Combined fuel injection valve/ignition plug

• US 6,871,630 B2
• Filed: 09/20/2002
• Issued: 03/29/2005
• Est. Priority Date: 12/06/2001
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Volz, Dieter, Melsheimer, Anja, Herden, Werner, Schmittinger, Simon, Norgauer, Rainer, Wuerfel, Gernot, Deponte, Rene
• Primary Examiner(s): ARGENBRIGHT, TONY MICHAEL
• Application Number:
  US10/467,221
• Publication Number:
  US 20040112328A1
• Time in Patent Office: 921 Days
• Field of Search: 123/266, 123/267, 123/297
• US Class Current: 123/297
• CPC Class Codes: F02M 2200/858 sealing arrangements between injector and engine
• CPC Class Codes: F02M 51/0671 the armature having an elongated valve body attached thereto
• CPC Class Codes: F02M 57/06 the devices being sparking plugs
• CPC Class Codes: F02M 61/14 Arrangements of injectors with respect to engines; Mounting of injectors

Abstract

A fuel injector-spark plug combination comprises a fuel injector for the direct injection of fuel into a combustion chamber of an internal combustion engine and a spark plug with a spark-plug insulator, a first electrode and a second electrode for igniting the fuel injected into the combustion chamber. The fuel injector includes an actuator cooperating with an actuation device, which is in force-locking, operative connection to a valve needle, the valve needle, or a valve-closure member connected thereto, cooperating with a valve-seat surface to form a sealing seat. The valve needle of the fuel injector and the spark-plug insulator of the spark plug are positioned in a shared housing at a biaxial offset.

Claims

1. A fuel injector-spark plug combination, comprising:

a fuel injector for performing a direct injection of a fuel into a combustion chamber of an internal combustion engine, the fuel injector including;

a valve needle,

a valve closure member,

a valve seat surface, one of the valve needle and the valve closure member cooperating with the valve seat surface to form a sealing seat,

an actuating device that is in a force-locking, operative connection to the valve needle, and

an actuator that cooperates with the actuating device;

a spark plug including;

a spark-plug insulator,

a first electrode, and

a second electrode for igniting the fuel injected into the combustion chamber; and

a shared housing, wherein the valve needle and the spark-plug insulator are positioned in the shared housing at a biaxial offset;

wherein the spark-plug insulator is detachably connected to the shared housing; and

wherein the spark-plug insulator is screwed into the shared housing.

2. The fuel injector-spark plug combination as recited in claim 1, wherein:

the shared housing is able to be inserted in a recess of a cylinder head of the internal combustion engine.

3. The fuel injector-spark plug combination as recited in claim 2, further comprising:

a seal by which the shared housing is sealed from the cylinder head of the internal combustion engine.

4. The fuel injector-spark plug combination as recited in claim 1, wherein:

a longitudinal axis of the valve needle is tilted at an angle relative to a longitudinal axis of the spark-plug insulator.

5. The fuel injector-spark plug combination as recited in claim 1, wherein:

the fuel injector is integrated in the shared housing.

6. The fuel injector-spark plug combination as recited in claim 1, further comprising:

a threaded sleeve by which the spark-plug insulator is affixed in the shared housing.

7. A fuel injector-spark plug combination comprising:

a fuel injector for performing a direct injection of a fuel into a combustion chamber of an internal combustion engine, the fuel injector including;

a valve needle,

a valve closure member,

a valve seat surface, one of the valve needle and the valve closure member cooperating with the valve seat surface to form a sealing seat,

an actuating device that is in a force-locking, operative connection to the valve needle, and

an actuator that cooperates with the actuating device;

a spark-plug including;

a spark-plug insulator,

a first electrode, and

a second electrode for igniting the fuel injected into the combustion chamber;

a shared housing, wherein the valve needle and the spark-plug insulator are positioned in the shared housing at a biaxial offset,

a clamping ring by which the spark-plug insulator is affixed on the shared housing, and

a plastic coating provided to the fuel injector and in which the clamping ring is arranged in a form-fitting manner,

wherein the spark-plug insulator is inserted in the shared housing, and

wherein the spark-plug insulator is detachably connected to the shared housing.

8. The fuel injector-spark plug combination as recited in claim 7, wherein:

the spark-plug insulator is directly clipped into the plastic coating.

9. The fuel injector-spark plug combination as recited in claim 7, wherein:

the shared housing is able to be inserted in a recess of a cylinder head of the internal combustion engine.

10. The fuel injector-spark plug combination as recited in claim 9, further comprising:

a seal by which the shared housing is sealed from the cylinder head of the internal combustion engine.

11. The fuel injector-spark plug combination as recited in claim 7, wherein:

a longitudinal axis of the valve needle is tilted at an angle relative to a longitudinal axis of the spark-plug insulator.

12. The fuel injector-spark plug combination as recited in claim 7, wherein:

the fuel injector is integrated in the shared housing.