Patent · US Expired

Reducing noxious components from the exhaust gases of internal combustion engines

US3973529A · kind A · utility

31Cited by

7References

23Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolf Wessel · Oberriexingen, DE
Rudolf Schwammle
Hans Schnurle · Walheim, DE
Heinrich Knapp · Leonberg, DE

Key dates

Filing date	Jun 18, 1974
Grant date	Aug 10, 1976
Priority date	—
Expiry date	Jun 18, 1994

Classification

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

Abstract

Control systems in which transition between oxidizing and reducing state of the exhaust gases is sensed, and the input to the engine modified in accordance with sensed exhaust gas composition utilize a sensor which has an output signal having a transition jump, the extent of the jump being highly temperature dependent; in accordance with the invention, a signal is derived representative of change in level of the transition jump, as a function of temperature, and the control circuit responsive to the transition jump, and controlling input to the engine is modified in accordance with the signal repesentative of level change of the transition jump, to compensate for temperature-dependent changes.

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