Patent · US Expired

Electronically controlled ignition system

US4509482A · kind A · utility

1Cited by

4References

17Claims

0Family size

Assignees

Telefunken Electronic GmbH · DE
Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Willy Minner · Schwaigern, DE
Alfred Krappel · Ismaning, DE
Johannes Guggenmos · Dirlewang, DE

Key dates

Filing date	Sep 2, 1982
Grant date	Apr 9, 1985
Priority date	—
Expiry date	Sep 2, 2002

Classification

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

Abstract

The invention relates to an electronically controlled ignition system in which a correction signal is obtained from a control signal derived directly from an ignition pulse sensor. The invention consists of producing a saw-tooth signal with a rising flank and a falling flank within one cycle of the square wave control signal, using only one flank of the said control signal. The ratio or relationship between the gradients of the two flanks is a measure of the change in the corrected signal relative to the control signal. The electronically controlled ignition system is particularly suitable for compensating for the ignition advance, caused by an induction sensor, as compared to the mechanical position of the rotor at low engine speeds.

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