Patent ID: 9388770
Filing Date: 2016-07-12
CPC Classification: F02B,F02D,F02M,Y02T

Claim Text:
1. An exhaust gas recirculation system for an engine, in which an EGR passage is provided to communicate between an exhaust passage and an intake passage and allow a part of exhaust gas flowing through the exhaust passage to be recirculated to the intake passage therethrough, wherein characterized in that: the exhaust passage is equipped with a turbine wheel of a turbocharger; and at least a downstream sub-region of a region of the exhaust passage upstream of the turbine wheel is divided into two sub-passages by a partition wall extending along an exhaust gas flow direction, wherein one of the two sub-passages is equipped with an openable-closable exhaust variable valve operated by a controller, the exhaust variable valve being configured to be controlled to open the one sub-passage when an engine speed is equal to or greater than a reference speed, and close the one sub-passage when the engine speed is less than the reference speed, and wherein an inlet of the EGR passage on the side of the exhaust passage is opened to the one sub-passage at a position downstream of the exhaust variable valve.