Combined exhaust gas silencer

Combined exhaust gas noise silencer consisting of a system of hollow elements with a mutual housing (1) comprising a front face (3) of the silencer connected to the exhaust gas supply pipe (2) a rear face (17) of the silencer with an outlet (18) from the rear face of the silencer and chambers divided by transverse partitions, where the original inlet exhaust gas (İp) carrying a noise wave is divided into at least two flows:

• an exhaust gas flow (İz) carrying a shifted noise wave with delayed wave length, and an exhaust gas flow (İn) carrying a non-shifted noise wave, which are subsequently combined into a common exhaust gas flow (İs), where the system of hollow elements contains an inlet expansion chamber (5), connected to located between the front face (3) of the silencer and the inlet transverse partition (6), and the common outlet expansion and mixing chamber (16) located between the outlet transverse partition (15) and the rear face (17) of the silencer, wherein between the inlet transverse partition (6) and the outlet transverse partition (15) one or more inner expansion chambers (8) of the non-delayed flow are arranged in the direction of the noise wave passage, having an inlet opening (7) of the inner chamber in the inlet transverse partitions (6) and having inlet openings (19) of the common outlet expansion and mixing chamber (16) in the outlet transverse partition (15), and in parallel to that inner expansion chamber/s (8) of non-delayed flow 4n+2, inner expansion chambers (12, 14) of the delayed flow are arranged sequentially in the direction of the noise wave passage, with the inlet openings (7) of the inner chambers (12, 14) of the delayed flow in the transverse partitions (6, 13) on their inlet, where n is 0 or positive integer number, and where each of the inner expansion chamber (12, 14) of the delayed flow comprises a resonator tube (11), provided that the ratio of the length of each resonator tube (11) of the resonators (10(R1), 10(R2)) to the length of corresponding inner expansion chamber (12, 14) of the delayed flow lies in the interval of 0.3 to 0.8, and the ratio of the cross-section surface of each resonator tube (11) to the cross-section surface of the inner exhaust gas supply pipe (2) lies in the interval of 0.3 to 0.8, and the surface size of the inlet openings (7) of the inner chambers (12, 14, 8) in the transverse partitions (7, 13) is the same ±10% as the surface size of the cross-section of the resonator tube (11), and wherein the sum of the lengths of all sequentially arranged inner expansion chambers of the non-delayed exhaust gas flow is the same ±10% as the sum of all lengths of all sequentially arranged inner expansion chambers of delayed flows.