Patent ID: 6880328

Claim:
An exhaust system of a multi-cylinder internal combustion engine, comprising: at least one first gas sensor arranged in the exhaust system sensitive to at least one component of exhaust gas, the first gas sensor configured to determine an air/fuel ratio supplied to the internal combustion engine; a regulation device configured to regulate the air/fuel ratio as a function of a signal supplied by the gas sensor, the regulation device including a regulator configured to receive the signal from the first gas sensor and configured to store an algorithm for cylinder-selective determination and regulation of the air/fuel ratio; and at least one first catalytic converter arranged in the exhaust system in a position of the exhaust system close to the internal combustion engine upstream from the first gas sensor in a direction of flow of the exhaust gas of the internal combustion engine; wherein the first catalytic converter is arranged in one of a manifold and a preliminary pipe of the exhaust system into which the cylinders of the internal combustion engine open, and where the at least one first catalytic converter includes a plurality of first catalytic converters having a small volume, a first small-volume first catalytic converter arranged in each manifold pipe of the manifold.