AN INJECTION VALVE HAVING MOVABLE VALVE MEMBER TECHNICAL FIELD

The present invention relates to injection valves used for spraying fuel into the combustion chamber in internal combustion engines. PRIOR ART

Said injection valves generally comprise a valve body, and a valve member which functions as a piston inside said body. Injection valves essentially transfer the high pressured fuel into the combustion chamber, provided in the engine, in a controlled manner. Inside said injection valves, fuel passes through pipes with different diameters by making a cavitation flow, and fuel passes between a valve member, provided in the valve region, and the seating region provided at the inlet portion of one of said pipes, and exits the valve region. The controlled passage of fuel in injection valves becomes possible by means of the vertical movement of the valve member. In general, the valve member is provided on a holder. The bubbles, formed during flow of the fuel, hit the valve member and as a result of this, the bubbles explode. In case the explosions continuously take place in the same region, the form of the valve member will be deteriorated and the valve member will not be able to function correctly, and therefore, it is desired that the valve member rotates on the holder in a free manner. However, due to high pressure, this is not possible.

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 an injection valve, 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 an injection valve where the valve member is rotatable around itself. 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 an injection valve for use in internal combustion engines and having at least one valve member permitting controlled passage of the fuel, and at least one holder which holds said valve member. Accordingly, the present invention is characterized in that on the holder, at least one flow channel, which is in gap form through which the fuel can enter, is provided between the valve member and at least one housing wherein the valve member is partially disposed.

In a preferred embodiment of the subject matter invention, the diameter of an inlet portion of the housing is greater than the diameter of the valve member.

In another preferred embodiment of the subject matter invention, the flow channel is provided in recess form on the inner wall of the housing. In another preferred embodiment of the subject matter invention, the flow channels are asymmetrical.

BRIEF DESCRIPTION OF THE FIGURES In Figure 1 , a representative view of the valve region of the subject matter injection valve is given.

In Figure 2, a representative view of the holder and the valve member of the subject matter injection valve is given.

In Figure 3, a view of an alternative application of the holder of the subject matter injection valve is given.

REFERENCE NUMBERS

10 Valve region

20 Inlet pipe

30 Throat

40 Passage pipe

50 Seating region

60 Outlet pipe

70 Valve member 80 Holder

81 Housing

82 Inlet portion

83 Flow Channel

THE DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the subject matter injection valve is explained with references to examples without forming any restrictive effect in order to make the subject more understandable.

As can be seen in Figure 1 , in injection valves, there is an inlet pipe (20) in the valve region (10), a throat (30) provided in the form of a pipe with smaller diameter on said inlet pipe (20), a passage pipe (40) provided on said throat (30) and having a greater diameter than the throat (30), and a seating region (50) provided at the outlet portion of said passage pipe (40) and whereon a valve member (70) is seated. At the continuation of the seating region (50), there is the outlet pipe (60) wherein the valve member (70) moves. There is at least one holder (80) whereon the valve member (70) is positioned. The valve member (70) moves upwardly and downwardly in the vertical plane together with said holder (80).

Said seating region (50) widens conically outwardly from the inlet of the passage pipe (40). Since the seating region (50) widens in a conical manner, when the valve member (70) is placed on the seating region (50), fuel passage in between is prevented. The valve member (70) is partially placed into at least one housing (81) provided on the holder (80). The valve member (70) is preferably provided in sphere form, and the housing (81), wherein said valve member (70) is partially placed, is provided in the form of a recess having semi-sphere form. In an embodiment of the present invention, the diameter of the inlet portion (82), defined on the side of the housing (81) facing the seating region (50), is provided to be greater than the diameter of the valve member (70). Thus, a flow channel (83), which is in gap form wherein the fuel can enter between the valve member (70) and the housing (81), is defined at the periphery of the valve member (70). By means of this, the fuel, entering into the flow channel (83), provides partial disconnection between the valve member (70) and the housing (81 ), and it provides free rotation of the valve member (70). In another embodiment of the present invention, flow channels (83) are provided in recess form on the inner wall of the housing (81). Said flow channels (83) preferably begin from the inlet portion (82). The flow channel (83) can extend in the inlet portion (82) from one side of the valve member (70) towards the other side of the valve member (70).

In other words, the flow channel (83) is formed in the form of a gap provided between the valve member (70) and the housing (81) and wherein fuel can enter. The fuel, entering into the flow channel (83), provides disconnection between the valve member (70) and the housing (81). Thus, the valve member (70) can freely rotate. Moreover, the flow channels (83) are provided in an asymmetrical manner, and the flow is provided to be greater at one side of the valve member (70), and the valve member (70) is rotated thanks to the fuel flow.

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.