Patent ID: 6935105

Claim:
An apparatus for processing a fluid stream, comprising: a heat exchanger having first and second spaced-apart walls that define an inlet passage and an outlet passage for the fluid stream, wherein the walls are configured to transfer heat from the outlet passage to the inlet passage; a diesel particulate filter integrally connected to the heat exchanger and positioned to transmit the fluid stream from the inlet passage to the outlet passage, wherein the diesel particulate filter is configured to oxidize carbon monoxide and hydrocarbons, and to collect and oxidize particulate matter present in the fluid stream; a fuel injector located and configured to inject hydrocarbons into the inlet passage; one or more pressure sensors configured to produce a pressure signal indicative of any pressure drop through the diesel particulate filter; a temperature sensor configured to produce a temperature signal, indicative of the temperature at a predetermined position adjacent to the diesel particulate filter; and a controller, responsive to the pressure signal and the temperature signal, for controlling the rate at which the fuel injector injects hydrocarbons into the inlet passage.