JPH0623526B2 - Variable valve timing mechanism - Google Patents
Variable valve timing mechanismInfo
- Publication number
- JPH0623526B2 JPH0623526B2 JP60111115A JP11111585A JPH0623526B2 JP H0623526 B2 JPH0623526 B2 JP H0623526B2 JP 60111115 A JP60111115 A JP 60111115A JP 11111585 A JP11111585 A JP 11111585A JP H0623526 B2 JPH0623526 B2 JP H0623526B2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- ring gear
- valve timing
- oil
- cam shaft
- 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.)
- Expired - Lifetime
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft
- F01L1/34406—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft the helically teethed sleeve being located in the camshaft driving pulley
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、内燃機関の運転中に、吸排気を司どるバル
ブの作動時期を変えることを可能にしたバルブタイミン
グ可変機構に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable valve timing mechanism capable of changing the operation timing of a valve that controls intake and exhaust during operation of an internal combustion engine.
従来の技術 この種のバルブタイミンウ可変機構として、内周に歯を
形成したハウジングを、内外周に形成した歯の少なくと
もいずれか一方がヘリカル歯であるリングギヤを介し
て、外周に歯を形成したカムシヤウトに装着し、リング
ギヤの軸方向にエンジンの潤滑油圧を制御油圧として作
用させてこのリングギヤを移動させることによつて、エ
ンジンによつて回転駆動されるハウジングをカムシヤフ
トに対して相対回転させてバルブの開閉作動時期を変え
るようにしたものがある（例えば米国特許第４．２３
１．３３０号）。2. Description of the Related Art As a valve timing variable mechanism of this type, a housing having teeth formed on the inner circumference is formed with teeth on the outer circumference via a ring gear in which at least one of the teeth formed on the inner circumference is a helical tooth. It is mounted on a cam shout, and the lubricating oil pressure of the engine acts as a control oil pressure in the axial direction of the ring gear to move the ring gear. There is one in which the opening and closing operation timing of the above is changed (for example, US Pat.
1.330).
発明が解決しようとする問題点 斯様な従来のバルブタイミング可変機構にあつては、ハ
ウジングを、金属製のチエーンによつてエンジンのクラ
ンクシヤフトと連繋して回転駆動しており、従つて、リ
ングギヤの移動に供する制御油のハウジング外周への洩
れはチエーンの潤滑に好ましいものであるとして、この
油洩れに格別意を要することなしに構成されていた。し
かしながら、金属製のチエーンによる駆動は少なからず
騒音の発生を招くものであり、これを解決せんとして金
属製のチエーンに替えて樹脂あるいはゴム等からなるベ
ルトを採用とすれば、前述した制御油の洩れによつてベ
ルトの早期劣化やすべり生じ易いものであつた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional valve timing variable mechanism, the housing is rotatably driven by the metal chain in communication with the crankshaft of the engine. The leakage of the control oil used for the movement to the outer periphery of the housing is preferable for the lubrication of the chain, and the oil leakage is configured without any special consideration. However, driving with a metal chain causes noise to a large extent, and if a belt made of resin or rubber is adopted instead of the metal chain as a solution to this problem, the control oil Due to the leakage, the belt is likely to be deteriorated early and slipped.
問題点を解決するための手段 そこでこの発明にあつては、制御油圧が作用するリング
ギヤの一側端側のハウジング端を密閉とする一方、リン
グギヤ他側端側のハウジング端には、カムシヤフトを軸
承するカムカバーとの間に液密封止用のシールを施すと
共に、カムシヤフトとの間に、カムカバー内に形成した
油回収孔に連通する漏油帰還通路を形成し、制御油のハ
ウジング外周への漏洩を防止してある。また、ハウジン
グは樹脂あるいはゴム等からなる可撓性を有するベルト
で回転駆動するようにしてある。Means for Solving the Problems In the present invention, therefore, the housing end on the one side end side of the ring gear on which the control hydraulic pressure acts is hermetically sealed, while the cam shaft is supported on the housing end on the other side end side of the ring gear. A liquid-tight seal is provided between the cam cover and the cam cover, and a leak oil return passage that communicates with the oil recovery hole formed in the cam cover is formed between the cam shaft and the cam shaft to prevent control oil from leaking to the outer circumference of the housing. It has been prevented. The housing is rotatably driven by a flexible belt made of resin or rubber.
作 用 エンジンによつて駆動されるハウジングを、リングギヤ
の軸方向に制御油圧を作用させてこのリングギヤを移動
させることによつて、カムシヤフトに対して相対回動さ
せ、このカムシヤフトによつて駆動される吸気または排
気バルブの開閉動作時期を可変ならしめ、この時、制御
油のハウジング外周への洩れを防止するように作用し、
また、可撓性を有するベルトによつて、駆動騒音を生ず
ることなくハウジングを回転駆動する。The housing driven by the working engine is rotated relative to the cam shaft by moving the ring gear by applying control hydraulic pressure in the axial direction of the ring gear, and the housing is driven by the cam shaft. The intake / exhaust valve opening / closing operation timing is made variable, and at this time, it acts to prevent the control oil from leaking to the outer circumference of the housing.
Further, the flexible belt drives the housing to rotate without generating drive noise.
実施例 第１図はこの発明の実施例を示す断面図である。図にお
いて１はハウジング、２はリングギヤ、３は図外の吸気
または排気バルブの開閉制御するカムシヤフトで、この
カムシヤフト３の外周には、この実施例においてカムシ
ヤフト３に一体回動可能にキー４結合した中空シヤフト
５の外周に、外歯６が形成してある。ハウジング１に
は、外周に図外のエンジンによつて駆動されプーリ１ｃ
を備え、内周に内歯７に形成してある。リングギヤ２
は、その内外周にカムシヤフト３の外歯６及びハウジン
グ１の内歯７のそれぞれに噛合する内歯８及び外歯９
を、少なくともいずれか一方がヘリカル歯として形成
し、ハウジング１をこのリングギヤ２の軸方向移動時に
カムシヤフト３に対して相対回動可能に連繋する。Embodiment FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure, 1 is a housing, 2 is a ring gear, and 3 is a cam shaft which controls opening and closing of an intake or exhaust valve (not shown). The outer periphery of the cam shaft 3 is connected to the cam shaft 3 in this embodiment by a key 4 so as to be integrally rotatable. External teeth 6 are formed on the outer periphery of the hollow shaft 5. The outer circumference of the housing 1 is driven by an engine (not shown) on the pulley 1c.
And the inner teeth 7 are formed on the inner circumference. Ring gear 2
The inner teeth 8 and the outer teeth 9 which mesh with the outer teeth 6 of the camshaft 3 and the inner teeth 7 of the housing 1 on the inner and outer circumferences thereof, respectively.
At least one of them is formed as a helical tooth, and the housing 1 is connected to the camshaft 3 so as to be rotatable relative to the camshaft 3 when the ring gear 2 is moved in the axial direction.
リングギヤ２の軸方向一側端（図中左側端）には、カム
シヤフト３に設けた油路10の後方で制御弁11によつて所
望圧力に調節し、この油路10及び中空シヤフト５をカム
シヤフト３に取付るための中空ボルト12の油路12ａを通
じて導びかれる制御油を、リングギヤ２と一体的に移動
可能なピストン13を介して作用させ、このリングギヤ２
の他側端（図中右側端）に配設して制御油圧に対向する
つり合いばね14を付勢する。ここに、制御油はエンジン
の潤滑油を使用するを可とし、この制御油圧に対向する
つり合いばね14は、これの設計の自由度を増すために、
リングギヤ２に窪み２ａを設けてこの窪み２ａ内に一端
が弾接する構成にしてある。At one end of the ring gear 2 in the axial direction (the left end in the drawing), a desired pressure is adjusted by a control valve 11 behind the oil passage 10 provided in the camshaft 3, and the oil passage 10 and the hollow shaft 5 are camshafted. The control oil guided through the oil passage 12a of the hollow bolt 12 for attaching to the ring 3 is caused to act through the piston 13 which is movable integrally with the ring gear 2, and the ring gear 2
The balance spring 14 is disposed at the other end (the right end in the figure) and opposes the control oil pressure to urge the balance spring 14. Here, it is possible to use the engine lubricating oil as the control oil, and the balance spring 14 opposed to the control oil pressure, in order to increase the degree of freedom in designing it,
The ring gear 2 is provided with a recess 2a, and one end is elastically contacted with the recess 2a.
制御油圧が作用するリングギヤ２の一側端側のハウジン
グ端１ａには、パツキン15を挾んでカバー16をボルト17
…締めし、これを密閉してある。リングギヤ２の他側端
側のハウジング端１ｂには、カムシヤフト３を軸承する
軸受18を含むカムカバー19との間にシール20による液密
封止を施す。また、このハウジング端１ｂとカムシヤフ
ト３との間に、カムカバー19内に形成した油回収孔21に
連通する漏油帰還通路22を形成してある。カムカバー19
の軸受18の内周には環状溝23を形成して制御弁11からの
制御油が導びかれる油路24と連通させ、この油路24とカ
ムシヤフト３に設けた油路10とを、カムシヤフト３の回
転中常時連通するようにしてある。また、環状溝23に導
びかれた油の一部はこの軸受18の内周軸受面に洩れ、こ
れを潤滑する。At the housing end 1a on one side of the ring gear 2 on which the control hydraulic pressure acts, the packing 16 is sandwiched and the cover 16 is bolted 17
… Tightened and sealed it. The housing end 1b on the other end side of the ring gear 2 is liquid-tightly sealed by a seal 20 with a cam cover 19 including a bearing 18 for bearing the cam shaft 3. Further, an oil leakage return passage 22 communicating with an oil recovery hole 21 formed in the cam cover 19 is formed between the housing end 1b and the cam shaft 3. Cam cover 19
An annular groove 23 is formed on the inner periphery of the bearing 18 of the above-mentioned bearing 18 so as to communicate with the oil passage 24 through which the control oil from the control valve 11 is introduced, and the oil passage 24 and the oil passage 10 provided in the camshaft 3 are connected to each other. It is designed so as to be in continuous communication during the rotation of 3. Further, part of the oil guided to the annular groove 23 leaks to the inner peripheral bearing surface of the bearing 18 and lubricates it.
25は樹脂あるいはゴム等からなる歯付ベルトで、プーリ
１ｃに巻着してこれにエンジンの回転を正しく伝える。
なお、26はこのバルブタイミング可変機構の回転部分を
覆うカバーで、回転部分の露出を防止して安全を図ると
共に、プーリ１ｃとベルト25との接触時に生じる極く僅
かな騒音をもその内部に隠蔽する。Reference numeral 25 denotes a toothed belt made of resin or rubber, which is wound around the pulley 1c and accurately transmits the rotation of the engine to this.
Reference numeral 26 is a cover for covering the rotating portion of the variable valve timing mechanism, which prevents the exposed portion of the rotating portion from being exposed for safety, and also allows a very slight noise generated when the pulley 1c and the belt 25 come into contact with each other. Hide.
斯く構成したバルブタイミング可変機構は、ベルト25を
介して駆動されるハウジング１の回転がリングギヤ２を
介してカムシヤフト３に伝わり、このカムシヤフト３が
図外の吸気または排気バルブの開閉制御を続ける途中
で、制御弁11から導びかれる制御油圧をピストン13を介
してリングギヤ２の一側端に加え、このリングギヤ２を
つり合いばねのばね力に抗して移動（図中右行）させる
ことによつてハウジング１とカムシヤフト３との回転方
向の相対位置を変え、カムシヤフト３によつて制御する
吸気または排気バルブの作動時期を変える。In the variable valve timing mechanism configured as described above, the rotation of the housing 1 driven via the belt 25 is transmitted to the cam shaft 3 via the ring gear 2, and the cam shaft 3 continues the opening / closing control of the intake or exhaust valve (not shown). By applying the control oil pressure introduced from the control valve 11 to one end of the ring gear 2 via the piston 13 and moving the ring gear 2 against the spring force of the balance spring (rightward in the figure), The relative position of the housing 1 and the camshaft 3 in the rotational direction is changed, and the operation timing of the intake or exhaust valve controlled by the camshaft 3 is changed.
このとき、制御油圧が作用するリングギヤ２の一側端側
のハウジング端１ａはカバー16によつて密閉してあるか
らこの制御油がハウジング１の外に洩れることはない。
また、リングギヤ２を押圧した制御油の一部は、このリ
ングギヤ２とハウジング１及びカムシヤフト３との噛合
隙間を潤滑するためにピストン13のハウジング１及びカ
ムシヤフト３との嵌合隙間から洩れ、シール２０側に導
かれるのであるが、上記嵌合隙間によって制御油圧は低
下し、低圧の油圧がシール２０に作用する。そして、前
記漏油は、漏油帰還通路22及び油回収孔21を介して図外
のオイルパンに戻すことができ、ハウジング１の外に洩
れることはない。At this time, since the housing end 1a on one side of the ring gear 2 on which the control oil pressure acts is sealed by the cover 16, this control oil does not leak out of the housing 1.
Further, a part of the control oil that presses the ring gear 2 leaks from the fitting gap between the housing 1 of the piston 13 and the cam shaft 3 in order to lubricate the meshing gap between the ring gear 2 and the housing 1 and the cam shaft 3, and the seal 20 Although it is guided to the side, the control oil pressure decreases due to the fitting gap, and a low oil pressure acts on the seal 20. The oil leak can be returned to the oil pan (not shown) through the oil return passage 22 and the oil recovery hole 21, and will not leak outside the housing 1.
また、ハウジング１の樹脂あるいはゴム等からなるベル
ト25に回転駆動するから、この駆動騒音を可及的に低減
可能であり、さらに、この駆動騒音は回転部分を覆うカ
バー26によつても外部に対して遮蔽できる。Further, since the belt 25 made of resin, rubber or the like of the housing 1 is rotationally driven, this driving noise can be reduced as much as possible, and the driving noise is also externally provided by the cover 26 covering the rotating portion. Can be shielded against.
なお、この実施例ではピストン13を介してリングギヤ２
に制御油圧を加える構成としたが、このピストン13はリ
ングギヤ２に一体としてもよく、同様に中空シヤフト５
はカムシヤフト３と一体としてもよい。In this embodiment, the ring gear 2 is connected via the piston 13.
Although the control oil pressure is applied to the piston 13, the piston 13 may be integrated with the ring gear 2, and similarly, the hollow shaft 5
May be integrated with the camshaft 3.
発明の効果 以上説明したようにこの発明によれば、制御油圧が作用
するリングギヤの一側端側のハウジング端を密閉とする
一方、リングギヤの他側端側のハウジング端にはカムシ
ヤフトを軸承するカムカバーとの間に液密封止用のシー
ルを施したから、ハウジングの内部は液密的に封止さ
れ、制御油のハウジングの外への漏洩が防止できる。特
に、制御油圧はハウジングとカムシャフトとの嵌合隙間
等を通り、これらの間を潤滑し、圧力を低下された状態
で、前記液密封止用のシールに掛かるので、該シールに
は比較的安価な低圧用のシールを用いることができると
共に、前記シールが接触する部分の表面粗度も、高圧用
のシールの場合のような高精度を要求されず、従ってシ
ールが接触する部分の加工が容易になる。また、前記シ
ールに掛かる圧力が弱いことから、シール摺動抵抗（シ
ールの締付力）によってバルブタイミング可変機構の応
答性が悪くなるのを防止することができる。また、リン
グギヤの他側端側のハウジング端とカムシヤフトとの間
に、カムカバーに形成した油回収孔に連通する漏油帰還
通路を形成したから、リングギヤの噛合隙間を潤滑した
漏油をハウジングの外側へ洩らすことなく回収できる。
更に、ハウジングの外側への制御油の洩れを防止できる
結果、このハウジングの駆動に樹脂あるいはゴム等から
なるベルトを使用可能となし、駆動騒音を可及的に低減
できる。As described above, according to the present invention, the housing end on one end side of the ring gear on which the control hydraulic pressure acts is hermetically sealed, while the cam cover that supports the cam shaft on the housing end on the other end side of the ring gear. Since the seal for liquid-tight sealing is provided between and, the inside of the housing is liquid-tightly sealed, and the leakage of the control oil to the outside of the housing can be prevented. In particular, the control oil pressure passes through the fitting gap between the housing and the cam shaft, lubricates the gap between them, and is applied to the liquid-tight seal in a state where the pressure is reduced. An inexpensive low-pressure seal can be used, and the surface roughness of the contact portion of the seal is not required to be as high as in the case of the high-pressure seal. It will be easier. Further, since the pressure applied to the seal is weak, it is possible to prevent the responsiveness of the variable valve timing mechanism from being deteriorated due to the seal sliding resistance (sealing force of the seal). Further, since the oil return passage communicating with the oil recovery hole formed in the cam cover is formed between the housing end on the other end side of the ring gear and the cam shaft, the oil leak that lubricates the meshing gap of the ring gear is provided outside the housing. It can be collected without leaking.
Further, since the control oil can be prevented from leaking to the outside of the housing, a belt made of resin or rubber can be used to drive the housing, and drive noise can be reduced as much as possible.
第１図はこの発明の一実施例を示す断面図である。 １……ハウジング、１ａ，１ｂ……ハウジング端、１ｃ
……プーリ、２……リングギヤ、３……カムシヤフト、
14……つり合いばね、１６……カバー、19……カムカバ
ー、20……シール、21……油回収孔、22……漏油帰還通
路、25……ベルト。FIG. 1 is a sectional view showing an embodiment of the present invention. 1 ... Housing, 1a, 1b ... Housing end, 1c
...... Pulley, 2 ... Ring gear, 3 ... Camshaft,
14 …… Balance spring, 16 …… Cover, 19 …… Cam cover, 20 …… Seal, 21 …… Oil recovery hole, 22 …… Oil leakage return passage, 25 …… Belt.
Claims (2)
を備えたハウジングを、内外周に創成した歯の少なくと
もいずれか一方がヘリカル歯であるリングギャを介して
カムシャフトに連繋して、このリングギャの軸方向移動
でカムシャフトに対して相対回動可能となし、このリン
グギャの軸方向一側端は制御油圧を加えてこれに対向す
る他側端に配設したつり合いばねを付勢してなるバルブ
タイミング可変機構において、前記制御油圧が作用する
リングギャ一側端側のハウジング端を密閉とする一方、
リングギャ他側端側のハウジング端には、カムシャフト
を軸承するカムカバーとの間に液密封止用のシールを施
すと共に、カムシャフトとの間に、カムカバー内に形成
した油回収孔に連通する漏油帰還通路を形成し、制御油
のハウジング外周への漏洩を防止したことを特徴とする
バルブタイミング可変機構。Claim: What is claimed is: 1. A housing provided with a pulley driven by an engine on the outer circumference, is connected to a camshaft via a ring gear having at least one of the teeth formed on the inner and outer circumferences being helical teeth, and the shaft of the ring gear is connected. The valve timing is such that it can rotate relative to the cam shaft by directional movement, and one axial end of this ring gear applies a control hydraulic pressure to urge a balancing spring arranged at the other end opposite to this valve timing. In the variable mechanism, while closing the housing end on the ring gear side end side on which the control hydraulic pressure acts,
The housing end on the other end side of the ring gear is provided with a seal for liquid-tight sealing with the cam cover that supports the cam shaft, and at the same time with the cam shaft, there is a leakage that communicates with the oil recovery hole formed in the cam cover. A variable valve timing mechanism characterized in that an oil return passage is formed to prevent control oil from leaking to the outer periphery of the housing.
よって回転駆動されてなる特許請求の範囲第１項記載の
バルブタイミング可変機構。2. The variable valve timing mechanism according to claim 1, wherein the housing is rotationally driven by a belt having flexibility.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60111115A JPH0623526B2 (en) | 1985-05-22 | 1985-05-22 | Variable valve timing mechanism |
| US07/866,054 US4811698A (en) | 1985-05-22 | 1986-05-21 | Valve timing adjusting mechanism for internal combustion engine for adjusting timing of intake valve and/or exhaust valve corresponding to engine operating conditions |
| DE3645157A DE3645157C3 (en) | 1985-05-22 | 1986-05-22 | Valve setting for an internal combustion engine |
| DE19863617140 DE3617140A1 (en) | 1985-05-22 | 1986-05-22 | VALVE TIME ADJUSTMENT MECHANISM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60111115A JPH0623526B2 (en) | 1985-05-22 | 1985-05-22 | Variable valve timing mechanism |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7068059A Division JP2895412B2 (en) | 1995-03-27 | 1995-03-27 | Variable valve timing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61268810A JPS61268810A (en) | 1986-11-28 |
| JPH0623526B2 true JPH0623526B2 (en) | 1994-03-30 |
Family
ID=14552793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60111115A Expired - Lifetime JPH0623526B2 (en) | 1985-05-22 | 1985-05-22 | Variable valve timing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623526B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4967701A (en) * | 1989-01-12 | 1990-11-06 | Nippondenso Co., Ltd. | Valve timing adjuster |
| US5507254A (en) * | 1989-01-13 | 1996-04-16 | Melchior; Jean F. | Variable phase coupling for the transmission of alternating torques |
| FR2641832B1 (en) * | 1989-01-13 | 1991-04-12 | Melchior Jean | COUPLING FOR TRANSMISSION OF ALTERNATE COUPLES |
| JPH03246309A (en) * | 1990-02-26 | 1991-11-01 | Mitsubishi Motors Corp | Variable valve system |
| JPH03110109U (en) * | 1990-02-26 | 1991-11-12 | ||
| JP2536250B2 (en) * | 1990-07-20 | 1996-09-18 | トヨタ自動車株式会社 | Variable valve timing mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55110704U (en) * | 1979-01-26 | 1980-08-04 | ||
| DE3247916A1 (en) * | 1982-12-24 | 1984-06-28 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR CONTROLLING THE VALVES OF AN INTERNAL COMBUSTION ENGINE OVER A CAMSHAFT |
-
1985
- 1985-05-22 JP JP60111115A patent/JPH0623526B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 実願昭５４−８３００号（実開昭５５−１１０７０４号）の願書に添付した明細書及び図面の内容を撮影したマイクロフィルム |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61268810A (en) | 1986-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |