Control device for regulating the exhaust gas recycling rate in an internal combustion engine with self-ignition

US4531499A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Konrad Eckert · Stuttgart, DE
• Wolfgang Ripper · Stuttgart, DE
• Wolf Wessel · Oberriexingen, DE

Key dates

• Filing date: Jul 23, 1982
• Grant date: Jul 30, 1985
• Expiry date: Jul 23, 2002

Classification

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

Abstract

A control device is proposed for regulating the exhaust gas recycling rate in an internal combustion engine with self-ignition in which combustion pressure signals are adjusted directly or indirectly to nominal values dependent on operating characteristics of the engine. In one particular embodiment the combustion pressure signal is differentiated and the frequency of certain occurring amplitude values is adjusted to a nominal value. Owing to the integration of specific combustion processes into the regulation, the device is capable of operating with relatively high precision. It is particularly well suited to compensate for drift phenomena.