Double-pintle emission control valve having a one-piece double-seat element

摘要

A cylindrical-walled seat element ( 50 ) in a double-pintle ( 42 ) EEGR valve ( 20 ) is a machined metal part in which two substantially identical apertures ( 62, 64 ) collectively span essentially a semi-circumference of the seat element wall ( 52 ) and are separated by a narrow axial stabilizer bar ( 80 ) in that wall.