Patent ID: 11913412
Assignee: AISAN KOGYO KABUSHIKI KAISHA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An EGR valve of a poppet type comprising:
a housing including a passage for EGR gas;
a valve seat provided in the passage, the passage having an inlet and an outlet and including a bent passage portion bent orthogonally with respect to a direction toward the inlet downstream of the valve seat, the bent passage portion extending from a horizontal plane above the valve seat to a vertical plane that is perpendicular to the horizontal plane;
a valve shaft that passes through the bent passage portion on a downstream side of the valve seat;
a drive unit to reciprocally drive the valve shaft; and
a valve element connected to one end of the valve shaft and configured to be seated on the valve seat;
wherein at each succeeding position of the bent passage portion in a downstream direction, a passage area of the bent passage portion, excluding a sectional area of the valve shaft at that position if the valve shaft passes through the passage area at that position, either (i) is kept constant relative to a preceding position of the bent passage portion or (ii) increases relative to a preceding position of the bent passage portion.