Patent ID: 6223527
Filing Date: 2001-05-01
Classification: F01N,F02D,F02M,Y02A,Y02T

Abstract:
An exhaust system for motor vehicles with an internal combustion engine, in which the exhaust gases are passed to the rear area of the motor vehicle via a catalytic converter, exhaust lines from the individual cylinders being combined on one side of the internal combustion engine into a collecting line, from which two feed lines of different lengths lead to the catalytic converter, and flow through the longer feed line is controlled by means of a valve, wherein at least one exhaust-gas recirculation line branches off from the longer feed line, with the feed lines (4, 5) having different cross sections, the feed line (4) with the larger cross section being arranged ahead of the internal combustion engine (1) in the forward direction of travel of the motor vehicle and below the internal combustion engine (1), having an arc-shaped region (6), from which the exhaust line (7) runs counter to the direction of travel to the catalytic converter (8), which is arranged underneath the passenger compartment, the feed line (5) with the smaller cross section providing a short connection between a region (12) of the collecting line (11) and a region (13) of the exhaust line (7) adjacent to the catalytic converter (8).