WO2016102676A1

WO2016102676A1 - A fastener for fuel injectors

Info

Publication number: WO2016102676A1
Application number: PCT/EP2015/081176
Authority: WO
Inventors: Umit Centez
Original assignee: Robert Bosch Gmbh
Priority date: 2014-12-25
Filing date: 2015-12-23
Publication date: 2016-06-30

Abstract

The present invention relates to a fastener (30) in order to provide fixation of the injector on the engine in internal combustion engines and connected to the injector (10) from the one side and which stops onto a fixed member provided on the engine from at least one dampening lever (34) provided on the other side. As an improvement, the present invention is characterized in that in order to provide connection of the fastener (30) to the injector (10), there is an assembly section (33) provided at the vicinity of the middle of a body (31) of the fastener (30) and there are at least two upper levers (34a) provided on the upper side of the body (31), and there are at least two bottom levers (34b) provided on the lower side of the body (31).

Description

SPECIFICATION

A FASTENER FOR FUEL INJECTORS TECHNICAL FIELD

The present invention relates to a fastener for constraining the movement of the fuel injector used in internal combustion engines. PRIOR ART

In internal combustion engines, fasteners are used for constraining the movement of the fuel injector. Particularly in gasoline systems, the connection of the injector is realized by means of the fastener in order to prevent damaging of the injector and the other items positioned around the injector as a result of the movement of the injector due to the pressure formed by means of the explosions, which occur inside the combustion chamber. The fastener behaves like a spring, and it dampens the forces applied on the injector, and it provides the fixation of the injector. The fastener has dampening levers in order to fulfil the dampening function. The fastener is fixed to the body of the injector from one side, and it is stopped onto a fixed region on the engine from the dampening levers provided on the other side. Said fixed region is in general the fuel chamber of the injector. In said embodiment, when a load is applied on the dampening levers, plastic deformation occurs and as a result of this, the fastener loses its function.

As a result, because of all of the abovementioned problems, an improvement is required in the related technical field. BRIEF DESCRIPTION OF THE INVENTION

The present invention relates to a fastener, for eliminating the above mentioned disadvantages and for bringing new advantages to the related technical field. The main object of the present invention is to provide a fastener which continues the function thereof without being subject to plastic deformation. Another object of the present invention is to provide a fastener whose production and assembly is facilitated.

In order to realize all of the abovementioned objects and the objects which are to be deducted from the detailed description below, the present invention is a fastener in order to provide fixation of the injector on the engine in internal combustion engines and connected to the injector from the one side and which stops onto a fixed member provided on the engine from at least one dampening lever provided on the other side. Accordingly, in order to provide connection of the fastener to the injector, there is an assembly section provided at the vicinity of the middle of a body of the fastener and there are at least two upper levers provided on the upper side of the body, and there are at least two bottom levers provided on the lower side of the body. Thus, when a force is applied on the injector, the fastener bends from the two sides, and provides dampening. In a preferred embodiment of the subject matter invention, the dampening levers are provided at a vicinity of the four corners of the body.

In another preferred embodiment of the subject matter invention, the body is a flat plate. In another preferred embodiment of the subject matter invention, the body is provided in X- like form.

In another preferred embodiment of the subject matter invention, a middle region of the body where said assembly section is positioned is narrower than the upper side and the lower side of the body.

In another preferred embodiment of the subject matter invention, there are at least one each elbows provided in the connections of the dampening levers to the body. In another preferred embodiment of the subject matter invention, the dampening levers comprise at least one each outer faces which stop on a fixed member on the engine and which stop on a seating region defined on the injector.

In another preferred embodiment of the subject matter invention, the body is provided at a sufficient size in a manner providing some section of the injector to remain between the upper levers and bottom levers when the fastener is fixed to the injector. Thus, the energy accumulation occurring in the elbow of each lever is diverged from each other. In another preferred embodiment of the subject matter invention, the fastener is connected to the connection body provided so as to make the electrical connection of the injector. In another preferred embodiment of the subject matter invention, the assembly section is configured so as to be tightened between at least two extensions provided on the connection body. Thus, the assembly of the fastener to the injector is realized.

In another preferred embodiment of the subject matter invention, the assembly section comprises levers which at least partially wrap the connection body. Thus, the assembly of the fastener to the injector is realized.

In another preferred embodiment of the subject matter invention, the assembly section is an opening which can receive at least one extension provided on the connection body. Thus, the assembly of the fastener to the injector is realized.

BRIEF DESCRIPTION OF THE FIGURES

In Figure 1 , a representative lateral view of the subject matter fastener on the injector is given.

In Figure 1 a, a representative isometric view of the subject matter fastener on the injector is given.

In Figure 2, a representative lateral view of the subject matter fastener on the injector is given.

In Figure 2a, a representative isometric view of an alternative embodiment of the subject matter fastener on the injector is given.

In Figure 3, a representative lateral view of the subject matter fastener on the injector is given.

In Figure 3a, a representative isometric view of an alternative embodiment of the subject matter fastener on the injector is given.

In Figure 1 b, 1 c, 2b, 2c, 3b and 3c, the representative isometric views of the alternative embodiments of the subject matter fastener are given. In Figure 4 and 4a, the representative view of another alternative embodiment of the subject matter fastener is given.

REFERENCE NUMBERS

10 Injector

1 1 Injector body

12 Seating region

20 Connection body

21 Extension

22 Electrical connection housing

30 Fastener

31 Body

32 Intermediate region

33 Assembly section

34 Dampening lever

34a Upper lever

34b Bottom lever

35 Outer face

36 Elbow

THE DETAILED DESCRIPTION OF THE INVENTION In this detailed description, the subject matter fastener (30) is explained with references to examples without forming any restrictive effect only in order to make the subject more understandable.

As can be seen in Figure 1 , 2 and 3, the subject matter fastener (30) is fixed onto an injector (10). Said injector (10) has an injector body (1 1 ), and a connection body (20) positioned on said injector body (1 1 ). A seating region (12) is defined on the side of the injector body (1 1 ) facing the connection body (20). On one side of the connection body (20), there is at least one electrical connection housing (22) used for providing electrical connection to the injector (10).

With reference to Figure 1 b, 1 c, 2b, 2c, 3b and 3c, the subject matter fastener (30) comprises a body (31 ), and dampening levers (34) provided at the vicinity of the four corners of said body (31 ). Said dampening levers (34) extend outwardly from the body (31 ) so as to remain on the same side of the body (31 ). Since the dampening levers (34) are provided at the vicinity of the corner of the body (31 ), the distances between the dampening levers (34) are obtained. The dampening levers (34) are provided in an integrated manner to the body (31 ), and the joining sections are defined as an elbow (36).

The body (31 ) is at least partially a flat plate. The body (31 ) is provided in X-like form. Thus, an intermediate region (32), narrowed on the body (31 ), is obtained. The two dampening levers (34), provided on the upper side of the body (31 ), are defined as upper levers (34a), and the two dampening levers (34), provided on the lower side of the body (31 ), are called bottom levers (34b). The sides of the upper levers (34a) and the bottom levers (34b) facing outwardly are defined as outer face (35).

With reference to Figure 1 a, 2a and 3a, while the fastener (30) is fixed onto the injector (10), the connection body (20) at least partially remains between the upper levers (34a) and the bottom levers (34b). Accordingly, while the bottom levers (34b) extend from both sides of the connection body (20), said bottom levers (34b) stop onto the seating region (12) defined on the injector body (1 1 ) from the outer faces (35). The upper levers (34a) extend at two sides of the connection body (20). The outer faces (35) of the upper levers (34a) stop onto any fixed member (not illustrated in the figure) connected to the engine. Said fixed member is in general the fuel chamber of the injector (10).

The assembly manner of the fastener (30) to the injector (10) changes depending on the type and form of the injector (10).

With reference to Figure 1 and 1 a, in an embodiment of the present invention, two edges of the narrowed middle region (12) are defined as assembly section (33). Accordingly, two extensions (21 ) provided in the connection body (20) partially tighten the assembly section (33). In other words, the assembly section (33) is tightened between the extensions (21 ) of the connection body (20), and provides connection of the fastener (30) to the injector (10). Accordingly, while the fastener (30) is connected to the injector (10) through the body (31 ), free bending of the dampening levers (34) becomes possible.

With reference to Figure 2 and 2a, in an embodiment of the present invention, there are two assembly sections (33) provided on two sides of the middle region (32). Said assembly section (33) is one each lever which at least partially wraps the connection body (20). Since said middle region (32) is narrowed, the assembly sections (33) can wrap the cylindrical connection body (20) along a sufficiently long line. Accordingly, while the fastener (30) is connected to the injector (10) through the body (31 ), free bending of the dampening levers (34) becomes possible. With reference to Figure 3 and 3a, in an embodiment of the present invention, there is an assembly section (33) provided in opening form at the vicinity of the middle region (32). An extension (21 ) of the connection body (20) enters into said assembly section (33), and provides the connection of the fastener (30) to the injector (10). Accordingly, while the fastener (30) is connected to the injector (10) through the body (31 ), the free bending of the dampening levers (34) becomes possible.

Due to the explosions occurring in the combustion chamber, when a force is applied on the injector (10), said force is transferred to the bottom levers (34b) stopped onto the injector body (1 1 ) and thus said force is transferred to the fastener (30). Accordingly, the fastener (30) is tightened between the injector body (1 1 ) stopped on one side and fixed member stopped on the other side. Since the contact of the fastener (30) to the body (31 ) and to the fixed member is realized only through the dampening levers (34), the upper levers (34a) and the bottom levers (34b) bend towards each other. Thus, the force, applied on the injector (10), is dampened by the fastener (30).

During bending of the dampening levers (34), energy (stress) accumulations occur on the elbows (36) provided at the joint of the dampening levers (34) and the body (31 ) on the fastener (30). When the energy, accumulated on the elbow (36), exceeds a certain value, it may lead to plastic deformation on the fastener (30). Since four levers, namely bottom levers (34a) and upper levers (34b), are provided in the subject matter fastener (30), the amount of energy applied on each dampening lever (34) is reduced. Thus, the dampening levers (34) preserve the function thereof for longer duration under greater forces.

Moreover, in the subject matter fastener (30), since the body (31 ) extends between the upper levers (34a) and the bottom levers (34b), the elbow (36) regions are diverged from each other as much as possible. Thanks to this, the combination of the energies accumulated in the elbow (36) regions is prevented. In other words, the energy, accumulated on one elbow (36), does not affect the other elbow (36). As can be seen in Figure 4 and 4a, realization of alternative embodiments of the fastener (30) having similar properties is possible. The protection scope of the present invention is set forth in the annexed Claims and cannot be restricted to the illustrative disclosures given above, under the detailed description. It is because a person skilled in the relevant art can obviously produce similar embodiments under the light of the foregoing disclosures, without departing from the main principles of the present invention.

Claims

A fastener (30) in order to provide fixation of the injector on the engine in internal combustion engines and connected to the injector (10) from the one side and which stops onto a fixed member provided on the engine from at least one dampening lever (34) provided on the other side, characterized in that in order to provide connection of the fastener (30) to the injector (10), there is an assembly section (33) provided at the vicinity of the middle of a body (31 ) of the fastener (30) and there are at least two upper levers (34a) provided on the upper side of the body (31 ), and there are at least two bottom levers (34b) provided on the lower side of the body (31 ).

A fastener (30) according to Claim 1 , characterized in that the body (31 ) is a flat plate.

A fastener (30) according to Claim 2, characterized in that the dampening levers (34) are provided at a vicinity of the four corners of the body (31 ).

A fastener (30) according to Claim 2, characterized in that the body (31 ) is provided in X-like form.

A fastener (30) according to Claim 4, characterized in that a middle region (32) of the body (31 ) where said assembly section (33) is positioned is narrower than the upper side and the lower side of the body (31 ).

A fastener (30) according to any one of the preceding claims, characterized by comprising at least one each elbows (36) provided in the connections of the dampening levers (34) to the body (31 ).

A fastener (30) according to any one of the preceding claims, characterized in that the dampening levers (34) comprise at least one each outer faces (35) which stop on a fixed member on the engine and which stop on a seating region (12) defined on the injector (10).

A fastener (30) according to any one of the preceding claims, characterized in that the body (31 ) is provided at a sufficient size in a manner providing some section of the injector (10) to remain between the upper levers (34a) and bottom levers (34b) when the fastener is fixed to the injector (10).

9. A fastener (30) according to any one of the preceding claims, characterized in that the fastener (30) is connected to the connection body (20) provided so as to make the electrical connection of the injector (10).

10. A fastener (30) according to Claim 9, characterized in that the assembly section (33) is configured so as to be tightened between at least two extensions (21 ) provided on the connection body (20).

1 1 . A fastener (30) according to Claim 9, characterized in that the assembly section (33) comprises levers, which at least partially wrap the connection body (20).

12. A fastener (30) according to Claim 9, characterized in that the assembly section (33) is an opening which can receive at least one extension (21 ) provided on the connection body (20).