PARTICULATE SENSOR

• Main Authors: KOTYNEK, Milan, SCHULTE AM HUELSE, Sebastian, RUBAS, Vojtech, ECKARDT, Martin
• Format: Patent
• Language: English; French; German
• Published: 20.03.2024
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PHYSICS; STEAM ENGINES; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; WEAPONS

The invention relates to an exhaust gas sensor, in particular a particle sensor, comprising a sleeve-shaped sensor housing (12), a sensor element (14), which is fixed in the sensor housing (12) and which protrudes beyond the sensor housing (12) on the exhaust gas side, and a sleeve-shaped protective tube (20), which is fastened to the sensor housing (12) on the exhaust gas side, the protective tube (20) consisting of an inner protective sleeve (21) and an outer protective sleeve (22), the inner protective sleeve (21) surrounding an exhaust-gas-side end region (141) of the sensor element (14), the outer protective sleeve (22) surrounding the inner protective sleeve (21) at least in some regions such that an annular space (30) is formed between the outer protective sleeve (22) and the inner protective sleeve (21), the outer protective sleeve (22) and the inner protective sleeve (21) each having a gas outlet and a gas inlet, and flow through the protective tube (20) occurs from the gas inlet of the outer protective sleeve (22) into the annular space (30), from there through the gas inlet of the inner protective sleeve (21) into the interior of the inner protective sleeve (21) and from there through the gas outlets of the outer and inner protective sleeves (21, 22). According to the invention, the gas inlet of the inner protective sleeve (21) forms the smallest flow cross-section for the flow through the protective tube (20).