FIELD: engine technology.
SUBSTANCE: catalytic device located close to the engine exhaust manifold and its application in the exhaust system for internal combustion engines are disclosed. A paired catalytic device for exhaust gas purification containing: an upstream substrate and a downstream substrate, wherein the upstream substrate is spatially separated from the downstream substrate, while the upstream substrate contains the first composition of a three-way catalyst (TWC), and the downstream substrate contains the second TWC composition, wherein each of the first and second TWC compositions contains an oxygen storage component (OSC), moreover, the loading of the OSC in the downstream substrate is greater than the loading of the OSC in the upstream substrate and is at least 2.2 g/in3.
EFFECT: expansion of the range of catalytic devices.
19 cl, 2 dwg
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