Process for controlling knocking in internal combustion engines

US5243942A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Robert Entenmann · Memmingen, DE
• Stefan Unland · Schwieberdingen, DE
• Werner Haeming · Neudenau, DE

Key dates

• Filing date: Jun 11, 1992
• Grant date: Sep 14, 1993
• Expiry date: Jun 11, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A process for controlling knocking of an internal combustion engine comprises the steps of retarding an ignition angle when a cylinder knocks, resetting the ignition angle by adjusting in the direction of "advance", storing prevailing ignition angle retardation values in an adaptation characteristic diagram which, depending on a size of operating parameters of the internal combustion engine, has subdivided ranges, with one value of an ignition angle retardation determined during operation in an appropriate range and particularly on leaving this range, always being stored, setting the value of the ignition angle retardation as stored for a particular range on changing into this range, and on changing the range, resetting the ignition angle with increased advance adjustment speed until knocking occurs in this range or until a predetermined value of the ignition angle is reached.