Fuel injection valve

Patent metadata

Field	Value
Publication number	US-11415095-B2
Application number	US-202016984540-A
Country	US
Kind code	B2
Filing date	Aug 4, 2020
Priority date	Aug 6, 2019
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A fuel injection valve includes a nozzle portion for injecting fuel, a fuel inlet port, a fuel supply main passage for supplying the fuel from the fuel inlet port to the nozzle portion, a pressure sensor for detecting fuel pressure in the fuel supply main passage, and a fuel introduce passage for supplying the fuel from the fuel supply main passage to the pressure sensor. The fuel supply main passage includes a first fuel supply passage extending in a first direction from the fuel inlet port to the pressure sensor and a second fuel supply passage extending in a second direction from the pressure sensor to the nozzle portion.

First claim

What is claimed is:

1. A fuel injection valve comprising:
a nozzle portion for injecting fuel therefrom;
a fuel inlet port formed in a valve body;
a fuel supply main passage formed in the valve body for supplying the fuel from the fuel inlet port to the nozzle portion;
a pressure sensor provided in the valve body for detecting fuel pressure in the fuel supply main passage; and
a fuel introduce passage for supplying the fuel from the fuel supply main passage to the pressure sensor,
wherein the fuel supply main passage extends in a first direction from the fuel inlet port to the pressure sensor and then further extends in a second direction from the pressure sensor to the nozzle portion, wherein:
the fuel supply main passage includes a first fuel supply passage connected to the fuel inlet port and a second fuel supply passage connected to the nozzle portion,
a passage connecting portion is formed for connecting the first fuel supply passage and the second fuel supply passage to each other,
the first fuel supply passage extends from the fuel inlet port in the first direction opposite to the second direction to the nozzle portion,
the second fuel supply passage extends from the passage connecting portion to the nozzle portion,
the fuel introduce passage is connected to the passage connecting portion, and
the fuel introduce passage is a separately branched passage which is branched off from the passage connecting portion and is formed separately from the first fuel supply passage and the second fuel supply passage.

2. The fuel injection valve according to claim 1 , wherein:
an interposed member is provided between the pressure sensor and the valve body, in which the passage connecting portion is formed, and
the fuel introduce passage is formed in the interposed member.

3. The fuel injection valve according to claim 1 , wherein:
the valve body has a shape defining a longitudinal center, and
the fuel inlet port is formed at a position separated from the longitudinal center of the valve body.

4. The fuel injection valve according to claim 3 , wherein:
the fuel inlet port is formed on a peripheral surface of the valve body.

5. The fuel injection valve according to claim 4 , wherein:
the nozzle portion is provided on one end of the valve body,
the pressure sensor is provided on the other end of the valve body,
the fuel inlet port is located between the nozzle portion and the pressure sensor,
the passage connecting portion is located between the fuel inlet port and the pressure sensor,
the first fuel supply passage extends between the fuel inlet port and the passage connecting portion, and
the second fuel supply passage extends between the passage connecting portion and the nozzle portion.

6. The fuel injection valve according to claim 5 , wherein:
the fuel inlet port is formed on a side closer to the nozzle portion.

Assignees

• Denso Corp

Inventors

• Kondou Atsushi
• Kamiya Tomonori
• Okuno Yoshinori

Classifications

• F02M55/008 Primary

  Arrangement of fuel passages inside of injectors · CPC title

• F02M2200/315

  for damping fuel pressure fluctuations · CPC title

• F02M2200/247

  Pressure sensors · CPC title

• F02M57/005

  the devices being sensors · CPC title

• F02M61/042 Primary

  The valves being provided with fuel passages · CPC title