18793326. EXHAUST GAS PURIFICATION CATALYST (TOYOTA JIDOSHA KABUSHIKI KAISHA)

EXHAUST GAS PURIFICATION CATALYST

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Takahiro Nishio of Nagoya-shi (JP)

Takumi Tojo of Tajimi-shi (JP)

Nobuyuki Takagi of Toyota-shi (JP)

Sho Hoshino of Hamamatsu-shi (JP)

Naoto Fujita of Hamamatsu-shi (JP)

Yosuke Toda of Iwata-shi (JP)

Shun Sakamoto of Iwata-shi (JP)

Kengo Shimizu of Iwata-shi (JP)

EXHAUST GAS PURIFICATION CATALYST

This abstract first appeared for US patent application 18793326 titled 'EXHAUST GAS PURIFICATION CATALYST

Original Abstract Submitted

An exhaust gas purification catalyst includes a substrate and a catalyst layer on the substrate. The catalyst layer includes lower and upper catalyst layers. The lower catalyst layer includes a powder material containing a powdered carrier, and catalyst metal particles containing Rh on the carrier. The upper catalyst layer includes an upstream catalyst layer in an upstream side in an exhaust gas flow direction, and a downstream catalyst layer in a downstream side in the exhaust gas flow direction. At least the upstream catalyst layer of the upstream and downstream catalyst layers includes a powder material containing a powdered carrier, and catalyst metal particles containing Pd on the carrier. A cumulative 50% particle size Din a volume-based particle size distribution of the powder material included in at least the upstream catalyst layer of the upstream and downstream catalyst layers is 6 μm or more and 10 μm or less.