Flux control system for a hall generator in an ignition system of an internal combustion engine

US4275703A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Bernd Bodig · Leinfelden, DE
• Herman Roozenbeek · Schwieberdingen, DE
• Werner Jundt · Ludwigsburg, DE

Key dates

• Filing date: Aug 24, 1979
• Grant date: Jun 30, 1981
• Expiry date: Aug 24, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S310/03
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The AC signal generator furnishing the basic control signal for ignition timing is a Hall generator the flux through which is gradually increased while the crankshaft of the engine rotates through a predetermined angle of rotation. The Hall generator is part of a magnetic circuit which also includes an air gap. The change in flux is accomplished by rotating a tapered magnetically conductive member through the air gap. The output of the Hall generator is applied through a linear amplifier to a threshold circuit whose output controls an electronic interrupter switch connected in series with the ignition coil.