The valve and valve opening/closing device according to claim 2, characterized in that the valve and valve opening/closing device are constituted by (18, 18').
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT20467A/88 | 1988-05-05 | ||
| IT20467/88A IT1217503B (en) | 1988-05-05 | 1988-05-05 | VALVE SYSTEM AND RELATED CONTROLS FOR HIGH SPECIFIC POWER INTERNAL COMBUSTION ENGINE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01313607A true JPH01313607A (en) | 1989-12-19 |
Family
ID=11167387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1109270A Pending JPH01313607A (en) | 1988-05-05 | 1989-05-01 | Valve for internal combustion engine having large specific power and valve switchgear |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0340834A3 (en) |
| JP (1) | JPH01313607A (en) |
| IT (1) | IT1217503B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04219408A (en) * | 1990-03-02 | 1992-08-10 | Ferrari Spa | Timing mechaniem equipping large number of valves on cylinder, specifically for internal combustion engine |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2656898B1 (en) * | 1990-01-11 | 1992-05-15 | Peugeot | ARRANGEMENT OF VALVES IN A COMBUSTION ENGINE. |
| IT1240697B (en) * | 1990-06-19 | 1993-12-17 | Ferrari Spa | DISTRIBUTION SYSTEM, ESPECIALLY FOR AN ENDOTHERMAL ENGINE WITH MULTIPLE VALVES PER CYLINDER |
| US5094197A (en) * | 1991-03-01 | 1992-03-10 | Ferrari S.P.A. | Timing system, particularly for an internal combustion engine with a number of valves per cyclinder |
| EP0595316B1 (en) * | 1992-10-28 | 1997-04-23 | Yamaha Hatsudoki Kabushiki Kaisha | Cylinder head and valve arrangement of a multi-valve internal combustion engine |
| DE4307368A1 (en) * | 1993-03-09 | 1994-09-15 | Porsche Ag | Cylinder head for an internal combustion engine |
| JPH084505A (en) * | 1994-06-17 | 1996-01-09 | Yamaha Motor Co Ltd | Valve system for engine |
| DE19730842A1 (en) * | 1997-07-18 | 1999-01-21 | Audi Ag | IC engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07103818B2 (en) * | 1983-11-29 | 1995-11-08 | ヤマハ発動機株式会社 | 4 cycle engine piston |
| DE3669559D1 (en) * | 1986-10-02 | 1990-04-19 | Audi Ag | FOUR-STOCK COMBUSTION ENGINE. |
-
1988
- 1988-05-05 IT IT20467/88A patent/IT1217503B/en active
-
1989
- 1989-04-20 EP EP89201024A patent/EP0340834A3/en not_active Withdrawn
- 1989-05-01 JP JP1109270A patent/JPH01313607A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04219408A (en) * | 1990-03-02 | 1992-08-10 | Ferrari Spa | Timing mechaniem equipping large number of valves on cylinder, specifically for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1217503B (en) | 1990-03-22 |
| IT8820467A0 (en) | 1988-05-05 |
| EP0340834A3 (en) | 1990-01-31 |
| EP0340834A2 (en) | 1989-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0131003B2 (en) | ||
| JPS60216013A (en) | Intake valve mechanism in internal-combustion engine | |
| US4637357A (en) | Tappet arrangement for engine valve train | |
| JPH01313607A (en) | Valve for internal combustion engine having large specific power and valve switchgear | |
| JPH06173619A (en) | Valve system for four-cycle engine | |
| US5970933A (en) | Overhead-valve engine having non-parallel inlet and outlet valves | |
| MXPA02007144A (en) | Valve train for twin cam three-valve engine. | |
| JP3484498B2 (en) | 4 cycle engine | |
| JPS6149113A (en) | Valve moving device of interval-combustion engine | |
| JP2750415B2 (en) | Valve train for multi-valve engine | |
| JPS60216012A (en) | Valve drive mechanism in internal-combustion engine | |
| JPH07293214A (en) | Valve device for internal combustion engine | |
| JPS5946308A (en) | Valve timing control device of engine | |
| JPH03121207A (en) | Valve-controlled internal combusion engine | |
| JPH0754618A (en) | Multivalve type internal combustion engine | |
| JPH01134008A (en) | Valve controller for internal combustion engine | |
| JP2813709B2 (en) | Variable valve timing mechanism | |
| JP2584769Y2 (en) | OHC internal combustion engine | |
| JPS5946307A (en) | Valve timing control device of engine | |
| JPH0454043B2 (en) | ||
| JPS6149114A (en) | Valve moving mechanism of four-stroke internal-combustion engine | |
| JPH0138241Y2 (en) | ||
| JPH09303123A (en) | Variable valve timing lift mechanism | |
| JPH07116923B2 (en) | 4-cycle engine | |
| JP2581351B2 (en) | Valve train of internal combustion engine |