SEAL STRUCTURE OF FUEL PASSAGE AND FUEL INJECTION VALVE HAVING THE SEAL STRUCTURE

Title:

SEAL STRUCTURE OF FUEL PASSAGE AND FUEL INJECTION VALVE HAVING THE SEAL STRUCTURE

Document Type and Number:

WIPO Patent Application WO/2005/085629

Kind Code:

A1

Abstract:

A seal structure (30) of a fuel injection valve, comprising an annular seal member (31) installed in a pressure lead-in chamber (21) to seal a high-pressure fuel in the pressure lead-in chamber (21) so that the fuel does not leak to a low pressure side through a clearance (28) formed between an injector housing (2) and a valve body (6) in which a valve piston (5) is slidably inserted. A rigid backup ring (32) is disposed between the clearance (28) and the seal member (31) to prevent the seal member (31) from being extruded into the clearance (28). A plurality of claws (33) are formed on the backup ring (32) and the seal member (31) is fixed to the backup ring (32) with the claws (33). Thus, the seal member (31) can be prevented from being raised.

More Like This:

WO/2007/065745	HOLD-DOWN MEANS OF A MAGNET GROUP IN A FUEL INJECTOR
WO/1999/057432	FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES
JP2008508465	Deep pocket valve seat assembly and assembly method for modular fuel injectors with lift setting assembly for operating gaps

Inventors:

KAWASUMI HIROSHI (JP)

Application Number:

PCT/JP2005/003663

Publication Date:

September 15, 2005

Filing Date:

February 25, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

BOSCH CORP (JP)
KAWASUMI HIROSHI (JP)

International Classes:

F02M61/16; F02M47/00; F02M47/02; F02M51/00; F02M55/00; F02M55/02; (IPC1-7): F02M61/16

Foreign References:

JP2003028021A	2003-01-29
JPH026857U	1990-01-17

Attorney, Agent or Firm:

Takano, Masatoshi (15-14 Shiba 3-chom, Minato-ku Tokyo, JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: FUEL-INJECTION VALVE

Next Patent: IMPROVED WAVE ENERGY CONVERTER (WEC) DEVICE AND SYSTEM