IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0068279
(2008-02-05)
|
등록번호 |
US-7789322
(2010-09-27)
|
우선권정보 |
JP-2007-64101(2007-03-13) |
발명자
/ 주소 |
- Yamamoto, Norio
- Mochizuki, Kouichi
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
6 |
초록
▼
A fuel injection valve includes a main body having a nozzle hole and a compression chamber. The main body accommodates a compression unit for pressurizing fuel accumulated in the compression chamber. The fuel injection valve further includes a valve element being axially movable in the main body. Th
A fuel injection valve includes a main body having a nozzle hole and a compression chamber. The main body accommodates a compression unit for pressurizing fuel accumulated in the compression chamber. The fuel injection valve further includes a valve element being axially movable in the main body. The valve element includes a valve portion and a pressure-receiving portion. The valve portion is movable in an opening direction to open the nozzle hole in response to pressure of fuel being pressurized by the compression unit and applied to the pressure-receiving portion. A regulating unit is provided in the compression chamber for regulating movement of the valve element with respect to the opening direction.
대표청구항
▼
What is claimed is: 1. A fuel injection valve comprising: a main body having a nozzle hole and a compression chamber, the compression chamber adapted to accumulating fuel; a compression unit for pressurizing fuel in the compression chamber; a valve element being axially movable in the main body, th
What is claimed is: 1. A fuel injection valve comprising: a main body having a nozzle hole and a compression chamber, the compression chamber adapted to accumulating fuel; a compression unit for pressurizing fuel in the compression chamber; a valve element being axially movable in the main body, the valve element including a valve portion and a pressure-receiving portion, the valve portion being movable in an opening direction to open the nozzle hole in response to pressure of fuel being pressurized by the compression unit and applied to the pressure-receiving portion; and a regulating unit provided in the compression chamber for regulating movement of the valve element with respect to the opening direction, wherein the regulating unit includes a projection and a contact portion, the projection projects from a sidewall of the valve element to the compression chamber, the sidewall being exposed to the compression chamber, the contact portion is provided to an inner wall of the main body, the inner wall being exposed to the compression chamber, the contact portion is adapted to being in contact with the projection when the valve element moves in the opening direction by a predetermined distance, the compression unit includes a piston and a driving device, the driving device is adapted to biasing the piston to reduce a volume of the compression chamber for pressurizing fuel in the compression chamber, the main body includes a partition provided in the compression chamber to divide the compression chamber into a first chamber and a second chamber, the second chamber is located closer to the nozzle hole than the first chamber, the second chamber accommodating the pressure-receiving portion, the first chamber and the nozzle hole are located on opposite sides of the second chamber, the first chamber accommodating the piston, the partition has a communication passage, which communicates the first chamber with the second chamber, the communication passage has an opening on the side of the second chamber, and the opening is located closer to the nozzle hole than the pressure-receiving portion. 2. The fuel injection valve according to claim 1, wherein the partition and the communication passage are located in the main body, and the partition has an end axially movably supporting the valve element. 3. The fuel injection valve according to claim 1, wherein the projection and the contact portion are located between the partition on the side of the second chamber and the pressure-receiving portion, the projection is located closer to the nozzle hole than the contact portion, the projection has a tip end opposed to an inner wall defining the second chamber, and the tip end and the inner wall therebetween define a throttle. 4. The fuel injection valve according to claim 1, further comprising: a first biasing member accommodated in the communication passage of the partition, wherein the first biasing member biases the seat member so as to block the compression chamber from the supply passage. 5. The fuel injection valve according to claim 4, further comprising: a second biasing member accommodated in the compression chamber to bias the piston so as to increase a volume of the compression chamber. 6. The fuel injection valve according to claim 1, wherein the driving device is a piezo actuator. 7. A fuel injection valve comprising: a main body having a nozzle hole and a compression chamber, the compression chamber adapted to accumulating fuel; a compression unit for pressurizing fuel in the compression chamber; a valve element being axially movable in the main body, the valve element including a valve portion and a pressure-receiving portion, the valve portion being movable in an opening direction to open the nozzle hole in response to pressure of fuel being pressurized by the compression unit and applied to the pressure-receiving portion; and a regulating unit provided in the compression chamber for regulating movement of the valve element with respect to the opening direction, wherein the regulating unit includes a projection and a contact portion, the projection projects from a sidewall of the valve element to the compression chamber, the sidewall being exposed to the compression chamber, the contact portion is provided to an inner wall of the main body, the inner wall being exposed to the compression chamber, the contact portion is adapted to being in contact with the projection when the valve element moves in the opening direction by a predetermined distance, the compression unit includes a piston and a driving device, and the driving device is adapted to biasing the piston to reduce a volume of the compression chamber for pressurizing fuel in the compression chamber, further comprising: a seat member accommodated in the compression chamber, wherein the seat member blocks the compression chamber from the supply passage when the piston pressurizes fuel in the compression chamber, the main body has a supply passage for leading fuel from an outside of the compression chamber into the compression chamber, and the seat member communicates the compression chamber with the supply passage when the piston stops pressurizing of fuel in the compression chamber.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.