Patent · US Expired

Ignition device for internal combustion engines

US5301649A · kind A · utility

2Cited by

6References

10Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erwin Achleitner · Obertraubling, DE
Hellmut Freudenberg · Bad Abbach, DE
Manfred Wier · Wenzenbach, DE
Thomas Elbe · Hemau, DE

Key dates

Filing date	Dec 11, 1992
Grant date	Apr 12, 1994
Priority date	—
Expiry date	Dec 11, 2012

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02P17/10
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An ignition device for internal combustion engines includes an ignition coil with separate primary and secondary windings. A sensor is connected in a spark plug current circuit. A peak value of an ignition current for each ignition is stored in a peak value rectifier and is subsequently processed into a value of a closing duration of the primary circuit, which is maintained at a constant by a control value regulation, to compensate for deviations and soiling or age condition changes in the ignition circuit. The closing duration is ascertained cylinder-selectively below an engine rpm limit value, is ascertained above this limit value only for a predetermined cylinder and is used for all of the remaining cylinders.

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