FIELD: internal combustion engines.
SUBSTANCE: in one example, the PM sensor assembly may comprise a bent tube with a first upstream end connected to the outlet channel and a second divergent flare outside, an end on the downstream end of the sensor. Thus, the second end of the bent tube can form a Venturi device, which serves to block ingress of large solid particles into the sensor and additionally serves to increase the exhaust gas flow rate to the sensor assembly.
EFFECT: disclosed are methods and systems for a particulate matter sensor (PM) arranged downstream of a solid particle diesel filter in an internal combustion engine exhaust system.
19 cl, 14 dwg
