Airflow meter with device for the separation of foreign particles

US7260986B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Thomas Lenzing · Memmingen, DE
• Klaus Reymann · Gerlingen, DE
• Uwe Konzelmann · Asperg, DE
• Torsten Schulz · Pinneberg, DE

Key dates

• Filing date: May 23, 2003
• Grant date: Aug 28, 2007
• Expiry date: Jul 11, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F15/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device is provided for determining at least one parameter of a medium flowing in a line in a main flow direction, e.g., a parameter of the intake air mass of an internal combustion engine. The device includes a part, which is inserted into the line at a predetermined alignment with respect to the main flow direction in such a way that a partial flow of the medium flowing in the line in the main flow direction flows through at least one measuring channel provided in the part in a first direction from an intake of the measuring channel to an outlet of the measuring channel. The device further includes a measuring element situated in the measuring channel for determining the at least one parameter. Between its intake and its outlet, the measuring channel features at least one channel segment in which a mechanism is located that causes flow vortices in this channel segment, whereby liquid droplets and solid particles are advantageously deposited on the inner wall of the channel before they can reach the measuring element.