Patent · US Active

Method for adjusting the metered additions of reducing agent for selective catalytic reduction

US8191357B2 · kind B2 · utility

5Cited by

3References

11Claims

0Family size

Assignee

MAN Truck &Bus AG · DE

Inventors

Andreas Döring · Unterhaching, DE
Florian Walde · Dietenhofen, DE
Jochen Philipp · Uttenreuth, DE
Henry Munitzk · Heroldsberg, DE
Ralf Steinert · Koblenzer Straße, DE

Key dates

Filing date	Mar 8, 2010
Grant date	Jun 5, 2012
Priority date	—
Expiry date	Dec 11, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for use in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operating with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and, during the operation of the internal combustion engine, determines, by comparison of a value proportional to the nominal emission or the nominal conversion stored in the control unit of the internal combustion engine for the associated operating point of the internal combustion engine and/or of the exhaust gas post-treatment system with a value proportional to the actual emission or the actual conversion metrologically determined by the control unit.

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