Abstract:
An exhaust valve assembly (10) includes a valve body, a valve (12) supported by a shaft (14) within the valve body, and an actuator (18) that moves the valve relative to the valve body to control exhaust flow. The actuator is thermally isolated from the valve by a linkage mechanism (30) that cooperates with exhaust flow to move the valve between open and closed positions. The actuator temporarily contacts the linkage mechanism to initiate opening and closing movement but then moves out of contact with the linkage mechanism as the exhaust flow exerts a force against the valve to move the valve to a fully open or fully closed position. This temporary contact between the linkage mechanism and the actuator reduces heat transfer from the valve to the actuator.
Abstract:
A method for operating an emission abatement assembly (10) includes determining if a particulate filter (18) needs to be regenerated and adjusting the operation of an internal combustion engine (12) to increase oxygen content in exhaust gases generated by the engine (12) to generate heat in a fuel-fired burner (16) for combusting soot trapped in the particulate filter (18). An emission abatement assembly (10) is also disclosed.
Abstract:
An emission abatement assembly (14) includes a housing (62) having an inlet (38) and an outlet (69), the inlet (38) being configured to receive exhaust gas from an exhaust manifold (15) of an internal combustion engine (13). The assembly (14) further includes a fuel-fired burner (18) disposed within the housing (62) and a particulate filter (20) positioned downstream of the fuel-fired burner (18). The assembly (14) further includes a baffle assembly (24) positioned downstream of the particulate filter (20). The baffle assembly (24) includes a cap (28) configured to redirect exhaust gases exiting the outlet (69) in a downwardly and outwardly direction and a first baffle (30) configured to redirect exhaust gases redirected by the cap (28) in an upwardly and outwardly direction. A method of operating an emissions abatement assembly (14) is also disclosed.
Abstract:
An exhaust system for use with an engine comprises at least one valve and a camshaft. The at least one valve is configured to control flow in the exhaust system but is discrete from each intake valve of the engine and each exhaust valve of the engine. The camshaft is configured to operate the at least one valve. An associated method is disclosed.
Abstract:
A plasma fuel reformer includes an electrode assembly having a first electrode and a second electrode. The second electrode is spaced apart from the first electrode to define an electrode gap. A catalyst is positioned downstream of the electrode assembly. A filter is positioned between the electrode assembly and the catalyst.
Abstract:
An exhaust system (10) includes a flange assembly (18, 26) having multiple identical flange portions (34) manufactured of a powdered metal. By assembling each flange assembly (18, 26)from identical flange portions (34), and utilizing powder metal, manufacturing expense is decreased.
Abstract:
An exhaust processor (12) comprises an isolated interior volume (16) that is defined in a housing (18) of the exhaust processor (12) so as to be isolated from exhaust gas in the housing (18). A motion converter (20) is positioned in the isolated interior volume (16) and is configured to convert in the isolated interior volume (16) linear movement of a linear valve actuator (22) into rotation of an exhaust valve (17). A cushioning pad (120, 122, 320, 420) can be used in a variety of exhaust processors (12, 212) to facilitate positioning of the exhaust valve (17). An associated method is disclosed.
Abstract:
An emission abatement assembly includes a first particulate filter having a first fuel-fired burner associated therewith and a second particulate filter having a second fuel-fired burner associated therewith. A control unit controls operation of both the first fuel-fired burner and the second fuel-fired burner. A method of operating an emission abatement assembly is also disclosed.
Abstract:
A circuit for providing a potential difference across a gap between two electrodes of a fuel reformer, oxides of nitrogen trap or soot filter regenerator for an internal combustion engine or the like. The circuit includes a power source, a transformer including a primary winding and a secondary winding for coupling across the electrodes. The power source is coupled to the primary winding. A switch of switches is/are coupled to the primary winding.
Abstract:
A method of operating a power system (10, 110, 210) is includes operating an internal combustion engine (14) so as to produce an engine vacuum, and advancing air into a fuel reformer (12) with the engine vacuum. The method also includes advancing reformate gas produced by the fuel reformer (12) to a component such as the intake (22) of the engine (14), an emission abatement device, or a fuel cell. A power system (10, 110) operated by such a method is also disclosed.