Patent · US Expired

Device for suppressing undesired ignitions in a spark ignition engine

US6257216A · kind A · utility

8Cited by

8References

3Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Ralf Förster · Regensburg, DE
Alfons Fisch · Rockenhausen, DE

Key dates

Filing date	Mar 23, 2000
Grant date	Jul 10, 2001
Priority date	—
Expiry date	Mar 23, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02P3/0435
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The primary winding of an ignition coil is connected in series with an ignition switch that can be switched by a control circuit. A circuit including a capacitor, a resistor, and a diode is configured between the control terminal and the collector of the ignition switch. When the primary current is switched on, the capacitor discharge brings about a voltage reduction at the base of the ignition switch resulting in slowing down the trailing voltage edge at the collector of the ignition switch.

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