초록 ▼

Cross flow diesel particulate traps are disclosed in which a cylindrical canister contains a plurality of individual ceramic trap elements. The canister is provided with inlet openings along one side and outlet openings along another side which respectively communicate with inlet and outlet spaces f

Cross flow diesel particulate traps are disclosed in which a cylindrical canister contains a plurality of individual ceramic trap elements. The canister is provided with inlet openings along one side and outlet openings along another side which respectively communicate with inlet and outlet spaces formed between individual ceramic trap elements. The traps are provided with inlet and outlet plenums which communicate with the respective canister openings for directing exhaust gases through the canister and for collecting the exhaust gases. In one embodiment, the inlet plenum is divided by partitions into zones and a diverter valve directs regeneration gases to selected zones canister regeneration. Ceramic trap elements are disclosed adapted for use in a diesel exhaust gas particulate trap formed with a disc-shaped body of open cell ceramic material with opposite faces terminated by partially surrounding peripheral walls which define inlet and outlet gaps at the respective sides of the element. A membrane layer having a pore size substantially smaller than that of the remainder of the body is formed at the outlet surface of the trap element.

대표청구항 ▼

A side entry cross flow trap for diesel particulates, comprising a canister having means defining an enclosing side wall, means closing said side wall at the ends thereof, a plurality of porous ceramic disc-shaped trap elements in said canister, said elements each having an inlet surface on one side

A side entry cross flow trap for diesel particulates, comprising a canister having means defining an enclosing side wall, means closing said side wall at the ends thereof, a plurality of porous ceramic disc-shaped trap elements in said canister, said elements each having an inlet surface on one side thereof and an outlet surface on the opposite side thereof, means mounting a plurality of said elements in said canister with the inlet surface of one said element in opposed spaced relation to the adjacent inlet surface of an adjacent said element and with the outlet surface of one element opposed to the outlet surface of an adjacent said element defining inlet spaces between opposed pairs of said elements and outlet spaces between opposed alternating pairs of said elements, each of said elements having a peripheral wall partially surrounding each of said inlet and outlet surfaces and forming a gap aligned with corresponding said gaps in the walls of immediately adjacent said elements to form common peripheral inlets and outlets opening into said inlet and outlet spaces respectively, means in said canister side wall forming inlet openings aligned with said common inlets communicating with said inlet spaces and outlet openings aligned with said common outlets communicating with said outlet spaces, and plenum means on said canister for directing exhaust gases to said canister inlets and for receiving gases from said canister outlets.