SUPERCHARGER WITH EXHAUST GAS RECIRCULATION

摘要

An engine, methods and systems are provided for supercharging charge air for internal combustion engines. The engine having an intake, and a blower with at least one impeller in the intake mounted on a rotatable shaft. An EGR line opens into the intake system upstream of the at least one impeller to form a junction point. A flap, pivotable about an axis running transversely with respect to the intake air flow, has: a first position which blocks the intake by way of a front side, and which opens up the EGR line; and a second position to cover the EGR line and open intake system wherein the flap is not planar, and has, at least on the front side thereof, at least one deformation as an unevenness.

主权项

1. A supercharged internal combustion engine having
an intake system for the supply of a charge-air flow; an exhaust-gas discharge system for the discharge of exhaust gas; at least one blower arranged in the intake system, which blower is equipped with at least one impeller which is mounted, in a housing, on a rotatable shaft; an exhaust-gas recirculation arrangement comprising a recirculation line which branches off from the exhaust-gas discharge system and which opens into the intake system upstream of the at least one impeller so as to form a junction point, the recirculation line branching off upstream of a turbine arranged in the exhaust-gas discharge system; and a flap which is delimited circumferentially by an edge and which is arranged in the intake system at the junction point and which is pivotable about an axis running transversely with respect to the fresh-air flow, in such a way that the flap, in a first end position, by way of a front side, blocks the intake system and opens up the recirculation line, and in a second end position, by way of a rear side, covers the recirculation line and opens up the intake system, wherein
the flap (3) is not planar, andhas, at least on the front side (3′), at least one deformation (4) as an unevenness.