DE1056421B - Silencer for internal combustion engines - Google Patents

Description

GERMAN

The present invention relates to a muffler for internal combustion engines, in the interior of the housing a sieve-like perforated, closed at the front sides, gas pipes filled with sound absorbing material and perforated ■ lengthways penetrated jacket is arranged and from the interior of which the outlet pipes extend.

Such mufflers for internal combustion engines are already known. These have become known The exhaust gases from all engine cylinders are routed together in the muffler in the muffler and muffled.

It has already been proposed for eight-cylinder engines that four cylinders each have a separate one Downstream silencers to improve engine performance with good silencing to reach. But here, too, the gases from four cylinders are passed through the silencer together guided.

On the other hand, exhaust collectors and exhaust nozzles have become known, but they do not take any measures Have sound absorption, in which the exhaust gases of the individual cylinders each through a special gas pipe can be fed into a common pipe.

It has also already become known in such devices that the cylinder outlet ports are assigned to them To let chambers flow. However, these are individual measures that are marked with a silencer Genus have nothing to do, but its substantial improvement with the present invention is strived for. In particular, the present invention is intended to take up a small space with an essential Increase in the performance of the engine and its tightening power compared to known silencers good sound absorption can be achieved.

The solution to this problem is essentially achieved in that each cylinder outlet port in is assigned its own gas guide tube in a manner known per se.

A further development is that each cylinder outlet port opens in a manner known per se into an associated chamber, from each of which the one cylinder outlet clip associated gas guide tube goes out.

A special feature is that the cylinder outlet port associated chambers in the same number are arranged on the end faces of the muffler housing.

Finally, there is another feature that the gas guide tubes up to the entry into the with Sound-absorbing material-filled jacket are closed.

Due to the separate discharge of the gases from the individual cylinders and the separate guidance Mufflers for internal combustion engines

Applicant: ^v
Josef Ernst,
Hagen (Westphalia), Yorckstr. 10

Josef Ernst, -Hagen. (Westf.),
has been named as the inventor

by the muffler according to the present invention With good sound absorption, there is a significant increase in performance and an increased tightening torque of the engine.

The nozzles on the engine cylinders for discharging the exhaust gases open into an assigned chamber, emerge from the individual pipes for guiding the gases through the sound absorbing substance.

The pipes are in the area where they absorb sound are surrounded, perforated like a sieve, so that the gases or their sound waves through the ^ The tube can penetrate the sound absorbent. The exit of the pipes from the sound absorbing material takes place advantageously in two chamber parts that are connected to each other so that the damped gases of the individual engine cylinders are brought together after the damping and jointly out of the exhaust port be expelled.

This merging of the gases after the damping allows a particularly advantageous design Design of the muffler by placing its jacket at a distance around the jacket that contains the sound-absorbing material enveloped, is arranged.

The jacket surrounding the sound absorbing material is perforated like a sieve, so that the heat can also be absorbed Sound absorbing material can escape freely and sucked off by the gases flowing out of the muffler will.

It is particularly advantageous to guide the individual pipes through the sound-absorbing material by half one side, so that on both sides of the sound absorbing substance behind the chambers in which the muffled Gases are merged into a number of chambers to accommodate the expelled from the cylinders Exhaust gases are arranged.

The idea of the invention is shown in the drawing, for example. It shows

909 508 / 216-

Fig. 1 a. Longitudinal middle section of the silencer, Fig. 2 the silencer after a section AB, Fig. 3 the silencer after a section CD, Fig. 4 the silencer after a section EF, Fig. 5 the silencer after a section GH. The muffler has a jacket 1, inlet connection 2 and outlet connection 3 in the usual manner.

■ The inlet connection 2 are connected to the cylinders of the internal combustion engine, not shown.

According to the present invention, the inlet nozzles 2 each open into a chamber 9, from each of which a pipe 4 for guiding the gases extends.

The tubes 4 are guided through sound absorbing substance 5 and open into a common chamber 6 has outlet nozzle 3.

In the embodiment shown, the sound absorbing material cushion 5 is centered in the muffler casing arranged and surrounded by a sieve-shaped jacket 7.

The ends of the jacket 7 are closed by end walls 8. In front of the end walls 8 are the chamber parts 6 a and 6 b, which are connected to one another by the annular space between the jacket 7 and the jacket 1.

On both sides of the chamber portions 6α and 6 b are two chambers 9 a and 9 b and 9 c and d disposed 9. , In the chamber 9 α opens the nozzle 2 a; the gases enter the chamber in the direction of the arrow and leave the chamber through the tube 4 α.

The tube leads through the chambers 9 b and 6 a, enters the sound absorbing substance 5 and leaves it by exiting into the chamber part 6 b.

The tube 4a is guided with its end to the front partition wall of the chamber part 6 b and b perforated like a sieve in the area of sound-absorbing material and in the area of the chamber part. 6

The gas is discharged in the> direction of the dashed line indicated arrows.

The pipe 4 b, into which the gases from the nozzle 2 & are passed through the chamber 9 b , lies parallel to the pipe 4 a, but only begins in the chamber 9 b.

The tubes 4c and 4d are guided in the same way. The gas curve is, however, opposite the tubes 4a and 4 & reversed, that is, c is the gas of pipes and 4 <£ occur in the chamber section 6 a of.

The tubes 4 c and 4 d, which run in the opposite direction as the tubes 4 α and 4 b , also have a closed jacket in the chambers 9 c and 6 b, in the area of the sound absorbing substance 5 and the chamber part 6 a, a screen-like perforated jacket .

Claims (4)

Patent claims: 1. Silencer for internal combustion engines, in the interior of the housing a sieve-like perforated, Gas ducts closed at the end, filled with sound absorbing material and perforated longitudinally penetrated jacket is arranged and from the interior of which the outlet pipes extend, characterized in that, that each cylinder outlet nozzle (2) has its own gas guide tube in a manner known per se (4) is assigned. 2. Silencer according to claim 1, characterized in that each cylinder outlet nozzle (2) opens in a manner known per se into an associated chamber (9), each of which is one Cylinder outlet connector (2) associated gas pipe (4) goes out. 3: Silencer according to claims 1 and 2, characterized in that the chambers (9) assigned to the cylinder outlet nozzles are arranged in the same number on the end faces of the silencer housing (1). 4. Silencer according to claims 1 to 3, characterized in that the gas guide tubes (4) up to the entry into the with sound absorbing material (5) filled jacket (7) are closed. Considered publications:
German Patent Nos. 305 111, 737 396;
French Patent No. / 782 076;
U.S. Patent No. 2,014,666. 1 sheet of drawings © 909 508/216 4.59