DE741384C - Silencer for internal combustion engines in pipe form, in which the exhaust gases are deflected several times by 180í. - Google Patents

Description

Muffler for internal combustion engines in pipe form, in which the exhaust gases be deflected several times by 180 ° The invention relates to shaft damper for Internal combustion engines in which the exhaust gases are deflected several times by 180 ° and through the reversal of movement or direction, a part of what is in them Give up energy. Such silencers are already used to save space formed in tube shape. It is also known to use elongated gas ducts for mufflers to acoustic filters in the form of through openings in connection with them to join standing chambers.

The invention relates to a new design of a silencer, taking advantage of the reversal of movement of the gas guide: skan and of the filter chambers leads to a compact and simple design and thereby a Allows destruction of the sound waves in wide frequency ranges. According to the invention are in the case of a muffler in the shape of a pipe, in which the exhaust gases are deflected several times by 18o0 the ducts serving the gas line are provided as acoustic filters Chambers connected, these chambers in a tube surrounding the gas line housed and by radial transverse walls in the form of circular plates for Adaptation, dividing the chamber lengths to the noises to be muffled before assembly are.

Through this arrangement there is once the effect of energy dissipation through reversal of movement, the gases, on the other hand also the filter effect, the acoustic Filter and finally the damping effect by guiding the gases inside the Device of the silencer made serviceable, with also by .die on different Distances adjustable transverse walls a sound destruction in a wide frequency range is achieved.

Thanks to this design, the silencer can be used with very little material are made with relatively small dimensions.

The invention is illustrated by way of example in the accompanying drawing.

Fig. X shows a muffler in view and in longitudinal section, Fig. 2 in cross section, Fig. 3 illustrates the shape of the transverse walls of the exterior space, while Fig.q. to 6 explain various further embodiments. In the pipe a are .die partitions b, which converge radially in the middle. They divide the inside of the pipe into rooms I, II and III. The silk walls are tarnishing opposite ends not completely through or have corresponding passage openings, so that -the exhaust gases from inlet c through space I, passage d in and through the space II, the passage e into and through the space III and then through the exit opening f can flow out. Openings g lead in from the inner spaces I, II and III between the outside of the inner tube a and the inside of the outer tube h. located Annulus. This space is both by longitudinal walls b1 and by outer walls i divided into a large number of chambers, so-called damping chambers h.

In terms of manufacturing technology, a particularly simple solution is to assemble the inner tube from individual tube segments a1, a °, u3, which are connected to the partitions b1, b =, b3, either by netting or by welding. The transverse walls i expediently have an incision Z and are placed on the longitudinal walls b, which are likewise provided with a corresponding incision na. The whole thing can be held together by an outer tube.

Claims (1)

PATENT CLAIM: Silencers for internal combustion engines in pipe form, in which the exhaust gases are deflected several times by 180 °, characterized in that : the gas line (I, 1I, III) connected to chambers designed as acoustic filters and that these chambers are housed in a tube (h) surrounding the gas line and through radial transverse walls (i) in the form of plates in the shape of a circlet cutout Adaptation of the chamber lengths to the noises to be muffled before assembly are.