Injection device for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10174735-B2
Application number	US-201314416340-A
Country	US
Kind code	B2
Filing date	Jul 17, 2013
Priority date	Jul 24, 2012
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

An injection device for an internal combustion engine includes a fuel delivery pump and a high-pressure pump which are connected to one another via a low-pressure fuel line. A high-pressure accumulator is connected to the high-pressure pump. At least one injector is connected via a high-pressure fuel line to the high-pressure accumulator. The injection device also has at least one fuel return line which is connected to the high-pressure accumulator and/or to the at least one injector. The fuel return line issues into the low-pressure fuel line which connects the fuel delivery pump and the high-pressure pump to one another. At least one air bleed valve is arranged in the course of the low-pressure fuel line or on the high-pressure pump or on a filter housing.

First claim

The invention claimed is:

1. An injection device for an internal combustion engine, the injection device comprising:
a fuel delivery pump and a high-pressure pump connected to one another via a low-pressure fuel line;
a high-pressure reservoir connected to said high-pressure pump;
at least one injector connected to said high-pressure reservoir via a high-pressure fuel line;
at least one fuel return line connected directly to a leakage connection of said at least one injector;
at least one air bleed valve disposed at a location selected from the group consisting of
a course of said low-pressure fuel line directly upstream of said high-pressure pump, and
at a low pressure side in said high-pressure pump;

said at least one fuel return line issuing into said low-pressure fuel line in between said at least one air bleed valve and said fuel delivery pump;
said at least one air bleed valve being a Schrader valve or a hydraulic coupling and said at least one air bleed valve including an actuator for automatically opening and/or closing said at least one air bleed valve.

2. The injection device according to claim 1 , wherein said at least one air bleed valve is a 2/2-way valve or a 3/2-way valve.

3. The injection device according to claim 1 , which comprises a fuel filter disposed inline in the course of said low-pressure fuel line connecting said fuel delivery pump and said high-pressure pump to one another.

4. The injection device according to claim 3 , wherein said at least one air bleed valve is integrated into said fuel filter or is arranged between said fuel filter and said high-pressure pump.

5. An arrangement for bleeding an injection device, the arrangement comprising:
an injection device according to claim 1 ;
a collecting container for collecting fuel; and
a line leading from an outlet of said at least one air bleed valve into said collecting container for delivering fuel from said at least one bleed valve to said collecting container at an end of a bleeding process.

6. The arrangement according to claim 5 , wherein said collecting container is configured to be operated with vacuum pressure.

7. The arrangement according to claim 5 , which comprises a suction pump disposed in said line between said air bleed valve and said collecting container.

Assignees

• Continental Automotive Gmbh

Inventors

• Ritsch Tobias
• Anetsberger Daniel
• Klesse Christoph
• Lingener Uwe

Classifications

• F02M63/028 Primary

  Returnless common rail system · CPC title

• F02M63/0059

  Arrangements of valve actuators · CPC title

• F02M37/22

  Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system · CPC title

• F02M37/0058

  Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank · CPC title

• F02M63/0225

  Fuel-injection apparatus having a common rail feeding several injectors (F02M63/0003 takes precedence); Means for varying pressure in common rails; Pumps feeding common rails · CPC title