Device for determining at least one parameter of a medium flowing in a conduit and having a separation opening in the bypass passage

US7360414B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Uwe Konzelmann · Asperg, DE
• Henning Marberg · Weil der Stadt, DE
• Christoph Gmelin · Stuttgart, DE

Key dates

• Filing date: Jun 18, 2004
• Grant date: Apr 22, 2008
• Expiry date: Jul 18, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F5/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Devices for determining at least one parameter of a medium flowing in a conduit, in particular for determining the air-mass flow in the intake tract of an internal combustion engine, including a conduit member and sensor device having a bypass section are already known. To prevent flow detachment at the side walls of the bypass section, it is proposed that a flow guide wall running substantially parallel to the side wall provided with the separation opening of the bypass section be arranged in the conduit member behind the separation opening, as viewed in the main flow direction; the length dimension b of the flow guide wall, as viewed in the main flow direction, being equal to or greater than the distance a of the separation opening from the rear wall; and the distance c of the flow guide wall from the center axis of the conduit member being greater than or equal to the distance d of the side wall provided with the separation opening of the bypass section from the center axis.