Injector

• US 20120180755A1
• Filed: 01/13/2012
• Published: 07/19/2012
• Est. Priority Date: 01/13/2011
• Status: Abandoned Application

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: Jung, Uwe, Marzahn, Gabriel, Reisinger, Wolfgang
• Application Number:
  US13/350,185
• Publication Number:
  US 20120180755A1
• Time in Patent Office: Days
• US Class Current: 123/294
• CPC Class Codes: F02M 2200/31 Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
• CPC Class Codes: F02M 2200/315 for damping fuel pressure fluctuations
• CPC Class Codes: F02M 47/02 of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
• CPC Class Codes: F02M 47/027 Electrically actuated valves draining the chamber to release the closing pressure

Abstract

An injector includes a control valve for opening a connection between a control chamber for controlling a nozzle needle position and a prechamber of a fluid return line, wherein a pressure compensation device is arranged in the prechamber for compensating a change in a prechamber pressure.

Claims

1. An injector, comprising:

a control valve for opening a connection between a control chamber for controlling a nozzle needle position and a prechamber of a fluid return line, and

a pressure compensation means arranged in the prechamber for compensating for a change in a prechamber pressure.

2. The injector according to claim 1, wherein the pressure compensation means has at least one body which is sealed off with respect to the prechamber and in which there is arranged a compressible medium.

3. The injector according to claim 2, wherein the compressible medium comprises a gas.

4. The injector according to claim 2, wherein the compressible medium comprises a foamed material.

5. The injector according to claim 2, wherein an actuator is provided for actuating the control valve and wherein the body is formed as a double-walled diaphragm which seals off the actuator with respect to the prechamber.

6. The injector according to claim 2, wherein the body is in the shape of a ring, ball or polygon.

7. An internal combustion engine, comprising:

at least one combustion chamber, and at least one injector arranged to inject fuel into the at least one combustion chamber, each injector comprising;

a control valve for opening a connection between a control chamber for controlling a nozzle needle position and a prechamber of a fluid return line, and

a pressure compensation means arranged in the prechamber for compensating for a change in a prechamber pressure.

8. The internal combustion engine according to claim 7, wherein the pressure compensation means has at least one body which is sealed off with respect to the prechamber and in which there is arranged a compressible medium.

9. The internal combustion engine according to claim 8, wherein the compressible medium comprises a gas.

10. The internal combustion engine according to claim 8, wherein the compressible medium comprises a foamed material.

11. The internal combustion engine according to claim 8, wherein an actuator is provided for actuating the control valve and wherein the body is formed as a double-walled diaphragm which seals off the actuator with respect to the prechamber.

12. The internal combustion engine according to claim 8, wherein the body is in the shape of a ring, ball or polygon.

13. A method for controlling an injector for an internal combustion engine, comprising:

controlling a control valve to open a connection between a control chamber for controlling a nozzle needle position and a prechamber of a fluid return line, and

compensating for a change in a prechamber pressure using a pressure compensation means arranged in the prechamber.

14. The method according to claim 13, wherein the pressure compensation means has at least one body which is sealed off with respect to the prechamber and in which there is arranged a compressible medium.

15. The method according to claim 14, wherein the compressible medium comprises a gas.

16. The method according to claim 14, wherein the compressible medium comprises a foamed material.

17. The method according to claim 14, wherein an actuator is provided for actuating the control valve and wherein the body is formed as a double-walled diaphragm which seals off the actuator with respect to the prechamber.

18. The method according to claim 14, wherein the body is in the shape of a ring, ball or polygon.