Patent ID: 8607566

Claim:
A method of emission management for an internal combustion engine comprising: providing an internal combustion engine with at least one first working chamber and moving member moved in said chamber by a first expansion of working gases in the at least one of said first working chamber for extracting work; providing an expander having an expander working chamber, wherein said expander working chamber has a maximum volume larger than a maximum volume of the at least one of said first working chamber such that said expander working chamber provides a second expansion larger than said first expansion; providing an exhaust valve between the at least one of said first working chamber and an emission treatment station; providing an intake valve between said emission treatment station and said expander working chamber; opening said exhaust valve between the at least one of said first working chamber and an emission treatment station for discharging said working gases from the at least one of said first working chamber to said emission treatment station while said intake valve between said emission treatment station and said expander is closed; closing said exhaust valve between the at least one of said first working chamber and an emission treatment station treating said working gases in said emission treatment station after being discharged from the at least one of said first working chamber for reducing emissions; opening said intake valve between said emission treatment station and said expander working chamber for delivering said working gas to said expander working chamber to extract additional work from said working gas; closing said intake valve between said emission treatment station and said expander working chamber; and discharging said working gases from said expander working chamber of said expander.