Controlled ignition system for an internal combustion engine to provide, selectively, one or more ignition pulses for any ignition event

US4112890A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hansjorg Manger · Schwieberdingen, DE
• Gerhard Sohner · Schorndorf, DE
• Gerd Hohne · Ludwigsburg, DE

Key dates

• Filing date: Mar 11, 1977
• Grant date: Sep 12, 1978
• Expiry date: Mar 11, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P15/10
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

To provide a first accurately timed ignition impulse for any one ignition event, and then, selectively, one or more ignition pulses, in accordance with sensed or existing operating parameters of the engine, a first ignition pulse is generated, accurately, in accordance with timing as determined by an ignition timing stage; a frequency generator is selectively enabled upon the presence or absence of operating parameters at certain values to provide sequential ignition pulses after the first, accurately timed ignition pulse has been provided.