Patent ID: 8024108
Filing Date: 2011-09-20
Classification: F01N,Y02T

Abstract:
1. A device for monitoring the secondary air system of a multi-cylinder internal combustion engine by means of which secondary air is introduced into the exhaust gas of the internal combustion engine, wherein the internal combustion engine has at least two cylinder banks, to each of which a specific number of cylinders of the internal combustion engine are assigned and each individual cylinder bank has a separate exhaust gas duct, a compressing means is provided that conveys secondary air and introduces the secondary air into the respective exhaust gas ducts by way of a number of individual secondary air lines corresponding to the number of exhaust gas ducts, and comprising: in each case a flow control means controllable independently of each other by means of signals of a control device in each of the individual secondary air lines for the purpose of introducing secondary air mass flows on an individual cylinder bank basis, an air mass meter from the signal of which a value is determined for the total secondary air mass flow that is introduced into the exhaust gas ducts, wherein the control device is operable