Combined exhaust gas silencer

A combined exhaust gas noise silencer consisting of a system of hollow elements within a mutual housing (1) comprising:

• a front face (3) and a rear face (17);
• an exhaust gas supply pipe (2) connected to the front face (3), and an outlet (18) on the rear face (17);
• the system of hollow elements are divided by transverse partitions disposed between the front face (3) and the rear face (17);
• wherein an inlet gas flow (İp) carrying a noise wave is divided into two flow paths:
• a shifted noise wave flow path (İz) with a delayed wave length and a non-shifted noise wave flow path (İn) with a non-delayed wave length, wherein both the shifted noise wave flow path (İz) and the non-shifted noise wave flow path (İn) are subsequently combined into a common flow path (İs) prior to exit through the outlet (18),
• wherein the system of hollow elements further contains an inlet expansion chamber (5) delimited by the front face (3) and an inlet transverse partition (6),
• a common outlet expansion and mixing chamber (16) delimited by an outlet transverse partition (15) and the rear face (17),
• wherein the non-shifted noise wave flow path (İn) includes a first inner expansion chamber (8) formed between the inlet transverse partition (6) and the outlet transverse partition (15),
• wherein the first inner expansion chamber (8) includes a first inlet opening (7) formed in the inlet transverse partition (6) and a second inlet opening (19) formed in the outlet transverse partition (15) that connects the first inner expansion chamber to the inlet expansion chamber (5) and the common outlet expansion and mixing chamber (16), respectively,
• wherein the shifted noise wave flow path (İz) includes 4n+2 second inner expansion chambers (12, 14), parallel to the first inner expansion chamber (8) of the non-shifted noise wave flow path (İn), and separated by a mid-transverse partition (13) disposed between the inlet and the outlet transverse partitions (6, 15), wherein n is equal to zero or a positive integer,
• a third inlet opening (7′), formed in the inlet transverse partition (6) to connect the inlet expansion chamber (5) to the second inner expansion chambers (12,14),
• a fourth inlet opening (7″), formed in the mid-transverse partition (13) to connect the second inner expansion chambers (12, 14)
• a fifth inlet opening (19′) formed in the outlet transverse partition (15) that connects the second inner expansion chambers (12, 14) to the common outlet expansion and mixing chamber (16), and
• resonator tubes (11) extending from each of the third and fourth inlet openings (7′, 7″) in the direction of the inlet gas flow into each of the second inner expansion chambers (12, 14), wherein a ratio of a length of each resonator tube (11) to a length of the corresponding second inner expansion chamber (12, 14) of the shifted noise wave flow path (İz) lies in a range of 0.3 to 0.8 and a ratio of a cross-sectional area of each resonator tube (11) to the cross-sectional area of the exhaust gas supply pipe (2) lies in a range of 0,3 to 0.8 and a cross-sectional area of the inlet openings (7, 7′, 7″) of the transverse partitions (6, 13) is within 10% of the cross-sectional area of the resonator tubes (11) and wherein the length of the first expansion chamber (8) of the non-shifted noise wave flow path (İn) is within 10% of the sum of all lengths of the second inner expansion chambers arranged sequentially.