Patent · US Active

Method for adjusting a fuel/air ratio of an internal combustion engine

US10794311B2 · kind B2 · utility

1Cited by

0References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Kersten Wehmeier · Ludwigsburg, DE
Michael Pfeil · South Charleston, US
Michael Fey · Wiernsheim, DE

Key dates

Filing date	Oct 26, 2017
Grant date	Oct 6, 2020
Priority date	—
Expiry date	Oct 26, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a method for adjusting a fuel/air ratio of an internal combustion engine (10), comprising a catalyst volume (26) with a first catalyst partial volume (26.1) and a second catalyst partial volume (26.2). The second catalyst partial volume (26.2) is arranged downstream from the first catalyst partial volume (26.1). An actual filling level of an exhaust gas constituent in the catalyst volume (26) is calculated from operating parameters of the internal combustion engine (10) and the exhaust system (14) using a computing model, and is adjusted to a nominal value by modifying the fuel/air ratio. The adjustment is carried out first for the second catalyst partial volume (26.2) and only later for the first catalyst partial volume (26.1).

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