JPH0352992Y2 - - Google Patents
Info
- Publication number
- JPH0352992Y2 JPH0352992Y2 JP4807285U JP4807285U JPH0352992Y2 JP H0352992 Y2 JPH0352992 Y2 JP H0352992Y2 JP 4807285 U JP4807285 U JP 4807285U JP 4807285 U JP4807285 U JP 4807285U JP H0352992 Y2 JPH0352992 Y2 JP H0352992Y2
- Authority
- JP
- Japan
- Prior art keywords
- cam
- fuel injection
- advance angle
- cam follower
- cylinder
- 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
- 230000005540 biological transmission Effects 0.000 claims description 55
- 238000002347 injection Methods 0.000 claims description 49
- 239000007924 injection Substances 0.000 claims description 49
- 239000000446 fuel Substances 0.000 claims description 41
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000003921 oil Substances 0.000 description 18
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001141 propulsive effect Effects 0.000 description 3
- 244000145845 chattering Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
＜産業上の利用分野＞
本考案は、多気筒内燃機関の燃料噴射装置の噴
射時期を自動的に進角する装置に関し、進角精度
を向上するとともに、気筒全体に亘つて進角装置
の組立を容易にできるものを提供する。[Detailed description of the invention] <Industrial application field> The present invention relates to a device that automatically advances the injection timing of a fuel injection device of a multi-cylinder internal combustion engine. To provide an advance angle device that can be easily assembled.
＜従来技術＞
一般に、圧縮点火機構では燃料が噴射されてか
ら着火するまでの着火遅れ期間があるため、機関
の回転速度の増減に応じて燃料噴射時期を調整す
る必要がある。<Prior Art> Generally, in a compression ignition mechanism, there is an ignition delay period from when fuel is injected until it ignites, so it is necessary to adjust the fuel injection timing according to increases and decreases in the rotational speed of the engine.
そこで、上記燃料噴射装置の噴射時期を調整す
る進角装置の基本構造を述べると、例えば、第１
図又は第４図に示すように、多気筒内燃機関Ｅの
燃料噴射装置Ｓが各気筒Ｃに対応する複数の燃料
噴射機構１から成り、各燃料噴射機構１の燃料噴
射用カム２をカムフオロア３、プツシユロツド４
を介して燃料噴射機構１のプランジヤ７に連動連
結し、カムフオロア３を伝動具８を介して進角用
駆動装置１０にカム２の線接方向Ａに制御駆動可
能に連動連結して構成したものである。 Therefore, to describe the basic structure of the advance angle device that adjusts the injection timing of the fuel injection device, for example, the first
4, a fuel injection device S of a multi-cylinder internal combustion engine E is composed of a plurality of fuel injection mechanisms 1 corresponding to each cylinder C, and a fuel injection cam 2 of each fuel injection mechanism 1 is connected to a cam follower 3. , Pussyrod 4
The cam follower 3 is interlocked and connected to the plunger 7 of the fuel injection mechanism 1 via the transmission device 8, and the cam follower 3 is interlocked and connected to the advance angle drive device 10 via the transmission device 8 so as to be controllably driven in the tangential direction A of the cam 2. It is.
そして、従来の進角装置としては、特開昭49−
70031号公報に示すものがある（第５図参照）。 And, as a conventional advance angle device,
There is one shown in Publication No. 70031 (see Figure 5).
即ち、上記基本構造において、カムフオロア３
を揺動腕で構成し、伝動具８を偏心回転軸で構成
し、揺動腕３のカムローラ５３から離れる中間部
に形成したプツシユロツド受部５２にプツシユロ
ツド４を接当させる。 That is, in the above basic structure, the cam follower 3
is composed of a swinging arm, the transmission tool 8 is composed of an eccentric rotating shaft, and the pushrod 4 is brought into contact with a pushrod receiving part 52 formed in the middle part of the swinging arm 3 away from the cam roller 53.
これにより、進角用駆動装置１０で偏心回転軸
８を制御回転する事により、揺動腕３の基端部３
１を円弧運動させて、カムローラ５３を燃料噴射
用カム２の接線方向に進角移動するようにしたも
のである。 As a result, by controlling and rotating the eccentric rotation shaft 8 with the advance angle drive device 10, the base end portion 3 of the swinging arm 3 is rotated.
The cam roller 53 is advanced in the tangential direction of the fuel injection cam 2 by moving the cam 1 in an arc.
＜考案が解決しようとする問題点＞
上記従来装置は、機関の回転速度に応じて燃料
時期を進角する事ができるのであるが、次の問題
がある。<Problems to be Solved by the Invention> The conventional device described above can advance the fuel timing in accordance with the rotational speed of the engine, but it has the following problems.
イ 偏心回転軸８の回転角に対しカムローラ５３
の進角移動寸法が正弦曲線的に変化するため、
進角制御を均一に行なえず、誤差が生ずる。A The cam roller 53 is
Since the advance angle movement dimension of changes sinusoidally,
Advance angle control cannot be performed uniformly, resulting in errors.
また、この誤差を補正するために、エンジン
の回転速度に対する進角用駆動装置１０の作動
速度を変化させ、又は進角用駆動装置１０と偏
心回転軸８との間に伝動速度変更装置を介在さ
せる事などが考えられるが、その誤差補正のた
めの装置が余分に要り、構造が複雑化するう
え、その設計にも手間がかかる。 In order to correct this error, the operating speed of the advance angle drive device 10 may be changed relative to the engine rotational speed, or a transmission speed change device may be interposed between the advance angle drive device 10 and the eccentric rotating shaft 8. However, this would require an extra device to correct the error, which would complicate the structure and take time to design.
ロ 偏心回転軸８を制御回転したときに、プツシ
ユロツド４に対してプツシユロツド受部５２が
遠近偏位して、プツシユロツド４とロツカアー
ム５との間にクリアランスが余分に発生し、噴
射駆動時の衝撃でプツシユロツド４がチヤタリ
ングし易く、早く傷むうえ、エンジンの高速運
転化の障害になる。(b) When the eccentric rotating shaft 8 is rotated in a controlled manner, the push rod receiving part 52 is deviated from the distance from the push rod 4, and an extra clearance is generated between the push rod 4 and the rocker arm 5, which is caused by the impact during the injection drive. The push rod 4 tends to chatter and is damaged quickly, and also becomes an obstacle to high-speed operation of the engine.
ハ 当該従来装置では、揺動腕３を偏心回転軸８
に嵌合させるため、その基端部５１を二つ割形
にする必要がある。C. In the conventional device, the swing arm 3 is connected to the eccentric rotation shaft 8.
In order to fit into the base end 51, it is necessary to make the base end 51 into two parts.
また、この二つ割形の基端部５１を機関の固
定壁内の狭いスペースで組付ける作業に手間が
かかり、非能率である。 Further, it is time-consuming and inefficient to assemble the halved base end portion 51 in a narrow space within the fixed wall of the engine.
本考案は、燃料噴射時期の調整を容易にして進
角精度を向上し、進角装置の組立を簡単にすると
ともに、多気筒機関においてもその構造を簡素化
することを技術的課題とする。 The technical objective of the present invention is to facilitate the adjustment of the fuel injection timing, improve the advance angle accuracy, simplify the assembly of the advance angle device, and simplify the structure even in a multi-cylinder engine.
＜問題点を解決するための手段＞
上記問題を解決する手段を、実施例に対応する
第１図乃至第４図を用いて、以下に説明する。<Means for Solving the Problems> Means for solving the above problems will be described below with reference to FIGS. 1 to 4, which correspond to embodiments.
即ち、カムフオロア３をタペツトで構成して伝
動具８の摺動案内部１１にカム２の遠心方向Ｂに
沿つて摺動自在に嵌合し、伝動具８を内燃機関Ｅ
に固定の直線案内部１２にカムの線接方向Ａに沿
つて摺動自在に嵌合し、各燃料噴射機構１の各伝
動具８の全部を一本の共通伝動軸３０にそれぞれ
ラツクとピニオンとの噛合せを介して連動連結
し、この共通伝動軸３０を進角用駆動装置１０に
連動連結して構成したものである。 That is, the cam follower 3 is constructed of a tapepet and is fitted into the sliding guide portion 11 of the transmission tool 8 so as to be slidable along the centrifugal direction B of the cam 2, and the transmission tool 8 is connected to the internal combustion engine E.
The cam is slidably fitted into a linear guide portion 12 fixed to the cam along the tangential direction A of the cam, and all of the transmission devices 8 of each fuel injection mechanism 1 are connected to one common transmission shaft 30 with a rack and a pinion, respectively. The common transmission shaft 30 is interlocked and connected to the advance angle drive device 10 through meshing with the common transmission shaft 30.
＜作用＞
カムフオロア３をタペツトで構成するので、プ
ツシユロツド４とカムフオロア３との連接箇所を
燃料噴射用カム２の上方に持つて来ることができ
るうえ、タペツト３を嵌合した伝動具８を直線案
内部１２に沿つて摺動自在に嵌合するので、進角
用駆動装置１０の調整によつてカムフオロア３と
噴射用カム２との接当箇所を直線的に平行移動す
ることができる。<Function> Since the cam follower 3 is composed of a tapepet, the connection point between the push rod 4 and the cam follower 3 can be brought above the fuel injection cam 2, and the transmission tool 8 fitted with the tappet 3 can be linearly guided. Since they are fitted to be slidable along the portion 12, the contact point between the cam follower 3 and the injection cam 2 can be moved linearly in parallel by adjusting the advance drive device 10.
また、伝動具８はカムの接線方向に直線的に平
行移動するので、当該伝動具８に嵌合するカムフ
オロア３はこの平行移動に際して上下方向に沈み
込むことがなく、プツシユロツド４とロツカアー
ム５との間のクリアランスを一定に保つことがで
きる。 Furthermore, since the transmission tool 8 moves linearly in parallel in the tangential direction of the cam, the cam follower 3 that fits into the transmission tool 8 does not sink in the vertical direction during this parallel movement, and the push rod 4 and rocker arm 5 The clearance between can be kept constant.
しかも、共通伝動軸３０を各伝動具８にラツク
とピニオンとの噛合せを介して連動連結するの
で、一本の共通伝動具１０を介して各気筒に対応
する全伝動具８を一挙に駆動できる。 Moreover, since the common transmission shaft 30 is interlocked and connected to each transmission device 8 through meshing of the rack and pinion, all the transmission devices 8 corresponding to each cylinder are driven at once via one common transmission device 10. can.
＜考案の効果＞
カムフオロアと噴射用カム２との接当箇所を進
角用駆動装置によつて直線的に平行移動できるの
で、当該進角装置の駆動に対して燃料噴射時期を
一次函数的に変化させることができ、進角制御を
均一に行なつて進角装置の精度を向上することが
できる。<Effects of the invention> Since the contact point between the cam follower and the injection cam 2 can be moved in parallel in a straight line by the advance angle drive device, the fuel injection timing can be adjusted as a linear function with respect to the drive of the advance angle drive device. The advance angle can be controlled uniformly and the accuracy of the advance angle device can be improved.
また、伝動具の摺動によつてもプツシユロツド
とロツカアームのクリアランスを一定に保てるの
で、プツシユロツドがチヤタリングを起こすこと
をなくし、このチヤタリングによる燃料噴射装置
の損傷を解消して、当該噴射装置の高速耐久化を
達成できる。 In addition, the clearance between the push rod and the rocker arm can be kept constant even by sliding the transmission, which eliminates chattering of the push rod, eliminates damage to the fuel injection device caused by this chattering, and improves the high-speed durability of the injector. can be achieved.
さらに、本考案によれば、一本の共通伝動具を
各気筒に対応する各伝動具に連動連結すれば良い
ので、進角装置の組立てを簡単にできる。 Further, according to the present invention, since it is only necessary to interlock and connect one common transmission device to each transmission device corresponding to each cylinder, the advance angle device can be easily assembled.
しかも、この共通伝動具を進角用駆動装置に連
動して各伝動具を駆動するので、進角用駆動装置
を一つで済まして、進角装置全体の構造を簡単に
することができるうえ、当該共通伝動具で各気筒
における進角駆動を共通化できるので、各気筒毎
の進角精度のバラ付きをなくせる。 Moreover, since this common transmission device is linked to the advance angle drive device to drive each transmission device, only one advance angle drive device is required, which simplifies the structure of the entire advance angle device. Since the advance angle drive for each cylinder can be shared by the common transmission device, variations in advance angle accuracy for each cylinder can be eliminated.
＜実施例＞
以下、本考案の実施例を図面に基いて説明す
る。<Example> Hereinafter, an example of the present invention will be described based on the drawings.
第１図は進角装置の作動原理図、第２図は縦型
頭上弁式デイーゼルエンジンの要部縦断正面図、
第３図は同エンジンの要部横断平面図、第４図は
３気筒デイーゼルエンジンにおける燃料噴射装置
及び進角装置の要部概略斜視図である。 Figure 1 is a diagram of the operating principle of the advance angle device, Figure 2 is a longitudinal sectional front view of the main parts of a vertical overhead valve type diesel engine,
FIG. 3 is a cross-sectional plan view of the main parts of the same engine, and FIG. 4 is a schematic perspective view of the main parts of the fuel injection device and the advance angle device in the three-cylinder diesel engine.
デイーゼルエンジンＥはシリンダブロツク１４
の中央に形成した３つのシリンダ１５に各々ピス
トン１６を上下動自在に内嵌し、このシリンダ１
５の左方にクランク軸と連動した動弁カム軸１７
を前後方向に軸架し、動弁カム軸１７に大径の燃
料噴射用カム２を形成する。 Diesel engine E has cylinder block 14
A piston 16 is fitted into each of the three cylinders 15 formed in the center of the cylinder 1 so as to be able to move up and down.
Valve drive camshaft 17 linked to the crankshaft is on the left side of 5.
is mounted on a shaft in the front-rear direction, and a large-diameter fuel injection cam 2 is formed on the valve train camshaft 17.
上記動弁カム軸１７の周辺のシリンダブロツク
１４の左右方向に直線案内部１２を有する案内孔
１８を空け、又、上下方向にプツシユロツド嵌挿
孔１９を空ける。 A guide hole 18 having a linear guide portion 12 is formed in the horizontal direction of the cylinder block 14 around the valve drive camshaft 17, and a push rod insertion hole 19 is formed in the vertical direction.
シリンダブロツク１４の上方にシリンダヘツド
２０を組付け、シリンダヘツド２０にロツカアー
ムカバー２１を取付け、シリンダヘツド２０にプ
ツシユロツド嵌挿孔１９、噴射ノズル嵌挿孔２２
及び吸・排気ポートを各々空ける。 The cylinder head 20 is assembled above the cylinder block 14, the rocker arm cover 21 is attached to the cylinder head 20, the push rod insertion hole 19 and the injection nozzle insertion hole 22 are attached to the cylinder head 20.
and open the intake and exhaust ports.
ユニツトインジエクタ式燃料噴射装置Ｓを各気
筒Ｃに対応する複数の燃料噴射機構１から構成
し、燃料噴射機構１を燃料噴射用カム２、カムフ
オロア３、プツシユロツド４、ロツカアーム５及
びユニツトインジエクタ６から構成する。 The unit injector type fuel injection device S is composed of a plurality of fuel injection mechanisms 1 corresponding to each cylinder C, and the fuel injection mechanism 1 is composed of a fuel injection cam 2, a cam follower 3, a push rod 4, a rocker arm 5, and a unit injector 6. Configure.
燃料噴射ポンプ及び燃料噴射ノズルを一体に組
合わせたユニツトインジエクタ６を各気筒Ｃに対
応するシリンダヘツド２０の上端面２０ａに配置
し、当該インジエクタ６のペンシル型噴射ノズル
２３を噴射ノズル嵌挿孔２２に嵌挿して、その先
端２３ａを燃焼室に臨ませる。 A unit injector 6, which is a combination of a fuel injection pump and a fuel injection nozzle, is arranged on the upper end surface 20a of the cylinder head 20 corresponding to each cylinder C, and the pencil-type injection nozzle 23 of the injector 6 is inserted into the injection nozzle insertion hole. 22 so that its tip 23a faces the combustion chamber.
上記シリンダヘツド２０の上端のロツカアーム
室２４にはロツカアーム５をブラケツトに揺動自
在に枢支し、ロツカアーム５の出力部２５をユニ
ツトインジエクタ６のポンプ部６ａのプランジヤ
７に打撃可能に臨ませる。 A rocker arm 5 is swingably supported on a bracket in a rocker arm chamber 24 at the upper end of the cylinder head 20, and the output portion 25 of the rocker arm 5 is made to face the plunger 7 of the pump portion 6a of the unit injector 6 so as to be impactable.
また、上記シリンダブロツク１４に形成した案
内孔１８の右側開放端１８ａから部分円筒状の伝
動具８を嵌挿して、前記燃料噴射用カム２の接線
方向Ａ、即ち、左右方向に沿つて当該伝動具８を
摺動自在に設定する。 Further, a partially cylindrical transmission device 8 is inserted into the right open end 18a of the guide hole 18 formed in the cylinder block 14, and the transmission device 8 is inserted in the tangential direction A of the fuel injection cam 2, that is, along the left-right direction. The tool 8 is set to be slidable.
この伝動具８の右寄りに摺動案内部１１を空
け、円筒状のタペツトで構成したカムフオロア３
を当該摺動案内孔１１に噴射用カム２の遠心方向
Ｂに沿つて摺動自在に嵌合する。 A sliding guide portion 11 is provided on the right side of the transmission device 8, and a cam follower 3 is formed of a cylindrical tapepet.
is fitted into the sliding guide hole 11 so as to be slidable along the centrifugal direction B of the injection cam 2.
燃料噴射用カム２にはそのカム軸方向に沿つて
半円筒状のカムノーズ２６が固定され、当該カム
２の上方に位置するタペツト６の下面には同じく
カム軸方向に沿つて円筒状のタペツトローラ２７
が固定されて、噴射用カム２の回転によりタペツ
ト６が急激に打撃されるように構成される。 A semi-cylindrical cam nose 26 is fixed to the fuel injection cam 2 along the cam shaft direction, and a cylindrical tappet roller 27 is fixed to the lower surface of the tappet 6 located above the cam 2, also along the cam shaft direction.
is fixed so that the tappet 6 is suddenly struck by the rotation of the injection cam 2.
シリンダブロツク１４及びシリンダヘツド２０
に空けたプツシユロツド嵌挿孔１９にプツシユロ
ツド４を遊嵌させ、その上端４ａをロツカアーム
５の入力部２８に当接し、その下端４ｂをカムフ
オロア３に連接する。 Cylinder block 14 and cylinder head 20
The push rod 4 is loosely fitted into the push rod insertion hole 19 bored in the hole 19, its upper end 4a abuts the input part 28 of the rocker arm 5, and its lower end 4b is connected to the cam follower 3.
上記動弁カム軸１７の上方左側のシリンダブロ
ツク１４に前後方向に亘つて共通伝動軸３０を軸
架し、共通伝動軸３０の前端３１及び各気筒Ｃに
設けた伝動具８に面する部位３２に各々部分的に
ピニオン３３を刻む。 A common transmission shaft 30 is mounted longitudinally on the cylinder block 14 on the upper left side of the valve drive camshaft 17, and includes a front end 31 of the common transmission shaft 30 and a portion 32 facing the transmission tool 8 provided in each cylinder C. 3. Cut the pinion 33 partially into each.
ブースターポンプＰからの油圧を受けて作動す
るブースター１０をシリンダブロツク１４の側壁
前方に配置して進角用駆動装置とし、ブースター
３４をブースター本体３５、操作部３６及び弾圧
バネ３７から構成する。 A booster 10 that operates in response to hydraulic pressure from a booster pump P is disposed in front of the side wall of the cylinder block 14 to serve as an advance drive device, and the booster 34 is composed of a booster body 35, an operating section 36, and a compression spring 37.
当該ブースター１０のブースター本体３５には
ブースターポンプＰからの圧油を流入、流出せし
める入口３８及び出口３９を空け、操作部３６を
左右方向Ａに沿つて摺動可能に嵌挿する。 The booster main body 35 of the booster 10 has an inlet 38 and an outlet 39 for allowing pressure oil from the booster pump P to flow in and out, and an operating part 36 is fitted therein so as to be slidable along the left-right direction A.
この操作部３６は大径の円筒部４０と小径の円
筒部４１を一体に連設して形成され、ブースター
本体３５の側壁部４３と小径円筒部４１の間隙を
第１油室４５として、この中に弾圧バネ３７を収
容して操作部３６をブースター本体３５内に後退
せしめる向き（即ち、第１図及び第２図では左向
き）に弾圧付勢する。 This operation part 36 is formed by integrally connecting a large diameter cylindrical part 40 and a small diameter cylindrical part 41, and the gap between the side wall part 43 of the booster main body 35 and the small diameter cylindrical part 41 is used as a first oil chamber 45, and this A resilient spring 37 is accommodated therein to bias the operating portion 36 in a direction that causes it to retreat into the booster body 35 (that is, toward the left in FIGS. 1 and 2).
また、ブースター本体３５の奥端部４６と大径
円筒部４０の間隙を第２油室４７とし、通油孔５
０を介して第１油室４５を第２油室４７に連通す
る。 Further, the gap between the rear end portion 46 of the booster body 35 and the large diameter cylindrical portion 40 is defined as a second oil chamber 47, and the oil passage hole 5
The first oil chamber 45 is communicated with the second oil chamber 47 via the second oil chamber 47 .
尚、符号４８は通油孔５０内に設けた逆止弁
で、第２油室４７に所定以上の外力が作用すれば
自動的に閉止するように設定する。 Reference numeral 48 designates a check valve provided in the oil passage hole 50, which is set to automatically close if an external force of a predetermined value or more is applied to the second oil chamber 47.
上記操作部３６の小径円筒部の先端上面にラツ
ク５１を形成し、前記共通伝動軸３０の前端に刻
んだピニオン３３に当該ラツク５１を噛合わせ
る。 A rack 51 is formed on the upper surface of the tip of the small diameter cylindrical portion of the operating portion 36, and the rack 51 is engaged with the pinion 33 carved in the front end of the common transmission shaft 30.
また、前記伝動具８の下端面にラツク５２を形
成し、共通伝動軸３０の各気筒対応箇所に刻んだ
ピニオン３３に当該ラツク５２を噛合わせて、い
わば、共通伝動軸３０の上・下に伝動具８及びブ
ースター１０が配置するように構成する（第２図
参照）。 In addition, a rack 52 is formed on the lower end surface of the transmission tool 8, and the rack 52 is engaged with a pinion 33 carved at a position corresponding to each cylinder of the common transmission shaft 30, so that the rack 52 is connected to the top and bottom of the common transmission shaft 30. The transmission device 8 and the booster 10 are arranged (see FIG. 2).
そして、ブースター１０の操作部３６の摺動、
即ち、進角用駆動装置１０の調整により、一本の
共通伝動軸３０を介して各気筒に対応する全伝動
具８を左右方向Ａに移動可能に設定する。 And the sliding of the operation part 36 of the booster 10,
That is, by adjusting the advance drive device 10, all the transmission devices 8 corresponding to each cylinder are set to be movable in the left-right direction A via one common transmission shaft 30.
以下、上記進角装置の機能を第１図に基いて説
明する。 Hereinafter, the function of the advance angle device will be explained based on FIG. 1.
エンジン運転に際してはブースターポンプＰか
らの圧油がブースター１０の第１油室４５に常時
流入し、通油孔５０を経て第２油室４７にも満た
される。 During engine operation, pressure oil from the booster pump P constantly flows into the first oil chamber 45 of the booster 10 and also fills the second oil chamber 47 via the oil passage hole 50.
ブースター１０の操作部３６の動作をみると、
第２油室４７において操作部の大径円筒部４０が
受ける共通伝動軸３０の方向への力F1は、第１
油室４５において小径円筒部４１が受ける共通伝
動軸３０から離れる方向への力F2よりも大きい
（即ち、油に接する面積が大きいことによる）の
で、操作部３６は共通伝動軸３０の方向に進出し
ようとする力Ｆ（＝F1−F2）を圧油により受ける
ことになるが、弾圧バネ３７の付勢力が推進力Ｆ
より強い場合には、操作部３６は進出しないので
ある。 Looking at the operation of the operation unit 36 of the booster 10,
The force F 1 in the direction of the common transmission shaft 30 that the large-diameter cylindrical portion 40 of the operating section receives in the second oil chamber 47 is
Since the force F 2 in the direction away from the common power transmission shaft 30 that the small diameter cylindrical portion 41 receives in the oil chamber 45 is larger (that is, due to the large area in contact with the oil), the operating portion 36 is moved in the direction of the common power transmission shaft 30. The force F (=F 1 −F 2 ) that attempts to advance is received by the pressure oil, but the biasing force of the compression spring 37 is the propulsive force F
If the force is stronger, the operating section 36 will not advance.
従つて、エンジン回転数が上昇してブースター
ポンプＰからの油圧が上昇すると、上記操作部に
加わる推進力Ｆは弾圧バネの付勢力に打ち克つて
操作部３６を共通伝動軸３０の方向（即ち、右向
きＰ）に進出せしめるのである。 Therefore, when the engine speed increases and the oil pressure from the booster pump P increases, the propulsive force F applied to the operating section overcomes the biasing force of the elastic spring and moves the operating section 36 in the direction of the common transmission shaft 30 (i.e. , to the right (P).
斯くしてエンジン回転数が上昇すると共通伝動
軸３０は反時計廻りに回転し、各気筒に対応する
全伝動具８を左向きＱに同時に移動させる。 In this way, when the engine speed increases, the common transmission shaft 30 rotates counterclockwise, and all the transmission devices 8 corresponding to each cylinder are moved in the leftward direction Q at the same time.
従つて、カムフオロア３と燃料噴射用カム２と
の当接部位は当該カム２の接線方向Ａの左向きＱ
に変位するので、時計方向に回転するカム２のカ
ムノーズ２６はカムフオロア３を今までより早く
打ち上げることになり進角調整を自動的に行なう
ことができるのである。 Therefore, the contact portion between the cam follower 3 and the fuel injection cam 2 is directed toward the left in the tangential direction A of the cam 2.
Therefore, the cam nose 26 of the cam 2, which rotates clockwise, launches the cam follower 3 earlier than before, and the advance angle can be adjusted automatically.
逆に、エンジン回転数が低下すると、ブースタ
ー３４の弾圧バネ３７の付勢力が操作部３６に加
わる推進力Ｆに打ち克とうとするので、操作部は
左向きＱに後退する。 Conversely, when the engine speed decreases, the biasing force of the compression spring 37 of the booster 34 tries to overcome the propulsive force F applied to the operating section 36, so the operating section retreats to the left Q.
従つて、共通伝動軸３０は時計廻り方向に回転
し、伝動具８を右方向Ｐに移動させるので、カム
フオロア３と燃料噴射用カム２との当接部位は当
該カムの右向きＰに変位して、カムノーズ２６は
カムフオロア３をより遅く打ち上げることにな
る。 Therefore, the common transmission shaft 30 rotates in the clockwise direction and moves the transmission tool 8 in the right direction P, so that the contact portion between the cam follower 3 and the fuel injection cam 2 is displaced in the right direction P of the cam. , the cam nose 26 will launch the cam follower 3 more slowly.
以上のように、本考案によれば、ブースター１
０を進退駆動して一本の共通伝動軸３０で各気筒
の伝動具８を進角作動させるとともに、伝動具８
を燃料噴射用カム２の接線方向に一次函数的に平
行移動することができる。 As described above, according to the present invention, booster 1
The transmission gear 8 of each cylinder is advanced by one common transmission shaft 30 by driving the transmission gear 8 forward and backward.
can be linearly translated in the tangential direction of the fuel injection cam 2 in a linear function.
よつて、進角用駆動装置１０は、上記実施例の
ようなブースターに限らず、内燃機関の回転数の
上昇を、回転センサーから直接的に、或いは、潤
滑油温、吸・排気温を測る温度センサーから間接
的に検出し、当該センサーに連動したソレノイド
等で共通伝動軸３０を回転させるように構成して
も差し支えない。 Therefore, the advance drive device 10 is not limited to the booster as in the above embodiment, but can also measure the increase in the rotational speed of the internal combustion engine directly from a rotation sensor or by measuring the lubricating oil temperature or intake/exhaust temperature. It is also possible to configure the common transmission shaft 30 to be indirectly detected by a temperature sensor and rotated by a solenoid or the like linked to the sensor.
また、カムフオロア３と燃料噴射用カム２の組
合せとしては、上記実施例に限らず、円弧カム、
接線カム等を通常のタペツトに組合わせても差し
支えない。 Further, the combination of the cam follower 3 and the fuel injection cam 2 is not limited to the above embodiments, and the combination of the cam follower 3 and the fuel injection cam 2 is not limited to the above embodiments.
There is no problem in combining a tangential cam etc. with a normal tappet.
第１図乃至第４図は本考案の実施例を示すもの
で、第１図は進角装置の作動原理図、第２図は縦
型頭上弁式デイーゼルエンジンの要部縦断正面
図、第３図は同エンジンの要部横断平面図、第４
図は３気筒デイーゼルエンジンにおける燃料噴射
装置及びその進角装置の要部概略斜視図、第５図
は従来例を示す第１図相当図である。
１……ユニツトインジエクタ式燃料噴射装置、
２……燃料噴射用カム、３……カムフオロア、４
……プツシユロツド、５……ロツカアーム、６…
…ユニツトインジエクタ、７……６のプランジ
ヤ、８……伝動具、１０……進角用駆動装置、１
１……８の摺動案内部、１２……直線案内部、Ａ
……２の接線方向、Ｅ……内燃機関。
Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a diagram of the operating principle of the advance angle device, Figure 2 is a longitudinal sectional front view of the main parts of a vertical overhead valve type diesel engine, and Figure 3 The figure is a cross-sectional plan view of the main parts of the same engine.
The figure is a schematic perspective view of essential parts of a fuel injection device and its advance device in a three-cylinder diesel engine, and FIG. 5 is a view corresponding to FIG. 1 showing a conventional example. 1...Unit injector type fuel injection device,
2...Fuel injection cam, 3...Cam follower, 4
...Pushyrod, 5...Rotsuka arm, 6...
...Unit injector, 7...Plunger of 6, 8...Transmission device, 10...Advance angle drive device, 1
1... 8 sliding guide part, 12... linear guide part, A
...Tangential direction of 2, E...Internal combustion engine.
Claims (1)
に対応する複数の燃料噴射機構１から成り、各燃
料噴射機構１の燃料噴射用カム２をカムフオロア
３、プツシユロツド４を介して燃料噴射機構１の
プランジヤ７に連動連結し、カムフオロア３を伝
動具８を介して進角用駆動装置１０にカム２の接
線方向Ａに制御駆動可能に連動連結して構成した
内燃機関の燃料噴射装置の進角装置において、 カムフオロア３をタペツトで構成して伝動具８
の摺動案内部１１にカム２の遠心方向Ｂに沿つて
摺動自在に嵌合し、伝動具８を内燃機関Ｅに固定
の直線案内部１２にカムの接線方向Ａに沿つて摺
動自在に嵌合し、各燃料噴射機構１の各伝動具８
の全部を一本の共通伝動軸３０にそれぞれラツク
とピニオンとの噛合せを介して連動連結し、この
共通伝動軸３０を進角用駆動装置１０に連動連結
して構成した事を特徴とする内燃機関の燃料噴射
装置の進角装置。[Scope of claim for utility model registration] The fuel injection device S of the multi-cylinder internal combustion engine E is connected to each cylinder C.
The fuel injection cam 2 of each fuel injection mechanism 1 is interlocked and connected to the plunger 7 of the fuel injection mechanism 1 via a cam follower 3 and a push rod 4, and the cam follower 3 is connected to a transmission tool 8. In the advance angle device of a fuel injection device for an internal combustion engine, the cam follower 3 is constructed of a tappet and the cam follower 3 is connected to the advance drive device 10 so as to be controllably driven in the tangential direction A of the cam 2.
The transmission gear 8 is fitted into the sliding guide part 11 of the cam 2 so as to be slidable along the centrifugal direction B of the cam 2, and the transmission gear 8 is slidably fitted into the linear guide part 12 fixed to the internal combustion engine E along the tangential direction A of the cam. and each transmission tool 8 of each fuel injection mechanism 1
are all interlocked to one common transmission shaft 30 through meshing with a rack and pinion, and this common transmission shaft 30 is interlocked and connected to the advance angle drive device 10. Advance device for fuel injection system of internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4807285U JPH0352992Y2 (en) | 1985-03-29 | 1985-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4807285U JPH0352992Y2 (en) | 1985-03-29 | 1985-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61162549U JPS61162549U (en) | 1986-10-08 |
| JPH0352992Y2 true JPH0352992Y2 (en) | 1991-11-19 |
Family
ID=30563979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4807285U Expired JPH0352992Y2 (en) | 1985-03-29 | 1985-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0352992Y2 (en) |
-
1985
- 1985-03-29 JP JP4807285U patent/JPH0352992Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61162549U (en) | 1986-10-08 |
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