Patent · US Active

Method of operating an exhaust gas aftertreatment

US9890684B2 · kind B2 · utility

0Cited by

8References

19Claims

0Family size

Assignee

MTU FRIEDRICHSHAFEN GMBH · DE

Inventors

Andrea Prospero · Tettnang, DE
Tim Späder · Tettnang, DE
Stefan MERK · Ottobeuren, DE

Key dates

Filing date	Jun 3, 2014
Grant date	Feb 13, 2018
Priority date	—
Expiry date	Jul 16, 2034

Classification

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

Abstract

A method and a device for operating an exhaust gas aftertreatment, wherein a diesel particulate filter is regenerated during the operation, in particular passively regenerated, wherein a corrected differential pressure is calculated from a current differential pressure across the diesel particulate filter at a current exhaust gas volumetric flow rate and with a current correction factor. The current correction factor is determined by determining a lower differential pressure in a predetermined time interval at a defined exhaust gas volumetric flow rate, in particular in a specified exhaust gas volumetric flow rate interval around the defined exhaust gas volumetric flow rate, and comparing the lower differential pressure with a specified current reference value and, depending thereon, calculating a new correction factor or retaining the previous correction factor as the current correction factor.

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