CS205472B1 - Exhaust silencer of internal combustion engines - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to an exhaust muffler for internal combustion engines comprising a beach and an intermediate silencer.

Exhaust silencers of internal combustion engines are known in which a muffler composed of bolting, welding or otherwise joining a plurality of metal and non-metal parts is inserted into the exhaust jacket. One solution is known in which the damping insert is formed from a plurality of sequential parts.

The disadvantages of the previously known designs are their cost and manufacturing complexity. In the case of metal parts shock absorbers, additional noise components are generated due to resonances.

These disadvantages are overcome by a device according to the invention, characterized in that the silencer insert is divided into two parts by a plane passing through the exhaust silencer axis and forms a closed internal proetor connected by openings in the front bottom with the exhaust pipe and through openings in the rear bottom with an external atmosphere. the inner space of the damper insert is divided by perforated partitions into two or more separate spaces. The interconnection of adjacent separate spaces of the inner space of the damping insert is channels, the walls of which are formed by the damper sheath and a longitudinal rib.

An advantage of the device according to the invention is the possibility of using a non-metallic refractory material on

205 472

20S 472 silencer insert production · the simplest way of manufacturing. The damping insert is so simple that it can be an event. made of two castings of light metal alloys barefoot casting equipment. A simple teohnologle production gives the possibility to use an optimal number of baffles 1 of the method of its interconnection, i.e. not only by conventional openings, but 1 ear canals of the most advantageous distance.

An exemplary embodiment of the invention is shown in the accompanying drawing, which is a perspective cross-section of the muffler. The exhaust pipe 10 is connected to the muffler shell 2. system. Inside the beach of the silencer 2 there are two silencer liner parts J which are upright and are connected in a split plane extending through the exhaust silencer axis 6. In the parts 2, the front bottom 2 is formed by an aperture 2 and the rear bottom 2 with a through opening 2. Further, the perforated partition 10 is formed. Some passages 11 of the perforated partition 10 are formed as channels 12, the walls of which are formed. The parts 2 are fastened to the damper casing 2 in an unmarked manner known per se.

With the engine firing, the gases pass through the exhaust pipe J into the interior of the silencer element 2, and with multiple reflection the noise before the gas outlet is effectively attenuated through the through hole 2 into the free atmosphere.

Claims (2)

An internal silencer of an internal combustion engine comprising a casing and an intermediate silencer, characterized in that the silencer is divided by a plane passing through the silencer axis (4) into two screens (3) and forms an enclosed interior interconnected with openings (6) in the front bottom (5). ) and an exhaust pipe (1) and through holes (9) in the rear bottom (8) with an external atmosphere, the interior of the silencer being divided by perforated partitions (10) into at least two separate spaces. Exhaust silencer according to claim 1, characterized in that the interconnections of adjacent separate spaces of the silencer liner are provided by channels (12), the walls of which are formed by the silencer liner (7) and the longitudinal rib (13).