JP6213360B2 - Injector for internal combustion engine - Google Patents

Injector for internal combustion engine Download PDF

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JP6213360B2
JP6213360B2 JP2014084700A JP2014084700A JP6213360B2 JP 6213360 B2 JP6213360 B2 JP 6213360B2 JP 2014084700 A JP2014084700 A JP 2014084700A JP 2014084700 A JP2014084700 A JP 2014084700A JP 6213360 B2 JP6213360 B2 JP 6213360B2
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valve
communication
nozzle
injection
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JP2015203403A (en
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真也 佐野
真也 佐野
石塚　康治
康治 石塚
鈴木　雅幸
雅幸 鈴木
敦司 宇都宮
敦司 宇都宮
一史 芹澤
一史 芹澤
文裕 藤掛
文裕 藤掛
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Denso Corp
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Description

本発明は、内燃機関の燃焼室に燃料を噴射する内燃機関用インジェクタに関するものである。   The present invention relates to an injector for an internal combustion engine that injects fuel into a combustion chamber of the internal combustion engine.

従来、この種の内燃機関用インジェクタとして、例えば特許文献１に記載されたものがある。この特許文献１に記載された内燃機関用インジェクタは、有底筒状のノズルボデーの底部に複数の噴孔を設け、ノズルボデー内に往復動自在に配置された針弁をノズルボデーのシート部と接離させることにより噴孔を開閉するようになっている。   Conventionally, as this type of injector for an internal combustion engine, for example, there is one described in Patent Document 1. The injector for an internal combustion engine described in Patent Document 1 is provided with a plurality of injection holes at the bottom of a bottomed cylindrical nozzle body, and a needle valve disposed in a reciprocating manner in the nozzle body is brought into contact with and separated from the seat portion of the nozzle body. By doing so, the nozzle hole is opened and closed.

特開２０１３−１６０１９４号公報JP 2013-160194 A

しかしながら、従来の内燃機関用インジェクタにおいては、ノズルボデーのシート部の下流側にて全噴孔が連通し、針弁のノズルボデーのシート部との接離により全噴孔が同時に開閉されるため、各噴孔の噴射期間（時間軸）を独立で制御することは不可能であり、また、異なる噴射角度（噴孔配置）を持った噴孔の各々から独立に燃料を噴射させることも不可能である。   However, in the conventional injector for an internal combustion engine, all the injection holes communicate with the downstream side of the seat part of the nozzle body, and all the injection holes are simultaneously opened and closed by contact with and separation from the seat part of the nozzle body of the needle valve. It is impossible to independently control the injection period (time axis) of the nozzle holes, and it is also impossible to inject fuel independently from each of the nozzle holes having different injection angles (arrangement of nozzle holes). is there.

本発明は上記点に鑑みて、仕様の異なる噴孔からの燃料噴射を独立して制御出来るようにすることを目的とする。   In view of the above points, an object of the present invention is to enable independent control of fuel injection from nozzle holes having different specifications.

上記目的を達成するため、請求項１に記載の発明では、内燃機関用インジェクタは、
高圧燃料が供給される高圧燃料供給空間（１１）を有する有底筒状のノズルボデー（１）と、
ノズルボデーの底部に形成され、内燃機関の燃焼室に高圧燃料を噴出させる仕様の異なる第１噴孔（１２）および第２噴孔（１３）と、
高圧燃料供給空間と第１噴孔および第２噴孔とを連通させる連通路（３１、３２、４１）を有し、回転することにより高圧燃料供給空間と第１噴孔および第２噴孔との連通状態を切り替える連通切替手段（３、４）とを備える。
さらに、連通切替手段が有する連通路は、
第１噴孔に連通可能な複数のバルブ第１連通孔と、第２噴孔に連通可能な複数のバルブ第２連通孔を有しており、
複数の前記バルブ第１連通孔および複数の前記バルブ第２連通孔が閉塞される第１の状態と、
複数の前記バルブ第１連通孔のうち一方の前記バルブ第１連通孔と前記第１噴孔とが連通し、他方の前記バルブ第１連通孔および複数の前記バルブ第２連通孔が閉塞される第２の状態と、
複数の前記バルブ第２連通孔のうち一方の前記バルブ第２連通孔と前記第２噴孔とが連通し、他方の前記バルブ第２連通孔および複数の前記バルブ第１連通孔が閉塞される第３の状態と、
他方の前記バルブ第１連通孔と前記第１噴孔とが連通し、且つ、他方の前記バルブ第２連通孔と前記第２噴孔とが連通し、一方の前記バルブ第１連通孔および一方の前記バルブ第２連通孔が閉塞される第４の状態と、を含む少なくとも４つの状態が切替可能なように配置されていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, an injector for an internal combustion engine includes:
A bottomed cylindrical nozzle body (1) having a high-pressure fuel supply space (11) to which high-pressure fuel is supplied;
A first injection hole (12) and a second injection hole (13) which are formed at the bottom of the nozzle body and have different specifications for injecting high-pressure fuel into the combustion chamber of the internal combustion engine;
It has a communication passage for communicating (31, 32) and a high-pressure fuel supply space and the first nozzle hole and second nozzle hole, the high-pressure fuel supply space by rotation and the first nozzle hole and second nozzle hole the connection switching means (3, 4) to switch the communication with the Ru with the.
Furthermore, the communication path of the communication switching means is
A plurality of valve first communication holes capable of communicating with the first nozzle holes, and a plurality of valve second communication holes capable of communicating with the second nozzle holes,
A first state in which the plurality of valve first communication holes and the plurality of valve second communication holes are closed;
Among the plurality of first valve communication holes, one of the first valve communication holes and the first injection hole communicate with each other, and the other first valve communication hole and the plurality of second valve communication holes are closed. A second state;
Of the plurality of second valve communication holes, one of the second valve communication holes and the second injection hole communicate with each other, and the other second valve communication hole and the plurality of first valve communication holes are closed. A third state;
The other valve first communication hole and the first injection hole communicate with each other, and the other valve second communication hole and the second injection hole communicate with each other. It is arranged so that at least four states including the fourth state in which the valve second communication hole is closed can be switched.

これによると、回転する連通切替手段により、仕様の異なる噴孔からの燃料噴射を独立して制御することができる。   According to this, the fuel injection from the nozzle holes with different specifications can be controlled independently by the rotating communication switching means.

なお、この欄および特許請求の範囲で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

本発明の一実施形態に係る内燃機関用インジェクタにおける無噴射時の正面断面図である。It is a front sectional view at the time of no injection in the injector for internal-combustion engines concerning one embodiment of the present invention. 一実施形態に係る内燃機関用インジェクタの下面図である。It is a bottom view of the injector for internal-combustion engines concerning one embodiment. 一実施形態に係る内燃機関用インジェクタにおけるシート盤単体の平面図である。It is a top view of the sheet board simple substance in the injector for internal-combustion engines concerning one embodiment. 一実施形態に係る内燃機関用インジェクタにおける回転バルブ単体のＩＶ−ＩＶ断面図である。It is IV-IV sectional drawing of the rotary valve single-piece | unit in the injector for internal combustion engines which concerns on one Embodiment. 一実施形態に係る内燃機関用インジェクタにおける無噴射時のシート盤と回転バルブの相対位置を示す図である。It is a figure which shows the relative position of the seat board at the time of the non-injection in the injector for internal combustion engines which concerns on one Embodiment, and a rotary valve. 一実施形態に係る内燃機関用インジェクタにおける第１噴孔噴射時の正面断面図である。It is front sectional drawing at the time of the 1st injection hole injection in the injector for internal combustion engines which concerns on one Embodiment. 一実施形態に係る内燃機関用インジェクタにおける第１噴孔噴射時のシート盤と回転バルブの相対位置を示す図である。It is a figure which shows the relative position of the seat board at the time of the 1st injection hole injection in the injector for internal combustion engines which concerns on one Embodiment. 一実施形態に係る内燃機関用インジェクタにおける第２噴孔噴射時の正面断面図である。It is front sectional drawing at the time of the 2nd injection hole injection in the injector for internal combustion engines which concerns on one Embodiment. 一実施形態に係る内燃機関用インジェクタにおける第２噴孔噴射時のシート盤と回転バルブの相対位置を示す図である。It is a figure which shows the relative position of the seat board at the time of the 2nd injection hole injection in the injector for internal combustion engines which concerns on one Embodiment. 一実施形態に係る内燃機関用インジェクタにおける全噴孔噴射時の正面断面図である。It is front sectional drawing at the time of all the injection holes injection in the injector for internal combustion engines which concerns on one Embodiment. 一実施形態に係る内燃機関用インジェクタにおける全噴孔噴射時のシート盤と回転バルブの相対位置を示す図である。It is a figure which shows the relative position of the seat disk at the time of all the injection holes injection in the injector for internal combustion engines which concerns on one Embodiment.

本発明の一実施形態について説明する。   An embodiment of the present invention will be described.

図１、図２に示すように、インジェクタは、コモンレール（図示せず）から高圧燃料が供給される高圧燃料供給空間１１を有する有底筒状のノズルボデー１を備えている。   As shown in FIGS. 1 and 2, the injector includes a bottomed cylindrical nozzle body 1 having a high-pressure fuel supply space 11 to which high-pressure fuel is supplied from a common rail (not shown).

このノズルボデー１の底部には、図示しない内燃機関（より詳細には、圧縮着火式内燃機関）の燃焼室に高圧燃料を噴出させる仕様の異なる複数種類の噴孔１２、１３が形成されている。   A plurality of types of injection holes 12 and 13 having different specifications for injecting high-pressure fuel into a combustion chamber of an internal combustion engine (not shown) (more specifically, a compression ignition internal combustion engine) are formed at the bottom of the nozzle body 1.

具体的には、第１噴孔１２の径が第２噴孔１３の径よりも小さく設定されている。また、ノズルボデー１の軸線Ａに対する第１噴孔１２の角度θ１は、ノズルボデー軸線Ａに対する第２噴孔１３２の角度θ２よりも小さく設定されている。   Specifically, the diameter of the first nozzle hole 12 is set smaller than the diameter of the second nozzle hole 13. The angle θ1 of the first nozzle hole 12 with respect to the axis A of the nozzle body 1 is set smaller than the angle θ2 of the second nozzle hole 132 with respect to the nozzle body axis A.

第１噴孔１２は、ノズルボデー１の周方向に沿って等間隔に６個設けられている。また、第２噴孔１３も、ノズルボデー１の周方向に沿って等間隔に６個設けられている。   Six first nozzle holes 12 are provided at equal intervals along the circumferential direction of the nozzle body 1. Six second nozzle holes 13 are also provided at equal intervals along the circumferential direction of the nozzle body 1.

そして、第１噴孔１２における下流側開口部（すなわち、燃焼室側の端部）１２１の位置と、第２噴孔１３における下流側開口部１３１の位置は、ノズルボデー１の径方向にずれている。   The position of the downstream opening 121 (that is, the end on the combustion chamber side) 121 in the first injection hole 12 and the position of the downstream opening 131 in the second injection hole 13 are shifted in the radial direction of the nozzle body 1. Yes.

より詳細には、相対的に噴孔径および角度θ１が小さい第１噴孔１２の下流側開口部１２１の位置は、相対的に噴孔径および角度θ２が大きい第２噴孔１３の下流側開口部１３１の位置よりも、ノズルボデー１の径方向内側である。   More specifically, the position of the downstream opening 121 of the first nozzle hole 12 having a relatively small nozzle hole diameter and angle θ1 is the downstream opening of the second nozzle hole 13 having a relatively large nozzle hole diameter and angle θ2. It is on the radially inner side of the nozzle body 1 from the position 131.

図１、図３に示すように、高圧燃料供給空間１１内には、下流側端部にシート盤２が配置されている。このシート盤２には、第１噴孔１２と常時連通するシート第１連通孔２１、および、第２噴孔１３と常時連通するシート第２連通孔２２が設けられている。   As shown in FIGS. 1 and 3, in the high-pressure fuel supply space 11, the seat board 2 is disposed at the downstream end. The sheet board 2 is provided with a sheet first communication hole 21 that always communicates with the first injection hole 12 and a sheet second communication hole 22 that always communicates with the second injection hole 13.

シート第１連通孔２１は、ノズルボデー１の周方向に沿って等間隔に６個配置されている。また、シート第２連通孔２２は、シート第１連通孔２１よりもノズルボデー１の径方向外側に位置し、ノズルボデー１の周方向に沿って等間隔に６個配置されている。   Six sheet first communication holes 21 are arranged at equal intervals along the circumferential direction of the nozzle body 1. In addition, the sheet second communication holes 22 are located on the radially outer side of the nozzle body 1 with respect to the sheet first communication holes 21, and six are arranged at equal intervals along the circumferential direction of the nozzle body 1.

図１、図４に示すように、高圧燃料供給空間１１内には、シート盤２よりも上流側に、ノズルボデー１に対して回転自在な回転バルブ３、および回転バルブ３を駆動するアクチュエータ４が配置されている。回転バルブ３およびアクチュエータ４は、本発明の連通切替手段を構成している。   As shown in FIGS. 1 and 4, a rotary valve 3 that is rotatable with respect to the nozzle body 1 and an actuator 4 that drives the rotary valve 3 are disposed upstream of the seat board 2 in the high-pressure fuel supply space 11. Has been placed. The rotary valve 3 and the actuator 4 constitute the communication switching means of the present invention.

回転バルブ３には、シート第１連通孔２１と選択的に連通可能な連通路としてのバルブ第１連通孔３１、および、シート第２連通孔２２と選択的に連通可能な連通路としてのバルブ第２連通孔３２が設けられている。   The rotary valve 3 includes a valve first communication hole 31 as a communication path that can selectively communicate with the seat first communication hole 21 and a valve as a communication path that can selectively communicate with the seat second communication hole 22. A second communication hole 32 is provided.

バルブ第１連通孔３１は、ノズルボデー１の周方向に沿って１２個配置されている。また、シート第２連通孔２２は、シート第１連通孔２１よりもノズルボデー１の径方向外側に位置し、ノズルボデー１の周方向に沿って１２個配置されている。   Twelve valve first communication holes 31 are arranged along the circumferential direction of the nozzle body 1. Further, twelve sheet second communication holes 22 are located on the radially outer side of the nozzle body 1 with respect to the sheet first communication hole 21, and twelve are arranged along the circumferential direction of the nozzle body 1.

アクチュエータ４は、例えば電動機にて構成され、回転バルブ３を回転駆動する。また、アクチュエータ４は、回転バルブ３よりも上流側に配置されており、コモンレールから供給された高圧燃料をバルブ第１連通孔３１およびバルブ第２連通孔３２側に流通させる連通路としてのアクチュエータ連通孔４１が設けられている。   The actuator 4 is constituted by an electric motor, for example, and drives the rotary valve 3 to rotate. The actuator 4 is disposed upstream of the rotary valve 3 and communicates with the actuator as a communication path through which the high-pressure fuel supplied from the common rail flows to the valve first communication hole 31 and the valve second communication hole 32 side. A hole 41 is provided.

次に、作動を説明する。なお、図５、図７、図９、図１１では、シート第１連通孔２１およびシート第２連通孔２２と、バルブ第１連通孔３１およびバルブ第２連通孔３２とを、明瞭に区別するために、シート第１連通孔２１およびシート第２連通孔２２を破線で示し、バルブ第１連通孔３１およびバルブ第２連通孔３２を実線で示している。   Next, the operation will be described. 5, 7, 9, and 11, the seat first communication hole 21 and the seat second communication hole 22 are clearly distinguished from the valve first communication hole 31 and the valve second communication hole 32. Therefore, the seat first communication hole 21 and the seat second communication hole 22 are indicated by broken lines, and the valve first communication hole 31 and the valve second communication hole 32 are indicated by solid lines.

図１、図５に示す状態では、シート第１連通孔２１とバルブ第１連通孔３１は連通しておらず、また、シート第２連通孔２２とバルブ第２連通孔３２も連通していない。すなわち、図１、図５は無噴射状態である。   In the state shown in FIGS. 1 and 5, the seat first communication hole 21 and the valve first communication hole 31 are not in communication, and the seat second communication hole 22 and the valve second communication hole 32 are not in communication. . That is, FIGS. 1 and 5 show the non-injection state.

この無噴射状態からアクチュエータ４にて回転バルブ３を所定角度回転駆動して、図６、図７に示す状態に移行させると、シート第２連通孔２２とバルブ第２連通孔３２は非連通状態のままで、シート第１連通孔２１とバルブ第１連通孔３１は連通状態に変化する。   When the rotary valve 3 is rotationally driven by a predetermined angle by the actuator 4 from this non-injection state to shift to the state shown in FIGS. 6 and 7, the second seat communication hole 22 and the second valve communication hole 32 are not in communication. As it is, the seat first communication hole 21 and the valve first communication hole 31 are changed to the communication state.

したがって、この状態では、コモンレールから供給された高圧燃料が、アクチュエータ連通孔４１、バルブ第１連通孔３１、およびシート第１連通孔２１を介して、第１噴孔１２に供給され、第１噴孔１２から燃焼室に高圧燃料が噴射される。   Therefore, in this state, the high-pressure fuel supplied from the common rail is supplied to the first injection hole 12 via the actuator communication hole 41, the valve first communication hole 31, and the seat first communication hole 21, and the first injection fuel is supplied. High pressure fuel is injected from the holes 12 into the combustion chamber.

そして、第１噴孔１２は角度θ１が小さいため、燃料は燃焼室の中央部付近に噴射され、燃焼室の中央部付近で燃焼が開始される。   Since the first injection hole 12 has a small angle θ1, the fuel is injected near the center of the combustion chamber, and combustion is started near the center of the combustion chamber.

この第１噴孔１２から燃料を噴射している状態から回転バルブ３を所定角度さらに回転駆動して、図８、図９に示す状態に移行させると、シート第１連通孔２１とバルブ第１連通孔３１は非連通状態に変化し、シート第２連通孔２２とバルブ第２連通孔３２は連通状態に変化する。   When the rotary valve 3 is further rotationally driven by a predetermined angle from the state in which fuel is injected from the first injection hole 12 to shift to the state shown in FIGS. 8 and 9, the seat first communication hole 21 and the valve first The communication hole 31 changes to a non-communication state, and the seat second communication hole 22 and the valve second communication hole 32 change to a communication state.

したがって、この状態では、コモンレールから供給された高圧燃料が、アクチュエータ連通孔４１、バルブ第２連通孔３２、およびシート第２連通孔２２を介して、第２噴孔１３に供給され、第２噴孔１３から燃焼室に高圧燃料が噴射される。   Therefore, in this state, the high-pressure fuel supplied from the common rail is supplied to the second injection hole 13 through the actuator communication hole 41, the valve second communication hole 32, and the seat second communication hole 22, and the second injection High pressure fuel is injected from the holes 13 into the combustion chamber.

そして、第２噴孔１３は角度θ２が大きいため、燃料は燃焼室における外周側部位に噴射され、燃焼室における外周側に向かって燃焼が拡がる。   Since the second injection hole 13 has a large angle θ2, the fuel is injected to the outer peripheral side portion in the combustion chamber, and the combustion spreads toward the outer peripheral side in the combustion chamber.

この第２噴孔１３から燃料を噴射している状態から回転バルブ３を所定角度さらに回転駆動して、図１０、図１１に示す状態に移行させると、シート第２連通孔２２とバルブ第２連通孔３２は連通状態のままで、シート第１連通孔２１とバルブ第１連通孔３１も連通状態に変化する。したがって、この状態では、第１噴孔１２および第２噴孔１３から燃焼室に高圧燃料が噴射され、燃焼室のほぼ全域で燃焼する。   When the rotary valve 3 is further rotationally driven by a predetermined angle from the state in which the fuel is injected from the second injection hole 13 to shift to the state shown in FIGS. 10 and 11, the seat second communication hole 22 and the valve second The first communication hole 21 and the first valve communication hole 31 change to the communication state while the communication hole 32 remains in the communication state. Therefore, in this state, high-pressure fuel is injected from the first nozzle hole 12 and the second nozzle hole 13 into the combustion chamber, and burns in almost the entire area of the combustion chamber.

この第１噴孔１２および第２噴孔１３から燃料を噴射している状態から回転バルブ３を所定角度さらに回転駆動すると、図１、図５に示す無噴射状態に移行し、噴射が終了する。   When the rotary valve 3 is further rotationally driven by a predetermined angle from the state in which fuel is injected from the first injection hole 12 and the second injection hole 13, the state is changed to the non-injection state shown in FIGS. .

本実施形態によると、仕様の異なる第１噴孔１２および第２噴孔１３からの燃料噴射を独立して制御することができる。   According to this embodiment, fuel injection from the first nozzle hole 12 and the second nozzle hole 13 having different specifications can be controlled independently.

また、第１噴孔１２から燃料を噴射する状態、第２噴孔１３から燃料を噴射する状態、第１噴孔１２および第２噴孔１３から燃料を噴射する状態に、順次移行させることにより、燃焼室の中央部付近から外周側に向かって燃焼が拡がり、燃焼室内空気の利用率が高くなり、燃焼効率が高くなる。   Further, by sequentially shifting to a state in which fuel is injected from the first injection hole 12, a state in which fuel is injected from the second injection hole 13, and a state in which fuel is injected from the first injection hole 12 and the second injection hole 13. Combustion spreads from the vicinity of the central portion of the combustion chamber toward the outer peripheral side, the utilization rate of the air in the combustion chamber increases, and the combustion efficiency increases.

なお、上記実施形態においては、第１噴孔１２から燃料を噴射する状態、第２噴孔１３から燃料を噴射する状態、第１噴孔１２および第２噴孔１３から燃料を噴射する状態に、順次移行させるようにしたが、例えば負荷に応じて噴射状態を選択してもよい。   In the above embodiment, the fuel is injected from the first injection hole 12, the fuel is injected from the second injection hole 13, and the fuel is injected from the first injection hole 12 and the second injection hole 13. However, the injection state may be selected according to the load, for example.

例えば、低負荷時には第１噴孔１２から燃料を噴射する状態のみを選択し、中負荷時には第２噴孔１３から燃料を噴射する状態のみを選択し、高負荷時には第１噴孔１２および第２噴孔１３から燃料を噴射する状態のみを選択するようにしてもよい。   For example, only a state in which fuel is injected from the first injection hole 12 is selected at a low load, only a state in which fuel is injected from the second injection hole 13 is selected at an intermediate load, and the first injection hole 12 and the first injection state are selected at a high load. Only the state in which fuel is injected from the two nozzle holes 13 may be selected.

（他の実施形態）
上記実施形態では、本発明を圧縮着火式内燃機関の燃料噴射弁に適用したが、本発明は直噴ガソリン内燃機関の燃料噴射弁にも適用することができる。 (Other embodiments)
In the above embodiment, the present invention is applied to a fuel injection valve of a compression ignition type internal combustion engine. However, the present invention can also be applied to a fuel injection valve of a direct injection gasoline internal combustion engine.

なお、本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。   In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably.

また、上記実施形態において、実施形態を構成する要素は、特に必須であると明示した場合および原理的に明らかに必須であると考えられる場合等を除き、必ずしも必須のものではないことは言うまでもない。   Further, in the above-described embodiment, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered to be essential in principle. .

また、上記実施形態において、実施形態の構成要素の個数、数値、量、範囲等の数値が言及されている場合、特に必須であると明示した場合および原理的に明らかに特定の数に限定される場合等を除き、その特定の数に限定されるものではない。   Further, in the above embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to a specific number except for cases.

また、上記実施形態において、構成要素等の形状、位置関係等に言及するときは、特に明示した場合および原理的に特定の形状、位置関係等に限定される場合等を除き、その形状、位置関係等に限定されるものではない。   In the above embodiment, when referring to the shape, positional relationship, etc. of components, the shape, position, etc., unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to relationships.

１ ノズルボデー
３ 回転バルブ（連通切替手段）
４ アクチュエータ（連通切替手段）
１１ 高圧燃料供給空間
１２ 第１噴孔
１３ 第２噴孔
３１ バルブ第１連通孔（連通路）
３２ バルブ第２連通孔（連通路）
４１ アクチュエータ連通孔（連通路） 1 Nozzle body 3 Rotary valve (communication switching means)
4 Actuator (communication switching means)
11 High-pressure fuel supply space 12 First injection hole 13 Second injection hole 31 Valve first communication hole (communication path)
32 Valve 2nd communication hole (communication path)
41 Actuator communication hole (communication path)

Claims (6)

高圧燃料が供給される高圧燃料供給空間（１１）を有する有底筒状のノズルボデー（１）と、
前記ノズルボデーの底部に形成され、内燃機関の燃焼室に高圧燃料を噴出させる仕様の異なる第１噴孔（１２）および第２噴孔（１３）と、
前記高圧燃料供給空間と前記第１噴孔および前記第２噴孔とを連通させる連通路（３１、３２、４１）を有し、回転することにより前記高圧燃料供給空間と前記第１噴孔および前記第２噴孔との連通状態を切り替える連通切替手段（３、４）とを備え、
前記連通切替手段が有する前記連通路は、
前記第１噴孔に連通可能な複数のバルブ第１連通孔と、前記第２噴孔に連通可能な複数のバルブ第２連通孔を有しており、
複数の前記バルブ第１連通孔および複数の前記バルブ第２連通孔が閉塞される第１の状態と、
複数の前記バルブ第１連通孔のうち一方の前記バルブ第１連通孔と前記第１噴孔とが連通し、他方の前記バルブ第１連通孔および複数の前記バルブ第２連通孔が閉塞される第２の状態と、
複数の前記バルブ第２連通孔のうち一方の前記バルブ第２連通孔と前記第２噴孔とが連通し、他方の前記バルブ第２連通孔および複数の前記バルブ第１連通孔が閉塞される第３の状態と、
他方の前記バルブ第１連通孔と前記第１噴孔とが連通し、且つ、他方の前記バルブ第２連通孔と前記第２噴孔とが連通し、一方の前記バルブ第１連通孔および一方の前記バルブ第２連通孔が閉塞される第４の状態と、を含む少なくとも４つの状態が切替可能なように配置されていることを特徴とする内燃機関用インジェクタ。 A bottomed cylindrical nozzle body (1) having a high-pressure fuel supply space (11) to which high-pressure fuel is supplied;
A first injection hole (12) and a second injection hole (13) formed at the bottom of the nozzle body and having different specifications for injecting high-pressure fuel into a combustion chamber of an internal combustion engine;
A communication passage (31, 32, 41) for communicating the high-pressure fuel supply space with the first nozzle hole and the second nozzle hole, and rotating the high-pressure fuel supply space, the first nozzle hole, and Communication switching means (3, 4) for switching the communication state with the second nozzle hole ,
The communication path of the communication switching means is
A plurality of valve first communication holes capable of communicating with the first nozzle holes, and a plurality of valve second communication holes capable of communicating with the second nozzle holes,
A first state in which the plurality of valve first communication holes and the plurality of valve second communication holes are closed;
Among the plurality of first valve communication holes, one of the first valve communication holes and the first injection hole communicate with each other, and the other first valve communication hole and the plurality of second valve communication holes are closed. A second state;
Of the plurality of second valve communication holes, one of the second valve communication holes and the second injection hole communicate with each other, and the other second valve communication hole and the plurality of first valve communication holes are closed. A third state;
The other valve first communication hole and the first injection hole communicate with each other, and the other valve second communication hole and the second injection hole communicate with each other. An injector for an internal combustion engine, which is arranged so that at least four states including a fourth state in which the valve second communication hole is closed can be switched . 前記第１噴孔における下流側開口部（１２１）の位置と、前記第２噴孔における下流側開口部（１３１）の位置とは、前記ノズルボデーの径方向にずれていることを特徴とする請求項１に記載の内燃機関用インジェクタ。 The position of the downstream side opening (121) in the first injection hole, wherein the position of the downstream-side opening (131) in the second injection holes, characterized in that shifting in the radial direction before Symbol nozzle body An injector for an internal combustion engine according to claim 1. 前記第１噴孔と前記第２噴孔とは、噴孔径が異なることを特徴とする請求項１または２に記載の内燃機関用インジェクタ。 The injector for an internal combustion engine according to claim 1 or 2, wherein the first nozzle hole and the second nozzle hole have different nozzle hole diameters. 前記第１噴孔および前記第２噴孔における下流側開口部の位置は、相対的に噴孔径が小さい噴孔が、相対的に噴孔径が大きい噴孔よりも、前記ノズルボデーの径方向内側に配置されていることを特徴とする請求項３に記載の内燃機関用インジェクタ。 The position of the downstream opening in the first nozzle hole and the second nozzle hole is such that the nozzle hole having a relatively small nozzle hole diameter is located on the radially inner side of the nozzle body than the nozzle hole having a relatively large nozzle hole diameter. The injector for an internal combustion engine according to claim 3, wherein the injector is disposed. 前記第１噴孔と前記第２噴孔とは、前記ノズルボデーの軸線に対する角度が異なることを特徴とする請求項１ないし４のいずれか１つに記載の内燃機関用インジェクタ。 The injector for an internal combustion engine according to any one of claims 1 to 4, wherein the first nozzle hole and the second nozzle hole have different angles with respect to an axis of the nozzle body. 前記第１噴孔および前記第２噴孔における下流側開口部の位置は、前記ノズルボデーの軸線に対する角度が相対的に小さい噴孔が、前記ノズルボデーの軸線に対する角度が相対的に大きい噴孔よりも、前記ノズルボデーの径方向内側に配置されていることを特徴とする請求項５に記載の内燃機関用インジェクタ。 The position of the downstream opening in the first nozzle hole and the second nozzle hole is such that the nozzle hole having a relatively small angle with respect to the axis of the nozzle body is larger than the nozzle hole having a relatively large angle with respect to the axis of the nozzle body. The injector for an internal combustion engine according to claim 5, wherein the injector is disposed on a radially inner side of the nozzle body.
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