Patent ID: 11859526
Assignee: UMICORE AG & CO. KG
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 22:
23. An exhaust gas purification system for a gasoline engine, comprising in consecutive order the following devices:
a first three-way-catalyst (TWC1), a gasoline particulate filter (GPF) and a second three-way-catalyst (TWC2),
wherein a platinum-group metal concentration (PGM) of the GPF is at least 40% greater than a PGM of the TWC2, wherein the PGM is determined in g/ft3 of the volume of the device, and wherein a wash coat load (WCL) of the TWC2 is greater than a WCL of the GPF, wherein the WCL is determined in g/l of the volume of the device.