Method and device for ascertaining a correction value for a fuel injection quantity

US10378474B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Achim Hirchenhein · Trier, DE
• Alexander Schenck Zuschweinsberg · Heubach, DE
• Klaus Joos · Walheim, DE
• Michael Bauer · Unterföhring, DE
• Werner Hess · Stuttgart, DE

Key dates

• Filing date: Mar 8, 2016
• Grant date: Aug 13, 2019
• Expiry date: Mar 8, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/247
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for ascertaining a correction value for a fuel metering of a fuel injector of an internal combustion engine, in which fuel is injected from a high pressure accumulator into a combustion chamber with the aid of the fuel injector, a value which is representative for a static flow rate through the fuel injector being ascertained by way of ascertaining, during at least one injection process of the fuel injector, a ratio of a pressure difference occurring in the high pressure accumulator as a result of the injection process and an associated duration which is characteristic for the injection process, and the correction value being ascertained on the basis of a comparison of the representative value with a comparative value.