Starting control for fuel injection systems

US4770135A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rudiger Jautelat · Tamm, DE
• Rolf Kohler · Schwieberdingen, DE
• Gunther Plapp · Echterdingen, DE
• Botho Zichner · Schwieberdingen, DE

Key dates

• Filing date: Jun 25, 1987
• Grant date: Sep 13, 1988
• Expiry date: Jun 25, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/061
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A starting control for fuel injection systems of internal combustion engines is suggested in which an injection time (te.sub.VER), which is dependent on the engine starting temperature (T.sub.MS), is determined in the starting phase. In the starting phase, this injection time (te.sub.VER) follows the curve of special starting characteristic lines. A continuous transition to performance characteristics injection time (te.sub.KF) is effected by means of a comparator. A smooth transition from the starting phase to normal operation is obtained in this way.