Protective grating for a mass flow rate sensor in a channel of suctioned air

US6634226B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Herbert Roeckel · Ditzingen, DE
• Heinz Rilling · Eberdingen, DE
• Thomas Lenzing · Memmingen, DE
• Holger Krebs · Erdmannhausen, DE
• Uwe Konzelmann · Asperg, DE

Key dates

• Filing date: May 31, 2002
• Grant date: Oct 21, 2003
• Expiry date: May 31, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/6842
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for measuring at least one parameter of a medium flowing in a line, particularly the intake-air volume of an internal combustion engine. Liquid particles contained in the line act upon a measuring element and influence a characteristic curve of the measuring element which is used to determine parameters of the flowing medium. The characteristic curve of the measuring element can be changed disadvantageously by solid-matter particles. In order to reduce the action of solid-matter particles on the measuring element, a protective grating is proposed in which side walls of channels of the protective grating form various angles of intersection with the flow direction. Solid-matter particles are thereby diverted into a path of motion around the measuring element.