DE6912770U - PIPE CONNECTION FOR DOUBLE PIPE EXHAUST SYSTEM - Google Patents

Description

PATENT LAWYERS! DIPL. ING. C. STOEPEL · DIPL. ING. W. GOLLWITZEB DIPL. ING. MINOR

LA V DAtT / PALATINATE ■ AM SCHÜTZENHOF

2 March 8, 1969

Paul Gillet GMBH, Edenkoben / Palatinate

"Pipe connection for double-pipe exhaust systems"

The innovation concerns a pipe connection for double pipe exhaust systems, in particular with multi-cylinder engines of larger displacement and V-engines of greater power, in particular but engines with six cylinders upwards to increase the Motor power and can also be used for design reasons. These exhaust systems are often used as double pipes guided on one side of the vehicle below the body floor.

For splitting the exhaust impulses into two separate ones However, the fundamental frequency of the exhaust sound is halved, which often results in low humming tones, especially near the pipes Adjust idle speed. This phenomenon can be eliminated in a number of ways, the best of which is sub-arrangement

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larger resonators close to the engine, which is usually the case is not possible for structural reasons.

There is still the solution for the two front ones Cross-connect exhaust pipes as close as possible behind the engine. There are already a wide variety of embodiments of this solution known.

For example, sheets that are pushed over are used, which form a small additional volume between the two tubes, whereby the pipes themselves are connected to this small chamber through perforations. Another known embodiment sees one Press body from two shell halves, which contain both the pipes and the pressed-in cross connections.

In the known embodiments, the couplings are always aligned perpendicular to the flow direction of the exhaust gases, whereby the desired and desired coupling and mixing effect between the two lines does not reach its optimum can, as pulsation resistances occur.

The innovation is accordingly based on the task of creating a pipe connection for double-pipe exhaust systems which these resistances are largely reduced.

The innovation solves the problem set, based on the known embodiment, with one consisting of two shell halves Pressed body, characterized in that each shell half has a cross connection running at an acute angle to the direction of flow of the exhaust gases has, in such a way that these cross connections run in opposite directions when the shell halves are collapsed, wherein between the cross connections formed in this way each half

Pipe cross-cut there is a partition plate. This divider Depending on the circumstances, it can extend over the area of the cross connections, additionally over half or over Extend the entire pipe cross-section of the exhaust pipe.

Furthermore, after the. Cross connect area a Cross-sectional constriction in the pipes can be provided by a bead.

The design according to the innovation initially eliminates the pulsation and flow resistances that have occurred up to now significantly reduced, as well as the exhaust gas back pressure, since the phase-shifted Pressure surges in the two exhaust pipes in front of the cross connections are distributed, resulting in a more uniform / gas strand has the consequence. The acoustic coupling of the two pipes is implemented in an optimal way. Through the partition you can the gas strands in the two cross-connections of half the pipe cross-section do not interfere with each other. Due to the narrowing after the cross connection the overflow of the exhaust gases from one line to the other is still favored. Constructively there is the advantage that two Shell halves of the same fit can be joined together to form the pipe connection.

The cross-connection according to the invention can advantageously also be combined with a silencer, the cross-connection is built into a flat resonator housing and in the area of the cross connection and in the areas following this of the two adjacent tubes perforations are provided within the housing.

Other features of the innovation and details of the by

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the same advantages achieved emerge from the following description one of the accompanying drawings, for example, illustrated embodiments of the subject of the innovation.

Fig. 1 shows the pipe connection according to the innovation in

Top view, in

Fig. 2 is a side view of Fig. 1,

Fig. 3 is a longitudinal section along the line Π-ΙΙ of Fig. 1,

Finally, FIG. 4 is an expanded embodiment.

The pipe cross connection consists of two half-shells 1 and 2 same training, each with two, half the line cross-section comprehensive, longitudinal, semicircular channel embossings 3 and 4 are provided. Both semicircular longitudinal channels are connected by an embossing with the same cross-sectional shape and cross-sectional size arranged at an acute angle. To put together Edge areas 6 and 7 and a central area 8 are provided, which at the same time separates the two longitudinal tubes 9 and 10, which when joining two such shell halves arise.

If two such shell halves 1 and 2 are joined together Furthermore, a cross connection is created, which is formed from the two expressions 5 in the shell half 1 and 11 in the shell half 2 is. The two expressions 5 and 11, which run at an acute angle to the direction of the expressions 3 and 4, intersect in the cross-connection area.

In order to now have two overcurrent

To create channels, a plate is provided in the area of the forms 5 and 11, which, as shown in the drawing, z. B. can extend to about the middle of the adjacent tubes 9 and 10 formed by the shell halves 1 and 2. It is, depending on the respective conditions, of course also possible to make this sheet 11 narrower so that it is extends only over the actual cross-connection area, but it can also be made wider so that it is in the area of Cross-connection also halved the entire pipe cross-section.

In order to encourage the overflow of the gases between the two lines, the cross-connection area can then be used a cross-sectional constriction can be provided by a bead 13.

The entire cross-connection described above can be combined with a silencer, as shown in FIG. Here are the cross connections 14 and then areas 15, 16 of the adjacent pipelines are surrounded by a resonator housing 17. in the In the area of the cross connection 14, perforations 18 are provided in the pipelines, and perforations 19 in the following area. The case 17 can be filled with a sound absorbent 20 in a manner known per se.

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Claims (6)

Protection claims; 1.) Pipe connection for double pipe exhaust systems, consisting of a pressed body formed from two shell halves, characterized in that each shell half has one which extends at an acute angle to the direction of flow of the exhaust gases Having cross-connection, such that these cross-connections run in opposite directions when the shell halves are collapsed, wherein a partition plate is arranged between the cross-connections formed in this way in each case half a pipe cross-section. 2.) Pipe connection for double pipe exhaust systems according to claim 1, characterized in that this Trenntäech extends over the area of the cross connections. 3.) Pipe connection for double pipe exhaust systems according to claim 1, characterized in that this partition plate Over the area of the cross-connections and about half the pipe cross-section of the exhaust pipe extends. 4.) pipe connection for double pipe exhaust systems, according to claim 1, characterized in that this partition plate extends over the area of the cross-connections and additionally the entire pipe cross-section of the exhaust pipe. 5.) Pipe connection for double pipe exhaust systems according to claim 1 to 4, characterized in that according to the Cross-connection area in the exhaust pipes, a cross-sectional constriction, preferably caused by a bead, is provided are. JL 2770 6.) Pipe connection for double pipe exhaust systems according to claim 1 to 5, characterized in that the cross connection is combined with a silencer, such that it is built into a flat resonator housing and in the area the cross-connection and in the areas of the two adjacent exhaust pipes within the resonator housing that follow it Perforations are provided.