JP2019196716A5 - - Google Patents
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- JP2019196716A5 JP2019196716A5 JP2018089811A JP2018089811A JP2019196716A5 JP 2019196716 A5 JP2019196716 A5 JP 2019196716A5 JP 2018089811 A JP2018089811 A JP 2018089811A JP 2018089811 A JP2018089811 A JP 2018089811A JP 2019196716 A5 JP2019196716 A5 JP 2019196716A5
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- movable core
- core
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- axial direction
- injection device
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- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- 239000000446 fuel Substances 0.000 claims description 17
Description
本開示の一形態によれば、燃料噴射装置（９０，９０Ｂ，９０Ｃ，９０Ｄ）が提供される。この燃料噴射装置は、燃料を噴射する噴孔（３２）を有し、前記噴孔に連通する第１流路（１０１）が形成された筒状のハウジング（３０）と；前記ハウジング内に固定され、前記第１流路に連通する第２流路（１０２）が形成された筒状の固定コア（４１）と；前記固定コアよりも前記噴孔側における前記第１流路内を前記ハウジングの軸方向（ＡＸ）に沿って往復移動可能に設けられ、前記固定コアの内径よりも大きな外径を有し、第１貫通孔（４２１）を有する第１可動コア（４２）と；前記固定コアと前記第１可動コアとの間における前記第１流路内を前記ハウジングの軸方向に沿って往復移動可能に設けられ、前記第１可動コアの外径よりも小さな外径を有し、第２貫通孔（４３１）を有する第２可動コア（４３）と；通電によって、前記第１可動コアと前記第２可動コアとを前記固定コア側に向かって移動させる磁界を発生するコイル（４４）と；前記第１貫通孔および前記第２貫通孔を前記軸方向に通る軸部（５１）と、前記軸部の前記噴孔側の端部に形成され、前記噴孔を開閉可能な弁部（５２）と、を有するニードル（５０，５０Ｂ）と；前記ニードルを前記噴孔側に向かって付勢するスプリング（６１）と；前記コイルへの前記通電を制御する制御部（８０）と；を備える。前記第１可動コアは、前記第２可動コアに対して前記軸方向における前記噴孔側から前記固定コア側に向かう力を伝達可能に構成され；前記第２可動コアは、前記ニードルに対して前記軸方向における前記噴孔側から前記固定コア側に向かう力を伝達可能に構成され；前記第１可動コアと前記固定コアとの少なくとも一方は、前記第１可動コアが前記固定コアに前記軸方向において接触した状態で、前記第２可動コアが前記ニードルとともに前記軸方向に沿って移動可能な空間（４２２，４２３）を有し、前記制御部は、前記コイルへの前記通電を停止する際に、前記コイルに対して、前記第１可動コアと前記第２可動コアとを前記噴孔側から前記固定コア側に向かって移動させるために供給する電流とは逆向きの電流を供給した後、前記コイルへの前記通電を停止する。 According to an aspect of the present disclosure, a fuel injection device (90, 90B, 90C, 90D) is provided. This fuel injection device has a cylindrical housing (30) having an injection hole (32) for injecting fuel and having a first flow path (101) communicating with the injection hole; fixed in the housing. A tubular fixed core (41) having a second flow path (102) formed therein and communicating with the first flow path; and the housing inside the first flow path closer to the injection hole than the fixed core. A first movable core (42) provided so as to be capable of reciprocating along the axial direction (AX), having an outer diameter larger than the inner diameter of the fixed core, and having a first through hole (421); Provided in the first flow path between the core and the first movable core so as to be capable of reciprocating along the axial direction of the housing, and having an outer diameter smaller than the outer diameter of the first movable core, A second movable core (43) having a second through hole (431); A coil (44) that generates a magnetic field that moves the first movable core and the second movable core toward the fixed core; and passes through the first through hole and the second through hole in the axial direction. A needle (50, 50B) having a shaft portion (51) and a valve portion (52) formed at an end portion of the shaft portion on the injection hole side and capable of opening and closing the injection hole; A spring (61) for urging toward the nozzle hole side; and a control unit (80) for controlling the energization of the coil are provided. The first movable core is configured to be capable of transmitting a force from the injection hole side toward the fixed core side in the axial direction to the second movable core; and the second movable core with respect to the needle. It is configured to be able to transmit a force from the injection hole side toward the fixed core side in the axial direction; at least one of the first movable core and the fixed core has the first movable core attached to the fixed core. in contact in the direction, the second movable core have a space (422, 423) movable along the axial direction together with the needle, wherein, when stopping the energization of the coil After the current is supplied to the coil in the opposite direction to the current supplied to move the first movable core and the second movable core from the injection hole side toward the fixed core side. , The above Stopping the energization of the Le.
Claims (6)
燃料を噴射する噴孔（３２）を有し、前記噴孔に連通する第１流路（１０１）が形成された筒状のハウジング（３０）と、
前記ハウジング内に固定され、前記第１流路に連通する第２流路（１０２）が形成された筒状の固定コア（４１）と、
前記固定コアよりも前記噴孔側における前記第１流路内を前記ハウジングの軸方向（ＡＸ）に沿って往復移動可能に設けられ、前記固定コアの内径よりも大きな外径を有し、第１貫通孔（４２１）を有する第１可動コア（４２）と、
前記固定コアと前記第１可動コアとの間における前記第１流路内を前記ハウジングの軸方向に沿って往復移動可能に設けられ、前記第１可動コアの外径よりも小さな外径を有し、第２貫通孔（４３１）を有する第２可動コア（４３）と、
通電によって、前記第１可動コアと前記第２可動コアとを前記固定コア側に向かって移動させる磁界を発生するコイル（４４）と、
前記第１貫通孔および前記第２貫通孔を前記軸方向に通る軸部（５１）と、前記軸部の前記噴孔側の端部に形成され、前記噴孔を開閉可能な弁部（５２）と、を有するニードル（５０，５０Ｂ）と、
前記ニードルを前記噴孔側に向かって付勢するスプリング（６１）と、
前記コイルへの前記通電を制御する制御部（８０）と、
を備え、
前記第１可動コアは、前記第２可動コアに対して前記軸方向における前記噴孔側から前記固定コア側に向かう力を伝達可能に構成され、
前記第２可動コアは、前記ニードルに対して前記軸方向における前記噴孔側から前記固定コア側に向かう力を伝達可能に構成され、
前記第１可動コアと前記固定コアとの少なくとも一方は、前記第１可動コアが前記固定コアに前記軸方向において接触した状態で、前記第２可動コアが前記ニードルとともに前記軸方向に沿って移動可能な空間（４２２，４２３）を有し、
前記制御部は、前記コイルへの前記通電を停止する際に、前記コイルに対して、前記第１可動コアと前記第２可動コアとを前記噴孔側から前記固定コア側に向かって移動させるために供給する電流とは逆向きの電流を供給した後、前記コイルへの前記通電を停止する、
燃料噴射装置。 A fuel injection device (90, 90B, 90C, 90D),
A tubular housing (30) having an injection hole (32) for injecting fuel, and having a first flow path (101) communicating with the injection hole;
A cylindrical fixed core (41) fixed in the housing and having a second flow path (102) formed therein, the second flow path (102) communicating with the first flow path;
The first flow path on the injection hole side of the fixed core is provided so as to be capable of reciprocating in the axial direction (AX) of the housing, and has an outer diameter larger than an inner diameter of the fixed core. A first movable core (42) having one through hole (421);
It is provided in the first flow path between the fixed core and the first movable core so as to be capable of reciprocating along the axial direction of the housing, and has an outer diameter smaller than the outer diameter of the first movable core. A second movable core (43) having a second through hole (431),
A coil (44) that generates a magnetic field that moves the first movable core and the second movable core toward the fixed core by energization;
A shaft portion (51) passing through the first through hole and the second through hole in the axial direction, and a valve portion (52) formed at an end portion of the shaft portion on the injection hole side and capable of opening and closing the injection hole. ) And a needle (50, 50B) having
A spring (61) for urging the needle toward the injection hole,
A control unit (80) for controlling the energization of the coil,
Equipped with
The first movable core is configured to be capable of transmitting a force from the injection hole side in the axial direction toward the fixed core side to the second movable core,
The second movable core is configured to be capable of transmitting a force from the injection hole side in the axial direction toward the fixed core side to the needle,
At least one of the first movable core and the fixed core is moved along the axial direction by the second movable core together with the needle in a state where the first movable core is in contact with the fixed core in the axial direction. can have a space (422, 423),
The control unit moves the first movable core and the second movable core with respect to the coil from the injection hole side toward the fixed core side when stopping the energization of the coil. After supplying a current in the opposite direction to the current supplied to stop the energization of the coil,
Fuel injection device.
前記ニードルと前記第２可動コアとが固定された固定部（５３，５４）を有し、
前記第２可動コアは、前記固定部を介して、前記ニードルに対して前記軸方向における前記噴孔側から前記固定コア側に向かう力を伝達する、燃料噴射装置。 The fuel injection device according to claim 1, wherein
A fixed part (53, 54) to which the needle and the second movable core are fixed,
The second movable core is a fuel injection device that transmits a force from the injection hole side in the axial direction toward the fixed core side to the needle via the fixed portion.
前記軸部は、前記第２可動コアよりも前記固定コア側に、径方向に前記第２貫通孔の径よりも大きく突き出した突出部（５４）を有し、
前記第２可動コアは、前記突出部に前記軸方向において接触することによって、前記ニードルに対して前記軸方向における前記噴孔側から前記固定コア側に向かう力を伝達する、燃料噴射装置。 The fuel injection device according to claim 1, wherein
The shaft portion has a protruding portion (54) radially protruding toward the fixed core side with respect to the second movable core and larger than the diameter of the second through hole.
The second movable core is a fuel injection device that transmits a force from the injection hole side in the axial direction toward the fixed core side to the needle by contacting the protrusion in the axial direction.
前記第１可動コアが前記通電によって前記固定コア側に向かって移動する第１距離よりも、前記第１可動コアが前記固定コアに前記軸方向において接触した状態から、前記第２可動コアが前記通電によって前記固定コア側に向かって移動する第２距離の方が長い、燃料噴射装置。 The fuel injection device according to any one of claims 1 to 3,
From the state in which the first movable core is in contact with the fixed core in the axial direction more than the first distance in which the first movable core moves toward the fixed core by the energization, the second movable core is A fuel injection device in which a second distance moved toward the fixed core side by energization is longer.
前記燃料としてガスを噴射する、燃料噴射装置。 The fuel injection device according to any one of claims 1 to 4, wherein:
A fuel injection device for injecting gas as the fuel.
前記制御部は、前記コイルに対して、前記第１可動コアと前記第２可動コアとを前記噴孔側から前記固定コア側に向かって移動させる第１電流を供給した後、前記第１電流よりも小さな第２電流を供給する、
燃料噴射装置。 The fuel injection device according to any one of claims 1 to 5 ,
The controller supplies the coil with a first current that moves the first movable core and the second movable core from the injection hole side toward the fixed core side, and then supplies the first current. Supply a second current smaller than
Fuel injection device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018089811A JP6753432B2 (en) | 2018-05-08 | 2018-05-08 | Fuel injection device |
| PCT/JP2019/017232 WO2019216202A1 (en) | 2018-05-08 | 2019-04-23 | Fuel injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018089811A JP6753432B2 (en) | 2018-05-08 | 2018-05-08 | Fuel injection device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2019196716A JP2019196716A (en) | 2019-11-14 |
| JP2019196716A5 true JP2019196716A5 (en) | 2020-04-30 |
| JP6753432B2 JP6753432B2 (en) | 2020-09-09 |
Family
ID=68468254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018089811A Active JP6753432B2 (en) | 2018-05-08 | 2018-05-08 | Fuel injection device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6753432B2 (en) |
| WO (1) | WO2019216202A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7376337B2 (en) * | 2019-12-19 | 2023-11-08 | 株式会社Soken | fuel injection valve |
| DE102020201973A1 (en) | 2020-01-31 | 2021-08-05 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gas metering valve for internal combustion engines |
| KR20220061725A (en) * | 2020-11-06 | 2022-05-13 | 엘에스일렉트릭(주) | Coil part and EV relay include the same |
| DK181102B1 (en) * | 2021-06-24 | 2022-12-15 | Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland | Fuel valve assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19948238A1 (en) * | 1999-10-07 | 2001-04-19 | Bosch Gmbh Robert | Fuel injector |
| JP2013167194A (en) * | 2012-02-15 | 2013-08-29 | Toyota Motor Corp | Fuel injection valve |
| CN109312700B (en) * | 2016-08-26 | 2021-08-03 | 日立汽车系统株式会社 | Fuel injection valve |
-
2018
- 2018-05-08 JP JP2018089811A patent/JP6753432B2/en active Active
-
2019
- 2019-04-23 WO PCT/JP2019/017232 patent/WO2019216202A1/en active Application Filing
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