JP2008133786A - Fuel injection device - Google Patents

Fuel injection device Download PDF

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JP2008133786A
JP2008133786A JP2006321330A JP2006321330A JP2008133786A JP 2008133786 A JP2008133786 A JP 2008133786A JP 2006321330 A JP2006321330 A JP 2006321330A JP 2006321330 A JP2006321330 A JP 2006321330A JP 2008133786 A JP2008133786 A JP 2008133786A
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fuel
heating
fuel injection
heating member
injection device
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JP4409564B2 (en
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Mikihiko Suzuki
幹彦 鈴木
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a compact and light weight fuel injection device with a simple structure. <P>SOLUTION: A pair of rotatable heating members 8 in a flap shape or a butterfly shape are provided in a fuel jet 7 injected from a fuel injection valve 1 when fuel is injected into an intake port 4a by the fuel injection valve 1 and a lower stream side opening of the heating member 8 is narrowed when promotion of atomization and vaporization at low-temperature start time or the like is required, so that the fuel jet 7 injected from the fuel injection valve 1 collides with the heating members 8. When the temperature of an intake valve 6 and the intake port part 4a is high after engine warm-up and the like and the promotion of atomization and vaporization of fuel is not required, the lower stream side opening of the heating member 8 is widened so that the fuel jet 7 from the fuel injection valve 1 hardly collides with the heating member 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、内燃機関の吸気ポート内に燃料を噴射する燃料噴射装置に関するものであり、特に噴射開口から燃料を燃料噴流の形で噴射する燃料噴射弁と、この燃料噴流を加熱するための手段を有した燃料噴射装置に関するものである。   The present invention relates to a fuel injection device for injecting fuel into an intake port of an internal combustion engine, and in particular, a fuel injection valve for injecting fuel in the form of a fuel jet from an injection opening, and means for heating the fuel jet The present invention relates to a fuel injection device having

燃料噴流の微粒化及び気化を促進させるために加熱部材を備えた従来装置としては、燃料噴射手段及び電気抵抗加熱手段の両方が選択的に運動可能なものや、あるいは燃料噴射手段または電気抵抗加熱手段のどちらか一方が選択的に運動可能なものが存在していた（特許文献１参照）。   As a conventional apparatus provided with a heating member for promoting atomization and vaporization of the fuel jet, one in which both the fuel injection means and the electric resistance heating means can selectively move, or the fuel injection means or the electric resistance heating is used. There was one in which either one of the means can selectively move (see Patent Document 1).

又スリーブ内にスライダが摺動可能に収納されるとともに、このスライダには加熱エレメントが結合されており、スライダが電磁力や圧縮空気負荷によって操作されることにより、加熱エレメントが出し入れされる燃料噴射装置があった（特許文献２参照）。   In addition, a slider is slidably accommodated in the sleeve, and a heating element is coupled to the slider, and a fuel injection in which the heating element is taken in and out when the slider is operated by electromagnetic force or compressed air load. There was a device (see Patent Document 2).

特開平６−１０１５８４号公報JP-A-6-101484 特開平８−２１０２２９号公報JP-A-8-210229

上記特許文献１における燃料噴射手段及び電気抵抗加熱手段の両方が選択的に運動可能なものでは、可動部が多く、各部を駆動するためのアクチュエータも多数必要となり、燃料噴射装置が大型化及び複雑化してしまい、高価なものになってしまうという問題点があった。   In the case where both the fuel injection means and the electric resistance heating means in Patent Document 1 are selectively movable, there are many movable parts and a large number of actuators for driving each part are required, and the fuel injection apparatus is increased in size and complexity. There is a problem that it becomes expensive and expensive.

さらに、燃料噴射手段を運動可能にして、取付け角度の変更を可能にしたものでは、燃料噴射手段の吸気通路への取付け部における耐久性及び気密性を確保することが困難であり、又燃料噴射手段が動くことにより、燃料通路部の耐久性及び燃料シール性を確保することが困難であるという問題点があった。   Further, if the fuel injection means can be moved and the attachment angle can be changed, it is difficult to ensure durability and airtightness in the attachment portion of the fuel injection means to the intake passage. Due to the movement of the means, there is a problem that it is difficult to ensure the durability and fuel sealing performance of the fuel passage portion.

更に電気抵抗加熱手段のみを選択的に運動可能にした場合においては、駆動部が大型化するとともに、電気抵抗加熱手段の動作範囲が大きくなってしまい、装置全体が大型化してしまうという問題点があった。   Furthermore, when only the electric resistance heating means can be selectively moved, there is a problem that the drive unit becomes larger and the operation range of the electric resistance heating means becomes larger, and the entire apparatus becomes larger. there were.

又上記特許文献２に示されたものにおいては、燃料噴射弁が固定され、取付け角度の変更ができないようになっているので、吸気通路の気密性や燃料シール性等を確保することはできるが、気筒毎に加熱エレメントが結合されているスライダと、このスライダを収納し、その内部でスライダが摺動するスリーブと、電磁石又は空気圧を利用してスライダを駆動するためのアクチュエータ等を設ける必要があり、装置が大型で高価なものになるという問題点があった。   Moreover, in the thing shown by the said patent document 2, since a fuel injection valve is fixed and the attachment angle cannot be changed, the airtightness of an intake passage, fuel seal property, etc. can be ensured. It is necessary to provide a slider to which a heating element is coupled for each cylinder, a sleeve in which the slider is housed and in which the slider slides, and an actuator for driving the slider using an electromagnet or air pressure. However, there is a problem that the apparatus becomes large and expensive.

この発明は上記のような課題を解決するためになされたものであり、構造が簡単であり、小型かつ軽量な燃料噴射装置を安価に提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a low-cost fuel injection device having a simple structure and a small size and light weight.

この発明の請求項１に係る燃料噴射装置は、内燃機関の吸気ポート内に燃料を噴射する燃料噴射弁を備えたものであって、燃料噴射弁から噴射される燃料噴流の途中に回転可能な一対の加熱部材を配置し、燃料の微粒化及び気化を促進することが必要な時には一対の加熱部材の下流側開口を狭めて、燃料噴流が加熱部材に衝突するようにするとともに、燃料の微粒化及び気化を促進することが不必要な時には一対の加熱部材の下流側開口を広げて、燃料噴流のほとんどが加熱部材に衝突しないようにしたものである。   A fuel injection device according to a first aspect of the present invention includes a fuel injection valve that injects fuel into an intake port of an internal combustion engine, and is rotatable in the middle of a fuel jet injected from the fuel injection valve. When it is necessary to arrange a pair of heating members and promote atomization and vaporization of the fuel, the downstream opening of the pair of heating members is narrowed so that the fuel jet collides with the heating member, and the fuel particles When it is unnecessary to promote vaporization and vaporization, the downstream openings of the pair of heating members are widened so that most of the fuel jet does not collide with the heating members.

この発明の請求項１に係る燃料装置によれば、内燃機関の吸気ポート内に燃料を噴射する燃料噴射弁を備えたものであって、燃料噴射弁から噴射される燃料噴流の途中に回転可能な一対の加熱部材を配置し、燃料の微粒化及び気化を促進することが必要な時には一対の加熱部材の下流側開口を狭めて、燃料噴流が加熱部材に衝突するようにするとともに、燃料の微粒化及び気化を促進することが不必要な時には一対の加熱部材の下流側開口を広げて、燃料噴流のほとんどが加熱部材に衝突しないようにしたので、構造が簡単であり、小型かつ軽量な燃料噴射装置を安価に提供することができる。   According to the fuel device of the first aspect of the present invention, the fuel device includes the fuel injection valve that injects fuel into the intake port of the internal combustion engine, and can rotate in the middle of the fuel jet injected from the fuel injection valve. When it is necessary to arrange a pair of heating members and promote atomization and vaporization of the fuel, the downstream openings of the pair of heating members are narrowed so that the fuel jet collides with the heating member, and the fuel When it is unnecessary to promote atomization and vaporization, the downstream opening of the pair of heating members is widened so that most of the fuel jet does not collide with the heating member, so the structure is simple, small and lightweight A fuel injection device can be provided at low cost.

実施の形態１．
以下この発明の一実施形態を図に基づいて説明する。図１はこの発明の実施の形態１による内燃機関に使用される燃料噴射装置を示す側面断面図であり、図において、燃料噴射弁１は、シール部材２を介してインテークマニホールド３に装着されており、シリンダーヘッド４にバルブシート５を介して組み付けられた吸気バルブ６に向かって燃料噴射弁１から吸気ポート４ａ内に燃料が噴射されることにより燃料噴流７が形成される。 Embodiment 1 FIG.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view showing a fuel injection device used in an internal combustion engine according to Embodiment 1 of the present invention. In the figure, a fuel injection valve 1 is mounted on an intake manifold 3 via a seal member 2. A fuel jet 7 is formed by injecting fuel into the intake port 4a from the fuel injection valve 1 toward the intake valve 6 assembled to the cylinder head 4 via the valve seat 5.

この燃料噴流７の途中に、回転可能な一対のフラップ形加熱部材８が配置されており、この加熱部材８は軸８ａを中心に回転可能な状態となっている。図２、図３は図１に示された燃料噴射装置をＡ方向から見た概略平面図であり、図２は加熱部材８の下流側を開いた状態を示す平面図、図３は加熱部材８の下流側を閉じた状態を示す平面図である。   A pair of rotatable flap-shaped heating members 8 are disposed in the middle of the fuel jet 7, and the heating members 8 are rotatable about a shaft 8a. 2 and 3 are schematic plan views of the fuel injection device shown in FIG. 1 as viewed from the direction A, FIG. 2 is a plan view showing a state where the downstream side of the heating member 8 is opened, and FIG. 3 is a heating member. It is a top view which shows the state which closed the downstream of 8. FIG.

又図４、図５は加熱部材８部を示す拡大平面図であり、図４は加熱部材８の下流側を開いた状態を示す拡大平面図、図５は加熱部材８の下流側を閉じた状態を示す拡大平面図である。   4 and 5 are enlarged plan views showing the heating member 8 part, FIG. 4 is an enlarged plan view showing a state where the downstream side of the heating member 8 is opened, and FIG. 5 is a view showing the downstream side of the heating member 8 closed. It is an enlarged plan view which shows a state.

低温状態におけるエンジンの始動時において、燃料の微粒化及び気化を促進することが必要な時、エンジン制御装置（図示なし）からの信号に基づき、アクチュエータ（図示なし）が案内部材９を図４に示す位置から図５に示す位置まで平行移動させる。   When it is necessary to promote atomization and vaporization of fuel when starting the engine in a low temperature state, an actuator (not shown) guides the guide member 9 in FIG. 4 based on a signal from an engine control device (not shown). The translation is performed from the position shown to the position shown in FIG.

これにより、案内部材９に設けられた円弧状の穴部９ａに沿って、加熱部材８に設けられた突起部８ｂがスライド動作する。これにより、図３，図５に示すように、一対のフラップ形加熱部材８の下流側開口が狭まり、燃料噴射弁１から噴射された燃料噴流７のほとんどは加熱部材８に衝突するようになる。   As a result, the protrusion 8b provided on the heating member 8 slides along the arcuate hole 9a provided on the guide member 9. As a result, as shown in FIGS. 3 and 5, the downstream openings of the pair of flap-type heating members 8 are narrowed, and most of the fuel jet 7 injected from the fuel injection valve 1 collides with the heating member 8. .

加熱部材８に衝突した燃料は、加熱されることにより微粒化及び気化が促進され、吸気通路３ａを介してエンジンのシリンダーへ吸入される空気と十分に混合されて適正に燃焼することになるので、排気ガス中に含まれる有害成分が少なくなり、更に燃料消費量も低減される。   The fuel that has collided with the heating member 8 is heated so that atomization and vaporization are promoted, and the fuel is sufficiently mixed with the air sucked into the engine cylinder through the intake passage 3a and properly burned. In addition, harmful components contained in the exhaust gas are reduced, and fuel consumption is also reduced.

エンジンが十分に暖まり、吸気バルブ６及び吸気ポート４ａの温度が高く、噴射燃料を加熱して微粒化及び気化を促進することが不要になった時は、エンジン制御装置（図示なし）からの信号に基づき、アクチュエータ（図示なし）が案内部材９を図４に示す位置まで平行移動させる。   A signal from an engine control device (not shown) when the engine is sufficiently warm, the temperature of the intake valve 6 and the intake port 4a is high, and it becomes unnecessary to heat the injected fuel to promote atomization and vaporization. Based on the above, an actuator (not shown) translates the guide member 9 to the position shown in FIG.

これにより案内部材９に設けられた円弧状の穴部９ａに沿って、加熱部材８に設けられた突起部８ｂがスライド動作し、図２，図４に示すように、一対のフラップ形加熱部材８の下流側開口が広がり、燃料噴射弁１から噴射された燃料噴流７のほとんどは加熱部材８に衝突しないようになる。   As a result, the protrusion 8b provided on the heating member 8 slides along the arcuate hole 9a provided on the guide member 9, and as shown in FIGS. 2 and 4, a pair of flap-type heating members 8 is widened so that most of the fuel jet 7 injected from the fuel injection valve 1 does not collide with the heating member 8.

従って加熱部材８を加熱させる必要がなくなるので、加熱部材８を昇温するための電力が不要となり、燃料消費量の低減に寄与する。   Accordingly, since it is not necessary to heat the heating member 8, electric power for heating the heating member 8 becomes unnecessary, which contributes to a reduction in fuel consumption.

上記構成においては、１つの気筒に対し２つの吸気バルブ６を有するエンジンについて説明したが、１つの気筒に対し１つまたは３つ以上の複数の吸気バルブ６を有するエンジンに応用することもできる。   In the above configuration, an engine having two intake valves 6 for one cylinder has been described. However, the present invention can also be applied to an engine having one or three or more intake valves 6 for one cylinder.

また、案内部材９に設けられた円弧状の穴部９ａの代わりに円弧状の溝を設けるようにしても良い。以上のように構成することにより、１つのアクチュエータを設置するだけで済ますことができ、更には可動部の動作範囲も小さくなるので、小型かつ軽量な燃料噴射装置を安価に提供することができるようになる。   Further, instead of the arcuate hole 9 a provided in the guide member 9, an arcuate groove may be provided. With the configuration as described above, only one actuator can be installed, and further, the operating range of the movable part is reduced, so that a small and lightweight fuel injection device can be provided at low cost. become.

実施の形態２．
図６，図７はこの発明の実施の形態２による燃料噴射装置を示す平面図であり、図６は加熱部材の下流側を開いた状態を示す平面図、図７は加熱部材の下流側を閉じた状態を示す平面図である。 Embodiment 2. FIG.
6 and 7 are plan views showing a fuel injection device according to Embodiment 2 of the present invention. FIG. 6 is a plan view showing a state where the downstream side of the heating member is opened. FIG. 7 is a plan view showing the downstream side of the heating member. It is a top view which shows the closed state.

上記実施の形態１においては、フラップ形加熱部材８を設けた場合について説明したが、本実施形態においては、蝶形加熱部材１１を設けたものである。ここでフラップ形加熱部材とは、図２〜図５に示されるように、軸８ａが加熱部材８の端部付近に設置されているものであり、これに対し蝶形加熱部材１１とは、図６，図７に示されるように、軸１１ａが加熱部材１１の中心付近に設置されているものである。   In the first embodiment, the case where the flap heating member 8 is provided has been described. However, in this embodiment, the butterfly heating member 11 is provided. Here, as shown in FIGS. 2 to 5, the flap-shaped heating member is one in which the shaft 8 a is installed near the end of the heating member 8, while the butterfly-shaped heating member 11 is As shown in FIGS. 6 and 7, the shaft 11 a is installed near the center of the heating member 11.

尚加熱部材自体の形状及び案内部材９による駆動方法は実施の形態１の場合と同様である。このような蝶形加熱部材１１を使用することにより、様々な燃料噴流７に対応することができ、例えば図７に示すように、燃料噴流７の方向に対しほぼ直角な方向に加熱部材１１を配置することもできるようになる。   The shape of the heating member itself and the driving method by the guide member 9 are the same as those in the first embodiment. By using such a butterfly heating member 11, it is possible to deal with various fuel jets 7. For example, as shown in FIG. 7, the heating member 11 is placed in a direction substantially perpendicular to the direction of the fuel jet 7. It can also be arranged.

実施の形態３．
図８はこの発明の実施の形態３による燃料噴射装置を示す平面図であり、図８は加熱部材の下流側を閉じた状態を示している。本実施形態においては、多気筒エンジンが採用されており、複数の吸気通路３ａが設けられている。 Embodiment 3 FIG.
FIG. 8 is a plan view showing a fuel injection device according to Embodiment 3 of the present invention, and FIG. 8 shows a state where the downstream side of the heating member is closed. In the present embodiment, a multi-cylinder engine is employed, and a plurality of intake passages 3a are provided.

円弧状の穴部２１ａが設けられた案内部材２１が平行に配置された複数の気筒にまたがるように一体に構成されており、エンジン制御装置（図示なし）からの信号に基づき、アクチュエータ（図示なし）がこの案内部材２１を平行移動させることにより、複数の気筒にそれぞれ設けられた加熱部材８を同時に動作させることができる。   The guide member 21 provided with the arc-shaped hole 21a is integrally configured to span a plurality of cylinders arranged in parallel, and based on a signal from an engine control device (not shown), an actuator (not shown) ) Can move the guide member 21 in parallel, thereby simultaneously operating the heating members 8 provided in the plurality of cylinders.

以上のように構成することにより、多気筒エンジンであっても、加熱部材駆動部の部品点数及び駆動アクチュエータの数が少なくて済み、小型かつ軽量な燃料噴射装置を安価に提供できる。   By configuring as described above, even in a multi-cylinder engine, the number of components of the heating member drive unit and the number of drive actuators are small, and a small and lightweight fuel injection device can be provided at low cost.

実施の形態４．
図９，図１０はこの発明の実施の形態４による加熱部材部を示す拡大平面図であり、図９は加熱部材の下流側を開いた状態を示す拡大平面図、図１０は加熱部材の下流側を閉じた状態を示す平面図である。 Embodiment 4 FIG.
9 and 10 are enlarged plan views showing a heating member portion according to Embodiment 4 of the present invention, FIG. 9 is an enlarged plan view showing a state where the downstream side of the heating member is opened, and FIG. 10 is a downstream view of the heating member. It is a top view which shows the state which closed the side.

本実施形態においては、加熱部材８を回転させるための部材３１として、Ｎｉ−Ｔｉ合金、Ｃｕ−Ｚｎ−Ａｌ合金またはこれらに準ずる形状記憶効果を有する形状記憶合金部材を採用したものであり、このような合金製部材の変形動作を利用して加熱部材８を回転させるものである。   In the present embodiment, as the member 31 for rotating the heating member 8, a Ni—Ti alloy, a Cu—Zn—Al alloy, or a shape memory alloy member having a shape memory effect equivalent to these is employed. The heating member 8 is rotated by utilizing the deformation operation of such an alloy member.

エンジン制御装置（図示なし）からの信号に基づき、形状記憶合金部材３１が、非加熱または加熱されることにより変形動作し、一対のフラップ形加熱部材８が回転する。図９は加熱状態を示しており、一対のフラップ形加熱部材８の下流側開口は広がっている。又図１０は非加熱状態を示しており、一対のフラップ形加熱部材８の下流側開口は狭まっている。   Based on a signal from an engine control device (not shown), the shape memory alloy member 31 is deformed by non-heating or being heated, and the pair of flap-type heating members 8 rotate. FIG. 9 shows a heating state, and the downstream openings of the pair of flap-type heating members 8 are widened. FIG. 10 shows a non-heated state, and the downstream openings of the pair of flap-type heating members 8 are narrowed.

以上のように構成することにより、燃料噴射装置の構造を更に簡素化することができるようになり、小型かつ軽量な燃料噴射装置を安価に提供することができるようになる。   With the configuration described above, the structure of the fuel injection device can be further simplified, and a small and lightweight fuel injection device can be provided at low cost.

実施の形態５．
図１１はこの発明の実施の形態５による燃料噴射装置の加熱部材を示す側面図である。
加熱部材４１を構成する加熱素子４１ｂは、たとえば折り畳まれた複数の電気的な加熱プレートから成っている。 Embodiment 5. FIG.
FIG. 11 is a side view showing a heating member of a fuel injection device according to Embodiment 5 of the present invention.
The heating element 41b constituting the heating member 41 is composed of, for example, a plurality of folded electric heating plates.

個々の加熱プレートは、たとえばＰＴＣ（ｐｏｓｉｔｉｖｅ ｔｅｍｐｅｒａｔｕｒｅ ｃｏｅｆｆｉｃｉｅｎｔ）抵抗素子から形成され、このＰＴＣ抵抗素子は通電された状態で、その正の抵抗係数に基づき、流れ通路内を流れる燃料に熱を引き渡す。燃料噴流７は加熱素子４１ｂの流れ通路を通流して、通流時にＰＴＣ抵抗素子によって加熱されるので、加熱部材４１から流出した後に燃料はほぼ蒸発した状態となる。   Each heating plate is formed of, for example, a PTC (positive temperature coefficient) resistance element. The PTC resistance element is energized and transfers heat to the fuel flowing in the flow passage based on the positive resistance coefficient. Since the fuel jet 7 flows through the flow passage of the heating element 41b and is heated by the PTC resistance element when flowing, the fuel is almost evaporated after flowing out of the heating member 41.

本実施形態においては、図１１に示すように、複数の加熱素子４１ｂが加熱部材４１に対して縦方向に配列され、加熱素子４１ｂの間を燃料噴流７が通過するようになっている。このように構成することにより、加熱部材４１の放熱面積、及び燃料が衝突することにより付着し更には燃料が気化することに寄与する面積が増え、燃料の気化効率が向上する。   In the present embodiment, as shown in FIG. 11, a plurality of heating elements 41b are arranged in the vertical direction with respect to the heating member 41, and the fuel jet 7 passes between the heating elements 41b. By comprising in this way, the thermal radiation area of the heating member 41 and the area which adheres by fuel colliding and contributes to vaporization of fuel increase, and the vaporization efficiency of fuel improves.

実施の形態６．
図１２はこの発明の実施の形態６による燃料噴射装置の加熱部材を示す側面図である。
加熱部材５１を構成する加熱素子５１ｂは、たとえば折り畳まれた複数の電気的な加熱プレートから成っている。 Embodiment 6 FIG.
FIG. 12 is a side view showing a heating member of a fuel injection device according to Embodiment 6 of the present invention.
The heating element 51b constituting the heating member 51 is composed of, for example, a plurality of folded electric heating plates.

個々の加熱プレートは、たとえばＰＴＣ抵抗素子から形成され、このＰＴＣ抵抗素子は通電された状態で、その正の抵抗係数に基づき、流れ通路内を流れる燃料に熱を引き渡す。燃料噴流７は加熱素子５１ｂの流れ通路を通流して、通流時にＰＴＣ抵抗素子によって加熱されるので、加熱部材５１から流出した後に燃料はほぼ蒸発した状態となる。   Each heating plate is formed of, for example, a PTC resistance element. When the PTC resistance element is energized, heat is transferred to the fuel flowing in the flow passage based on the positive resistance coefficient. Since the fuel jet 7 flows through the flow passage of the heating element 51b and is heated by the PTC resistance element during the flow, the fuel is almost evaporated after flowing out of the heating member 51.

本実施形態においては、図１２に示すように、複数の加熱素子５１ｂが加熱部材５１に対して横方向に配列され、加熱素子５１ｂの間を燃料噴流７が通過するようになっている。このように構成することにより、実施の形態５の場合と同様、加熱部材５１の放熱面積、及び燃料が衝突することにより付着し更には燃料が気化することに寄与する面積が増え、燃料の気化効率が向上する。   In the present embodiment, as shown in FIG. 12, a plurality of heating elements 51b are arranged in the lateral direction with respect to the heating member 51, and the fuel jet 7 passes between the heating elements 51b. By configuring in this way, as in the case of the fifth embodiment, the heat radiation area of the heating member 51 and the area that adheres due to the collision of the fuel and further contributes to the vaporization of the fuel increase, and the vaporization of the fuel. Efficiency is improved.

実施の形態７．
図１３はこの発明の実施の形態７による燃料噴射装置の加熱部材を示す側面図である。
加熱部材６１を構成する加熱素子６１ｂは、たとえば折り畳まれた複数の電気的な加熱プレートから成っている。 Embodiment 7 FIG.
13 is a side view showing a heating member of a fuel injection device according to Embodiment 7 of the present invention.
The heating element 61b constituting the heating member 61 is composed of a plurality of folded electric heating plates, for example.

個々の加熱プレートは、たとえばＰＴＣ抵抗素子から形成され、このＰＴＣ抵抗素子は通電された状態で、その正の抵抗係数に基づき、流れ通路内を流れる燃料に熱を引き渡す。燃料噴流７は加熱素子６１ｂの流れ通路を通流して、通流時にＰＴＣ抵抗素子によって加熱されるので、加熱部材６１から流出した後に燃料はほぼ蒸発した状態となる。   Each heating plate is formed of, for example, a PTC resistance element. When the PTC resistance element is energized, heat is transferred to the fuel flowing in the flow passage based on the positive resistance coefficient. Since the fuel jet 7 flows through the flow passage of the heating element 61b and is heated by the PTC resistance element during the flow, the fuel is almost evaporated after flowing out of the heating member 61.

本実施形態においては、図１３に示すように、複数の加熱素子６１ｂが加熱部材６１に対して縦方向及び横方向に配列され、即ち加熱素子６１ｂが加熱部材６１上に網目状に形成されている。   In the present embodiment, as shown in FIG. 13, the plurality of heating elements 61 b are arranged in the vertical direction and the horizontal direction with respect to the heating member 61, that is, the heating elements 61 b are formed on the heating member 61 in a mesh shape. Yes.

このように構成することにより、上記実施の形態５、６の場合よりも更に加熱部材６１の放熱面積、及び燃料が衝突することにより付着し更には燃料が気化することに寄与する面積が増え、燃料の気化効率が向上するとともに、網目状に形成されているため、加熱素子６１ｂの剛性、強度が向上する。   By comprising in this way, the heat dissipation area of the heating member 61 and the area which contributes to vaporization of the fuel further adhering due to the collision of the fuel increase more than in the case of the fifth and sixth embodiments, While the fuel vaporization efficiency is improved, the heating element 61b is improved in rigidity and strength because it is formed in a mesh shape.

実施の形態８．
図１４はこの発明の実施の形態８による加熱部材部を示す拡大平面断面図であり、加熱部材４１の下流側を開いた状態を示している。一対の加熱部材４１の下流側を広げ、燃料噴流７のほとんどが加熱部材４１に衝突しないようにした時、図１４に示すように、加熱部材４１に設けられたプレート状の加熱素子４１ｂが、吸気流７１と略平行になるように構成されている。 Embodiment 8 FIG.
FIG. 14 is an enlarged plan sectional view showing a heating member portion according to Embodiment 8 of the present invention, and shows a state where the downstream side of the heating member 41 is opened. When the downstream side of the pair of heating members 41 is expanded so that most of the fuel jet 7 does not collide with the heating member 41, a plate-like heating element 41b provided on the heating member 41, as shown in FIG. It is configured to be substantially parallel to the intake air flow 71.

以上のように構成することにより、吸気通路３ａ内に設けられた加熱部材４１による通気抵抗を小さく抑えることができ、エンジンの性能低下を抑えることができる。尚図１４においては、加熱部材４１について説明したが、加熱部材５１，６１についても同様に構成することができる。   By configuring as described above, the ventilation resistance due to the heating member 41 provided in the intake passage 3a can be suppressed to be small, and the engine performance can be prevented from being lowered. Although the heating member 41 has been described with reference to FIG. 14, the heating members 51 and 61 can be similarly configured.

この発明の実施の形態１による内燃機関に使用される燃料噴射装置を示す側面断面図である。It is side surface sectional drawing which shows the fuel-injection apparatus used for the internal combustion engine by Embodiment 1 of this invention. 実施の形態の加熱部材の下流側を開いた状態を示す平面図である。It is a top view which shows the state which opened the downstream of the heating member of embodiment. 実施の形態の加熱部材の下流側を閉じた状態を示す平面図である。It is a top view which shows the state which closed the downstream of the heating member of embodiment. 実施の形態の加熱部材の下流側を開いた状態を示す拡大平面図である。It is an enlarged plan view which shows the state which opened the downstream of the heating member of embodiment. 実施の形態の加熱部材の下流側を閉じた状態を示す拡大平面図である。It is an enlarged plan view which shows the state which closed the downstream of the heating member of embodiment. この発明の実施の形態２による燃料噴射装置を示す平面図である。It is a top view which shows the fuel-injection apparatus by Embodiment 2 of this invention. この発明の実施の形態２による燃料噴射装置を示す平面図である。It is a top view which shows the fuel-injection apparatus by Embodiment 2 of this invention. この発明の実施の形態３による燃料噴射装置を示す平面図である。It is a top view which shows the fuel-injection apparatus by Embodiment 3 of this invention. この発明の実施の形態４による加熱部材部を示す拡大平面図である。It is an enlarged plan view which shows the heating member part by Embodiment 4 of this invention. この発明の実施の形態４による加熱部材部を示す拡大平面図である。It is an enlarged plan view which shows the heating member part by Embodiment 4 of this invention. この発明の実施の形態５による燃料噴射装置の加熱部材を示す側面図である。It is a side view which shows the heating member of the fuel-injection apparatus by Embodiment 5 of this invention. この発明の実施の形態６による燃料噴射装置の加熱部材を示す側面図である。It is a side view which shows the heating member of the fuel-injection apparatus by Embodiment 6 of this invention. この発明の実施の形態７による燃料噴射装置の加熱部材を示す側面図である。It is a side view which shows the heating member of the fuel-injection apparatus by Embodiment 7 of this invention. この発明の実施の形態８による加熱部材部を示す拡大平面断面図である。It is an expanded plane sectional view which shows the heating member part by Embodiment 8 of this invention.

符号の説明Explanation of symbols

１ 燃料噴射弁、４ａ 吸気ポート、８，４１，５１，６１ 加熱部材、
８ｂ 突起部、９ 案内部材、９ａ 穴部、３１ 形状記憶合金部材、
４１ｂ，５１ｂ，６１ｂ 加熱素子、７１ 吸気流。 1 Fuel injection valve, 4a Intake port, 8, 41, 51, 61 Heating member,
8b Projection part, 9 Guide member, 9a Hole part, 31 Shape memory alloy member,
41b, 51b, 61b Heating element, 71 Intake flow.

Claims (7)

内燃機関の吸気ポート内に燃料を噴射する燃料噴射弁を備えた燃料噴射装置において、上記燃料噴射弁から噴射される燃料噴流の途中に回転可能な一対の加熱部材を配置し、燃料の微粒化及び気化を促進することが必要な時には上記一対の加熱部材の下流側開口を狭めて、上記燃料噴流が上記加熱部材に衝突するようにするとともに、燃料の微粒化及び気化を促進することが不必要な時には上記一対の加熱部材の下流側開口を広げて、上記燃料噴流のほとんどが上記加熱部材に衝突しないようにしたことを特徴とする燃料噴射装置。 In a fuel injection device having a fuel injection valve for injecting fuel into an intake port of an internal combustion engine, a pair of rotatable heating members are arranged in the middle of the fuel jet injected from the fuel injection valve to atomize the fuel When it is necessary to promote vaporization, the downstream openings of the pair of heating members are narrowed so that the fuel jet collides with the heating member, and it is not possible to promote atomization and vaporization of the fuel. A fuel injection device characterized in that when necessary, the downstream openings of the pair of heating members are widened so that most of the fuel jet does not collide with the heating members. 円弧状の穴部が設けられた案内部材を設置するとともに、上記穴部に沿ってスライド移動する突起部を上記加熱部材に設け、上記案内部材を平行移動させることにより、上記加熱部材を回転させるようにしたことを特徴とする請求項１記載の燃料噴射装置。 A guide member provided with an arcuate hole is installed, a protrusion that slides along the hole is provided on the heating member, and the heating member is rotated by translating the guide member. The fuel injection device according to claim 1, which is configured as described above. 上記案内部材を平行に配置された複数の気筒にまたがるように一体に構成されたことを特徴とする請求項２記載の燃料噴射装置。 3. The fuel injection device according to claim 2, wherein the guide member is integrally formed so as to extend over a plurality of cylinders arranged in parallel. 形状記憶効果を有する形状記憶合金部材の変形動作を利用して上記加熱部材を回転させるようにしたことを特徴とする請求項１記載の燃料噴射装置。 2. The fuel injection device according to claim 1, wherein the heating member is rotated by utilizing a deformation operation of a shape memory alloy member having a shape memory effect. 複数の加熱素子が加熱部材に対して縦方向あるいは横方向に配列されていることを特徴とする請求項１から請求項４のいずれか１項に記載の燃料噴射装置。 The fuel injection device according to any one of claims 1 to 4, wherein the plurality of heating elements are arranged in a vertical direction or a horizontal direction with respect to the heating member. 複数の加熱素子が加熱部材に対して網目状に形成されていることを特徴とする請求項１から請求項４のいずれか１項に記載の燃料噴射装置。 The fuel injection device according to any one of claims 1 to 4, wherein the plurality of heating elements are formed in a mesh shape with respect to the heating member. 上記加熱部材の下流側開口を広げて、上記燃料噴流のほとんどが加熱部材に衝突しないようにした時、上記加熱部材に設けられた加熱素子が吸気流と略平行になるように構成されたことを特徴とする請求項１から請求項６のいずれか１項に記載の燃料噴射装置。 When the downstream opening of the heating member is widened so that most of the fuel jet does not collide with the heating member, the heating element provided on the heating member is configured to be substantially parallel to the intake air flow. The fuel injection device according to any one of claims 1 to 6, wherein:
JP2006321330A 2006-11-29 2006-11-29 Fuel injection device Expired - Fee Related JP4409564B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013083995A1 (en) * 2011-12-06 2013-06-13 Ip Consortium Limited Engine intake apparatus and method
KR101511836B1 (en) 2013-02-26 2015-04-14 조원대 Air-pollution Reducing Device of Engine
CN114233494A (en) * 2021-09-29 2022-03-25 太原理工大学 Cold starting device and method for methanol engine
JP2023049996A (en) * 2021-09-29 2023-04-10 本田技研工業株式会社 internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013083995A1 (en) * 2011-12-06 2013-06-13 Ip Consortium Limited Engine intake apparatus and method
US20140345568A1 (en) * 2011-12-06 2014-11-27 Ip Consortium Limited Engine intake apparatus and method
US11125191B2 (en) 2011-12-06 2021-09-21 Oval Engine Ltd Engine intake apparatus and method
KR101511836B1 (en) 2013-02-26 2015-04-14 조원대 Air-pollution Reducing Device of Engine
CN114233494A (en) * 2021-09-29 2022-03-25 太原理工大学 Cold starting device and method for methanol engine
JP2023049996A (en) * 2021-09-29 2023-04-10 本田技研工業株式会社 internal combustion engine

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