Fuel injection system

• US 20020148446A1
• Filed: 06/21/2002
• Published: 10/17/2002
• Est. Priority Date: 06/25/1997
• Status: Active Grant

• Current Assignee: Karl Gmelin
• Original Assignee: Karl Gmelin
• Inventors: Gmelin, Karl
• Granted Patent: US 6,718,949 B2
• Time in Patent Office: Days
• US Class Current: 123/470
• CPC Class Codes: F02B 2075/125 Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
• CPC Class Codes: F02M 2200/8023 the assembly involving use of quick-acting mechanisms, e.g. clips
• CPC Class Codes: F02M 2200/803 using clamp elements and fastening means; e.g. bolts or screws
• CPC Class Codes: F02M 2200/856 characterised by mounting injector to fuel or common rail, or vice versa
• CPC Class Codes: F02M 2200/858 sealing arrangements between injector and engine
• CPC Class Codes: F02M 61/14 Arrangements of injectors with respect to engines; Mounting of injectors
• CPC Class Codes: F02M 69/465 of fuel rails
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A fuel injection system for direct injection of fuels into at least one combustion chamber of an internal combustion engine has at least one fuel injection valve for each combustion chamber which can be inserted at a spray section into a respective receptacle bore hole, which is designed on the cylinder head of the internal combustion engine and has a fuel inlet opening on an inlet section. This fuel injection system also has a fuel distributor line which has a fuel outlet opening for each fuel inlet opening of the fuel injection valve. A tubular transition piece is arranged between the fuel inlet opening of each fuel injection valve and the respective fuel outlet opening and can be snarlingly connected to the fuel inlet opening of the respective fuel injection valve and to the fuel outlet opening of the fuel distributor line so that it can move within predetermined limits.

Claims

1. A fuel injection system for directly injecting fuel into at least one combustion chamber of an internal combustion engine, the internal combustion engine including a cylinder head, the fuel injection system comprising:

at least one fuel injection valve cooperating with the at least one combustion chamber and including;

a spray section for inserting into a receptacle bore hole in the cylinder head, and

an inlet section having a fuel inlet opening;

a fuel distributor line having a fuel outlet opening for the at least one fuel injection valve, the fuel distributor line being contestable to the fuel inlet opening of the at least one fuel injection valve; and

a receptacle element situated on the fuel outlet opening of the fuel distributor line, the receptacle element snarlingly accommodating the fuel inlet opening of the at least one fuel injection valve to form a first sealing arrangement, the first sealing arrangement securing the at least one fuel injection valve in the receptacle element at the inlet section and enabling the at least one fuel injection valve to pivot in a first predetermined angle range,

wherein the cylinder head has a partial spherical-shaped supporting face, the partial spherical-shaped supporting face being provided at the receptacle bore hole and on a side of the cylinder head which faces the fuel distributor line, and

wherein the at least one fuel injection valve further includes a supporting section, the supporting section being supported on the partial spherical-shaped supporting face to form an arrangement enabling the at least one fuel injection valve to pivot in a second predetermined angle range, and a second sealing arrangement securing the at least one fuel injection valve in the receptacle bore hole at the spray section.

2. The fuel injection system according to claim 1, wherein the partial spherical-shaped supporting face concentrically surrounds the receptacle bore hole.

3. The fuel injection system according to claim 1, further comprising:

a sealing element,

wherein the spray section of the at least one fuel injection valve is mounted on the sealing element to pivot the at least one fuel injection valve within the second predetermined angle range in the receptacle bore hole, and

wherein a midpoint of a curvature of the partial spherical-shaped supporting face is located substantially near the sealing element.

4. The fuel injection system according to claim 1, wherein the supporting section of the at least one fuel injection valve includes at least one toroidal support member being capable of resting against the partial spherical-shaped supporting face without depending on a swivel position of the at least one fuel injection valve.

5. The fuel injection system according to claim 1,

wherein the receptacle element surrounds the inlet section of the at least one fuel injection valve which is inserted into the receptacle element, and

wherein the inlet section has a sealing element which is slidably displaceable along a wall of the receptacle element.

6. The fuel injection system according to claims 1, further comprising:

a supporting body insertable into the receptacle bore hole, wherein the partial spherical-shaped supporting face is provided on the supporting body.

7. The fuel injection system according to claim 5, wherein the supporting body has a ring shape and surrounds the spray section of the at least one fuel injection valve.