RU29964U1 - Exhaust silencer for an internal combustion engine (options) - Google Patents

Description

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INTERNAL COMBUSTION ENGINE EXHAUSER NOISE MUFFLER (OPTIONS)

The Nolvz model relates to internal combustion engines, namely to exhaust silencers installed in exhaust systems.

A device is known for reducing the noise of an exhaust of an internal combustion engine, comprising a cornea, divided by partitions into a series of chambers, an inlet and an outlet pipe, attached to the opposite end walls of the housing (RF patent No. 204283 6, FOINI / 02, published on 08.27.1995). The outlet pipe is made in the form of a diffuser, expanding in the direction from the housing.

This device does not provide the tonality of sound characteristic of sports cars with a low sound intensity.

Closest to the proposed is a well-known silencer of the exhaust exhaust of an internal combustion engine, comprising a housing with partitions suspended in it, an inlet cylindrical and an exhaust pipe attached to opposite end walls of the housing (RF patent No. 2056507, ROSH 1/08, publ. March 20, 1996) . The cavity of the housing is divided by partitions into the inlet, outlet and central chambers. The exhaust pipe is made in the form of a cone, tapering in the direction from the body.

Such a silencer also does not provide the tonality of sound characteristic of sports cars with a low sound power.

The proposed utility model solves the problem of achieving the tonality characteristic of sports automobiles with a low sound power. The specified technical result can be achieved in any of the proposed options for the design of the muffler.

According to the first embodiment, in the silencer of the exhaust exhaust of an internal combustion engine, the housing includes a housing with baffles placed in it, an inlet cylindrical and an exhaust pipe attached to opposite end walls of the housing, an exhaust pipe

made in the form of a direct cylinder with an inner diameter exceeding the inner diameter of the inlet pipe by 1.3 - 2.5 times, and the ratio of the length of the exhaust pipe to its internal diameter is at least 2.5.

An annular protrusion is formed in its cavity at the free end of the exhaust pipe.

The annular protrusion is made in the form of an end portion of its cylindrical wall bent inwardly into the outlet pipe.

According to the second embodiment, the silencer of the exhaust of an internal combustion engine, comprising a housing with baffles located therein, an inlet cylindrical and an exhaust pipe attached to opposite end walls of the housing, further comprises a cylindrical casing mounted relative to the exhaust pipe with an annular gap. The outer diameter of the casing is 1.3 to 2.5 times the inner diameter of the inlet pipe.

The outlet pipe may be perforated.

Examples of silencer design are shown in the drawings.

In FIG. 1 and 2 show the longitudinal and transverse sections of the muffler in the first example of design.

Figs. 3 and 4 show longitudinal and transverse sections of a silencer in a second embodiment.

In FIG. 5 and 6 show longitudinal and transverse sections of a silencer in a third embodiment.

Figures 7 and 8 show longitudinal and transverse sections of a silencer in a fourth embodiment.

In the first, second and fourth examples, the muffler contains a cylindrical body I with perforated inserts 2 and partitions 3 located therein. In the third example, the muffler contains an oval body 4 with perforated inserts 5 and partitions 6.

An inlet pipe 7 is attached to the front of the housings I and 4. An outlet pipe 8 is attached to the rear of the cylindrical housing 1, either an outlet pipe 9 or a perforated outlet pipe 10. The outlet pipes 8 and 9 are made in the form of a straight circular cylinder with an inner diameter exceeding the inner diameter of the inlet pipe 7 in 1.3 - 2.5 times.

An annular protrusion P is formed at the free end of the outflow pipe 9 in the form of a flange inside the outlet pipe 9 of the end part of its central wall. An exhaust pipe 12 is attached to the rear of the oval housing 4. A cylindrical casing 13 with an annular, air gap 14 is mounted on the upstream pipes 10 and 12.

The muffler works as follows.

The exhaust gases enter the housing I or 4 through the inlet pipe 7, pass through the perforated inserts 2 or 5 and through the baffles 3 or 6 and flow out through the exhaust pipes 8,9,10,12 with a low noise level. In the exhaust pipes 8,9,10,12, the nature of the flow of exhaust gases changes, as a result of which the tonality of the exhaust sound also changes and approaches the tonality of the exhaust sound of sports cars with its low power. The sound of such tonality has a beneficial effect on the driver, passengers and others.

Claims (5)

1. The silencer of the exhaust exhaust of an internal combustion engine, comprising a housing with baffles placed therein, a cylindrical inlet and exhaust nozzle attached to opposite end walls of the housing, characterized in that the exhaust nozzle is made in the form of a straight circular cylinder with an inner diameter greater than the inner diameter of the inlet the pipe is 1.3-2.5 times, and the ratio of the length of the exhaust pipe to its inner diameter is at least 2.5. 2. The muffler according to claim 1, characterized in that an annular protrusion is formed in its cavity at the free end of the exhaust pipe. 3. The muffler according to claim 2, characterized in that the annular protrusion is made in the form of an end portion of its cylindrical wall bent into the exhaust pipe. 4. The silencer of the exhaust exhaust of an internal combustion engine, comprising a housing with baffles placed therein, an inlet cylindrical and an exhaust pipe attached to opposite end walls of the housing, characterized in that it further comprises a cylindrical casing mounted relative to the exhaust pipe with an annular gap, wherein the external the diameter of the casing exceeds the inner diameter of the inlet pipe by 1.3-2.5 times. 5. The muffler according to claim 4, characterized in that the exhaust pipe is perforated.