Patent · US Active

Aftertreatment system having two SCR catalysts

US8997461B2 · kind B2 · utility

8Cited by
17References
33Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 25, 2012
Grant dateApr 7, 2015
Priority date—
Expiry dateJan 25, 2033

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02T10/40
  • WIPO fieldEnvironmental technology
  • WIPO sectorChemistry

Abstract

A system and method includes an internal combustion engine capable of producing an exhaust stream and an aftertreatment system operationally coupled to the exhaust stream. The aftertreatment system includes an upstream selective reduction catalyst (SCR) component and a downstream SCR component that are positioned in substantially different thermal environments. The upstream and downstream SCR components are sized to fully treat the entire exhaust stream at a low temperature highest NOx conversion condition, and the downstream SCR component is sized to fully treat the entire exhaust stream at a high temperature highest NOx conversion condition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.