Patent · US Active

System and method of purifying exhaust gas provided with lean NOx trap and selective catalytic reduction catalyst

US9551252B2 · kind B2 · utility

3Cited by

5References

20Claims

0Family size

Assignees

HYUNDAI MOTOR COMPANY · KR
FEV Group GmbH · DE

Inventors

Jin-Woo Park · Suwon-si, KR
Jin Ha Lee · Seoul, KR
Alexander Vovk · Aachen, DE
Joschka Schaub · Aachen, DE
Thomas Wittka · Hachenburg, DE

Key dates

Filing date	Dec 1, 2015
Grant date	Jan 24, 2017
Priority date	—
Expiry date	Dec 1, 2035

Classification

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

Abstract

A system for purifying an exhaust gas includes an engine, a lean NOx trap (LNT) mounted on the exhaust pipe, a dosing module mounted at the exhaust pipe downstream of the LNT, a selective catalytic reduction (SCR) catalyst mounted at the exhaust pipe downstream of the dosing module, and a controller for performing a denitrification (DeNOx) share between the LNT and the SCR catalyst according to a driving condition of the engine, wherein the controller predicts a NOx purifying ratio of the SCR catalyst according to the driving condition of the engine and adjusts a regeneration efficiency of the LNT based on an actual NOx purifying ratio of the SCR catalyst.

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