DE102009012732A1 - Turbocharger for internal combustion engine, has compressor housing for receiving compressor wheel, and cycle valve for boost-pressure control - Google Patents

Abstract

The turbocharger (10) has a compressor housing (12) for receiving a compressor wheel (18), and a cycle valve (20) for boost-pressure control. The cycle valve is connected directly with the compressor housing. A high-pressure area (14) of the compressor housing is connected directly with a connection (24) of the cycle valve over a connecting channel (30).

Description

The The invention relates to a turbocharger with a timing valve.

One Exhaust gas turbocharger consists of a compressor and a turbine, which are connected by a common shaft. there The shaft is arranged in one between the compressor and the turbine bearing housing stored. The turbine delivers, driven by the exhaust gases of the engine, the drive energy for the compressor. in principle elevated the compressor the boost pressure in the intake tract of the engine such that while the intake stroke a larger amount Air enters the cylinder, thereby increasing the performance of respective internal combustion engine is enabled. To reach the optimal boost pressure, a wastegate is usually used, in a conventional manner the clock valve sets a duty cycle. In this case, the boost pressure to time proportion dependent on the clock ratio on the Transfer control box. The pressure inside the control box is actuated by a Membrane a control rod whose variable stroke the respective opening angle the wastegate increases or reduced. It proves to be disadvantageous that the timing valve by means of hoses, Sealing elements and clamp connections between the compressor housing and the control box is connected. Due to the large number of interfaces to be sealed are these disturbing and thus maintenance-prone and costly.

It The object of the present invention, a turbocharger with a timing valve available to ask, which avoids the above-mentioned disadvantages and thereby largely maintenance-free and inexpensive.

The solution the task is carried out according to the invention by a turbocharger the features of claim 1. Advantageous embodiments of the invention are in the subclaims specified.

Of the Turbocharger according to the invention includes a compressor housing for receiving a compressor wheel, and a timing valve for boost pressure control. This is according to the invention Timing valve connected directly to the compressor housing. By the direct Connection between the timing valve and the compressor housing is formed a more compact overall engine. It also accounts for this Way additional maintenance-intensive components, such as hoses, sealing elements and / or clamps, which on the one hand reduces the assembly costs and on the other hand, potential defects be minimized. In this way, the cost of assembly, Dismantling and for possible Repairs significantly reduced. Furthermore, the savings of components and interfaces optimizes engine compartment usage and by shorter ones Lines the supply and / or discharge of the exhaust gases easily, quickly and uncomplicated. Furthermore, by the saving of components, the engine weight reduced.

Advantageous Is it possible, that a high-pressure region of the compressor housing via a first connecting channel is directly connected to a first port of the timing valve, wherein preferably also a suction of the compressor housing via a second connection channel directly to a second terminal of the Clock valve is connected. In this way, each starting from the high pressure area and the suction area of the compressor housing inside lying connection channels right up to the surface the compressor housing, which represents the separation point of the clock valve mounting, guided. The connections of the clock valve are arranged so that this, after a successful installation of the timing valve on the compressor, a form permanent connection with the connection channels. In this way can bells, Sealing elements and the complex laying of individual hose lines saved and the assembly of the clock valve can be simplified. there components, as well as weight and thus costs are saved, thermodynamic Advantages achieved and the durability of the connections between the Turbocharger and the timing valve improved.

In a preferred embodiment is the compressor housing over a Connecting flange directly connected to the timing valve, wherein advantageous the connection flange, a first connection opening of the first connection channel and in particular a second connection opening of the second connection channel can have. Thus, you can the respective connection openings the connection channels or the connections the clock valve formed directly through the connecting flange or in the flange connection surface be arranged. In this way, the assembly is simplified and a connection of the individual connections and connection channels can done without an additional and possibly failure-prone connection must be created in the engine compartment. Furthermore, here too again components, as well as weight and thus costs saved and the Improved durability of the connections between the turbocharger and the timing valve.

Advantageously, the connection between the timing valve and the compressor housing is technically gas-tight, so that it can be ensured that a permanent and interference-free connection can be ensured without additional sealing elements between the timing valve and the compressor housing. In this way, the assembly between rule the timing valve and the compressor housing uncomplicated and fast.

In a particularly preferred embodiment the timing valve has a third connection for connecting a Control box on which the actuation the wastegate is used. This will ensure that the control box can be mounted quickly and easily can.

The The invention further relates to an internal combustion engine with at least a turbocharger.

All in all Seen arises through the turbocharger and the internal combustion engine according to the invention a more compact overall engine and it is made possible by eliminating individual Components, like hoses, Clamps, sealing elements and / or other components the weight reduced, reduces assembly costs and potential leakage or impurity be minimized. Furthermore, the cost of assembly, disassembly and for possible Repairs significantly reduced and by the saving of components and Interfaces optimized engine compartment utilization. This will be a simple, fast, uncomplicated, maintenance-free and cost-effective connection of the compression housing enabled with the timing valve.

following The invention will be explained in more detail with reference to the accompanying figure. Further Advantages and designs arise from the claims.

It shows:

1 a schematic view of a turbocharger according to the invention shown in partial section;

The in 1 in partial section turbocharger 10 has a compressor housing 12 with a high pressure area 14 and a suction area 16 , as well as a compressor wheel 18 which is between the high pressure area 14 and the intake area 16 is arranged on. Directly on the compressor housing 12 arranged, is a timing valve 20 which is shown in the illustrated embodiment without further items such as associated armature, coils or pistons. The connection between the compressor housing 12 and the timing valve 20 can be done via a connecting flange, not shown. The timing valve 20 is in the illustrated embodiment via a fastener 22 fixed to the compressor housing 12 connected and has a first, a second and a third connection 24 . 26 . 28 on. The high pressure area 14 of the compressor housing 12 is via an inner first connecting channel 30 directly with the first connection 24 of the mounted clock valve 20 and the intake area 16 of the compressor housing 12 is via a second connection channel 32 directly to the second port 26 of the clock valve 20 connected. There are sealing elements 34 provided so that the first connection channel 30 technically gas-tight with the first connection 24 and the second connection channel 32 technically gas-tight with the second connection 26 connected is. About the third connection 28 of the clock valve 20 is a control box, not shown, with the timing valve 20 , or the turbocharger 10 connectable.

10

turbocharger

12

compressor housing

14

High pressure area

16

suction

18

compressor

20

timing valve

22

fastener

24

first connection

26

second connection

28

third connection

30

first connecting channel

32

second connecting channel

34

sealing element

Claims (9)

Turbocharger ( 10 ) comprising a compressor housing ( 12 ) for receiving a compressor wheel ( 18 ), and a timing valve ( 20 ) for boost pressure control, characterized in that the timing valve ( 20 ) directly to the compressor housing ( 12 ) connected is. Turbocharger ( 10 ) according to claim 1, characterized in that a high pressure area ( 14 ) of the compressor housing ( 12 ) via a first connection channel ( 30 ) directly with a first connection ( 24 ) of the clock valve ( 20 ) connected is Turbocharger ( 10 ) according to claim 1 or 2, characterized in that a suction area ( 16 ) of the compressor housing ( 12 ) via a second connecting channel ( 32 ) directly to a second port ( 26 ) of the clock valve ( 20 ) connected is. Turbocharger ( 10 ) according to one of claims 1 to 3, characterized in that the compressor housing ( 12 ) via a connecting flange directly to the timing valve ( 20 ) connected is. Turbocharger ( 10 ) according to claim 4, characterized in that the connecting flange has a first connection opening of the first connecting channel ( 30 ) having. Turbocharger ( 10 ) according to claim 4 or 5, characterized in that the connecting flange has a second connection opening of the second connecting channel ( 32 ) having. Turbocharger ( 10 ) according to one of claims 1 to 6, characterized in that the connection between the timing valve ( 20 ) and the compressor housing ( 12 ) is technically gas-tight. Turbocharger ( 10 ) according to one of claims 1 to 7, characterized in that the timing valve ( 20 ) has a third connection for connecting a control box. Internal combustion engine with at least one turbocharger ( 10 ) according to one of claims 1 to 8.