Control device for internal combustion engines

US5021959A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Werner Jundt · Ludwigsburg, DE
• Norbert Miller
• Rainer Sommer · Heroldsbach, DE

Key dates

• Filing date: Jul 26, 1989
• Grant date: Jun 4, 1991
• Expiry date: Jul 26, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/065
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a control device (14) for fuel injection and/or spark ignition in an internal combustion engine, a first datablock (16) is programmed for operation in accordance with engine operating parameters (BM, P, L, n, T) but without lambda control when the engine is cold and a second datablock (18) is programmed for operation with lambda control when the engine is warm. A switching logic (26) switches in the first datablock (16) when the engine is started below a lower threshold (T.sub.1) and switches over to the second datablock (18) when the temperature rises above a higher threshold (T.sub.2).