JPS638822Y2 - - Google Patents
Info
- Publication number
- JPS638822Y2 JPS638822Y2 JP3765582U JP3765582U JPS638822Y2 JP S638822 Y2 JPS638822 Y2 JP S638822Y2 JP 3765582 U JP3765582 U JP 3765582U JP 3765582 U JP3765582 U JP 3765582U JP S638822 Y2 JPS638822 Y2 JP S638822Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotating body
- eccentric cam
- weight
- weights
- spring
- 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
Links
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000000446 fuel Substances 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関の燃料噴射時期調整装置に関
するものである。[Detailed Description of the Invention] The present invention relates to a fuel injection timing adjustment device for an internal combustion engine.
従来、機関に連結される回転体と燃料噴射ポン
プに連結される回転体とを互いに連結する偏心カ
ム機構を、遠心力によつて駆動して両者の間に回
転位相を生じさせるようにした内燃機関の燃料噴
射時期調整装置が提案されている。例えば、第１
図に示す実開昭56−71929号公報に開示されるよ
うに、図示してないデイーゼル機関と同期して回
転する円筒状ないしカツプ状の回転体４の内部に
円板状の回転体３０が収容され、この回転体３０
の中心にこれと一体的に設けた円筒状の軸１６が
図示してない燃料噴射ポンプと連結される。 Conventionally, an internal combustion engine uses centrifugal force to drive an eccentric cam mechanism that connects a rotating body connected to an engine and a rotating body connected to a fuel injection pump to create a rotational phase between the two. An engine fuel injection timing adjustment device has been proposed. For example, the first
As disclosed in Japanese Utility Model Application Publication No. 56-71929 shown in the figure, a disk-shaped rotating body 30 is installed inside a cylindrical or cup-shaped rotating body 4 that rotates in synchronization with a diesel engine (not shown). This rotating body 30
A cylindrical shaft 16 integrally provided at the center of the cylinder is connected to a fuel injection pump (not shown).
回転体４と３０は１対の偏心カム機構２０によ
つて連結される。すなわち、回転体３０には軸１
６に関して対称に１対の穴３０ａが形成され、こ
の穴３０ａの内部に第１の偏心カム５が回転自在
に嵌合され、また偏心カム５に偏心して形成した
穴５ａに第２の偏心カム１５が回転自在に嵌合さ
れている。 The rotating bodies 4 and 30 are connected by a pair of eccentric cam mechanisms 20. That is, the rotating body 30 has the shaft 1
A pair of holes 30a are formed symmetrically with respect to 6, and a first eccentric cam 5 is rotatably fitted into the hole 30a, and a second eccentric cam is fitted into the hole 5a eccentrically formed in the eccentric cam 5. 15 are rotatably fitted.
軸１６を挟むように１対の重り１４が配置さ
れ、この重り１４の両側端部は２本の案内軸２４
によつて互に拡開可能に連結される。案内軸２４
の両端側に重り１４の遠心力に対抗するばね力を
及ぼすばね２２が支持される。偏心カム５は重り
１４に設けたピン１３により支持され、偏心カム
１５は回転体４の端壁に設けたピン６により支持
されている。したがつて、回転体４の駆動力はピ
ン６および偏心カム１５，５を経て回転体３０へ
伝達される。 A pair of weights 14 are arranged so as to sandwich the shaft 16 , and two guide shafts 24 are attached to both ends of the weights 14 .
are expandably connected to each other. Guide shaft 24
A spring 22 that exerts a spring force counteracting the centrifugal force of the weight 14 is supported on both end sides. The eccentric cam 5 is supported by a pin 13 provided on the weight 14, and the eccentric cam 15 is supported by a pin 6 provided on the end wall of the rotating body 4. Therefore, the driving force of the rotating body 4 is transmitted to the rotating body 30 via the pin 6 and the eccentric cams 15 and 5.
第２図に示すように、回転体４，３０の軸心０
に関してピン６の中心Ａと偏心カム５の中心Ｃと
のなす中心角αは、回転体４，３０の矢印ｘ方向
の回転速度の増加に対して次のように変化する。
第１，２図に示す機関の停止状態から、機関の運
転に伴つて重り１４が遠心力によつて互に拡開さ
れると、ピン１３の中心Ｄが偏心カム５の中心Ｃ
の回りに矢印ｙ方向へ移動する。これに伴つて腕
DCと腕CBとが一体的に中心Ｃの回りに回動し、
ピン６の中心Ａは第２図において左方へ移動し、
中心ＣとＡのなす中心角αが次第に大きくなり、
機関の噴射時期が第３図に線３１で示すように遅
角する。そして、腕CBと腕BAが一直線に並ん
だところ（回転速度H1）で中心角αが最大とな
る。 As shown in FIG. 2, the axis of the rotating bodies 4 and 30 is 0.
The central angle α between the center A of the pin 6 and the center C of the eccentric cam 5 changes as follows with respect to an increase in the rotational speed of the rotating bodies 4 and 30 in the direction of the arrow x.
When the weights 14 are mutually expanded by centrifugal force as the engine is operated from the stopped state of the engine shown in FIGS. 1 and 2, the center D of the pin 13 becomes the center C of the eccentric cam 5.
Move around in the direction of arrow y. Along with this, the arm
DC and arm CB rotate together around center C,
The center A of pin 6 moves to the left in FIG.
The central angle α between centers C and A gradually increases,
The injection timing of the engine is retarded as shown by line 31 in FIG. Then, the central angle α becomes maximum when arm CB and arm BA are aligned in a straight line (rotational speed H 1 ).
機関の回転速度がさらに増加すると、腕CBと
腕BAとが軸心０側へ屈曲し、ピン６の中心Ａが
右方へ移動し、中心角αが次第に小さくなり、機
関の噴射時期が第３図に線３２で示すように進角
する。 When the rotational speed of the engine further increases, arms CB and BA bend toward the axis 0 side, the center A of pin 6 moves to the right, the center angle α gradually decreases, and the engine injection timing reaches the The angle is advanced as shown by line 32 in FIG.
ところが、上述した従来の燃料噴射時期調整装
置では、重り１４の径外方への最大移動量、すな
わち最大リフトLAを規制するために、第１図に
示すように、各重り１４の両側端部周面に円筒状
のくぼみ２８を設け、このくぼみ２−８を貫通す
るように案内軸２４を支持するとともに、該案内
支軸２４に１対の円筒状のばね座２５，２６を挿
通し、ばね座２５はくぼみ２８に衝合させ、ばね
座６は止め輪２７をもつて案内軸２４の端部に係
止したうえ、ばね座２５と２６の間にばね２２を
介装している。そして、重り１４の最大リフト
LAで、ばね座２５をばね座２６に衝合させて規
制している。 However, in the conventional fuel injection timing adjustment device described above, in order to regulate the maximum amount of radially outward movement of the weights 14, that is, the maximum lift LA , as shown in FIG. A cylindrical recess 28 is provided on the peripheral surface of the part, and a guide shaft 24 is supported so as to pass through this recess 2-8, and a pair of cylindrical spring seats 25 and 26 are inserted into the guide support shaft 24. , the spring seat 25 is brought into abutment with the recess 28, the spring seat 6 is secured to the end of the guide shaft 24 with a retaining ring 27, and a spring 22 is interposed between the spring seats 25 and 26. . And the maximum lift of weight 14
At L A , the spring seat 25 is regulated by abutting against the spring seat 26.
ところが、重り１４に作用する力は最大リフト
を超えた後も機関の回転速度に比例して増大する
から、この遠心力を支持する止め輪２７は過大な
スラストに対して耐えきれず、案内軸２４からば
ね座２６が外れてしまう恐れがある。 However, since the force acting on the weight 14 increases in proportion to the rotational speed of the engine even after the maximum lift is exceeded, the retaining ring 27 that supports this centrifugal force cannot withstand the excessive thrust, and the guide shaft There is a risk that the spring seat 26 may come off from the spring seat 24.
そこで、本考案の目的はこのような重りに作用
する過大な遠心力に対して、構成が簡単で、損傷
を来たすことなく、確実に重りの最大リフトを規
制し得る燃料噴射時期調整装置を提供することに
ある。 Therefore, the purpose of the present invention is to provide a fuel injection timing adjustment device that has a simple configuration and can reliably regulate the maximum lift of the weight without causing damage in response to such excessive centrifugal force acting on the weight. It's about doing.
このため、本考案の構成は機関と燃料噴射ポン
プの内の一方に連結される円筒状の第１の回転体
と、他方に連結されかつ前記第１の回転体に収容
される円板状の第２の回転体とを同心に配置し、
前記第２の回転体の中心に結合した軸を挟みかつ
ばねに抗して拡開される１対の重りを配置し、前
記１対の重りの両側端部を貫通する案内軸の両端
部と前記重りとの間に前記ばねを介装し、前記第
２の回転体の内部に回転可能に嵌合した第１の偏
心カムを前記重りに設けた第１のピンに支持し、
前記第１の偏心カムの内部に回転可能に嵌合した
第２の偏心カムを前記第１の回転体の端壁に設け
た第２のピンに支持した内燃機関の燃料噴射時期
調整装置において、前記各重りの少なくとも両側
端部に、外周面から径外方へ突出しかつ前記第１
の回転体の内周面に摺接して前記重りの最大リフ
トを規制する突片を設けたものである。 Therefore, the configuration of the present invention includes a cylindrical first rotating body connected to one of the engine and the fuel injection pump, and a disc-shaped first rotating body connected to the other and housed in the first rotating body. The second rotating body is arranged concentrically,
A pair of weights are arranged to sandwich a shaft connected to the center of the second rotating body and expand against a spring, and both ends of a guide shaft passing through both ends of the pair of weights are arranged. a first eccentric cam rotatably fitted inside the second rotating body with the spring interposed between the weight and the first eccentric cam supported by a first pin provided on the weight;
A fuel injection timing adjustment device for an internal combustion engine in which a second eccentric cam rotatably fitted inside the first eccentric cam is supported on a second pin provided on an end wall of the first rotating body, At least at both end portions of each of the weights, the first
A protrusion is provided that slides on the inner circumferential surface of the rotating body to restrict the maximum lift of the weight.
本考案を実施例に基づいて説明すると、第４図
に示すように、重り１４の両側端部において、外
周面に突片１０を一体に形成し、突片１０の外端
面を平滑に好ましくは円弧面に仕上げる。 To explain the present invention based on an embodiment, as shown in FIG. 4, protrusions 10 are integrally formed on the outer peripheral surface at both ends of the weight 14, and the outer end surfaces of the protrusions 10 are preferably made smooth. Finish to an arcuate surface.
本考案はこのように構成することによつて、従
来のようにばね座２５，２６に互いに衝合する円
筒部は設けないで、ばね座２５と２６が衝合する
前に、突片１０が回転体４の内周面に摺接し、重
り１４の最大リフトが規制される。したがつて、
機関の高速運転で重り１４に作用する遠心力は突
片１０を介して直接回転体４で受け止められるの
で、ばね座を支持する止め輪２７が過大な力から
保護され、損傷するのを防止することができる。 By configuring the present invention in this manner, the protruding piece 10 is removed before the spring seats 25 and 26 collide, instead of providing the spring seats 25 and 26 with cylindrical portions that abut each other as in the conventional case. It comes into sliding contact with the inner circumferential surface of the rotating body 4, and the maximum lift of the weight 14 is regulated. Therefore,
Since the centrifugal force acting on the weight 14 during high-speed operation of the engine is directly received by the rotating body 4 via the projection 10, the retaining ring 27 supporting the spring seat is protected from excessive force and is prevented from being damaged. be able to.
重り１４の中央部にただ１つの突片を設けるこ
とも考えられるが、この場合は機関のトルク変動
に伴つて重り１４がピン１３を中心として第４図
の矢印ｐ方向に回転振動することがあるので好ま
しくない。したがつて、突片１０は重り１４の両
側端部にそれぞれ配置することによつて、このよ
うな振動を防止することができる。 It is also possible to provide only one protruding piece in the center of the weight 14, but in this case, the weight 14 may rotate and vibrate in the direction of the arrow p in FIG. 4 about the pin 13 as the engine torque fluctuates. I don't like it because it is. Therefore, by arranging the protruding pieces 10 at both ends of the weight 14, such vibrations can be prevented.
突片１０は必ずしも左右１対だけでなく、第５
図に示すように、重り１４の両側端部と中央部と
に３個設けてもよいし、さらに数多く設けてもよ
い。 The protrusions 10 are not necessarily provided in just one pair on the left and right, but also in the fifth pair.
As shown in the figure, three weights may be provided at both ends and the center of the weight 14, or a greater number may be provided.
また、第６図に示すように、突片１０を一体に
形成する代りに、重り１４に穴８またはねじ穴を
設け、これに突片９を圧入するか、または螺合し
て取付けるようにしてもよい。 Further, as shown in FIG. 6, instead of integrally forming the projecting piece 10, the weight 14 is provided with a hole 8 or a screw hole, and the projecting piece 9 is press-fitted into the hole or screwed into the hole. You can.
要するに、本考案は重り１４の外周面に少なく
とも左右１対の突片９，１０を設けたことが特徴
であり、この構成によつて機関の高速域で重りが
最大リフトに至ると、前記突片が回転体の円筒内
周面に摺接して、重りに作用する遠心力が直接回
転体で受け止められることとなるので、重りにば
ね力を付与するためのばねを支持しているばね座
に無理な力が作用するのを防止することができ、
これによつてばね座を案内軸に支持する止め輪２
７が損傷し、有効なばね力が重りに加えられなく
なるという事故を解消することができる。 In short, the present invention is characterized in that at least a pair of right and left protrusions 9, 10 are provided on the outer peripheral surface of the weight 14, and with this configuration, when the weight reaches its maximum lift in the high speed range of the engine, the protrusions The piece slides against the cylindrical inner circumferential surface of the rotating body, and the centrifugal force acting on the weight is directly received by the rotating body, so the spring seat that supports the spring that applies spring force to the weight It can prevent excessive force from being applied,
Retaining ring 2 that supports the spring seat on the guide shaft
7 is damaged and an effective spring force cannot be applied to the weight.
第１図は従来の燃料噴射時期調整装置の正面
図、第２図は同装置の偏心カム機構の作動を説明
するための正面図、第３図は同装置の作動特性を
示す線図、第４図は本考案の第１実施例に係る燃
料噴射時期調整装置の要部を示す正面図、第５図
は本考案の第２実施例に係る燃料噴射時期調整装
置の要部を示す正面図、第６図は本考案の第３実
施例に係る燃料噴射時期調整装置の要部を示す正
面断面図である。
４，３０：第１，第２の回転体、５，１５：第
１，第２の偏心カム、６，１３：ピン、９，１
０：突片、１４：重り、１６：軸、２０：偏心カ
ム機構、２２：ばね、２４：案内軸、２５，２
６：ばね座、２７：止め輪。
Fig. 1 is a front view of a conventional fuel injection timing adjustment device, Fig. 2 is a front view for explaining the operation of the eccentric cam mechanism of the device, and Fig. 3 is a diagram showing the operating characteristics of the device. FIG. 4 is a front view showing the main parts of the fuel injection timing adjustment device according to the first embodiment of the present invention, and FIG. 5 is a front view showing the main parts of the fuel injection timing adjustment device according to the second embodiment of the invention. , FIG. 6 is a front sectional view showing the main parts of a fuel injection timing adjustment device according to a third embodiment of the present invention. 4, 30: first and second rotating bodies, 5, 15: first and second eccentric cams, 6, 13: pin, 9, 1
0: Projection piece, 14: Weight, 16: Shaft, 20: Eccentric cam mechanism, 22: Spring, 24: Guide shaft, 25,2
6: Spring seat, 27: Retaining ring.
Claims (1)
円筒状の第１の回転体と、他方に連結されかつ前
記第１の回転体に収容される円板状の第２の回転
体とを同心に配置し、前記第２の回転体の中心に
結合した軸を挟みかつばねに抗して拡開される１
対の重りを配置し、前記１対の重りの両側端部を
貫通する案内軸の両端部と前記重りとの間に前記
ばねを介装し、前記第２の回転体の内部に回転可
能に嵌合した第１の偏心カムを前記重りに設けた
第１のピンに支持し、前記第１の偏心カムの内部
に回転可能に嵌合した第２の偏心カムを前記第１
の回転体の端壁に設けた第２のピンに支持した内
燃機関の燃料噴射時期調整装置において、前記各
重りの少なくとも両側端部に、外周面から径外方
へ突出しかつ前記第１の回転体の内周面に摺接し
て前記重りの最大リフトを規制する突片を設けた
ことを特徴とする内燃機関の燃料噴射時期調整装
置。 A cylindrical first rotating body connected to one of the engine and the fuel injection pump, and a disc-shaped second rotating body connected to the other and housed in the first rotating body are concentrically arranged. 1 which is disposed at the center of the second rotating body and is expanded against the spring while sandwiching the shaft connected to the center of the second rotating body.
A pair of weights are arranged, the spring is interposed between the weights and both ends of a guide shaft passing through both ends of the pair of weights, and the spring is rotatably installed inside the second rotating body. The fitted first eccentric cam is supported by a first pin provided on the weight, and the second eccentric cam rotatably fitted inside the first eccentric cam is supported by the first eccentric cam.
In the fuel injection timing adjustment device for an internal combustion engine supported by a second pin provided on an end wall of a rotary body, at least both end portions of each of the weights protrude radially outward from the outer circumferential surface and the first rotation A fuel injection timing adjustment device for an internal combustion engine, characterized in that a protrusion is provided that slides on the inner circumferential surface of the body and regulates the maximum lift of the weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3765582U JPS58139539U (en) | 1982-03-17 | 1982-03-17 | Fuel injection timing adjustment device for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3765582U JPS58139539U (en) | 1982-03-17 | 1982-03-17 | Fuel injection timing adjustment device for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58139539U JPS58139539U (en) | 1983-09-20 |
| JPS638822Y2 true JPS638822Y2 (en) | 1988-03-16 |
Family
ID=30049033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3765582U Granted JPS58139539U (en) | 1982-03-17 | 1982-03-17 | Fuel injection timing adjustment device for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58139539U (en) |
-
1982
- 1982-03-17 JP JP3765582U patent/JPS58139539U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58139539U (en) | 1983-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |