Patent ID: 6561143
Filing Date: 2003-05-13
Classification: F01L,Y10T

Abstract:
A valve for mass flow control in an induction tract of an internal combustion engine, said engine induction tract including:a first direction of said mass flow toward said engine, a second direction of said mass flow away from said engine, a first pressure urging said mass flow in said first direction toward said engine, a second pressure urging said mass flow in said second direction away from said engine, said valve including: a body with a seat having a curved surface, a moveable member which has a closed position which effectively closes said valve when operationally covering said seat but which is able to move away from said seat in response to said first pressure to open said valve, said moveable member having a curved shape, said curved shape having a first side which is always convex and a second side which is always concave, an attachment means which is effective in positioning said moveable member relative to said body and said seat, wherein said first convex side always faces away from said engine and wherein said curve in said first convex side is always effective in creating good aerodynamic mass flow properties in first direction toward said engine, and wherein said second concave side always faces toward said engine and is always effective in reducing said mass flow in said second direction away from said engine.