KR102330890B1 - Mounting bracket for fuel injection systems - Google Patents

Abstract

The mounting bracket 2 for the fuel injection system 1 is used for connection of the fuel guiding component 5 and the fuel injection valve 9 , the fuel nozzle 8 of the fuel injection valve 9 , the electrical connector An electrical terminal 15 of the fuel injection valve 9 to which 16 can be connected, and a connecting body 18 are provided. The connecting body 18 can be inserted into a recess 26 provided on the fuel nozzle 8 when connecting the fuel guiding component 5 and the fuel injection valve 9 . The connecting body 18 comprises a blocking piece 21 . The connecting body 18 is configured such that the blocking piece 21 of the connecting body 18 is connected to the electrical connector ( blocking the electrical terminal 15 for the electrical connector 16 in the assembly position, in which the connecting body 18 is adjusted into a recess 26 provided on the fuel nozzle 8 . formed to release. Also presented is a fuel injection system (1) comprising said mounting bracket (2).

Description

MOUNTING BRACKET FOR FUEL INJECTION SYSTEMS

The present invention relates to a mounting bracket for a fuel injection system for connection of a fuel injection valve with a component for guiding fuel, and a fuel injection system comprising the mounting bracket. In particular, the present invention relates to the field of fuel injection systems for mixer compression type spark ignition internal combustion engines.

From DE 10 2013 200 982 A1, a mounting bracket for a fuel injection system for connection of a fuel injection valve with a component for guiding fuel is known, and a fuel injection system comprising said mounting bracket. In the case of the known mounting bracket, the fuel nozzle of the fuel injection valve can be arranged partially in a receiving chamber of the connector body, a connecting body is provided, the connecting body being arranged in a recess of the connector body connecting with the receiving chamber; , a fuel nozzle may be supported along the longitudinal axis of the receiving chamber on the connecting body. The connecting body may be formed as a U-shaped retainer. In this case, the connecting body comprises an elastically deformable member, which is arranged such that the connecting body enables elastic support of the fuel nozzle on the connector body along the longitudinal axis.

In the case of a mounting bracket, such as is known for example from DE 10 2013 200 982 A1, in principle the assembly of the fuel injection valve between the fuel guiding component and the cylinder head is without a connecting body, which can be formed as a U-shaped retainer, or with a connecting body There is a problem that it is possible even if it is not arranged according to the function. In this case, an axial movement of the fuel injection valve may occur during operation, for example along the longitudinal axis of the receiving chamber, due to the absence or improper positioning of the connecting body. As a result, the seal, provided for example in the form of an O-ring, may be damaged, resulting in fuel spillage on the mounting bracket.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mounting bracket for a fuel injection system and a fuel injection system that enables improved construction and functionality while avoiding the disadvantages of the prior art.

A mounting bracket according to the invention having the features of claim 1 , a mounting bracket according to the invention having the features of claim 9 and a fuel injection system according to the invention having the features of claim 10 have improved construction and functionality. It has the advantage that it becomes possible and/or that the mentioned disadvantages of the prior art are avoided. In particular, it is ensured that operation is possible only with proper assembly, which ensures operation according to the function of the mounting bracket.

By means of the measures presented in the dependent claims, preferred improvements of the mounting bracket presented in claim 1 , the mounting bracket presented in claim 9 and the fuel injection system presented in claim 10 are possible.

The mounting brackets and fuel injection system presented in particular are suitable for applications for gasoline direct injection. In this case, the fuel guiding component is preferably formed as a fuel distributor, in particular as a fuel distributor block. Said fuel distributor is used on the one hand for the distribution of fuel to a plurality of fuel injection valves, in particular high-pressure injection valves. On the other hand, the fuel distributor can be used as a common fuel reservoir for the fuel injection valves. In this case, the fuel injection valves are preferably connected to the fuel distributor via corresponding mounting brackets. During operation, fuel injection valves inject the fuel required for the combustion process under high pressure into each combustion chamber. In this case, the fuel is compressed by means of a high-pressure pump and delivered into the fuel distributor via a high-pressure line while the amount is controlled.

The improvement according to claim 2 has the advantage that a preferred support of the fuel nozzle of the fuel injection valve is made possible via the connecting body. In this case, depending on the embodiment, corresponding guides can be provided for guiding the connecting body at least substantially perpendicular to the longitudinal axis of the fuel nozzle.

The improvement according to claim 3 has the advantage that anchoring via the connecting body is possible only when the fuel nozzle is properly positioned inside the mounting bracket.

Preferred refinements are possible according to claim 4 . In this case, a preferred guide for the connecting body can also be realized, in which the connecting pin is adjusted linearly through the through bore of the connector body.

According to claim 5, there is a preferred improvement in which it can also be achieved, by means of a guide, that the connecting body can be inserted into a through bore of the connector body or the like only when the fuel injection valve is positioned in a specific assembly position with respect to the connector body. possible. In this case, a desirable vanishing prevention according to claim 6 can also be achieved. A preferred guide can be realized according to claim 7 .

The improvement according to claim 8 has the advantage that the electrical terminal can be mechanically shut off, so long as the fuel injection valve is improperly connected with the component for guiding the fuel through the connecting body. Only after a proper connection can the electrical connector be connected to the electrical terminal of the fuel injection valve. Accordingly, disconnection of the fuel injection valve may only be possible when the electrical connector is previously unplugged.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which corresponding elements are denoted by corresponding reference numerals.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing an excerpt of a fuel injection system including a mounting bracket according to an embodiment during assembly;
Fig. 2 shows the mounting bracket shown in Fig. 1 of the embodiment during assembly;
Fig. 3 is a view showing the mounting bracket shown in Fig. 1 of the embodiment in an assembled state;
4 is a schematic diagram showing an excerpt of a mounting bracket according to a further embodiment of the present invention;

1 shows an excerpted schematic diagram of a fuel injection system 1 with a mounting bracket 2 according to an embodiment during assembly. The fuel injection system 1 comprises a tank 3 , from which fuel can be delivered via a high-pressure pump 4 into a component 5 , which guides the fuel. In this embodiment, the fuel guiding component 5 is formed as a fuel distributor 5 , in particular a fuel distributor block 5 . The fuel injection system 1 can be used in particular for a mixer compression type spark ignition type internal combustion engine. The mounting bracket 2 is particularly suitable for the fuel injection system 1 .

The fuel injection system 1 comprises a connector body 6 , which in this embodiment is formed as a cup-shaped connector body 6 . The connector body (6) comprises a receiving chamber (7), the fuel nozzle (8) of the fuel injection valve (9) of the fuel injection system (1), along its longitudinal axis (10), the receiving chamber of the connector body (6) (7) is inserted into Thus, the situation shown in FIG. 1 is achieved.

The fuel distributor 5 comprises further connectors 11 , 12 , 13 , which can be realized with connector bodies formed correspondingly to the connector body 6 for connecting further fuel injection valves. The fuel guided in the fuel distributor 5 can thus be distributed onto a plurality of fuel injection valves 9 .

The fuel injection valve 9 has an electrical terminal 15 . An electrical connector 16 may be connected to the electrical terminal 15 . The electrical connector 16 is not an essential component of the mounting bracket 2 of the illustrated embodiment.

For simplicity of illustration, the electrical connector 16 of the embodiment is only shown in FIG. 3 .

In this embodiment, a guide 17 for the connecting body 18 is formed on the electrical terminal 15 . The guide 17 guides the connecting body 18 linearly and in this embodiment perpendicular to the longitudinal axis 10 . The connecting body 18 comprises connecting pins 19 , 20 and one blocking piece 21 . In this case, a protrusion 22 is formed on the blocking piece 21, which protrusion is such that the electric connector 16 cannot be connected to the electric terminal 15 in the assembled position shown in FIG. It protrudes past the electrical terminal 15 of

The fuel injection system 1 of this embodiment will be described in detail below with reference to FIGS. 2 and 3 .

In figure 2 the mounting bracket 2 shown in figure 1 of the embodiment is shown during assembly. In this case, the fuel nozzle 8 of the fuel injection valve 9 is along the longitudinal axis 10 so that the connecting pins 19 , 20 of the connecting body 18 reach into the cavity 23 of the connector body 6 . is continuously inserted into the receiving chamber 7 of the connector body 6 until ) is located in the assembly position to block the

In Fig. 3, the mounting bracket 2 shown in Fig. 1 of the embodiment is shown in an assembled state. Starting from the position shown in FIG. 2 , the connecting body 18 is now adjusted in the direction 24 . In this case, the adjustment of the connecting body 18 is preferably carried out perpendicular to the longitudinal axis 10 of the fuel nozzle 8 . The connecting body 18 is guided perpendicular to the longitudinal axis 10 of the fuel nozzle 8 on the guide 17 .

During the adjustment of the connecting body 18 , the connecting pins 19 , 20 reach into the through bores 25 , and only the through bore 25 for the connecting pin 20 is indicated for the sake of simplicity of illustration. In this case, also the connecting pins 19 , 20 of the connecting body 18 are inserted into the recesses 26 of the fuel nozzle 8 on both sides. The recess 26 is formed in this embodiment as a groove 26 which is rotationally symmetric with respect to the longitudinal axis 10 .

In the assembly position shown in FIG. 3 , in which the connecting body 18 is inserted into a recess 26 provided on the fuel nozzle 8 , the electrical terminal 15 for the electrical connector 16 is unblocked. In this embodiment, the blocking piece 21 of the connecting body 18 unblocks the electrical terminal 15 .

The electrical connector 16 may then be connected to the electrical terminal 15 .

Accordingly, the connecting body 18 is such that the blocking piece 21 of the connecting body 18 in the assembled position is not adjusted with respect to the recess 26 provided on the fuel nozzle 8 . Blocking the electrical terminal 15 for the electrical connector 16 and blocking the electrical terminal 15 for the electrical connector 16 in the assembly position in which the connecting body 81 is adjusted into a recess 26 provided on the fuel nozzle. formed to release. The connecting body 18 can be adjusted in this embodiment with respect to a recess 26 provided on the fuel nozzle 8 perpendicular to the longitudinal axis 10 of the fuel nozzle 8 .

In this embodiment, the connecting body 18 can be guided on the guide 17 via the blocking piece 21 . In this case, the blocking piece 21 can interact with the guide 17 so as to enable an anti-disappearance fixation of the connecting body 18 on the guide 17 . Assembly without the connecting body 18 is thus prevented.

Thus, a reliable connection between the connector body 6 and the fuel nozzle 8 is ensured during operation by the connecting pins 19 , 20 of the connecting body 18 . The reason is that only in this case the electrical connector 16 can be connected to the electrical terminal 15 . In this case, by the interaction of the projection 22 of the blocking piece 21 and the electrical connector 16 , the connection from the through bores 25 in the opposite direction to the direction 24 in the state in which the electrical connector 16 is connected An anchoring of the connecting body 18 that prevents unintended movement of the connecting pins 19 , 20 of the body 18 can also be achieved. Accordingly, additional fixing of the connecting body 18 in the assembled state may be omitted in some cases.

4 shows an excerpted schematic diagram of a mounting bracket 2 of a fuel injection system 1 according to a further embodiment. In this embodiment, the connecting body 18 is fixed on the connector 16 . The connecting pins 19 , 20 of the connecting body 18 are formed so that during assembly they are inserted through the through bores 25 of the cup-shaped connector body 6 . The connecting body 18 is only in the assembly position in which the connecting pins 19 , 20 of the connecting body 18 are inserted into the recess 26 ( FIG. 1 ) provided on the fuel nozzle 8 , the electrical connector 16 is It is formed so as to be able to be inserted into the electrical terminal 15 of the fuel injection valve and is secured on the electrical connector 16 . In this case, when inserting the electrical connector 16 into the electrical terminal 15 , the connection pins 19 , 20 are passed through the through bores 25 of the cup-shaped connector body 6 . It reaches its end position where it is extended.

The invention is not limited to the described embodiments.

1: fuel injection system
2: Mounting bracket
3: Tank
4: high pressure pump
5: fuel guide component, fuel distributor, fuel distributor block
6: Connector body
7: Receiving chamber
8: fuel nozzle
9: Fuel injection valve
10: breeder
11: Additional connectors
12: Additional connectors
13: Additional connectors
15: electrical terminal
16: electrical connector
17: Guide
18: connecting body
19: connecting pin
20: connecting pin
21: block
22: protrusion
23: Common
24: direction
25: through bore
26: recess

Claims (10)

A mounting bracket (2) for a fuel injection system (1) for connection of a fuel-guiding component (5) and a fuel injection valve (9), the fuel nozzle (8) of the fuel injection valve (9), an electrical connector ( An electrical terminal 15 of the fuel injection valve 9 to which 16 can be connected, and a connection body 18 are provided, the connection body 18 being connected to the component 5 for guiding the fuel and the fuel injection In the mounting bracket, which can be inserted into a recess (26) provided on the fuel nozzle (8) when connecting a valve (9),
The connecting body (18) comprises at least one blocking piece (21), the connecting body (18) being in the recess (26) in which the connecting body (18) is provided on the fuel nozzle (8). In the assembled position, which is not adjusted for the connection body 18 , the blocking piece 21 of the connection body 18 blocks the electrical terminal 15 for the electrical connector 16 , and the connection body 18 is positioned on the fuel nozzle 8 . A mounting bracket for a fuel injection system, characterized in that it is configured to unblock the electrical terminal (15) for the electrical connector (16) in an assembly position adapted into the recess (26) provided in the 2. The connection body (18) according to claim 1, wherein the connecting body (18) is adjustable relative to the recess (26) provided on the fuel nozzle (8), at least substantially perpendicular to the longitudinal axis (10) of the fuel nozzle (8). A mounting bracket for a fuel injection system, characterized in that it has. 3. A connector body (6) according to claim 1 or 2, wherein a connector body (6) comprising a receiving chamber (7) is provided, the connector body (6) and the fuel nozzle (8) being assembled with the fuel nozzle (8) is formed so as to be inserted into the receiving chamber 7 of the connector body 6 along its longitudinal axis 10 while the fuel nozzle 8 is inserted into the receiving chamber 7 of the connector body 6 during , the connecting body 18 is connected from an assembly position in which the connecting body 18 is not adjusted with respect to the recess 26 provided on the fuel nozzle 8 , the connecting body 18 is connected to the fuel nozzle 8 . 8) A mounting bracket for a fuel injection system, characterized in that it can be adjusted into an assembly position which is adjusted relative to the recess (26) provided on it. 4. The connector body (6) according to claim 3, wherein the connector body (6) is formed as a cup-shaped connector body (6), and/or the connector body (6) has at least one through bore extending through the connector body (6). (25), wherein the connecting body (18) comprises at least one connecting pin (19, 20), the connecting pin (19, 20) being such that the fuel nozzle (8) is connected to the connector body (6) When inserted into the receiving chamber 7 of 25) a mounting bracket for a fuel injection system, characterized in that it extends through. 3. A guide (17) according to claim 1 or 2, wherein a guide (17) is formed on the fuel injection valve (9), and the connecting body (18) is guided on the guide (17) of the fuel injection valve (9). Features a mounting bracket for the fuel injection system. 6. The connecting body (18) according to claim 5, wherein the connecting body (18) is guided at least substantially perpendicular to the longitudinal axis (10) of the fuel nozzle (8) on the guide (17) of the fuel injection valve (9), and/or the A mounting bracket for a fuel injection system, characterized in that the connecting body (18) is guided in an anti-dissipation manner on the guide (17) of the fuel injection valve (9). 7. Mounting bracket according to claim 6, characterized in that the blocking piece (21) of the connecting body (18) is guided on the guide (17) of the fuel injection valve (9). 3 . The fuel nozzle ( 8 ) according to claim 1 , wherein the blocking piece ( 21 ) of the connecting body ( 18 ) comprises a protrusion ( 22 ), the protrusion ( 22 ) of which the connecting body ( 18 ) is connected to the fuel nozzle ( 8 ). ) so that in the assembled position not inserted into the recess 26 provided on the fuel injection valve 9 , the electrical connector 16 cannot be connected to the electrical terminal 15 of the fuel injection valve 9 . A mounting bracket for a fuel injection system, characterized in that it protrudes past the electrical terminals (15) of the Mounting bracket (2) for a fuel injection system (1) for connection of a fuel guiding component (5) and a fuel injection valve (9), the fuel nozzle (8) of the fuel injection valve (9), the fuel injection An electrical terminal 15 of the valve 9 , and an electrical connector 16 are provided, the electrical connector 16 connectable to the electrical terminal 15 of the fuel injection valve 9 , the connection body 18 ) can be inserted into a recess (26) provided on the fuel nozzle (8) when connecting the fuel injection valve (9) with the component (5) for guiding fuel,
The connecting body 18 is fixed on the electrical connector 16 , and the connecting body 18 is disposed on the recess 26 in which the connecting body 18 is provided on the fuel nozzle 8 . for a fuel injection system, characterized in that the electrical connector (16) is formed and fixed on the electrical connector (16) so that it can be inserted into the electrical terminal (15) of the fuel injection valve (9) only in the assembled position in which it is arranged mounting bracket. At least one component (5) for guiding fuel, at least one fuel injection valve (9) and at least one mounting bracket (2) according to any one of claims 1, 2 and 9 In the fuel injection system (1) comprising:
The fuel injection system (1), wherein the fuel injection valve (9) is latched on the component (5) for guiding fuel through the mounting bracket (2).

Images