Patent · US Active

Method and device for determining the oxygen storage capacity of an emission control system

US9309799B2 · kind B2 · utility

0Cited by

8References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Siyun Chu · Marbach am Neckar, DE
Matthias Kuentzle · Schwieberdingen, DE
Richard Holberg · Stuttgart, DE

Key dates

Filing date	Jan 27, 2014
Grant date	Apr 12, 2016
Priority date	—
Expiry date	Jan 27, 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 determining the oxygen storage capacity of an emission control system in an exhaust duct of an internal combustion engine. In a first phase, the internal combustion engine being operated using an air-fuel mixture having a rich air-to-fuel ratio, and in a second phase, the engine being operated at a lean air-to-fuel ratio; and an oxygen storage capacity of the emission control system being determined from an oxygen input into the emission control system during the second phase; and/or in order to determine a hydrocarbon gas storage capacity, the internal combustion engine being operated during the first phase at a lean air-to-fuel ratio, and operated in the second phase at a rich air-to-fuel ratio; and the hydrocarbon gas storage capacity being determined from the oxygen discharge from the emission control system during the second phase.

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