JP2528407B2 - Toothed belt cooling system - Google Patents
Toothed belt cooling systemInfo
- Publication number
- JP2528407B2 JP2528407B2 JP3310869A JP31086991A JP2528407B2 JP 2528407 B2 JP2528407 B2 JP 2528407B2 JP 3310869 A JP3310869 A JP 3310869A JP 31086991 A JP31086991 A JP 31086991A JP 2528407 B2 JP2528407 B2 JP 2528407B2
- Authority
- JP
- Japan
- Prior art keywords
- case
- cooling
- toothed belt
- toothed
- supply port
- 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
- F01L1/02—Valve drive
- F01L1/024—Belt drive
-
- 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
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、自動車用エンジンの
動弁系駆動機構において、歯付きベルトの短命化を阻止
ならしめる歯付きベルトの冷却装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothed belt cooling device for preventing the life of the toothed belt in a valve train drive mechanism of an automobile engine.
【０００２】[0002]
【従来の技術】自動車のエンジンでは、クランク軸の端
部に設けた歯付きプーリと、カム軸の端部に設けた歯付
きプーリと、前記歯付きプーリ相互間に張設された歯付
きベルトとから成る動弁系駆動機構を具備させてあり、
これにより、ピストンの昇降タイミングと吸・排気弁の
開閉タイミングを同期させている。2. Description of the Related Art In an automobile engine, a toothed pulley provided at an end of a crankshaft, a toothed pulley provided at an end of a camshaft, and a toothed belt stretched between the toothed pulleys. And a valve drive system consisting of
As a result, the lifting timing of the piston and the opening / closing timing of the intake / exhaust valve are synchronized.
【０００３】上記した動弁系駆動機構は、シリンダや吸
・排気弁からなるエンジン主体と区画壁を介して設けら
れており、前記区画壁にカバーを取付けるようにして
（以下、区画壁とカバーにより構成されたものを単にケ
ースという）動弁系駆動機構を包囲してある。ところ
が、上記したケースのシール性が高い場合にはその内部
に熱がこもり、歯付きベルトの背ゴムが硬化して寿命が
短くなってしまう。この現象の発生は、ケース内の温度
が非常に上昇する夏場において顕著である。逆に、ケー
スのシール性が充分ではない場合には、少しは熱が外部
に逃げるものの、豪雨、悪路又は乾燥状態での走行の際
には、ケース内の回転気流によってカバー内に泥水や異
物が巻き込まれてベルトの寿命が短くなってしまう。The above-mentioned valve train driving mechanism is provided via an engine main body composed of cylinders and intake / exhaust valves and a partition wall, and a cover is attached to the partition wall (hereinafter, partition wall and cover). The valve drive system is surrounded by a valve drive system. However, when the case has a high sealing property, heat is accumulated inside the case, and the back rubber of the toothed belt is hardened to shorten the life. The occurrence of this phenomenon is remarkable in the summer when the temperature inside the case rises extremely. On the other hand, if the case does not have sufficient sealing performance, some heat will escape to the outside, but during heavy rain, rough roads, or dry conditions, the rotating airflow inside the case may cause muddy water or dust in the cover. The life of the belt will be shortened due to the inclusion of foreign matter.
【０００４】[0004]
【発明が解決しようとする課題】そこで、この発明で
は、ケース外部近傍が悪条件であっても、自動車エンジ
ンの動弁駆動機構における歯付きベルトの短命化が阻止
できる歯付きベルトの冷却装置を提供することを課題と
する。Therefore, according to the present invention, even if the condition near the outside of the case is adverse,
Prevents shortened life of toothed belt in valve drive mechanism
An object of the present invention is to provide a cooling device for a toothed belt that can be used .
【０００５】[0005]
【課題を解決するための手段】この請求項１記載の発明
は、自動車用エンジンに備え付けられたものであって、
クランク軸の端部に設けた歯付きプーリと、カム軸の端
部に設けた歯付きプーリと、前記歯付きプーリ相互間に
張設された歯付きベルトとから構成された動弁系駆動機
構をケース内に収容させて成る装置において、自動車に
具備させた冷暖房用ファンから圧送された冷却空気をケ
ース内に導く供給口をケースに設けると共に前記供給口
への冷却空気量よりも少ない量の冷却空気をケース外に
逃がす排気口をケースに設けている。The invention according to claim 1 is provided in an automobile engine,
A valve train drive mechanism including a toothed pulley provided at the end of the crankshaft, a toothed pulley provided at the end of the camshaft, and a toothed belt stretched between the toothed pulleys. In a case, a supply port for guiding the cooling air pressure-fed from the cooling / heating fan provided in the automobile into the case is provided in the case, and the amount of cooling air to the supply port is less than the amount. An exhaust port is provided in the case to let the cooling air escape to the outside of the case.
【０００６】請求項２記載の発明は、自動車用エンジン
に備え付けられたものであって、クランク軸の端部に設
けた歯付きプーリと、カム軸の端部に設けた歯付きプー
リと、前記歯付きプーリ相互間に張設された歯付きベル
トとから構成された動弁系駆動機構をケース内に収容さ
せて成る装置において、自動車に具備させた冷暖房用フ
ァンから圧送された冷却空気をケース内に導く供給口を
ケースに設けると共に前記冷却空気をケース外に逃がす
排気口をケースに設け、前記供給口の有効開口面積を排
気口のそれよりも大きく設定している。According to a second aspect of the present invention, which is provided in an automobile engine, a toothed pulley provided at an end of a crankshaft, a toothed pulley provided at an end of a camshaft, and In a device in which a case is provided with a valve train drive mechanism composed of a toothed belt stretched between toothed pulleys , cooling air pressure-fed from a cooling / heating fan provided in an automobile is used as a case. A supply port for guiding the inside is provided in the case and an exhaust port for allowing the cooling air to escape to the case is provided in the case, and an effective opening area of the supply port is set larger than that of the exhaust port.
【０００７】請求項３記載の発明では、上記請求項１又
は２記載の発明に関して、供給口の配置をケースの上部
とし、排気口の配置をケースの下部としている。According to a third aspect of the present invention, with respect to the first or second aspect of the invention, the arrangement of the supply port is the upper part of the case and the arrangement of the exhaust port is the lower part of the case.
【０００８】[0008]
【作用】この出願の発明は次の作用を有する。 （請求項１記載の発明の作用） 冷暖房用ファンからケースに導かれる冷却空気の空気量
はケース外に逃げる量よりも少ないから、ケース内の圧
力は大気圧よりも高くなる。 The invention of this application has the following functions. (Operation of the Invention According to Claim 1) Since the amount of cooling air introduced from the cooling and heating fan to the case is smaller than the amount of air that escapes to the outside of the case, the pressure inside the case is reduced.
The force is higher than atmospheric pressure.
【０００９】又、冷暖房用ファンからの冷却空気は、供
給口→ケース→排気口の経路でケース内を冷却しながら
通過することとなるから、ケース内が高温雰囲気になる
ことを阻止できる。尚、自動車に具備させた冷暖房用フ
ァンを使用するものであるから、特別に他の装置を必要
としない。 （請求項２記載の発明の作用） ケースに具備させた供給口の有効開口面積を排気口のそ
れよりも大きく設定してあるから、冷暖房用ファンから
の空気がケース内に供給されるとケース内の圧力は大気
圧よりも高くなる。 Further, the cooling air from the cooling and heating fan passes through while cooling the inside of the case through the route of the supply port → the case → the exhaust port, so that it is possible to prevent the inside of the case from becoming a high temperature atmosphere. Since the air-conditioning fan provided in the automobile is used, no special device is required. (Operation of the Invention According to Claim 2) Since the effective opening area of the supply port provided in the case is set to be larger than that of the exhaust port, when the air from the cooling / heating fan is supplied into the case The pressure inside is the atmosphere
Higher than pressure.
【００１０】又、冷暖房用ファンからの冷却空気は、供
給口→ケース→排気口の経路でケース内を冷却しながら
通過することとなるから、ケース内が高温雰囲気になる
ことを阻止できる。尚、自動車に具備させた冷暖房用フ
ァンを使用するものであるから、特別に他の装置を必要
としない。 （請求項３記載の発明の作用） 請求項１又は２に記載の発明のものとほぼ同様の作用を
有するが、エンジンの雰囲気温度に比べて冷暖房用ファ
ンからの冷却空気の温度は低いから、前記冷却空気は上
部から下部に向かって効果することとなり、有効に利用
される。Further, the cooling air from the cooling and heating fan passes through while cooling the inside of the case through the route of the supply port → the case → the exhaust port, so that it is possible to prevent the inside of the case from becoming a high temperature atmosphere. Since the air-conditioning fan provided in the automobile is used, no special device is required. (Operation of the Invention of Claim 3) Although it has substantially the same operation as that of the invention of Claim 1 or 2, since the temperature of the cooling air from the cooling / heating fan is lower than the ambient temperature of the engine, The cooling air has an effect from the upper part to the lower part and is effectively used.
【００１１】即ち、この発明では、冷暖房用ファンから
の冷却空気がケース内に供給されるとケース内は冷却空
気で大気圧より高い圧力状態となるから、雨天時や湿地
悪路の走行の際には泥等が、冬季の乾燥時の走行の際に
ダストが、それぞれケース内に侵入しにくいものとなっ
て歯付きベルトとこれが張設された歯付きプーリとの間
で異物が噛み合うというような事態は発生せず、又、ケ
ース内が高温雰囲気になることを阻止できる。したがっ
て、ケース外部近傍が悪条件であっても歯付きベルトの
短命化が阻止できる。 That is, according to the present invention, when the cooling air from the cooling and heating fan is supplied into the case, the inside of the case is cooled.
Since a higher pressure condition than the atmospheric pressure in a gas, mud, etc. during traveling of the rainy weather and wetlands rough road is, dust during running of the dry winter, it is assumed that each hardly invade into the case
Between the toothed belt and the toothed pulley on which it is stretched
There is no chance that foreign matter will get caught in the
It is possible to prevent a high temperature atmosphere in the space. Accordingly
Therefore, even if the condition near the outside of the case is bad, the toothed belt
Shortening of life can be prevented.
【００１２】[0012]
【実施例】以下、この出願の発明の構成を実施例として
示した図面に従って説明する。この実施例のものは、冷
暖房装置付きの自動車にこの発明の装置を施したもの
で、図１及び図２に示すように、ケースＫが、エンジン
主体２との区画壁２０とカバー１（二つ割り構造として
いる）により構成してあり、このケースＫ内に動弁系駆
動機構３を収容させてある。尚、この実施例の冷暖房装
置は手段の欄の冷暖房用ファンと対応する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the invention of this application will be described below with reference to the drawings shown as embodiments. In this embodiment, an automobile with an air conditioner is provided with the device of the present invention. As shown in FIGS. 1 and 2, a case K includes a partition wall 20 with an engine main body 2 and a cover 1 (divided into two parts). The valve operating system drive mechanism 3 is housed in the case K. The cooling and heating device of this embodiment corresponds to the cooling and heating fan in the column of means.
【００１３】動弁系駆動機構３は、図３に示すように、
クランク軸３０の端部に設けた歯付きプーリ３１と、カ
ム軸３２の端部に設けた歯付きプーリ３３と、前記歯付
きプーリ３１，３３相互間に張設された歯付きベルト３
４と、前記歯付きベルト３４に一定の張力を付与するテ
ンションプーリ３５とから構成されており、吸排気弁の
開閉動作とピストンの昇降動作が同期するようにしてあ
る。The valve drive system drive mechanism 3, as shown in FIG.
A toothed pulley 31 provided at the end of the crankshaft 30, a toothed pulley 33 provided at the end of the camshaft 32, and a toothed belt 3 stretched between the toothed pulleys 31 and 33.
4 and a tension pulley 35 that applies a constant tension to the toothed belt 34, so that the opening / closing operation of the intake / exhaust valve and the lifting operation of the piston are synchronized.
【００１４】カバー１は、図１及び図２に示すように、
略楕円形状に構成してあり、その下部域におけるシール
性を高いものとしてある。そして、自動車に搭載された
冷暖房装置（図示せず）からの空気又は冷気をケースＫ
内に導く供給口１０をカバー１の上部に具備させると共
に前記空気又は冷気をケースＫ外に逃がす排気口１１を
カバー１の下部に具備させ、前記供給口１０の有効開口
面積を排気口１１のそれよりも大きく設定している。
尚、上記冷暖房装置以外にエアーコンプレッサを備えた
ものとし、前記エアーコンプレッサにより、ケースＫ内
に空気を送る構成とすることもできる。The cover 1 is, as shown in FIGS. 1 and 2,
It is formed in a substantially elliptical shape and has a high sealing property in the lower region. Then, air or cold air from an air conditioner (not shown) mounted on the automobile is supplied to the case K.
A supply port 10 that leads to the inside is provided in the upper part of the cover 1, and an exhaust port 11 that allows the air or the cool air to escape to the outside of the case K is provided in the lower part of the cover 1 so that the effective opening area of the supply port 10 is the It is set larger than that.
An air compressor may be provided in addition to the cooling and heating device, and air may be sent into the case K by the air compressor.
【００１５】 したがって、作用・効果の欄に記載した
ように、冷暖房装置からの空気がケース内に供給される
とケースＫ内の圧力は大気圧よりも高くなるから、ケー
スの気密用シールが無くとも又は熱によりシールが劣化
した場合でも、雨天時や湿地悪路の走行の際に泥等が、
冬季の絶乾時の走行の際にダストが、それぞれケースＫ
内に侵入しにくいものとなり、又、ケースＫ内が高温雰
囲気になることを阻止できる。また、冷暖房装置からの
冷気を上記経路でケース内を通過させるようにすれば、
夏季においてもケース内が高温雰囲気となるのを阻止で
きる。したがって、この発明の装置を採用した場合、歯
付きベルト３４の背面ゴム硬化の速度を遅らせることが
できる。Therefore, as described in the section of action and effect, when the air from the cooling and heating device is supplied into the case, the pressure in the case K becomes higher than the atmospheric pressure.
Even if there is no airtight seal, or the heat deteriorates the seal
Even if you do , mud, etc. when raining or running on bad roads in wetlands,
During the dry season in winter, dust is generated in each case K.
It becomes difficult to enter the inside, and it is possible to prevent the inside of the case K from becoming a high temperature atmosphere. In addition, if the cool air from the air conditioner is passed through the case through the above path,
Even in the summer, it is possible to prevent the case from having a high temperature atmosphere. Therefore, when the device of the present invention is adopted, the speed at which the back rubber of the toothed belt 34 cures can be delayed.
【００１６】又、自動車に搭載の冷暖房装置を使用する
ものであるから、他に別装置を必要としないものとな
り、自動車の空間を狭めるようなことはない。そして、
上記した供給口１０及び排気口１１にそれぞれ流量調整
弁を設けておけば、路面の状態にあわせて、ケースＫ内
の予圧力の大きさを変化させ得るものとなる。Further, since the air conditioner mounted on the automobile is used, no separate device is required and the space of the automobile is not narrowed. And
If each of the supply port 10 and the exhaust port 11 is provided with a flow rate adjusting valve, the magnitude of the preload in the case K can be changed according to the state of the road surface.
【００１７】[0017]
【発明の効果】この発明は、上述の如くの構成を有する
ものであるから、次の効果を有する。作用の欄に記載し
た内容から、ケース外部近傍が悪条件であっても、自動
車エンジンの動弁駆動機構における歯付きベルトの短命
化が阻止できる歯付きベルトの冷却装置を提供できた。 Since the present invention has the structure as described above, it has the following effects. Enter in the action column
Even if the condition near the outside of the case is adverse,
Short Life of Toothed Belt in Car Engine Valve Drive Mechanism
It was possible to provide a cooling device for a toothed belt that can prevent the formation of a toothed belt.
【００１８】即ち、自動車エンジンの動弁系駆動機構に
おける歯付きベルトの短命化が阻止できる歯付きベルト
の冷却装置を提供できた。That is, it is possible to provide a cooling device for a toothed belt which can prevent a shortened life of the toothed belt in a valve train drive mechanism of an automobile engine.
【図１】この発明における歯付きベルトの冷却装置及び
動弁系駆動機構の斜視図。FIG. 1 is a perspective view of a toothed belt cooling device and a valve train drive mechanism according to the present invention.
【図２】前記歯付きベルトの冷却装置及び動弁系駆動機
構の説明図。FIG. 2 is an explanatory view of a cooling device for the toothed belt and a valve train driving mechanism.
【図３】前記動弁系駆動機構とエンジン主体との関係を
示す図。FIG. 3 is a diagram showing a relationship between the valve train drive mechanism and an engine main body.
Ｋ ケース ３ 動弁系駆動機構 １０ 供給口 １１ 排気口 ３０ クランク軸 ３１ 歯付きプーリ ３２ カム軸 ３３ 歯付きプーリ ３４ 歯付きベルト K case 3 Valve system drive mechanism 10 Supply port 11 Exhaust port 30 Crankshaft 31 Toothed pulley 32 Cam shaft 33 Toothed pulley 34 Toothed belt
Claims (3)
であって、クランク軸の端部に設けた歯付きプーリと、
カム軸の端部に設けた歯付きプーリと、前記歯付きプー
リ相互間に張設された歯付きベルトとから構成された動
弁系駆動機構をケース内に収容させて成る装置におい
て、自動車に具備させた冷暖房用ファンから圧送された
冷却空気をケース内に導く供給口をケースに設けると共
に前記供給口への冷却空気量よりも少ない量の冷却空気
をケース外に逃がす排気口をケースに設けていることを
特徴とする歯付きベルトの冷却装置。1. A toothed pulley which is mounted on an automobile engine and which is provided at an end of a crankshaft,
A vehicle drive system comprising a toothed pulley provided at an end portion of a cam shaft and a toothed belt stretched between the toothed pulleys and housed in a case. It was pumped from the cooling and heating fan
The case is provided with a supply port for guiding the cooling air into the case, and an exhaust port is provided in the case for letting out a smaller amount of cooling air than the cooling air to the supply port to the outside of the case. Cooling device for toothed belt.
であって、クランク軸の端部に設けた歯付きプーリと、
カム軸の端部に設けた歯付きプーリと、前記歯付きプー
リ相互間に張設された歯付きベルトとから構成された動
弁系駆動機構をケース内に収容させて成る装置におい
て、自動車に具備させた冷暖房用ファンから圧送された
冷却空気をケース内に導く供給口をケースに設けると共
に前記冷却空気をケース外に逃がす排気口をケースに設
け、前記供給口の有効開口面積を排気口のそれよりも大
きく設定していることを特徴とする歯付きベルトの冷却
装置。2. A toothed pulley which is mounted on an automobile engine and which is provided at an end of a crankshaft,
A vehicle drive system comprising a toothed pulley provided at an end portion of a cam shaft and a toothed belt stretched between the toothed pulleys and housed in a case. It was pumped from the cooling and heating fan
A supply port for introducing cooling air into the case is provided in the case, and an exhaust port for letting the cooling air out of the case is provided in the case, and the effective opening area of the supply port is set larger than that of the exhaust port. Characterized toothed belt cooling device.
口の配置をケースの下部としたことを特徴とする請求項
１又は２の歯付きベルトの冷却装置。3. The cooling device for a toothed belt according to claim 1, wherein the supply port is arranged at the upper part of the case and the exhaust port is arranged at the lower part of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3310869A JP2528407B2 (en) | 1991-11-26 | 1991-11-26 | Toothed belt cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3310869A JP2528407B2 (en) | 1991-11-26 | 1991-11-26 | Toothed belt cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05149133A JPH05149133A (en) | 1993-06-15 |
| JP2528407B2 true JP2528407B2 (en) | 1996-08-28 |
Family
ID=18010371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3310869A Expired - Lifetime JP2528407B2 (en) | 1991-11-26 | 1991-11-26 | Toothed belt cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2528407B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822641A (en) * | 1985-04-30 | 1989-04-18 | Inovan Gmbh & Co. Kg | Method of manufacturing a contact construction material structure |
| JP5229151B2 (en) * | 2009-07-31 | 2013-07-03 | 新日鐵住金株式会社 | Metal plate straightening device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53149126U (en) * | 1977-04-28 | 1978-11-24 | ||
| JPS5713376U (en) * | 1980-06-27 | 1982-01-23 |
-
1991
- 1991-11-26 JP JP3310869A patent/JP2528407B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05149133A (en) | 1993-06-15 |
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