Abstract: An exhaust processor having a particulate trap regeneration system is provided. The exhaust processor includes a housing having an inlet for introducing a combustion product containing a contaminate or other particulate matter from an engine and an outlet for exhausting filtered or otherwise treated combustion product from the housing. At least one substrate is situated in the housing from the inlet. The exhaust processor further includes a trap burner for burning particulate matter collected in the substrate. The trap burner is operable to periodically oxidize the trapped particulate matter and thereby regenerate the substrate. The exhaust processor still further includes a bypass system for regulating the flow rate of combustion product introduced into the housing during regeneration of the substrate. The exhaust processor permits combustion product to be introduced into the housing for treatment in the substrate while regeneration of that substrate is actually occurring.

Abstract: A fluid flow restrictor for use in a high pressure valve or the like which comprises a series of closely interfitting concentric cylinders alternately attached to the valve seat and an axially movable valve plug of the valve. In one advantageous embodiment of the invention, various arrangements of slot openings are formed through the several cylinders. The slot openings may be of any geometric shape, for example, rectangular or trapezoidal, and are of sufficient volume to act as expansion chambers for a compressible fluid. The openings of each cylinder communicate with the openings of an adjacent cylinder by various overlapping relationships between openings or by viscous friction flow paths between the cylinders to form restricting flow paths therebetween. Axial displacement of the valve plug will move the interfitting cylinders with respect to one another to vary the flow path dimensions between the slot openings of the cylinders.

Abstract: A fluid flow restrictor for use in a high pressure valve or the like which comprises a series of closely interfitting concentric cylinders alternately attached to the valve seat and an axially movable valve plug of the valve. In one advantageous embodiment of the invention, various arrangements of slot openings are formed through the several cylinders. The slot openings may be of any geometric shape, for example, rectangular or trapezoidal, and are of sufficient volume to act as expansion chambers for a compressible fluid. The openings of each cylinder communicate with the openings of an adjacent cylinder by various overlapping relationships between openings or by viscous friction flow paths between the cylinders to form restricting flow paths therebetween. Axial displacement of the valve plug will move the interfitting cylinders with respect to one another to vary the flow path dimensions between the slot openings of the cylinders.