Patent ID: 6009709
Filing Date: 2000-01-04
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
A system for controlling exhaust gas recirculation in an internal combustion engine, said engine having an inlet manifold, an exhaust manifold, a plurality of combustion chambers, and an air intake pressurizing device being connectable to said inlet manifold, the system comprising:a recirculation manifold being connectable to at least one of said plurality of combustion chambers;a pressure sensing device being connectable to said inlet manifold, said pressure sensing device measuring an inlet air pressure; anda flow control device having a first position and a second position, said flow control device being movable between said first position and said second position, said flow control device being connectable to said recirculation manifold, said inlet manifold and said exhaust manifold, said first position having a flow passage between said recirculation manifold and said inlet manifold, said second position having a flow blockage between said recirculation manifold and said inlet manifold, said flow control device being responsive to said pressure sensing device and being adapted to move from said second position to said first position when the inlet air pressure is above a predetermined level near a maximum boost pressure of said engine, said maximum boost pressure being a function of said engine and being indicative of a high load condition.