Double-flow exhaust system for combustion engine in motor car, has delay device designed to produce running time difference of exhaust gas when exhaust gas of engine flows between exhaust lines through system

摘要

#CMT# #/CMT# The system (1) has first and second exhaust lines (3, 4) fluidically and operatively connected with each other by a connection section (17). The second exhaust line differs from the first exhaust line and comprises an equaled tube length as the first exhaust line. One of the exhaust lines has a delay device (20) i.e. interference damper, arranged downstream to the connection section and designed to produce a running time difference of exhaust gas when exhaust gas of a combustion engine (2) flows between the exhaust lines through the system. #CMT#USE : #/CMT# Double-flow exhaust system for a combustion engine in a motor car (all claimed). #CMT#ADVANTAGE : #/CMT# The delay device is arranged downstream to the connection section of the exhaust lines and designed to produce running time difference of the exhaust gas when the exhaust gas of the combustion engine flows between the exhaust lines through the system, thus preventing that excitation pulses of the engine emerge at the same time from the exhaust lines without requiring a coil, and hence reducing noise of the motor car in critical speed ranges of the engine while reducing installation space requirement of the system. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a partial sectional view of a double-flow exhaust system for a combustion engine of a motor car. 1 : Exhaust system 2 : Combustion engine 3, 4 : Exhaust lines 17 : Connection section 20 : Delay device.