Patent · US Active

Method for operating a spark-ignition internal combustion engine with exhaust gas aftertreatment

US8833060B2 · kind B2 · utility

2Cited by

0References

7Claims

0Family size

Assignee

Ford Global Technologies, LLC · US

Inventors

Helmut Hans Ruhland · Eschweiler, DE
Moritz Klaus Springer · Hagen, DE
Brendan Patrick Carberry · Aachen, DE

Key dates

Filing date	Feb 22, 2012
Grant date	Sep 16, 2014
Priority date	—
Expiry date	Oct 6, 2032

Classification

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

Abstract

Embodiments for regenerating a particle filter are provided. In one example, a method includes operating a spark-ignition internal combustion engine having a particle filter for collecting and burning soot particles in exhaust gas comprises in order to initiate regeneration of the particle filter. The method may include, in response to a regeneration condition, increasing exhaust temperature by retarding spark timing and once regeneration is reached, operating the engine with lean combustion to regenerate the particle filter, where a degree of leanness is based on each of a state of the filter and an upstream three-way catalyst.

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