Patent ID: 9109494
Filing Date: 2015-08-18
Classification: F01L,F01N,Y02T

Abstract:
1. A multi-cylinder engine method, comprising: combusting a rich air-fuel mixture; rotating a circular disc with a single cut-out opening comprising a circular sector to one or more first positions, the opening in the one or more first positions fluidically connecting a pressurized air supply with a first cylinder's exhaust port and not a second cylinder's exhaust port, and injecting air from the pressurized air supply into the first cylinder's exhaust port and not into the second cylinder's exhaust port during the first cylinder's exhaust stroke; and rotating the circular disc to one or more second positions, the cut-out opening in the one or more second positions fluidically connecting the pressurized air supply with the second cylinder's exhaust port and not the first cylinder's exhaust port, and injecting air from the pressurized air supply into the second cylinder's exhaust port and not into the first cylinder's exhaust port during the second cylinder's exhaust stroke.