RU33978U1 - Exhaust silencer - Google Patents

Description

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NOISE MUFFLER EXHAUST OF THE INTERNAL COMBUSTION ENGINE.

The polar model relates to mechanical engineering, in particular to engine building, namely to silencers of the exhaust noise of an internal combustion engine.

A well-known muffler for the exhaust of an internal combustion engine, registered by USSR copyright certificate No. 180075 (published on March 7, 1993 in the official bulletin of the Invention No. 9), comprising a housing with end walls, coaxial inlet and outlet pipes, the first and second transverse partitions dividing the housing into the intake, intermediate and exhaust chambers, and the inlet pipe in the area of the inlet chamber is perforated, and the exhaust pipe in the zone of the intermediate chamber is made with compensation holes.

Known silencer of the exhaust gas of an internal combustion engine, protected by RF patent No. 2172846 (published on August 27, 2001 in the official bulletin of the Invention. Utility models No. 24), comprising a cylindrical body with end walls, in which three chambers are formed through transverse partitions: entrance, central and output, coaxial inlet and outlet nozzles connected to the input and output chambers through perforated sections and free sections of which are located in the central one.

The closest analogue, known as the prototype of the claimed utility model, is a silencer for the exhaust noise of an internal combustion engine, for which utility application No. 2002109067 has been submitted (gfioriget dated 04/08/2002, decision to issue a utility model certificate dated 08/08/2002) containing housing with nq) eAHeE and rear end walls, two

transverse partitions dividing the body into three chambers: inlet, intermediate and exhaust, coaxial inlet and outlet perforated nozzles, the inner sections of which are located in the intermediate chamber, the inner section of the inlet pipe is made in the form of a confuser, and the inlet and outlet chambers are filled with sound-absorbing packing.

The task to which the claimed utility model is directed is to increase the efficiency of sound absorption.

The problem is solved due to the fact that the muffler has additional outlet and hfomizhugnyh patches, u) by which the intermediate pipe is coaxial to the inlet pipe and located in the output chamber, and the additional output pipe is located in the inlet chamber, the output pipes are located on both sides of the axis of the muffler and have u) opposite directions of exhaust emissions.

The figure 1 shows the silencer of the exhaust exhaust of an internal combustion engine - 1 fololny section.

The exhaust gas exhaust silencer of the internal combustion engine contains a housing 1 with front 2 and rear 3 end walls, in which three chambers are provided by transverse baffles 4: a discharge chamber 5; and an intermediate pipe 9, two exhaust pipes 10 and 11 located approximately relative to the axis of the stapler, while the exhaust pipe 10 is located in the resonant upstream chamber 7 and its output end passes through the rear end wall 3 vshusknoy pipe 11 is disposed in the resonant chamber inlet-vshusknoy 5

2

and its outlet end is peeled through the front end wall 2. The intermediate pipe 9 is located in the resonant exhaust chamber 7. The internal of all pipes are located in the intermediate separation chamber 6. Moreover, the internal section of the inlet pipe 8 is made tapering in the form of a confuser 12, the diameter d of which is a value equal to (0.7 - 0.88) of the diameter D of the inlet section of the pipe. Perforation was performed in the inlet 8, intermediate 9, and inlet 10 and 11 nozzle sections located, respectively, in the resonance zones of the inlet-outlet 5 and outlet 7 chambers. Resonant inlet 5 and outlet 7 of the chamber are filled with sound-absorbing packing, for example, basalt fiber.

The silencer of the exhaust exhaust of an internal combustion engine operates as follows.

The flow of exhaust gases from the engine through the inlet section of the inlet pipe 8 enters its perforated zone. Encountering on its way a resistance in the form of a confuser 12 at the end of the inlet pipe, part of the gas flow through the perforation holes enters the inlet-outlet 5, filled with noise-absorbing packing, where it expands, its speed drops, and passing sound-absorbing (packing, it is reflected multiple Reflecting from the walls of the inlet-outlet chamber, the gas stream partially enters through the perforation into the exhaust duct 5 ok 11 and into the atmosphere, and the other part of the gas stream through the perforation returns to the inlet noy pipe 8 and enters the expansion intermediate chamber 6. In the expansion intermediate chamber 6, part of the flow enters the coaxial inlet pipe of the intermediate pipe 9, and part of the flow expands in the chamber, and continues to lose speed.

of the intermediate expansion chamber, the gas note through the inner cuts nostun partly in the outlet pipe 11, partly in the outlet pipe 10, parted in the intermediate pipe 9 and through perforations into the corresponding resonance chambers, where it continues to expand and is repeatedly reflected from the elements from the elements of the sound-absorbing packing, it is inhibited , providing effective hygiene. Reflecting from the walls of the resonant inlet-outlet and upstream chambers, the gas flow through the non-perforation returns to the outlet pipes 10 and 11 and enters the atmosphere.

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Claims (1)

An exhaust silencer for an internal combustion engine comprising a housing with front and rear end walls, two transverse baffles dividing the housing into three chambers: resonant inlet-outlet and exhaust, filled with sound-absorbing packing, and an intermediate expansion, coaxial to the housing, inlet perforated pipe, the inner cut of which made tapering in the form of a confuser, an outlet perforated nozzle, while the inner sections of all nozzles are located in the intermediate expansion chamber, excellent characterized in that it has an intermediate perforated nozzle located in the resonant outlet chamber coaxially with the inlet nozzle and two outlet perforated nozzles arranged parallel to the axis of the muffler, while one outlet nozzle is located in the resonant outlet chamber and its outlet end passes through the rear end wall, and another outlet pipe is located in the resonant inlet-outlet chamber and its output end passes through the front end wall.