Patent · US Active

Method for operating a motor vehicle diesel engine

US9157356B2 · kind B2 · utility

5Cited by

9References

19Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Ortwin Balthes · Sachsenheim, DE
Thomas Beckmann · Chapel Hill, US
Berthold Keppeler · Owen, DE
Siegfried Mueller · Großingersheim, DE

Key dates

Filing date	Dec 9, 2011
Grant date	Oct 13, 2015
Priority date	—
Expiry date	Jan 3, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for operating a motor vehicle diesel engine having an exhaust emission control system is provided. The emission control system includes an oxidation catalytic converter, a particle filter, and an SCR catalytic converter, in which the exhaust gas that is discharged from the diesel engine is passed through the oxidation catalytic converter before passing through the particle filter and the SCR catalytic converter. A regeneration of the particle filter with thermal soot burn-off is occasionally carried out, during which the diesel engine is operated at an air-fuel ratio having a lambda value (λ) of at least approximately 1.0, and air is added to the exhaust gas after it exits the oxidation catalytic converter and before it enters the particle filter air, so that soot deposited on the particle filter is burnt-off.

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