Patent ID: 8769927
Filing Date: 2014-07-08
Classification: F02B,F02M,Y02T

Abstract:
1. A method of controlling recirculated exhaust gas provided to an internal combustion engine, which has one or more combustion cylinders, a main exhaust line and an exhaust gas recirculation (EGR) loop, comprising: providing each cylinder with two exhaust valves, each separately controllable; wherein a first exhaust valve is connected to the main exhaust line and a second exhaust valve is connected to the EGR loop; controlling the exhaust valves such that exhaust from each cylinder does not flow through both of its exhaust valves at the same time; providing a post-combustion fuel injection event during each engine cycle; and timing the post-combustion fuel injection event and the operation of the exhaust valves so that exhaust from the post-combustion fuel injection event flows only through the second exhaust valve.