Correction device for a fuel metering system in an internal combustion engine

US4426980A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hermann Eisele · Leinfelden, DE
• Gerhard Stumpp · Stuttgart, DE
• Wolf Wessel · Oberriexingen, DE
• Ulrich Flaig
• Fridolin Piwonka · Asperg, DE

Key dates

• Filing date: Mar 28, 1983
• Grant date: Jan 24, 1984
• Expiry date: Mar 28, 2003

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D43/00
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device is proposed for drift compensation in fuel metering systems, in which it is not the metered quantity as such which is controlled in closed-loop fashion, but rather only the position of a quantity-determining member. The object of the invention is to maintain or re-obtain the original association between the fuel quantity and the position signal of the quantity-determining member for the purpose of providing a correct indication of the load state existing at a particular time. The drift compensation is intended to be capable of being performed manually, semi-automatically, or automatically, in an additive and/or multiplicative manner. It can furthermore be realized via a preferably rpm-dependent characteristic curve. The various values may be ascertained, for instance, in connection with running-out and running-up tests.