Method and apparatus for fuel injection control

US4084552A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ulrich Drews · Schwieberdingen, DE
• Peter Werner · Wiernsheim, DE
• Lothar Winkelmann · Ludwigsburg, DE

Key dates

• Filing date: Jul 6, 1976
• Grant date: Apr 18, 1978
• Expiry date: Jul 6, 1996

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/182
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A control pulse generator for the fuel injection system of internal combustion engines. The rpm-dependent trigger signal is applied simultaneously to two multivibrators one of which generates pulses whose length is determined by engine parameters while the other generates pulses of fixed length. A logical circuit selects the longer of these pulses so that the fuel control pulse will always have at least a minimum length.