Patent · US Expired

Arrangement for adjusting an operating characteristic quantity of an internal combustion engine

US4909213A · kind A · utility

15Cited by

7References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Manfred Mezger · Markgröningen, DE
Guenther Plapp · Echterdingen, DE
Frank Rodefeld · Asperg, DE

Key dates

Filing date	Oct 4, 1988
Grant date	Mar 20, 1990
Priority date	—
Expiry date	Oct 4, 2008

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2011/102
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention is directed to an arrangement for adjusting an operating characteristic quantity of an internal combustion engine such as for the idle speed control with a redundant drive. Two windings of the drive are driven via two separate lines from two separate output stages. When a defect is detected via an electrical monitoring unit, a safety logic unit transfers the full operation for the drive of the throttle flap to the output stage and the winding corresponding thereto which are not affected by the defect. In this way, a noraml idle speed of the engine is assured even in the presence of a single defect.

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