Electronic control system for internal combustion engines

US4432325A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerd Auracher · Beilstein, DE
• Albrecht Clement · Kornwestheim, DE
• Rolf Daumer · Laichingen, DE
• Helmut Schwarz · Tübingen, DE
• Thomas Theml · Leinfelden, DE
• Wilfried Venzke · Asperg, DE
• Gustav Virgilio · Winnenden, DE
• Bernhard Weichel · Stuttgart, DE
• Thomas Wilfert · Ludwigsburg, DE

Key dates

• Filing date: Nov 6, 1981
• Grant date: Feb 21, 1984
• Expiry date: Nov 6, 2001

Classification

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

Abstract

An electronic control system for internal combustion engines which has signal generator circuits for the fuel metering and for the ignition. During starting, especially in the case of cold starting, three different phases are provided for controlling the injected fuel quantity and for regulating the fuel quantity downward; furthermore, the ignition angle is adjusted in accordance with temperature and rpm. In terms of the fuel metering, the boundary between the first and second phase is dependent on the rpm or on a maximum total number of revolution cycles, and the end of the second phase is predetermined by a minimum metering signal which is dependent on temperature. In the ignition system, there is an increasing adjustment toward "early" approximately in the rpm range between 200 and 600 revolutions per minute as well as an increasing adjustment toward "late" as the temperature increases.