Compensated semiconductor ignition system for internal combustion engines

US3960129A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Walter Hofer
• Georg Haubner · Starnberg, DE
• Peter Schmaldienst

Key dates

• Filing date: Feb 3, 1975
• Grant date: Jun 1, 1976
• Expiry date: Feb 3, 1995

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P1/086
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

To prevent spurious responses of a semiconductor switching element used in triggered magneto-type semiconductor ignition-switching systems, primarily due to noise signals introduced by the magneto, the control circuit for the ignition system includes a common, parallel connected R/C compensation circuit, connected through decoupling diodes to the ignition trigger pulse sources for the respective cylinders and the grounded main terminal of the switching element to supply a compensating voltage which suppresses noise voltages which increases with increasing speed of the internal combustion engine and thus dynamically compensates for generated noise pulses.