Patent ID: 11865497
Assignee: BASF SE
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 18:
19. A method of making emission treatment system for a gasoline direct injection engine, the method comprising: positioning a three-way conversion (TWC) composite comprising a first TWC catalytic material on a flow-through substrate downstream of the gasoline direct injection engine; and positioning the catalyzed particulate filter downstream of the TWC composite, wherein the catalyzed particulate filter comprises a second three-way conversion (TWC) catalytic material permeating walls of a particulate filter, the particulate filter having a wall thickness ranging from 6 mils (152 μm) to 14 mils (356 μm) and a porosity in a range of from 55% to 70%; and wherein the second TWC catalytic material comprises rhodium as the only platinum group metal.