Patent ID: 9534517
Date: 2017-01-03
CPC Classifications: F01L,F02D,F02M,Y02T

Claim:
1. An engine method, comprising: operating a first set of exhaust valves of a first group of cylinders routing exhaust to a turbine to have no overlap in exhaust valve opening events so that no exhaust valves of the first set of exhaust valves of different cylinders for the first group of cylinders are open at the same time; operating one or more exhaust valves in a second set of exhaust valves of a dedicated EGR cylinder routing exhaust to an intake manifold so that opening of the one or more exhaust valves in the second set of exhaust valves overlaps with opening of exhaust valves of two cylinders of the first group of cylinders; and firing the dedicated EGR cylinder, via ignition, at a different timing than each cylinder of the first group of cylinders.