JP2008291783A - Fuel injection device for internal combustion engine - Google Patents

Fuel injection device for internal combustion engine Download PDF

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Publication number
JP2008291783A
JP2008291783A JP2007139415A JP2007139415A JP2008291783A JP 2008291783 A JP2008291783 A JP 2008291783A JP 2007139415 A JP2007139415 A JP 2007139415A JP 2007139415 A JP2007139415 A JP 2007139415A JP 2008291783 A JP2008291783 A JP 2008291783A
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fuel
fuel injection
internal combustion
combustion engine
valve
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Takashi Nakano
敬士 中野
Naoya Hashii
直也 橋居
Takeshi Munezane
毅 宗実
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel injection device for an internal combustion engine, using heat of an intake valve without any additional heating device to gasify fuel in an intake pipe to reduce discharge of unburnt carbon hydride by incomplete combustion of the fuel. <P>SOLUTION: The fuel injection device for an internal combustion engine comprises: a fuel injection valve 3 attached to the intake pipe 1 disposed upstream of the intake valve 6 and injecting the fuel 2 into the intake pipe 1; and a deflection part 8 disposed to be opposed to the fuel injection valve 3 to reflect the fuel 2 injected from the fuel injection valve 3 to deflect an injection direction of the fuel 2 toward an intake valve 6 side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、吸気弁の上流側に設けられた吸気管に取り付けられ、吸気管内に燃料を噴射する燃料噴射弁を備えた内燃機関の燃料噴射装置に関する。   The present invention relates to a fuel injection device for an internal combustion engine provided with a fuel injection valve that is attached to an intake pipe provided upstream of an intake valve and injects fuel into the intake pipe.

従来、吸気弁の上流側に設けられた吸気管に取り付けられ、前記吸気管内に燃料を噴射する燃料噴射弁と、前記吸気管の内壁に設けられ、前記燃料噴射弁から噴射された前記燃料に衝突されて、前記燃料を加熱して気化させる加熱板とを備えた内燃機関の燃料噴射装置が知られている(例えば、特許文献1参照)。
このものでは、加熱板からの熱を利用して、吸気管内の燃料を気化させることで、燃料の不完全燃焼による未燃炭化水素(HC)が排出されるのを低減させる。
Conventionally, a fuel injection valve that is attached to an intake pipe provided on the upstream side of the intake valve and injects fuel into the intake pipe, and is provided on an inner wall of the intake pipe and is injected into the fuel injected from the fuel injection valve. There is known a fuel injection device for an internal combustion engine that includes a heating plate that collides and heats and vaporizes the fuel (see, for example, Patent Document 1).
In this case, by using the heat from the heating plate, the fuel in the intake pipe is vaporized to reduce the emission of unburned hydrocarbons (HC) due to incomplete combustion of the fuel.

特開2004−278466号公報JP 2004-278466 A

しかしながら、このものの場合、加熱板を加熱するための加熱装置を新たに設けなければならず、装置全体が複雑になってしまうという問題点があった。   However, in this case, there is a problem that a heating device for heating the heating plate must be newly provided, and the entire device becomes complicated.

この発明は、上述のような問題点を解決することを課題とするものであって、その目的は、加熱装置を新たに設けることなく、吸気弁の熱を利用することで、吸気管内の燃料が気化されて、燃料の不完全燃焼による未燃炭化水素が排出されるのを低減させることができる内燃機関の燃料噴射装置を提供するものである。   An object of the present invention is to solve the above-described problems, and an object of the present invention is to use the heat of the intake valve without newly providing a heating device so that the fuel in the intake pipe can be obtained. The present invention provides a fuel injection device for an internal combustion engine that can reduce the emission of unburned hydrocarbons due to incomplete combustion of fuel.

この発明に係る内燃機関の燃料噴射装置は、吸気弁の上流側に設けられた吸気管に取り付けられ、前記吸気管内に燃料を噴射する燃料噴射弁と、前記燃料噴射弁に対向して設けられ、前記燃料噴射弁から噴射された前記燃料を反射させて、前記燃料の噴射方向を前記吸気弁側に向かって偏向させる偏向部とを備えている。   A fuel injection device for an internal combustion engine according to the present invention is attached to an intake pipe provided upstream of an intake valve, and is provided opposite to the fuel injection valve and a fuel injection valve that injects fuel into the intake pipe. And a deflecting unit that reflects the fuel injected from the fuel injection valve and deflects the fuel injection direction toward the intake valve.

この発明に係る内燃機関の燃料噴射装置によれば、加熱装置を新たに設けることなく、吸気弁の熱を利用することで、吸気管内の燃料が気化されて、燃料の不完全燃焼による未燃炭化水素が排出されるのを低減させることができる。   According to the fuel injection device for an internal combustion engine according to the present invention, the fuel in the intake pipe is vaporized by using the heat of the intake valve without newly providing a heating device, and unburned due to incomplete combustion of the fuel. The emission of hydrocarbons can be reduced.

以下、この発明の各実施の形態を図に基づいて説明するが、各図において、同一または相当の部材、部位については、同一符号を付して説明する。
実施の形態1.
図1は実施の形態1に係る内燃機関の燃料噴射装置の断面図、図2は図1のII−IIに沿った矢視断面図である。
実施の形態1に係る内燃機関の燃料噴射装置は、内部に一対の吸気孔1aが形成された吸気管1に設けられ吸気孔1a内に霧状の燃料2を噴射する燃料噴射弁3を備えている。
吸気管1の下流側端部には、内部に吸気孔1aと連通した一対の連通孔4aが形成されたエンジンヘッド4が設けられている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.
Embodiment 1 FIG.
1 is a cross-sectional view of a fuel injection device for an internal combustion engine according to Embodiment 1, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
A fuel injection device for an internal combustion engine according to Embodiment 1 includes a fuel injection valve 3 provided in an intake pipe 1 having a pair of intake holes 1a formed therein and injecting mist-like fuel 2 into the intake holes 1a. ing.
An engine head 4 in which a pair of communication holes 4 a communicating with the intake holes 1 a is formed inside is provided at the downstream end of the intake pipe 1.

連通孔4aの下流側端部には、連通孔4aを通って流入した燃料2が燃焼する燃焼室5が形成されており、エンジンヘッド4には、連通孔4aを開閉することで、連通孔4aから燃焼室5へ流入する燃料2の量を調節する一対の吸気弁6が設けられている。
燃料噴射弁3は、それぞれの吸気孔1a内に向かって、2方向に分岐して燃料2を噴射する。
A combustion chamber 5 in which the fuel 2 that has flowed through the communication hole 4a burns is formed at the downstream end of the communication hole 4a. The engine head 4 has a communication hole by opening and closing the communication hole 4a. A pair of intake valves 6 for adjusting the amount of fuel 2 flowing from 4a to the combustion chamber 5 are provided.
The fuel injection valve 3 branches in two directions toward the respective intake holes 1a and injects the fuel 2.

また、この内燃機関の燃料噴射装置は、連通孔4aの内壁7に、燃料噴射弁3から噴射された燃料2を反射して、燃料2の噴射方向を吸気弁6側に向かって偏向させる平板形状の偏向部8を備えている。
図3は燃料噴射弁3から噴射される燃料2の噴射方向と偏向部8とのなす角であって反吸気弁6側の角度αと、偏向部8への燃料2の付着率との関係を示した図である。
図3により、角度αが、35°より大きく55°より小さい場合には、偏向部8への燃料2の付着率が低いことがわかる。
燃料噴射弁3および偏向部8は、角度αが35°より大きく55°より小さくなるように、配置されている。
これにより、燃料噴射弁3から噴射された燃料2が偏向部8に付着するのを低減させることができる。
In addition, the fuel injection device for the internal combustion engine reflects the fuel 2 injected from the fuel injection valve 3 to the inner wall 7 of the communication hole 4a and deflects the injection direction of the fuel 2 toward the intake valve 6 side. A deflecting portion 8 having a shape is provided.
FIG. 3 shows the angle between the injection direction of the fuel 2 injected from the fuel injection valve 3 and the deflection portion 8 and the angle α on the side opposite to the intake valve 6 and the adhesion rate of the fuel 2 to the deflection portion 8. FIG.
FIG. 3 shows that when the angle α is larger than 35 ° and smaller than 55 °, the adhesion rate of the fuel 2 to the deflecting portion 8 is low.
The fuel injection valve 3 and the deflecting unit 8 are arranged so that the angle α is larger than 35 ° and smaller than 55 °.
Thereby, it can reduce that the fuel 2 injected from the fuel injection valve 3 adheres to the deflection | deviation part 8. FIG.

次に、実施の形態1に係る内燃機関の燃料噴射装置の動作について説明する。
まず、吸気弁6が閉じている状態で、燃料噴射弁3から燃料2が広がりながら噴射される。
燃料噴射弁3から噴射された燃料2は偏向部8で反射され、燃料2の噴射方向が吸気弁6側に向かって偏向されて、燃料2が吸気弁6に接触する。
吸気弁6は、燃焼室5の近くに配置されているので、燃焼室5からの熱が伝達されており、高温状態となっている。
高温状態の吸気弁6に接触した燃料2は、容易に気化する。
吸気弁6が開くことで気化した燃料2および空気が燃焼室5に導かれ、燃焼室5内で燃料2が点火されて燃焼する。
燃料2が気化した後に燃焼室5へ流入するので、燃料2の完全燃焼が行われ、未燃炭化水素(HC)の発生が低減される。
Next, the operation of the fuel injection device for the internal combustion engine according to the first embodiment will be described.
First, while the intake valve 6 is closed, the fuel 2 is injected from the fuel injection valve 3 while spreading.
The fuel 2 injected from the fuel injection valve 3 is reflected by the deflecting unit 8, the injection direction of the fuel 2 is deflected toward the intake valve 6, and the fuel 2 comes into contact with the intake valve 6.
Since the intake valve 6 is disposed near the combustion chamber 5, the heat from the combustion chamber 5 is transmitted, and the intake valve 6 is in a high temperature state.
The fuel 2 in contact with the intake valve 6 in a high temperature state is easily vaporized.
The fuel 2 and air vaporized by opening the intake valve 6 are guided to the combustion chamber 5, and the fuel 2 is ignited and combusted in the combustion chamber 5.
Since the fuel 2 is vaporized and then flows into the combustion chamber 5, the fuel 2 is completely burned, and the generation of unburned hydrocarbons (HC) is reduced.

以上説明したように、実施の形態1に係る内燃機関の燃料噴射装置によると、燃料2を噴射する燃料噴射弁3と、燃料噴射弁3から噴射された燃料2を反射させて、燃料2の噴射方向を吸気弁6側に向かって偏向させる偏向部8とを備えているので、加熱装置を設けることなく、吸気弁6の熱を利用することで、吸気管1内の燃料2が気化されて、燃料2の不完全燃焼による未燃炭化水素(HC)が排出されるのを低減させることができる。
また、吸気弁6の近傍に燃料噴射弁3を設けるスペースが無く、燃料噴射弁3から噴射された燃料2を吸気弁6に直接当てることができない場合に、吸気弁6から離れた位置に燃料噴射弁3を配置しても、偏向部8により燃料2を反射し、燃料2の噴射方向を吸気弁6側に向かって偏向させて、燃料噴射弁3から噴射された燃料2を吸気弁6に当てることができる。
As described above, according to the fuel injection device for an internal combustion engine according to the first embodiment, the fuel injection valve 3 for injecting the fuel 2 and the fuel 2 injected from the fuel injection valve 3 are reflected to Since the deflecting portion 8 that deflects the injection direction toward the intake valve 6 is provided, the fuel 2 in the intake pipe 1 is vaporized by using the heat of the intake valve 6 without providing a heating device. Thus, emission of unburned hydrocarbons (HC) due to incomplete combustion of the fuel 2 can be reduced.
In addition, when there is no space for providing the fuel injection valve 3 in the vicinity of the intake valve 6 and the fuel 2 injected from the fuel injection valve 3 cannot be directly applied to the intake valve 6, the fuel is disposed at a position away from the intake valve 6. Even when the injection valve 3 is disposed, the fuel 2 is reflected by the deflecting unit 8, the injection direction of the fuel 2 is deflected toward the intake valve 6, and the fuel 2 injected from the fuel injection valve 3 is taken into the intake valve 6. Can be applied.

また、偏向部8は平面形状であるので、簡単に、燃料2を反射させて、燃料2の噴射方向を吸気弁6側に向かって偏向させることができる。   Further, since the deflecting portion 8 has a planar shape, it is possible to easily reflect the fuel 2 and deflect the injection direction of the fuel 2 toward the intake valve 6 side.

また、燃料噴射弁3から噴射される燃料2の噴射方向と偏向部8とのなす角であって、反吸気弁6側の角度αが、35°より大きく、55°より小さく設定されているので、燃料2が偏向部8に付着することを低減させることができる。   Further, the angle formed between the injection direction of the fuel 2 injected from the fuel injection valve 3 and the deflecting unit 8 and the angle α on the side of the anti-intake valve 6 is set to be larger than 35 ° and smaller than 55 °. Therefore, it can reduce that the fuel 2 adheres to the deflection | deviation part 8. FIG.

実施の形態2.
図4は実施の形態2に係る内燃機関の燃料噴射装置の断面図、図5は図4のV−V線に沿った矢視断面図である。
実施の形態2に係る内燃機関の燃料噴射装置は、連通孔4aの内壁7に、燃料噴射弁3から噴射された燃料2を反射して、燃料2の噴射方向を吸気弁6側に向かって偏向させる球面形状の偏向部8を備えている。この偏向部8は、連通孔4aの径方向外側へ凹んだ球面形状となっている。
偏向部8を球面形状にすることで、偏向部8で反射された燃料2の広がりを抑制することができる。
これにより、燃料2の噴射方向を、より効果的に吸気弁6に向かって偏向させることができる。
燃料噴射弁3から噴射される燃料2の噴射方向と、この燃料2が衝突する偏向部8の曲面上の点における接線とのなす角であって、反吸気弁6側の角度は、35°より大きく、55°より小さくなるようになっている。
これにより、燃料噴射弁3から噴射された燃料2が偏向部8に付着するのを低減させることができる。
その他の構成は実施の形態1と同様である。
Embodiment 2. FIG.
4 is a cross-sectional view of a fuel injection device for an internal combustion engine according to Embodiment 2, and FIG. 5 is a cross-sectional view taken along line VV in FIG.
In the fuel injection device for an internal combustion engine according to the second embodiment, the fuel 2 injected from the fuel injection valve 3 is reflected on the inner wall 7 of the communication hole 4a, and the injection direction of the fuel 2 is directed toward the intake valve 6 side. A spherical deflecting portion 8 for deflecting is provided. The deflecting portion 8 has a spherical shape that is recessed outward in the radial direction of the communication hole 4a.
By making the deflection portion 8 spherical, the spread of the fuel 2 reflected by the deflection portion 8 can be suppressed.
Thereby, the injection direction of the fuel 2 can be deflected toward the intake valve 6 more effectively.
The angle formed by the injection direction of the fuel 2 injected from the fuel injection valve 3 and the tangent at the point on the curved surface of the deflecting portion 8 on which the fuel 2 collides, and the angle on the anti-intake valve 6 side is 35 °. It is larger and smaller than 55 °.
Thereby, it can reduce that the fuel 2 injected from the fuel injection valve 3 adheres to the deflection | deviation part 8. FIG.
Other configurations are the same as those of the first embodiment.

実施の形態2に係る内燃機関の燃料噴射装置によると、偏向部8が吸気管1の径方向外側へ凹んだ球面形状であるので、燃料2をより効果的に吸気弁6に向かって偏向させることができる。   According to the fuel injection device for an internal combustion engine according to the second embodiment, since the deflecting portion 8 has a spherical shape that is recessed outward in the radial direction of the intake pipe 1, the fuel 2 is deflected more effectively toward the intake valve 6. be able to.

実施の形態3.
図6は実施の形態3に係る内燃機関の燃料噴射装置の断面図である。
実施の形態3に係る内燃機関の燃料噴射装置は、平板形状をした偏向部8の表面に、フッ素から構成された撥油性の被膜9を備えている。
なお、被膜9はフッ素に限らず、例えば、ガラス珪素等から構成されてもよい。
これにより、偏向部8に衝突した燃料2が、偏向部8に付着することをさらに防ぐことができ、より効果的に燃料2を反射させ、燃料2の噴射方向を吸気弁6側に向かって偏向させることができる。
その他の構成は実施の形態1と同様である。
Embodiment 3 FIG.
FIG. 6 is a cross-sectional view of a fuel injection device for an internal combustion engine according to the third embodiment.
The fuel injection device for an internal combustion engine according to Embodiment 3 includes an oil-repellent coating 9 made of fluorine on the surface of a deflecting portion 8 having a flat plate shape.
The coating 9 is not limited to fluorine, and may be made of, for example, glass silicon.
Thereby, it is possible to further prevent the fuel 2 colliding with the deflecting unit 8 from adhering to the deflecting unit 8, more effectively reflect the fuel 2, and make the injection direction of the fuel 2 toward the intake valve 6 side. Can be deflected.
Other configurations are the same as those of the first embodiment.

実施の形態3に係る内燃機関の燃料噴射装置によると、偏向部8の表面には、撥油性の被膜9が設けられているので、燃料2が偏向部8に付着することをより低減させることができる。   According to the fuel injection device for an internal combustion engine according to the third embodiment, since the oil repellent coating 9 is provided on the surface of the deflection unit 8, it is possible to further reduce the adhesion of the fuel 2 to the deflection unit 8. Can do.

なお、上記実施の形態3では、平板形状をした偏向部8の表面に撥油性の被膜9が設けられた内燃機関の燃料噴射装置について説明したが、勿論このものに限らず、球面形状をした偏向部8の表面に撥油性の被膜9が設けられた内燃機関の燃料噴射装置であってもよい。   In the third embodiment, the fuel injection device for the internal combustion engine in which the oil repellent coating 9 is provided on the surface of the deflecting portion 8 having a flat plate shape has been described. A fuel injection device for an internal combustion engine in which an oil-repellent coating 9 is provided on the surface of the deflection unit 8 may be used.

また、上記各実施の形態では、エンジンヘッド4の連通孔4aの内壁7に偏向部8が設けられた内燃機関の燃料噴射装置について説明したが、勿論このものに限らず、吸気管1の吸気孔1aの内壁に偏向部8が設けられた内燃機関の燃料噴射装置であってもよい。   In each of the above embodiments, the fuel injection device for an internal combustion engine in which the deflection portion 8 is provided on the inner wall 7 of the communication hole 4a of the engine head 4 has been described. It may be a fuel injection device for an internal combustion engine in which a deflection portion 8 is provided on the inner wall of the hole 1a.

実施の形態1に係る内燃機関の燃料噴射装置の断面図である。1 is a cross-sectional view of a fuel injection device for an internal combustion engine according to Embodiment 1. FIG. 図1のII−II線に沿った矢視断面図である。It is arrow sectional drawing along the II-II line | wire of FIG. 燃料噴射弁から噴射される燃料の噴射方向と偏向部とのなす角であって、反吸気弁側の角度により、燃料が偏向部に付着する関係を示した図である。FIG. 5 is a view showing a relationship in which fuel adheres to a deflection unit by an angle between an injection direction of fuel injected from a fuel injection valve and a deflection unit, and an angle on a counter-intake valve side. 実施の形態2に係る内燃機関の燃料噴射装置の断面図である。5 is a cross-sectional view of a fuel injection device for an internal combustion engine according to Embodiment 2. FIG. 図4のV−V線に沿った矢視断面図である。It is arrow sectional drawing along the VV line of FIG. 実施の形態3に係る内燃機関の燃料噴射装置の断面図である。6 is a cross-sectional view of a fuel injection device for an internal combustion engine according to Embodiment 3. FIG.

符号の説明Explanation of symbols

1 吸気管、1a 吸気孔、2 燃料、3 燃料噴射弁、4 エンジンヘッド、4a 連通孔、5 燃焼室、6 吸気弁、7 内壁、8 偏向部、9 被膜。   DESCRIPTION OF SYMBOLS 1 Intake pipe, 1a Intake hole, 2 Fuel, 3 Fuel injection valve, 4 Engine head, 4a Communication hole, 5 Combustion chamber, 6 Intake valve, 7 Inner wall, 8 Deflection part, 9 Coating

Claims (5)

吸気弁の上流側に設けられた吸気管に取り付けられ、前記吸気管内に燃料を噴射する燃料噴射弁と、
前記燃料噴射弁に対向して設けられ、前記燃料噴射弁から噴射された前記燃料を反射させて、前記燃料の噴射方向を前記吸気弁側に向かって偏向させる偏向部とを備えたことを特徴とする内燃機関の燃料噴射装置。
A fuel injection valve attached to an intake pipe provided upstream of the intake valve and injecting fuel into the intake pipe;
A deflecting portion provided opposite to the fuel injection valve and configured to reflect the fuel injected from the fuel injection valve and deflect the injection direction of the fuel toward the intake valve side. A fuel injection device for an internal combustion engine.
前記偏向部は、平面形状であることを特徴とする請求項1に記載の内燃機関の燃料噴射装置。   The fuel injection device for an internal combustion engine according to claim 1, wherein the deflecting portion has a planar shape. 前記燃料噴射弁から噴射される前記燃料の噴射方向と前記偏向部とのなす角であって、反吸気弁側の角度が、35°より大きく、55°より小さいことを特徴とする請求項2に記載の内燃機関の燃料噴射装置。   3. The angle formed between the direction of injection of the fuel injected from the fuel injection valve and the deflecting portion, and the angle on the side opposite to the intake valve is greater than 35 ° and smaller than 55 °. A fuel injection device for an internal combustion engine according to claim 1. 前記偏向部は、前記吸気管の径方向外側へ凹んだ球面形状であることを特徴とする請求項1に記載の内燃機関の燃料噴射装置。   2. The fuel injection device for an internal combustion engine according to claim 1, wherein the deflecting portion has a spherical shape that is recessed outward in the radial direction of the intake pipe. 前記偏向部の表面には、撥油性の被膜が設けられていることを特徴とする請求項1ないし請求項4の何れか1項に記載の内燃機関の燃料噴射装置。   The fuel injection device for an internal combustion engine according to any one of claims 1 to 4, wherein an oil-repellent coating is provided on a surface of the deflecting portion.
JP2007139415A 2007-05-25 2007-05-25 Fuel injection device for internal combustion engine Pending JP2008291783A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020122416A (en) * 2019-01-29 2020-08-13 ダイハツ工業株式会社 Internal combustion engine
JP7306832B2 (en) 2019-01-29 2023-07-11 ダイハツ工業株式会社 cylinder head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5886450U (en) * 1981-12-04 1983-06-11 日産自動車株式会社 internal combustion engine intake port
JPH0263072U (en) * 1988-11-01 1990-05-11
JPH03124959A (en) * 1989-10-09 1991-05-28 Nissan Motor Co Ltd Fuel feeder for internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5886450U (en) * 1981-12-04 1983-06-11 日産自動車株式会社 internal combustion engine intake port
JPH0263072U (en) * 1988-11-01 1990-05-11
JPH03124959A (en) * 1989-10-09 1991-05-28 Nissan Motor Co Ltd Fuel feeder for internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020122416A (en) * 2019-01-29 2020-08-13 ダイハツ工業株式会社 Internal combustion engine
JP7283850B2 (en) 2019-01-29 2023-05-30 ダイハツ工業株式会社 internal combustion engine
JP7306832B2 (en) 2019-01-29 2023-07-11 ダイハツ工業株式会社 cylinder head

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