Adaptive fuel/air mixture adjustment for taking fuel characteristics into consideration

US5121732A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Nikolaus Benninger · Lambach, DE
• Wolfgang Boerkel · Memmingen, DE
• Stefan Miller · Regensburg, DE
• Guenther Plapp · Echterdingen, DE

Key dates

• Filing date: Jun 3, 1991
• Grant date: Jun 16, 1992
• Expiry date: Jun 3, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/30
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In methods for adaptively adjusting a fuel/air mixture, the adaptation factor is rapidly adjusted to take fuel characteristics into account when it develops that after tanking, poor control results are obtained with the adaptation factor previously applicable. As soon as there is an adjustment again to good control results, the conventional relatively slow adaptation is carried out. These methods afford the advantage that they can be carried out without special expensive mixture sensors.