JP2001304070A - Fuel supply system - Google Patents

Fuel supply system

Info

Publication number
JP2001304070A
JP2001304070A JP2000117589A JP2000117589A JP2001304070A JP 2001304070 A JP2001304070 A JP 2001304070A JP 2000117589 A JP2000117589 A JP 2000117589A JP 2000117589 A JP2000117589 A JP 2000117589A JP 2001304070 A JP2001304070 A JP 2001304070A
Authority
JP
Japan
Prior art keywords
camshaft
fuel
fuel supply
cam
bearing
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.)
Pending
Application number
JP2000117589A
Other languages
Japanese (ja)
Inventor
Sadatsugu Inaguma
禎次 稲熊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Toyota Motor Corp
Original Assignee
Denso Corp
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denso Corp, Toyota Motor Corp filed Critical Denso Corp
Priority to JP2000117589A priority Critical patent/JP2001304070A/en
Publication of JP2001304070A publication Critical patent/JP2001304070A/en
Pending legal-status Critical Current

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  • Valve-Gear Or Valve Arrangements (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a fuel supply system for reducing a collision sound generated between a camshaft and a bearing by driving a fuel supply device. SOLUTION: The camshaft 50 is rotatably supported by the bearing 61 arranged on a cylinder head 60. A cup member 71 of a force receiving means 70 slides with a valve cam 51, and transmits driving force of the valve cam 51 to an intake valve. A spring 73 energizes the cup member 71 toward the valve cam 51. An energizing means 80 is arranged on the opposite side of a high pressure supply pump 10 by sandwiching the camshaft 50. When a plunger 20 rises, fuel pressure of a fuel pressurizing chamber 25 suddenly increases, and a tappet 21 presses the camshaft 50 to the intake valve side. The energizing means 80 energizes the camshaft 50 to the high pressure supply pump 10 side so as to reduce force of the tappet 21 for pressing a pressurizing cam 55 to the intake valve side. Thus, impact force of the camshaft 50 colliding with an inner wall of the intake valve side bearing 61 reduces to reduce the collision sound.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、内燃機関(以下
「内燃機関」をエンジンという)に燃料を供給する燃料
供給システムに関するものである。
The present invention relates to an internal combustion engine (hereinafter referred to as an internal combustion engine).
The present invention relates to a fuel supply system that supplies fuel to an “internal combustion engine”.

【0002】[0002]

【従来の技術】従来、プランジャが往復移動することに
より、燃料加圧室に吸入した燃料を加圧し圧送する燃料
供給装置が知られている。特開平8−14140号公報
に開示される燃料供給装置では、吸気弁および排気弁の
少なくとも一方を駆動する弁カムを有するカム軸に、プ
ランジャとともに往復移動するタペットと摺動し、エン
ジンの駆動力をプランジャに伝える加圧カムを設けてい
る。燃料供給装置は、例えばシリンダヘッドカバーに取
り付けられており、カム軸を挟み吸気弁および排気弁と
反対側に位置している。
2. Description of the Related Art Conventionally, there has been known a fuel supply apparatus which pressurizes and sucks fuel sucked into a fuel pressurizing chamber by reciprocating a plunger. In the fuel supply device disclosed in JP-A-8-14140, a camshaft having a valve cam for driving at least one of an intake valve and an exhaust valve slides on a tappet that reciprocates together with a plunger, thereby driving the engine. To the plunger. The fuel supply device is attached to, for example, a cylinder head cover, and is located on the opposite side of the camshaft from the intake valve and the exhaust valve.

【0003】[0003]

【発明が解決しようとする課題】通常カム軸は吸気弁ス
プリングまたは排気弁スプリングの付勢力により燃料供
給装置側に押しつけられている。したがって、カム軸の
軸受けとカム軸とのクリアランスは、吸気弁側または排
気弁側が大きく、燃料供給装置側が小さくなっている。
このような状態において、プランジャが上昇し燃料加圧
室の燃料圧力が急激に上昇すると、タペットは吸気弁側
または排気弁側に加圧カムを押しつける。加圧カムとと
もにカム軸が燃料供給装置と反対側に押しつけられる
と、カム軸が軸受けに衝突し、衝撃音が発生する。本発
明の目的は、燃料供給装置を駆動することにより発生す
るカム軸と軸受けとの衝突音を低減する燃料供給システ
ムを提供することにある。
Normally, the camshaft is pressed against the fuel supply device by the urging force of an intake valve spring or an exhaust valve spring. Therefore, the clearance between the camshaft bearing and the camshaft is larger on the intake valve side or the exhaust valve side, and smaller on the fuel supply device side.
In such a state, when the plunger rises and the fuel pressure in the fuel pressurizing chamber rises sharply, the tappet presses the pressurizing cam toward the intake valve side or the exhaust valve side. When the camshaft is pressed together with the pressure cam on the side opposite to the fuel supply device, the camshaft collides with the bearing, and an impulsive sound is generated. SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel supply system for reducing a collision noise between a camshaft and a bearing generated by driving a fuel supply device.

【0004】[0004]

【課題を解決するための手段】本発明の請求項1記載の
燃料供給システムによると、カム軸の燃料供給装置と反
対側に燃料供給装置側にカム軸を付勢する付勢手段を備
えている。可動部材が上昇し燃料加圧室の圧力が急激に
上昇することにより吸気弁側または排気弁側に加圧カム
およびカム軸が押しつけられても、付勢手段が燃料供給
装置側にカム軸を付勢しているので、吸気弁側または排
気弁側にカム軸を押しつける力が低減する。カム軸が軸
受けと衝突する衝撃力が低減するので、衝撃音が小さく
なる。本発明の請求項2記載の燃料供給システムによる
と、燃料供給装置が加圧カムを押しつける方向と反対方
向に付勢手段が加圧カムを付勢する。したがって、燃料
供給装置がカム軸を押しつける力が低減し、カム軸と軸
受けとの衝突音が小さくなる。
According to the fuel supply system of the present invention, there is provided a biasing means for biasing the camshaft toward the fuel supply device on the side of the camshaft opposite to the fuel supply device. I have. Even if the movable member rises and the pressure in the fuel pressurizing chamber rapidly rises, and the pressurizing cam and the camshaft are pressed against the intake valve side or the exhaust valve side, the urging means moves the camshaft to the fuel supply device side. Because of the urging, the force pressing the camshaft toward the intake valve side or the exhaust valve side is reduced. Since the impact force at which the camshaft collides with the bearing is reduced, the impact noise is reduced. According to the fuel supply system of the second aspect of the present invention, the urging means urges the pressure cam in the direction opposite to the direction in which the fuel supply device presses the pressure cam. Therefore, the force with which the fuel supply device presses the camshaft is reduced, and the collision noise between the camshaft and the bearing is reduced.

【0005】本発明の請求項3記載の燃料供給システム
によると、燃料供給装置を挟んでカム軸の両側に少なく
とも1つずつ付勢手段が配設されているので、付勢手段
が燃料供給装置の両側で均等にカム軸を付勢できる。燃
料供給装置がカム軸を押しつける力を均等に低減できる
ので、カム軸の傾きを防止し、燃料供給装置の両側にお
いてカム軸と軸受けとの衝突音が均等に小さくなる。
According to the fuel supply system of the present invention, at least one urging means is provided on each side of the cam shaft with the fuel supply device interposed therebetween, so that the urging means is provided by the fuel supply device. Can evenly bias the camshaft on both sides. Since the force by which the fuel supply device presses the camshaft can be reduced evenly, the camshaft is prevented from tilting, and the sound of collision between the camshaft and the bearing on both sides of the fuel supply device is evenly reduced.

【0006】付勢手段がカム軸の軸受けから離れた位置
に配設されていると、カム軸が燃料供給装置から受ける
力により軸受けの位置におけるカム軸の撓み量が大きく
なり、カム軸と軸受けとの間で大きな衝撃音が発生する
恐れがある。本発明の請求項4記載の燃料供給システム
によると、付勢手段はカム軸の軸受け近傍に配設されて
いるので、軸受けの位置におけるカム軸の撓み量が小さ
くなり、カム軸と軸受けとの間で発生する衝撃音が小さ
くなる。
If the biasing means is disposed at a position away from the bearing of the camshaft, the camshaft at the position of the bearing becomes large due to the force received from the fuel supply device by the camshaft, and the camshaft and the bearing are displaced. There is a possibility that a loud impact sound may be generated between them. According to the fuel supply system according to the fourth aspect of the present invention, since the biasing means is disposed near the bearing of the camshaft, the amount of deflection of the camshaft at the position of the bearing is reduced, so that the camshaft and the bearing can be displaced. The impact noise generated between them is reduced.

【0007】本発明の請求項5記載の燃料供給システム
によると、付勢手段は燃料供給装置近傍のカム軸の軸受
け近傍に配設されているので、付勢手段と燃料供給装置
との距離が短くなる。したがって、軸受けの位置におけ
るカム軸の撓み量が小さくなり、カム軸と軸受けとの間
で発生する衝撃音が小さくなる。
According to the fuel supply system of the fifth aspect of the present invention, since the urging means is disposed near the bearing of the cam shaft near the fuel supply device, the distance between the urging means and the fuel supply device is reduced. Be shorter. Therefore, the amount of deflection of the cam shaft at the position of the bearing is reduced, and the impact noise generated between the cam shaft and the bearing is reduced.

【0008】[0008]

【発明の実施の形態】本発明の実施の形態を示す複数の
実施例を図に基づいて説明する。 (第1実施例)本発明の第1実施例による燃料供給シス
テムを図1に示す。図1に示すエンジンはDOHC型で
ある。燃料供給装置としての高圧サプライポンプ10
は、シリンダヘッドカバー40に取り付けられている。
高圧サプライポンプ10は、カム軸50に弁カム51と
同軸に設けられた加圧カム55により駆動される。シリ
ンダ12は、高圧サプライポンプ10のハウジング11
に挿入され、焼きばめによりハウジング11に固定され
ている。シリンダ12はプランジャ20を往復移動可能
に支持している。有底円筒状のタペット21はハウジン
グ11に往復移動可能に嵌挿されている。タペット21
はプランジャ20とともに可動部材を構成している。タ
ペット21は外側底面で加圧カム55と摺動し、プラン
ジャ20とともに往復移動する。スプリング22は加圧
カム55に向けタペット21を付勢している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plurality of embodiments showing the embodiments of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 shows a fuel supply system according to a first embodiment of the present invention. The engine shown in FIG. 1 is of the DOHC type. High pressure supply pump 10 as fuel supply device
Is attached to the cylinder head cover 40.
The high-pressure supply pump 10 is driven by a pressurizing cam 55 provided on the camshaft 50 coaxially with the valve cam 51. The cylinder 12 is connected to the housing 11 of the high-pressure supply pump 10.
And is fixed to the housing 11 by shrink fitting. The cylinder 12 supports the plunger 20 so as to be able to reciprocate. A cylindrical tappet 21 with a bottom is fitted into the housing 11 so as to be able to reciprocate. Tappet 21
Constitutes a movable member together with the plunger 20. The tappet 21 slides on the outer bottom surface with the pressure cam 55 and reciprocates with the plunger 20. The spring 22 urges the tappet 21 toward the pressure cam 55.

【0009】電磁弁30は高圧サプライポンプ10の燃
料吐出量を制御するものである。コイル31への通電を
オフすると電磁弁30は開弁し、燃料加圧室25と低圧
通路とが連通する。コイル31への通電をオンすると電
磁弁30は閉弁し、燃料加圧室25と低圧通路との連通
が遮断される。燃料加圧室25の圧力が所定圧以上にな
ると、デリバリバルブ35から燃料が吐出される。
The solenoid valve 30 controls the amount of fuel discharged from the high-pressure supply pump 10. When the power supply to the coil 31 is turned off, the solenoid valve 30 opens, and the fuel pressurizing chamber 25 and the low-pressure passage communicate with each other. When energization of the coil 31 is turned on, the electromagnetic valve 30 closes, and communication between the fuel pressurizing chamber 25 and the low-pressure passage is cut off. When the pressure in the fuel pressurizing chamber 25 becomes equal to or higher than a predetermined pressure, the fuel is discharged from the delivery valve 35.

【0010】カム軸50はシリンダヘッド60に設けら
れた軸受け61に回転可能に支持されている。通路62
を介し軸受け61に潤滑油が供給されている。カム軸5
0は、高圧サプライポンプ10を駆動する加圧カム55
に加え、図示しない吸気弁を駆動する弁カム51を、各
気筒毎に2個有している。
The cam shaft 50 is rotatably supported by a bearing 61 provided on a cylinder head 60. Passage 62
The lubricating oil is supplied to the bearing 61 via the. Camshaft 5
0 is a pressurizing cam 55 for driving the high-pressure supply pump 10.
In addition, each cylinder has two valve cams 51 for driving an intake valve (not shown).

【0011】弁カム51から駆動力を受ける各吸気弁の
受力手段70の構成は同じである。受力手段70は、有
底円筒状に形成されたカップ部材71、スプリング座7
2およびスプリング73を有している。カップ部材71
は弁カム51と摺動し、弁カム51の駆動力を吸気弁に
伝える。スプリング座72は吸気弁のロッド65と結合
し、スプリング73によりカップ部材71の内側底面、
つまり弁カム51に向け付勢されている。
The structure of the force receiving means 70 of each intake valve receiving the driving force from the valve cam 51 is the same. The force receiving means 70 includes a cup member 71 formed in a cylindrical shape with a bottom and a spring seat 7.
2 and a spring 73. Cup member 71
Slides with the valve cam 51 to transmit the driving force of the valve cam 51 to the intake valve. The spring seat 72 is connected to the rod 65 of the intake valve, and the inner surface of the cup member 71 is
That is, it is biased toward the valve cam 51.

【0012】付勢手段80は、カム軸50を挟んで高圧
サプライポンプ10の反対側に、高圧サプライポンプ1
0を挟んでカム軸50の両側に高圧サプライポンプ10
から等距離に1つずつ配設されている。図2に示すよう
に、付勢手段80は、有底円筒状に形成された支持部材
81、ローラ軸82、ローラ83およびスプリング84
を有している。支持部材81のカム軸50側にローラ軸
82が固定され、このローラ軸82にローラ83が回転
可能に支持されている。ローラ83は付勢手段80とカ
ム軸50との摺動抵抗を低減するものであり、カム軸5
0の回転に伴い回転する。スプリング84はカム軸50
に向け支持部材81を付勢している。
The urging means 80 is provided on the opposite side of the high-pressure supply pump 10
0, the high-pressure supply pump 10
Are arranged one at a distance from each other. As shown in FIG. 2, the urging means 80 includes a support member 81 formed in a cylindrical shape with a bottom, a roller shaft 82, a roller 83, and a spring 84.
have. A roller shaft 82 is fixed to the cam shaft 50 side of the support member 81, and a roller 83 is rotatably supported by the roller shaft 82. The roller 83 reduces the sliding resistance between the urging means 80 and the camshaft 50, and
It rotates with the rotation of 0. The spring 84 is the camshaft 50
The support member 81 is biased toward.

【0013】次に、燃料供給システムの作動について、
(1) 燃料の吸入行程、(2) 燃料の加圧圧送行程に分け
て説明する。 (1) 燃料の吸入行程 カム軸50の回転に伴い加圧カム55が回転し、タペッ
ト21とともにプランジャ20が往復移動する。プラン
ジャ20が上死点に達すると、電磁弁30のコイル31
への通電がオフされ、電磁弁50は開弁状態となる。そ
して、プランジャ20が上死点から下死点に向け下降す
ることにより、図示しない燃料ポンプから吐出された低
圧燃料が、燃料加圧室25に吸入される。そしてプラン
ジャ20が下死点に位置するとき、燃料加圧室25に最
大量の低圧燃料が吸入されている。
Next, regarding the operation of the fuel supply system,
A description will be given of (1) a fuel suction stroke and (2) a fuel pressurization and pressure feeding stroke. (1) Fuel Intake Process The pressurizing cam 55 rotates with the rotation of the camshaft 50, and the plunger 20 reciprocates together with the tappet 21. When the plunger 20 reaches the top dead center, the coil 31 of the solenoid valve 30
Is turned off, and the solenoid valve 50 is opened. When the plunger 20 descends from the top dead center to the bottom dead center, low-pressure fuel discharged from a fuel pump (not shown) is sucked into the fuel pressurizing chamber 25. When the plunger 20 is located at the bottom dead center, the maximum amount of low-pressure fuel is sucked into the fuel pressurizing chamber 25.

【0014】(2) 燃料の加圧圧送行程 プランジャ20が上死点に移動する行程において、所望
の燃料吐出量に対応した位置にプランジャ20が到達し
たとき、エンジン制御装置(ECU)により電磁弁30
のコイル31への通電がオンされ、電磁弁30は閉弁状
態となる。プランジャ20がさらに上死点側に移動する
と、燃料加圧室25の燃料は高圧となり、デリバリバル
ブ35から高圧燃料が吐出される。
(2) Pressurizing and Pressure Feeding Process of Fuel In the process of moving the plunger 20 to the top dead center, when the plunger 20 reaches a position corresponding to a desired fuel discharge amount, a solenoid valve is controlled by an engine control unit (ECU). 30
Is turned on, and the solenoid valve 30 is closed. When the plunger 20 further moves toward the top dead center, the fuel in the fuel pressurizing chamber 25 becomes high pressure, and the high pressure fuel is discharged from the delivery valve 35.

【0015】電磁弁30が閉弁しプランジャ20が上死
点側に移動すると、燃料加圧室25の燃料圧力は急激に
上昇する。燃料加圧室25の急激な燃料圧力の上昇によ
り、タペット21は吸気弁側に向け加圧カム55を押し
つける。タペット21が加圧カム55を押しつけていな
い状態では、受力手段70のスプリング73の付勢力に
より、カム軸50は高圧サプライポンプ10側に押しつ
けられている。したがって、カム軸50が軸受け61と
形成するクリアランスは、高圧サプライポンプ10側が
小さく、吸気弁側が大きくなっている。このような状態
で燃料加圧室25の燃料圧力が急激に上昇し、タペット
21が吸気弁側に加圧カム55を押しつけると、カム軸
50が吸気弁側の軸受け61の内壁と衝突しようとす
る。しかし、付勢手段80が高圧サプライポンプ10側
にカム軸50を付勢しているので、タペット21が吸気
弁側に加圧カム55を押しつける力が低減する。したが
って、カム軸50が吸気弁側の軸受け61の内壁と衝突
する衝撃力が低減し、衝突音が小さくなる。また、付勢
手段80がカム軸50を直接付勢しているので、付勢手
段80の付勢力がカム軸50に加わっても、カム軸50
が受ける駆動力の変動は小さくてすむ。
When the solenoid valve 30 is closed and the plunger 20 moves toward the top dead center, the fuel pressure in the fuel pressurizing chamber 25 sharply increases. The tappet 21 presses the pressurizing cam 55 toward the intake valve side due to the rapid increase in the fuel pressure in the fuel pressurizing chamber 25. When the tappet 21 is not pressing the pressure cam 55, the cam shaft 50 is pressed against the high-pressure supply pump 10 by the urging force of the spring 73 of the receiving means 70. Therefore, the clearance formed by the camshaft 50 with the bearing 61 is smaller on the high pressure supply pump 10 side and larger on the intake valve side. In such a state, when the fuel pressure in the fuel pressurizing chamber 25 sharply increases and the tappet 21 presses the pressurizing cam 55 toward the intake valve, the camshaft 50 tries to collide with the inner wall of the bearing 61 on the intake valve side. I do. However, since the urging means 80 urges the cam shaft 50 toward the high-pressure supply pump 10, the force of the tappet 21 pressing the pressure cam 55 toward the intake valve is reduced. Accordingly, the impact force of the camshaft 50 colliding with the inner wall of the bearing 61 on the intake valve side is reduced, and the collision noise is reduced. Further, since the urging means 80 directly urges the cam shaft 50, even if the urging force of the urging means 80 is applied to the cam shaft 50,
The fluctuation of the driving force to be received is small.

【0016】第1実施例では、高圧サプライポンプ10
を挟んでカム軸50の両側に高圧サプライポンプ10か
ら等距離に1つずつ付勢手段80が配設されているの
で、付勢手段80が高圧サプライポンプ10の両側で均
等にカム軸50を付勢している。高圧サプライポンプ1
0が吸気弁側にカム軸50を押しつける力を均等に低減
できるので、カム軸50の傾きを防止し、高圧サプライ
ポンプ10の両側で発生するカム軸50と軸受け61と
の衝突音が均等に小さくなる。
In the first embodiment, the high-pressure supply pump 10
The urging means 80 are disposed one at a distance from the high-pressure supply pump 10 on both sides of the cam shaft 50 with the urging means 80 interposed therebetween. It is energizing. High pressure supply pump 1
0 can evenly reduce the force pressing the camshaft 50 against the intake valve, thereby preventing the camshaft 50 from tilting and uniformly reducing the collision noise between the camshaft 50 and the bearing 61 generated on both sides of the high-pressure supply pump 10. Become smaller.

【0017】付勢手段80を配置する位置は、周囲部品
との位置関係を考慮し可能な限り高圧サプライポンプ1
0に近く、かつ軸受け61に近いことが望ましい。これ
は、高圧サプライポンプ10と付勢手段80との距離を
近づけることにより、高圧サプライポンプ10と付勢手
段80との間で撓むカム軸50の撓み量を小さくするた
めである。また、付勢手段80が軸受け61に近いほ
ど、軸受け61と付勢手段80との間で撓むカム軸50
の撓み量が小さくなる。カム軸50の撓み量が小さくな
ると、カム軸50と軸受け61とが衝突し発生する衝突
音が小さくなる。
The position at which the urging means 80 is disposed is determined as high as possible in consideration of the positional relationship with surrounding parts.
It is desirable to be close to 0 and close to the bearing 61. This is because the distance between the high-pressure supply pump 10 and the urging means 80 is reduced to reduce the amount of deflection of the camshaft 50 that bends between the high-pressure supply pump 10 and the urging means 80. Further, the closer the biasing means 80 is to the bearing 61, the more the camshaft 50 is bent between the bearing 61 and the biasing means 80.
Becomes small. When the amount of deflection of the camshaft 50 decreases, the collision noise generated when the camshaft 50 collides with the bearing 61 decreases.

【0018】(第2実施例)本発明の第2実施例を図3
および図4に示す。図4は高圧サプライポンプ10だけ
を図3の断面にした図3のIV−IV線断面図である。第1
実施例と実質的に同一構成部分に同一符号を付す。付勢
手段90は加圧カム55を挟んで高圧サプライポンプ1
0の反対側に配設されている。
(Second Embodiment) FIG. 3 shows a second embodiment of the present invention.
And FIG. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3 in which only the high-pressure supply pump 10 has a cross section of FIG. First
The same reference numerals are given to the same components as those in the embodiment. The urging means 90 is provided between the high-pressure supply pump 1 and the pressure cam 55.
It is arranged on the opposite side of 0.

【0019】付勢手段90は、有底円筒状の摺動部材9
1と、加圧カム55に向け摺動部材91を付勢するスプ
リング92とを有している。第2実施例では、燃料加圧
室25の高圧燃料から受ける力によりタペット21が加
圧カム55を押しつける方向と反対方向に、付勢手段9
0が加圧カム55を付勢している。したがって、タペッ
ト21が吸気弁側にカム軸50を押しつける力が低減
し、カム軸50と軸受け61との衝突音が小さくなる。
The urging means 90 includes a cylindrical sliding member 9 having a bottom.
1 and a spring 92 for urging the sliding member 91 toward the pressing cam 55. In the second embodiment, the urging means 9 is moved in the direction opposite to the direction in which the tappet 21 presses the pressure cam 55 by the force received from the high-pressure fuel in the fuel pressurization chamber 25.
0 urges the pressure cam 55. Therefore, the force with which the tappet 21 presses the camshaft 50 toward the intake valve side is reduced, and the collision noise between the camshaft 50 and the bearing 61 is reduced.

【0020】以上説明した本発明の上記複数の実施例で
は、スプリングの付勢力により付勢手段が高圧サプライ
ポンプ10に向けカム軸50を付勢している。スプリン
グ以外に、例えば油圧により高圧サプライポンプ10に
向けカム軸50を付勢することも可能である。
In the embodiments of the present invention described above, the urging means urges the cam shaft 50 toward the high-pressure supply pump 10 by the urging force of the spring. In addition to the spring, the camshaft 50 may be biased toward the high-pressure supply pump 10 by, for example, hydraulic pressure.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の第1実施例による燃料供給システムを
示す断面図である。
FIG. 1 is a sectional view showing a fuel supply system according to a first embodiment of the present invention.

【図2】図1のII−II線断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.

【図3】本発明の第2実施例による燃料供給システムを
示す断面図である。
FIG. 3 is a sectional view showing a fuel supply system according to a second embodiment of the present invention.

【図4】高圧サプライポンプだけを図3の断面にした図
3のIV−IV線断面図である。
4 is a cross-sectional view taken along line IV-IV of FIG. 3, in which only the high-pressure supply pump is formed as a cross section of FIG.

【符号の説明】[Explanation of symbols]

10 高圧サプライポンプ(燃料供給装置) 20 プランジャ(可動部材) 21 タペット(可動部材) 25 燃料加圧室 40 シリンダヘッドカバー 50 カム軸 51 弁カム 55 加圧カム 60 シリンダヘッド 61 軸受け 70 受力手段 80 付勢手段 81 支持部材 83 ローラ 84 スプリング 90 付勢手段 91 摺動部材 92 スプリング Reference Signs List 10 high-pressure supply pump (fuel supply device) 20 plunger (movable member) 21 tappet (movable member) 25 fuel pressurizing chamber 40 cylinder head cover 50 cam shaft 51 valve cam 55 pressurizing cam 60 cylinder head 61 bearing 70 receiving force means 80 Urging means 81 support member 83 roller 84 spring 90 urging means 91 sliding member 92 spring

フロントページの続き Fターム(参考) 3G016 AA02 AA06 AA19 BA03 BA28 BA30 BB02 GA02 3G066 AA01 AB01 AD01 BA18 BA22 BA65 CA01S CA09 CC53 CD04 CE02 DB15 DC03 Continued on the front page F-term (reference) 3G016 AA02 AA06 AA19 BA03 BA28 BA30 BB02 GA02 3G066 AA01 AB01 AD01 BA18 BA22 BA65 CA01S CA09 CC53 CD04 CE02 DB15 DC03

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 可動部材の往復移動により燃料加圧室に
吸入した燃料を加圧し圧送する燃料供給装置と、 吸気弁および排気弁の少なくとも一方を駆動する弁カム
および前記可動部材を駆動する加圧カムを有するカム軸
と、 前記カム軸の前記燃料供給装置と反対側に配設され、前
記燃料供給装置側に前記カム軸を付勢する付勢手段と、 を備えることを特徴とする燃料供給システム。
1. A fuel supply device for pressurizing and feeding fuel sucked into a fuel pressurizing chamber by reciprocating movement of a movable member, a valve cam for driving at least one of an intake valve and an exhaust valve, and a valve for driving the movable member. A fuel shaft, comprising: a cam shaft having a pressure cam; and a biasing means disposed on a side of the cam shaft opposite to the fuel supply device and biasing the cam shaft toward the fuel supply device. Feeding system.
【請求項2】 前記付勢手段は、前記燃料供給装置に向
け前記加圧カムを付勢することを特徴とする請求項1記
載の燃料供給システム。
2. The fuel supply system according to claim 1, wherein the urging means urges the pressure cam toward the fuel supply device.
【請求項3】 前記付勢手段は、前記燃料供給装置を挟
んで前記カム軸の両側に少なくとも1つずつ配設されて
いることを特徴とする請求項1または2記載の燃料供給
システム。
3. The fuel supply system according to claim 1, wherein at least one of the urging means is disposed on both sides of the cam shaft with the fuel supply device interposed therebetween.
【請求項4】 前記付勢手段は、前記カム軸の軸受け近
傍に配設されていることを特徴とする請求項1、2また
は3記載の燃料供給システム。
4. The fuel supply system according to claim 1, wherein the biasing means is disposed near a bearing of the camshaft.
【請求項5】 前記付勢手段は、前記燃料供給装置近傍
の前記軸受け近傍に配設されていることを特徴とする請
求項4記載の燃料供給システム。
5. The fuel supply system according to claim 4, wherein said urging means is disposed near said bearing near said fuel supply device.
JP2000117589A 2000-04-19 2000-04-19 Fuel supply system Pending JP2001304070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000117589A JP2001304070A (en) 2000-04-19 2000-04-19 Fuel supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000117589A JP2001304070A (en) 2000-04-19 2000-04-19 Fuel supply system

Publications (1)

Publication Number Publication Date
JP2001304070A true JP2001304070A (en) 2001-10-31

Family

ID=18628885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000117589A Pending JP2001304070A (en) 2000-04-19 2000-04-19 Fuel supply system

Country Status (1)

Country Link
JP (1) JP2001304070A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007262981A (en) * 2006-03-28 2007-10-11 Mitsubishi Motors Corp Variable valve gear of internal combustion engine
JP2010180867A (en) * 2009-02-09 2010-08-19 Honda Motor Co Ltd High pressure pump mounting structure in internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007262981A (en) * 2006-03-28 2007-10-11 Mitsubishi Motors Corp Variable valve gear of internal combustion engine
JP4696273B2 (en) * 2006-03-28 2011-06-08 三菱自動車工業株式会社 Variable valve operating device for internal combustion engine
JP2010180867A (en) * 2009-02-09 2010-08-19 Honda Motor Co Ltd High pressure pump mounting structure in internal combustion engine

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