Fuel injection system

USRE31174E · kind E · reissue

Assignee

• Robert Bosch GmbH · DE

Inventors

• Harro Herth · Schwieberdingen, DE
• Bernd Kraus · Gerlingen, DE
• Wilfried Sautter
• Wolf Wessel · Oberriexingen, DE

Key dates

• Filing date: Sep 12, 1979
• Grant date: Mar 15, 1983
• Expiry date: Sep 12, 1999

Classification

• Technology area (CPC —): General

Abstract

A fuel injection system for an internal combustion engine includes electromagnetic injection valves controlled by a fuel control unit which receives signals from a camshaft actuated switch, a position-dependent throttle transducer and an oxygen sensor. When the oxygen sensor changes output levels, the transmission of this information is delayed, by the action of a switching transistor controlled by a monostable multivibrator, for a period of time equal to the internal time constant of the multivibrator.