Method for determining the fluid level of a tank in motor vehicles

US6666084B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Schelhas · Stuttgart, DE
• Klaus Marx · Stuttgart, DE
• Hans-Peter Braun · Sulz am Neckar, DE
• Stefan Muelders · Rutesheim, DE

Key dates

• Filing date: Mar 13, 2002
• Grant date: Dec 23, 2003
• Expiry date: Mar 13, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F9/008
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining the instantaneous fluid level of a tank includes the steps of: designating a beginning fluid-level of the tank as an input value during the starting of the engine; ascertaining a first fluid-level value from a fluid level measured by a fluid-level measuring device, and ascertaining a second fluid-level value and a window around the second fluid-level value from the consumption of the engine and from the input value; comparing the first fluid-level value to the window around the second fluid-level value; determining whether the first or the second fluid-level value should be a new input value; displaying the new input value as the fluid level; and terminating the method if the engine is switched off or repeating the method starting from the ascertaining step when the engine is running.