Patent · US Expired

Apparatus for regulating the idling speed of internal combustion engines

US4513711A · kind A · utility

13Cited by

6References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gunter Braun · Freiberg, DE
Alfred Kratt · Schwieberdingen, DE
Rolf Schleicher · Leinfelden, DE

Key dates

Filing date	Aug 19, 1983
Grant date	Apr 30, 1985
Priority date	—
Expiry date	Aug 19, 2003

Classification

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

Abstract

In a system for regulation of the idling speed of an internal combustion engine acting through an electrical positioning means for the minimum-opening position of the throttle valve, the building-up of troublesome fluctuations in engine speed as the result of the characteristics of the regulation loop is counteracted in response to detection of the rise of such fluctuations or of their imminence as the result of an excessively rich mixture (on the basis of the signal from a probe in the exhaust pipe). When such a condition is detected, the amplification factors in the controller stage of the regulation loop are reduced, the reference desired idling speed value is raised and the lower limit of the regulation range is also raised. These parameters are returned to normal when the throttle valve moves away from its idling speed position.

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