VENTURI FLOW METER WITH VACUUM INSULATION FOR EXHAUST GAS RECIRCULATION SYSTEM Russian patent published in 2016 - IPC F02M26/04 F02D21/08 F02B33/44 G01F1/44 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, namely to exhaust gas recirculation systems for internal combustion engines. Venturi flow meter (70) for placing in the cooled exhaust gas recirculation (EGR) system, which comprises an exhaust gas recirculation pipeline. Exhaust gas recirculation pipeline is connected to the outlet pipeline of the internal combustion engine. Exhaust gas recirculation system comprises a cooler of the EGR system, which is connected to the exhaust gas recirculation pipeline. Venturi flow meter (70) is attached in the exhaust gas recirculation pipeline for receiving exhaust gases from the cooler of the EGR system. Venturi flow meter (70) has inner wall (72), which forms inner space (74). Inner space (74) includes inlet convergent part (76), narrowed part (78) and expanding outlet part (80). Outer wall (90) surrounds inner wall (72) and is attached to it. Outer wall (90) is spaced from inner wall (72) to form insulating space (92) between internal (72) and external (90) walls. Also disclosed is an exhaust system of the internal combustion engine, containing the Venturi flow meter.

EFFECT: technical result is reduced probability of moisture condensation in the Venturi flow meter.

8 cl, 2 dwg