Patent · US Expired

Method and apparatus for determining and controlling the exhaust gas recirculation rate in internal combustion engines

US4462376A · kind A · utility

24Cited by

4References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Ripper · Stuttgart, DE
Max Straubel · Stuttgart, DE
Wolf Wessel · Oberriexingen, DE

Key dates

Filing date	Sep 29, 1982
Grant date	Jul 31, 1984
Priority date	—
Expiry date	Sep 29, 2002

Classification

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

Abstract

A method and an apparatus are proposed for determining and controlling an exhaust gas recirculation rate in internal combustion engines (Diesel engines), wherein an adjusting member in the exhaust gas recirculation line is adjusted by a regulator in order to attain precise regulation of the exhaust gas quantity recirculated to the aspirated air zone. The regulator is supplied with the exhaust gas temperature (T4) measured at a given time as the load signal for the engine. The comparison value of the regulator is then either an actual value of the exhaust gas recirculation rate, ascertained by means of effective temperature measurements in the intake zone of the engine, or a set-point differential temperature which is produced by means of measuring the aspirated air quantity at a given time and the rpm.

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