| abstract |
Subject of the invention is an exhaust gas purification system for a gasoline engine, comprising in consecutive order the following devices:n a first three-way-catalyst (TWC1), a gasoline particulate filter (GPF) and a second three-way-catalyst (TWC2), wherein the oxygen storage capacity (OSC) of the TWC2 is greater than the OSC of the GPF, wherein the OSC is determined in mg/l of the volume of the device. nn The invention also relates to methods in which the system is used and uses of the system. |