Exhaust gas sensor

US10866207B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Johannes Weber · Stuttgart, DE
• Benjamin Sillmann · Aschersleben, DE
• Christoph Gmelin · Stuttgart, DE
• Christopher Holzknecht · Stuttgart, DE
• Karel Vacha · Mirkovice, CZ
• Katerina Lieblova · Dolní Třebonín, CZ
• Milan Kotynek · Olešník, CZ
• Rafael Gitzmann · Stuttgart, DE
• Sebastian Schulte Am Huelse · Stuttgart, DE
• Simon Rentschler · Schwaikheim, DE
• Stefan Buehler · Kappelrodeck, DE

Key dates

• Filing date: Nov 15, 2016
• Grant date: Dec 15, 2020
• Expiry date: Feb 10, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4077
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An exhaust gas sensor for detecting a measurement gas component, having a ceramic sensor element fixed in a housing, and a double-walled protective pipe having outer and inner protective sleeves, the inner sleeve enclosing a gas chamber into which the sensor element extends with a segment at the measurement gas side, in the direction of a longitudinal axis of the sensor, and an annular chamber being formed between the outer and inner protective sleeves. The outer sleeve has a cladding surface having at least one opening configured as a swirling element, through which measurement gas can move into the annular chamber with rotation about a longitudinal axis of the sensor, and the inner sleeve has at least one opening that is adjusted and/or functionally optimized, as to a sensitive region of the sensor element, through which opening the measurement gas can move from the annular chamber into the gas chamber.