Pulse generator, particularly to provide ignition pulses for internal combustion engines

US4335700A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Hauler · Karlsruhe, DE
• Walter Hinke · Ludwigsburg, DE

Key dates

• Filing date: Feb 17, 1981
• Grant date: Jun 22, 1982
• Expiry date: Feb 17, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P7/0672
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

To simplify a Wiegand wire type pulse source, a Wiegand wire (4) has a coil (3) wound thereon. A permanent magnet (5) is positioned with a gap from the coil, and a magnetically permeable masking element, for example a sector-shaped disk, is movable between the magnet and the coil. The coil (3) is connected to a source of direct current (B) which so magnetizes the Wiegand wire (4) that, when a gap of the masking element occurs between the magnet (5) and the coil (3), the Wiegand wire is reversely magnetized until, again, a solid portion of the masking element is interposed in the gap between magnet (5) and coil (3) to restore the magnetic direction due to the battery (B). Re-magnetization pulses are picked off the coil (3) by a suitable pulse coupling element such as a capacitor (C).