Patent · US Expired

Electronic control apparatus with defined reset function

US4888697A · kind A · utility

8Cited by

7References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hermann Hemminger · Markgröningen, DE
Eugen Joos · Freiberg, DE
Werner Jundt · Ludwigsburg, DE
Peter Werner · Wiernsheim, DE

Key dates

Filing date	Oct 1, 1987
Grant date	Dec 19, 1989
Priority date	—
Expiry date	Oct 1, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG06F1/24
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An apparatus for resetting computing devices, particularly devices for fuel proportioning or fuel injection, for adjusting ignition timing, and the like, which are controlled by microprocessors, includes a resetting circuit to evaluate the change in the switching state of the ignition lock switch of the motor vehicle when restarted. The evaluation is effected independently of the supply voltage still at the computing device due to a self-sustaining circuit, by means of an integrated differentiation and the differentiation voltage is fed to a comparator at whose output the reset pulse is formed.

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