JPS59115410A - Valve operation switching device of internal-combustion engine - Google Patents
Valve operation switching device of internal-combustion engineInfo
- Publication number
- JPS59115410A JPS59115410A JP23120282A JP23120282A JPS59115410A JP S59115410 A JPS59115410 A JP S59115410A JP 23120282 A JP23120282 A JP 23120282A JP 23120282 A JP23120282 A JP 23120282A JP S59115410 A JPS59115410 A JP S59115410A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- valve
- locker
- combustion engine
- valve operation
- 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
Classifications
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
-
- 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
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、内燃機関の吸、排気弁の作動切換装置に関
し、例えば軽負荷域等で一部気筒の作動を休止させ部分
気筒運転を行なう気筒数制御エンジン等に適用されるも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation switching device for intake and exhaust valves of an internal combustion engine, and is applied to, for example, a cylinder number control engine that performs partial cylinder operation by suspending operation of some cylinders in a light load range, etc. It is something that will be done.
多気筒内燃機関において、エンジン負荷の小さいときに
一部気′節への燃料の供給を遮断してその作動を休止さ
せ、この分だけ残りの稼動側気筒の負荷を高めて軽負荷
領域での燃費を改善するようにした気筒数制御エンジン
が知られているが、この一部気筒への燃料供給を遮断す
るときに、例えば第１図に示すように、尚該気筒の吸気
弁１ならびに排気弁２の作動状態を切換え、吸、排気作
用を規制するものが提案されている（実開昭５２−１２
４３０７号等参照）。In a multi-cylinder internal combustion engine, when the engine load is light, the fuel supply to some of the cylinders is cut off to stop their operation, and the load on the remaining active cylinders is increased by that amount to increase the load in the light load range. Engines that control the number of cylinders to improve fuel efficiency are known, but when cutting off the fuel supply to some cylinders, for example, as shown in FIG. It has been proposed to change the operating state of the valve 2 and regulate the suction and exhaust actions (Utility Model Application No. 52-12).
4307 etc.).
図において、３は吸気弁１側のロッカアーム、４は排気
弁２側のロッカアーム、５はロッカシャフト、６はカム
シャフトを示し、このカムシャフト６には、吸気弁１月
の一対のカム７．８と、排気弁２用の一対のカム９，１
０とがそれぞれ隣接して形成されている。In the figure, 3 is a rocker arm on the intake valve 1 side, 4 is a rocker arm on the exhaust valve 2 side, 5 is a rocker shaft, and 6 is a camshaft.This camshaft 6 has a pair of cams 7. 8, and a pair of cams 9, 1 for the exhaust valve 2.
0 are formed adjacent to each other.
このうち、第１のカム７．９はそれぞれ通常の吸、排気
行程でロッカアーム３，４を介して吸、排気弁１，２を
開閉させる所定のプロフィールに形成され、第２のカム
８，１０は第１のカム７゜９のペースサークルと同径の
真円形に形成されている。Among these, the first cam 7.9 is formed in a predetermined profile to open and close the intake and exhaust valves 1, 2 via the rocker arms 3, 4 during normal intake and exhaust strokes, and the second cam 8, 10 is formed into a perfect circle with the same diameter as the pace circle of the first cam 7°9.
また、ロッカアーム３，４は、ロッカシャフト５に対し
て揺動可能なだけでなく、その軸方向にも移動するよう
に支持されておシ、ロッカシャフト５のブラケット１１
．１２とカラー１３．１４とで画成された圧力室１５．
１６に、ポンプ１７からの圧油が方向切換弁１８を介し
て選択的に導入されると、左右に位置を変える。Further, the rocker arms 3 and 4 are not only swingable relative to the rocker shaft 5 but also supported so as to move in the axial direction thereof.
．． 12 and a pressure chamber 15. defined by a collar 13.14.
16, when pressure oil from the pump 17 is selectively introduced via the directional control valve 18, the position changes from side to side.
そして、この方向切換弁１８は、制御回路１９の信号に
より切換えられる電磁弁２０からのパイロット油圧によ
って駆動制御され、通常時は圧力室１６に圧油を導いて
ロッカアーム３，４を第１のカム７．９側に位置させる
一方、アクセルセンサ２１からの負荷信号に基づくエン
ジンの軽負荷域等では圧力室１５に圧油を導いてロッカ
アーム３．４を第２のカム８，１０へと移動させる。This directional control valve 18 is driven and controlled by pilot oil pressure from a solenoid valve 20 which is switched by a signal from a control circuit 19. Normally, pressure oil is guided into the pressure chamber 16 to move the rocker arms 3 and 4 to the first cam. 7.9 side, while in a light load range of the engine based on the load signal from the accelerator sensor 21, pressure oil is guided to the pressure chamber 15 and the rocker arm 3.4 is moved to the second cam 8, 10. .
これによシ、エンジン負荷の小さいときに、一部気筒の
吸、排気弁１，２の作動を切換えてその作動を休止させ
、他の稼動側気筒のみの作動による部分気筒運転を行な
っている。この部分気筒運転時に、休止側の気筒内に吸
気が閉じ込められ、圧縮、膨張を繰り返すから、燃費が
改善されるだけでなく、トルク変動や回転変動が低く抑
えられる。With this, when the engine load is small, the operation of intake and exhaust valves 1 and 2 of some cylinders is switched and their operation is stopped, and partial cylinder operation is performed by operating only the other operating cylinders. . During this partial cylinder operation, intake air is trapped in the cylinder on the idle side and is repeatedly compressed and expanded, which not only improves fuel efficiency but also suppresses torque fluctuations and rotational fluctuations.
なお、２２はスペーサ、２３はパイロット油圧供給用の
アキュームレータ、２４はリリーフ弁、２５は方向切換
弁１８のクランプ装置で、吸、排気弁１，２の作動を切
換えるとき、制御回路１９からの信号によって電磁アク
チュエータ２６が駆動されると、ストッパ２７が方向切
換弁１８のスプール２８端部外周に形成した溝部２９．
３０からはずれ、切換時以外ではストッパ２７が溝部２
９゜３０に係合してスプール２８を固定し、位置がずれ
ないようにしている。In addition, 22 is a spacer, 23 is an accumulator for pilot oil pressure supply, 24 is a relief valve, and 25 is a clamp device for the directional switching valve 18. When switching the operation of the intake and exhaust valves 1 and 2, a signal from the control circuit 19 is used. When the electromagnetic actuator 26 is driven by the stopper 27 , the groove 29 .
30, and the stopper 27 is in the groove 2 except when switching.
9° 30 to fix the spool 28 and prevent it from shifting.
しかしながら、このような従来装置にあっては、油圧に
より同時にロッカアーム３，４を移動して各牧、排気弁
１，２の作動を切換えるようになっているため、その切
換タイミングによっては、ロッカアーム３，４の移動が
カム７．９によるリフト時期と重なってしまうことがあ
る。However, in such a conventional device, the rocker arms 3 and 4 are simultaneously moved by hydraulic pressure to switch the operation of the exhaust valves 1 and 2, so depending on the switching timing, the rocker arms 3 and 4 may be moved at the same time. , 4 may overlap with the lift timing by the cam 7.9.
例えば、４気筒エンジンの＄２ 、 ＄−３気筒に従来
装置を適用した場合、その吸、排気弁１，２の通常時の
開時性は第２図の（ａ）に示すようになっており（実線
部分）、第２図の（ｂ） ｊ （ｃ）に示すように通常
運転から部分気筒運転に移行しようとして、あるクラン
ク角度（例えばＢＤＣ）のときに方向切換弁１８を切換
えると、＃２気筒ではロッカアーム３．４がスムーズに
移動するが、＃３気筒ではカム７．９のリフトによって
ロッカアーム３゜４が移動中に押し上げられる。ただし
、第２図の（ｂ）はポンプ１７の動作特性を示している
。For example, when the conventional device is applied to the $2 and $-3 cylinders of a four-cylinder engine, the normal opening characteristics of the intake and exhaust valves 1 and 2 are as shown in Fig. 2 (a). As shown in (b) and (c) of Fig. 2, when the directional control valve 18 is switched at a certain crank angle (for example, BDC) in an attempt to shift from normal operation to partial cylinder operation, as shown in (b) and (c) of Fig. 2, In the #2 cylinder, the rocker arm 3.4 moves smoothly, but in the #3 cylinder, the rocker arm 3.4 is pushed up during movement by the lift of the cam 7.9. However, FIG. 2(b) shows the operating characteristics of the pump 17.
このため、ロッカアーム３，４とカム７．９との接触部
に過大な摩優力が生じ、傷ついたり破損しかねないとい
う問題があった。For this reason, there is a problem in that an excessive friction force is generated at the contact portion between the rocker arms 3, 4 and the cam 7.9, which may cause damage or damage.
この発明は、このような問題点に着目して彦されたもの
で、方向切換弁からの圧油をロッカアームの各圧力室に
導く通路の途中に、所定のカム角（クランク角）のとき
に開く弁を設け、カムのリフト時期をはずしてロッカア
ームを移動させるよう構成することにより、上記問題点
を解決することを目的とする。This invention was developed in view of these problems, and includes a passage that guides pressure oil from the directional control valve to each pressure chamber of the rocker arm at a predetermined cam angle (crank angle). It is an object of the present invention to solve the above-mentioned problems by providing a valve that opens and configuring the rocker arm to be moved at different times when the cam is lifted.
以下、本発明の実施例を図面に基づいて説明する。Embodiments of the present invention will be described below based on the drawings.
第３図において、３は吸気弁１側のロッカアーム、４は
排気弁２側のロッカアーム、５はロッカシャフト、６は
各ロッカアーム３，４に対応してそれぞれプロフィール
の異なる第１と第２のカム７〜１０とが形成されたカム
シャフトで、ロッカアーム３，４の両側にはロッカシャ
フト５のブラケット１１．１２とカラー１３．１４とで
圧力室１５．１６が形成されている。In FIG. 3, 3 is a rocker arm on the intake valve 1 side, 4 is a rocker arm on the exhaust valve 2 side, 5 is a rocker shaft, and 6 is a first and second cam with different profiles corresponding to the rocker arms 3 and 4, respectively. A pressure chamber 15.16 is formed on both sides of the rocker arms 3 and 4 by the bracket 11.12 of the rocker shaft 5 and the collar 13.14.
そして、この圧力室１５．１６に、ポンプ１７からの圧
油が方向切換弁１８を介して選択的に導入されると、ロ
ッカアーム３，４は左右に移動し第１のカム７．９から
第２のカム８，１０あるいは第２のカム８，１０から第
１のカム７．９へと乗り移るが、この方向切換９ｆ１８
から圧力室１５に圧油を導く油圧通路３１の途中に、そ
れぞれ所定のカム角のときに開く開閉弁３２．３３が設
置される。When pressure oil from the pump 17 is selectively introduced into this pressure chamber 15.16 via the directional control valve 18, the rocker arms 3 and 4 move left and right, and the first cam 7. The second cam 8, 10 or the second cam 8, 10 transfers to the first cam 7.9, but this direction switching 9f18
On-off valves 32 and 33, which open at predetermined cam angles, are installed in the middle of the hydraulic passage 31 that guides pressure oil from the cam to the pressure chamber 15.
この開閉弁３２．３３は、弁ハウジング３４内を摺動し
油圧通路３１を開閉する弁体３５と、弁体３５を閉じ方
向に付勢するリターンスプリング３６と、弁体３５を連
結し軸方向に開閉駆動するタペット状のロッド３７とか
らなり、ロッド３７の先端部がハウソング３４を貫通し
外部に突出するように形成される。The on-off valves 32 and 33 connect a valve body 35 that slides within the valve housing 34 to open and close the hydraulic passage 31, a return spring 36 that biases the valve body 35 in the closing direction, and a valve body 35 that connects the valve body 35 in the axial direction. It consists of a tappet-shaped rod 37 that is driven to open and close, and the tip of the rod 37 is formed so as to penetrate through the housing song 34 and protrude to the outside.
そして、このロッド３７の先端部に係合して、前記カム
シャフト６と１対１で同期回転する回動カム３８．３９
が配設され、そのプロフィールに応じて弁３２．３３を
開閉する。Rotating cams 38 and 39 engage with the tip of this rod 37 and rotate in synchronization with the camshaft 6 one to one.
is arranged and opens and closes the valves 32,33 depending on its profile.
この回動カム３８．３９による開閉弁３２ 、３３の開
時期は、それぞれ対応する吸、排気弁１，２のリフト時
期を除き、即ち対応する気筒の例えば王権行程時や膨張
行程時となるように、前記カムシャフト６のカム角に対
してカムプロフィールが設定される。The opening timings of the on-off valves 32 and 33 by the rotary cams 38 and 39 are set such that the opening timings of the on-off valves 32 and 33 are set at times other than the lift timings of the corresponding intake and exhaust valves 1 and 2, such as during the kingship stroke or expansion stroke of the corresponding cylinder. A cam profile is set for the cam angle of the camshaft 6.
これにより、吸、排気弁１，２の作動切換時に、カム７
．９によるリフト時期をはずして圧力室１５に圧油を導
き、ロッカアーム３，４を移動させるのである。As a result, when switching the operation of the intake and exhaust valves 1 and 2, the cam 7
．． 9 is removed, pressure oil is introduced into the pressure chamber 15, and the rocker arms 3 and 4 are moved.
なお、前記回動カム３８．３９をカムシャフト６に一体
的に形成してもよい。その他の構成について第１図と同
一の部分に同符号を付すことにする。Note that the rotating cams 38 and 39 may be formed integrally with the camshaft 6. Regarding other configurations, the same parts as in FIG. 1 are given the same reference numerals.
このような構成において、アクセルセンサ２１からの信
号に基づくエンジンの軽負荷域等で、電磁弁２０に応動
して方向切換弁１８が切換えられると、ポンプ１７から
の圧油が油圧通路３１途中の開閉弁３２．３３に供給さ
れる。In such a configuration, when the directional control valve 18 is switched in response to the solenoid valve 20 in a light load range of the engine based on a signal from the accelerator sensor 21, the pressure oil from the pump 17 flows into the middle of the hydraulic passage 31. It is supplied to on-off valves 32 and 33.
そして、このときロッカアーム３，４の一端の圧力室１
６が方向切換弁１８を介してタンク戻し側へ開放される
と共に、対応気筒の圧縮行程あるいは膨張行程に入ると
、回動カム３Ｂ、３９によって開閉弁３２．３３が開か
れ、圧力室１５に圧油が導入される。At this time, the pressure chamber 1 at one end of the rocker arms 3 and 4
6 is opened to the tank return side via the directional switching valve 18, and when the corresponding cylinder enters the compression stroke or expansion stroke, the on-off valves 32 and 33 are opened by the rotary cams 3B and 39, and the pressure chamber 15 is opened. Pressure oil is introduced.
このため、ロッカアーム３，４は、カム７．９により押
し上げられることなくスムーズにカム８゜ｉｏ側へと移
動し、各吸、排気弁１，２の作動が切換えられる（第２
図の（ｅ）参照）。Therefore, the rocker arms 3 and 4 smoothly move toward the cam 8° io side without being pushed up by the cam 7.9, and the operation of each intake and exhaust valve 1 and 2 is switched (second
(See figure (e)).
また、ロッカアーム３，４をカム７．９側へと戻すとき
は、方向切換弁１８を介して圧力室１６に圧油が導入さ
れるが、このとき開閉弁３２，３３が開かれるまで対応
する圧力室１５に前回導入された圧油が閉じ込められる
。Furthermore, when the rocker arms 3, 4 are returned to the cam 7.9 side, pressure oil is introduced into the pressure chamber 16 via the directional control valve 18, but at this time, the pressure oil is not supplied until the on-off valves 32, 33 are opened. The pressure oil previously introduced into the pressure chamber 15 is trapped.
そして、開閉弁３２．３３は対応気筒の圧縮行程、膨張
行程時に開かれ、圧力室１５の圧油を開放する。The on-off valves 32 and 33 are opened during the compression stroke and expansion stroke of the corresponding cylinder to release the pressure oil in the pressure chamber 15.
したがって、ロッカアーム３，４はカム７．９のリフト
時期とぶつかることなく、スムーズにカム７．９へと乗
り移るのである。Therefore, the rocker arms 3 and 4 smoothly transfer to the cam 7.9 without conflicting with the lift timing of the cam 7.9.
このようにしたので、吸、排気弁１，２の作動切換時に
、従来例のようにロッカアーム３，４の移動とカム７．
９によるリフトとが重なって、これらを傷つけたり破損
するようなことは防止され、良好かつ安定した切換動作
が得られると共に、耐久性を向上することができる。With this arrangement, when switching the operation of the intake and exhaust valves 1 and 2, the rocker arms 3 and 4 move and the cam 7.
It is possible to prevent these from being damaged or damaged due to overlap with the lift by 9, so that a good and stable switching operation can be obtained and durability can be improved.
また、開閉弁３２，３３を設けたことにより、方向切換
弁１８の切換えタイミングが任意に設定でき、制御が極
めて容易となる。Moreover, by providing the on-off valves 32 and 33, the switching timing of the directional switching valve 18 can be set arbitrarily, making control extremely easy.
そして、ロッカアーム３，４やカム７．９の損傷の心配
がないから、油圧等を高めてロッカアーム３，４の移動
速度を大きくすることができ、エンジン回転数の高いと
きにも的確に吸、排気弁１゜２の作動切換を行なうこと
ができる。Since there is no fear of damage to the rocker arms 3, 4 or the cam 7.9, the movement speed of the rocker arms 3, 4 can be increased by increasing the hydraulic pressure, etc., and the suction can be performed accurately even when the engine speed is high. The operation of the exhaust valves 1 and 2 can be switched.
なお、本実施例は、吸、排気弁１，２に対応するロッカ
アーム３，４を別々に動かす場合、あるいは各気筒に対
応するロッカアーム３，４が別々に動かされる場合であ
ってもこれに応じて開閉弁３２．３３を設ければ良く、
容易に適用される。Furthermore, in this embodiment, even when the rocker arms 3 and 4 corresponding to the intake and exhaust valves 1 and 2 are moved separately, or when the rocker arms 3 and 4 corresponding to each cylinder are moved separately, the present embodiment can be adjusted accordingly. It is sufficient to provide on-off valves 32 and 33,
Easily applied.
第４図は本発明の他の実施例で、油圧通路３１の開閉弁
に、スプール４０の回動に応じて開閉される弁４１．４
２を設けたものである。FIG. 4 shows another embodiment of the present invention, in which a valve 41.4 is provided as an on-off valve of the hydraulic passage 31 and is opened and closed in response to rotation of the spool 40.
2.
この場合、スプール４０の外周に２つの１１ぼ半周する
鍔４３，４４が形成され、それぞれに対向して弁ハウジ
ング４５に各油圧通路３１と接続するポート４６．４７
が設けられる。In this case, two flanges 43 and 44 are formed on the outer periphery of the spool 40 and have a circumference of about 11 and a half, and ports 46 and 47 that face each other and connect to each hydraulic passage 31 in the valve housing 45 are formed.
is provided.
そして、スプール４０はカムシャフト６と１対１で同期
回転するように連結され、各対応する気筒の圧縮行程時
から膨張行程時に弁４１．４２が開くように、溝４３，
４４およびボー）４６．４７の位置が設定される。The spool 40 is connected to the camshaft 6 so as to rotate in one-to-one synchronization, and the grooves 43,
44 and baud) 46.47 positions are set.
これによれば、開閉弁４１．４２の構造が簡単になると
共に、開閉時の圧力変動を低減することができる。なお
、第５図に示すように、スプール４８の中央部に溝４９
とつながる通路５０を形成し、その回転に応じて害４９
が各ポート５１ 、５２と適時連通するような開閉弁５
３であっても良い。According to this, the structure of the on-off valves 41 and 42 becomes simple, and pressure fluctuations at the time of opening and closing can be reduced. Note that, as shown in FIG. 5, a groove 49 is formed in the center of the spool 48.
form a passage 50 connected to the
The on-off valve 5 communicates with each port 51, 52 in a timely manner.
It may be 3.
以上説明した通り、本発明によれば、方向切換弁からの
圧油をロッカアームの各圧力室に導く油圧通路の途中に
、所定のカム角のときに開く開閉弁を設け、カムのリフ
ト時期以外のときにロッカアームを移動させるようにし
たので、ロッカアームやカム等が損傷することなく、的
確に吸、排気弁の作動を切換えることができ、信頼性が
向上するという効米がある。As explained above, according to the present invention, an on-off valve that opens when the cam angle is a predetermined cam angle is provided in the middle of the hydraulic passage that leads pressure oil from the directional control valve to each pressure chamber of the rocker arm. Since the rocker arm is moved at the same time, the operation of the intake and exhaust valves can be switched accurately without damaging the rocker arm, cam, etc., which has the advantage of improving reliability.
第１図は従来装置の構成断面図、第２図の（ａ）。
（ｂ） 、 （ｃ）は吸、排気弁の作動切換時の各動作
特性図、第３図は本発明の実施例を示す構成断面図、第
４図、第５図はそれぞれ本発明の他の実施例を示す構成
断面図である。
１・・・吸気弁、２・・・排気弁、３，４・・・ロッカ
アーム、５・・・ロッカシャフト、６・・・カムシャフ
ト、７〜１０・・・カム、１１．１２・・・ブラケット
、１３゜１４・・・カラー、１５．１６・・・圧力室、
１７・・・ポンプ、１８・・・方向切換弁、１９・・・
制御回路、２１・・・アクセルセンサ、３１・・・油圧
通路、３２．３３・・・開閉弁、３８．３９・・・回動
カム、４１，４２・・・開閉弁、５３・・・開閉弁。
特許出願人 日産自動車株式会社FIG. 1 is a cross-sectional view of the configuration of a conventional device, and FIG. 2 (a). (b) and (c) are respective operation characteristic diagrams when switching the operation of the intake and exhaust valves, FIG. 3 is a cross-sectional view of the configuration showing an embodiment of the present invention, and FIGS. FIG. 2 is a configuration cross-sectional view showing an example. DESCRIPTION OF SYMBOLS 1... Intake valve, 2... Exhaust valve, 3, 4... Rocker arm, 5... Rocker shaft, 6... Camshaft, 7-10... Cam, 11.12... Bracket, 13゜14... Collar, 15.16... Pressure chamber,
17... Pump, 18... Directional switching valve, 19...
Control circuit, 21... Accelerator sensor, 31... Hydraulic passage, 32.33... Open/close valve, 38.39... Rotating cam, 41, 42... Open/close valve, 53... Open/close valve. Patent applicant Nissan Motor Co., Ltd.
Claims (1)
方向に移動させて、カムシャフトの軸方向に並設したプ
ロフィールの異なる一対のカムのいずれか一部と通釈的
に保合させることにより、このロッカアームを介して駆
動される吸、排気弁の弁作動を切換えるようにした内燃
機関の弁作動切換装置において、ロッカアームのＩＩ＋
１１１１Ｉｌｌに圧力室を形成し、この両圧力室に油圧
通路を介してポンプからの圧油を辿択的に尋人する方向
切換弁と、この油圧通路を所定カム角のときに開く開閉
弁とを設けたことを特徴とする内燃機関の弁作動切換装
置。By moving the rocker arm in the axial direction of the rocker shaft according to the Isoseki driving conditions, and making it connect with one part of a pair of cams with different profiles arranged in parallel in the axial direction of the camshaft, In the valve operation switching device for an internal combustion engine that switches the valve operation of intake and exhaust valves driven via the rocker arm, the rocker arm II+
A pressure chamber is formed in the 1111Ill, and a directional switching valve that selectively supplies pressure oil from the pump through a hydraulic passage to both pressure chambers, and an on-off valve that opens this hydraulic passage at a predetermined cam angle. A valve operation switching device for an internal combustion engine, characterized in that it is provided with a valve operation switching device for an internal combustion engine.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23120282A JPS59115410A (en) | 1982-12-23 | 1982-12-23 | Valve operation switching device of internal-combustion engine |
| US06/552,832 US4534323A (en) | 1982-12-23 | 1983-11-17 | Valve operation changing system of internal combustion engine |
| DE19833346556 DE3346556A1 (en) | 1982-12-23 | 1983-12-22 | VALVE CONTROL INTERCHANGEABLE DEVICE FOR INTERNAL COMBUSTION ENGINES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23120282A JPS59115410A (en) | 1982-12-23 | 1982-12-23 | Valve operation switching device of internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59115410A true JPS59115410A (en) | 1984-07-03 |
| JPH0347406B2 JPH0347406B2 (en) | 1991-07-19 |
Family
ID=16919937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23120282A Granted JPS59115410A (en) | 1982-12-23 | 1982-12-23 | Valve operation switching device of internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59115410A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015172354A (en) * | 2014-03-12 | 2015-10-01 | いすゞ自動車株式会社 | Cam switch |
| CN112065527A (en) * | 2020-09-11 | 2020-12-11 | 潍柴动力股份有限公司 | Control oil way structure, rocker shaft assembly and engine assembly |
-
1982
- 1982-12-23 JP JP23120282A patent/JPS59115410A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015172354A (en) * | 2014-03-12 | 2015-10-01 | いすゞ自動車株式会社 | Cam switch |
| CN112065527A (en) * | 2020-09-11 | 2020-12-11 | 潍柴动力股份有限公司 | Control oil way structure, rocker shaft assembly and engine assembly |
| CN112065527B (en) * | 2020-09-11 | 2021-11-19 | 潍柴动力股份有限公司 | Control oil way structure, rocker shaft assembly and engine assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0347406B2 (en) | 1991-07-19 |
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