Patent ID: 9470182
Filing Date: 2016-10-18
CPC Classification: F02B,F02D,F02M,F05B,Y02T

Claim Text:
1. A method for controlling exhaust gas of an engine comprising: isolating blow-down gases of a cylinder to a first exhaust conduit and residual gases to a second exhaust conduit, the exhaust conduits coupled to the cylinder via first and second exhaust valves; recovering heat from a first portion of the gases in the first exhaust conduit to a liquid via a heat recovery device, and then returning the cooled gases to the second exhaust conduit that is in communication with the first exhaust conduit downstream of the heat recovery device, the second exhaust conduit including a first catalyst and a second catalyst, the first catalyst upstream of the second catalyst; directing a second portion of the gases in the first exhaust conduit to a turbine positioned in a third exhaust conduit; and adjusting, via a controller, a turbine shut-off valve, positioned downstream of the turbine, based on an operating condition of the engine received at the controller, to flow exhaust from the third exhaust conduit into the second exhaust conduit, wherein the third exhaust conduit is coupled to the second exhaust conduit at a location between the first catalyst and the second catalyst.