Decomposition chamber for aftertreatment system

A decomposition chamber for an aftertreatment system, the decomposition chamber comprising:

• a conduit having an inlet and an outlet, the conduit extending along a conduit axis from the inlet to the outlet;
• a first mixing plate disposed in the conduit, the first mixing plate comprising:
• a downstream edge,
• a plurality of first vertical crossmembers,
• a plurality of first transverse crossmembers, each of the first transverse crossmembers coupled to at least one of the first vertical crossmembers, and
• a plurality of first deflectors, each of the first deflectors coupled to one of the first vertical crossmembers or one of the first transverse crossmembers,
• wherein, in a reference plane, which extends along the conduit axis of the conduit, an orientation of a first plate plane in which the plurality of first vertical crossmembers extend is at a first plate angle between 30 degrees and 90 degrees clockwise, inclusive, relative to the conduit axis;
• and
• a second mixing plate disposed in the conduit downstream of the first mixing plate, the second mixing plate comprising:
• an upstream edge,
• a plurality of second vertical crossmembers,
• a plurality of second transverse crossmember, each of the second transverse crossmembers coupled to at least one of the second vertical crossmembers, and
• a plurality of second deflectors, each of the second deflectors coupled to one of the second vertical crossmembers or one of the second transverse crossmembers;
• wherein the downstream edge is separated from the upstream edge by a distance that is less than 100 millimeters;
• and
• wherein in the reference plane, which extends along the conduit axis of the conduit, an orientation of the first plate plane in which the plurality of first vertical crossmembers extend is parallel to an orientation of a second plate plane in which the plurality of second vertical crossmembers extend.

A decomposition chamber for an aftertreatment system, the decomposition chamber comprising:

• a conduit having an inlet and an outlet, the conduit extending along a conduit axis from the inlet to the outlet;
• a first mixing plate disposed in the conduit, the first mixing plate comprising:
• a downstream edge,
• a plurality of first vertical crossmembers,
• a plurality of first transverse crossmembers, each of the first transverse crossmembers coupled to at least one of the first vertical crossmembers, and
• a plurality of first deflectors, each of the first deflectors coupled to one of the first vertical crossmembers or one of the first transverse crossmembers,
• wherein in a reference plane, which extends along the conduit axis of the conduit, an orientation of a first plate plane in which the plurality of first vertical crossmembers extend is oblique to the conduit axis;
• a second mixing plate disposed in the conduit downstream of the first mixing plate, the second mixing plate comprising:
• an upstream edge,
• a plurality of second vertical crossmembers,
• a plurality of second transverse crossmembers, each of the second transverse crossmembers coupled to at least one of the second vertical crossmembers, and
• a plurality of second deflectors, each of the second deflectors coupled to one of the second vertical crossmembers or one of the second transverse crossmembers,
• wherein in the reference plane, an orientation of a second plate plane in which the plurality of second vertical crossmembers extend is oblique to the conduit axis;
• wherein the downstream edge is separated from the upstream edge by a distance that is less than 100 millimeters;
• and
• wherein in the reference plane, the orientation of the first plate plane in which the plurality of first vertical crossmembers extend is parallel to the orientation of the second plate plane in which the plurality of second vertical crossmembers extend.

A decomposition chamber for an aftertreatment system, the decomposition chamber comprising:

• a conduit having an inlet and an outlet, the conduit extending along a conduit axis from the inlet to the outlet;
• a first mixing plate disposed in the conduit, the first mixing plate comprising:
• a plurality of first vertical crossmembers,
• a plurality of first transverse crossmembers, each of the first transverse crossmembers coupled to at least one of the first vertical crossmembers, and
• a plurality of first deflectors, each of the first deflectors coupled to one of the first vertical crossmembers or one of the first transverse crossmembers,
• wherein, in a reference plane, which extends along the conduit axis of the conduit, an orientation of a first plate plane in which the plurality of first vertical crossmembers extend is at a first plate angle between 30 degrees and 90 degrees clockwise, inclusive, relative to the conduit axis,
• a second mixing plate disposed in the conduit downstream of the first mixing plate, the second mixing plate comprising:
• a plurality of second vertical crossmembers,
• a plurality of second transverse crossmembers, each of the second transverse crossmembers coupled to at least one of the second vertical crossmembers, and
• a plurality of second deflectors, each of the second deflectors coupled to one of the second vertical crossmembers or one of the second transverse crossmembers;
• a vane mixer disposed in the conduit downstream of the first mixing plate and the second mixing plate, the vane mixer comprising a plurality of vanes, the vanes defining a plurality of vane apertures therebetween;
• and
• a baffle coupled to the conduit and comprising a portion having a partial annular shape.

A decomposition chamber for an aftertreatment system, the decomposition chamber comprising:

• a conduit having an inlet and an outlet, the conduit extending along a conduit axis from the inlet to the outlet;
• a first mixing plate disposed in the conduit, the first mixing plate comprising:
• a plurality of first vertical crossmembers,
• a plurality of first transverse crossmembers, each of the first transverse crossmembers coupled to at least one of the first vertical crossmembers, and
• a plurality of first deflectors, each of the first deflectors coupled to one of the first vertical crossmembers or one of the first transverse crossmembers;
• a second mixing plate disposed in the conduit downstream of the first mixing plate, the second mixing plate comprising:
• a plurality of second vertical crossmembers,
• a plurality of second transverse crossmembers, each of the second transverse crossmembers coupled to at one of the second vertical crossmembers, and
• a plurality of second deflectors each of the second deflectors coupled to one of the second vertical crossmembers or one of the second transverse crossmembers;
• a vane mixer disposed in the conduit downstream of the first mixing plate and the second mixing plate, the vane mixer comprising a plurality of vanes, the vanes defining a plurality of vane apertures therebetween;
• a baffle coupled to the conduit and comprising a portion having a partial annular shape;
• and
• a doser mount coupled to the conduit, the doser mount comprising:
• an injection opening centered on an injection axis,
• a connection port defining the injection opening,
• an upstream wall extending from the connection port toward the inlet of the conduit, in a reference plane, which extends along the conduit axis of the conduit, the upstream wall is oriented at a first mount angle relative to the conduit axis, the first mount angle between 0 degrees and 5 degrees, inclusive, and
• a downstream wall extending from the connection port toward the outlet of the conduit, in the reference plane, the downstream wall is at a second mount angle relative to the conduit axis, the second mount angle between 135 degrees and 175 degrees, inclusive;
• wherein, in a cross-sectional view along the conduit axis of the conduit, the injection axis of the doser mount is oriented at an injection angle between 105 degrees and 165 degrees, inclusive, relative to the conduit axis.

A decomposition chamber for an aftertreatment system, the decomposition chamber comprising:

• a conduit having an inlet and an outlet, the conduit extending along a conduit axis from the inlet to the outlet;
• a first mixing plate disposed in the conduit, the first mixing plate comprising:
• a plurality of first vertical crossmembers,
• a plurality of first transverse crossmembers, each of the first transverse crossmembers coupled to at least one of the first vertical crossmembers, and
• a plurality of first deflectors, each of the first deflectors coupled to one of the first vertical crossmembers or one of the first transverse crossmembers;
• a second mixing plate disposed in the conduit downstream of the first mixing plate, the second mixing plate comprising:
• a plurality of second vertical crossmembers,
• a plurality of second transverse crossmembers, each of the second transverse crossmembers coupled to at least one of the second vertical crossmembers, and
• a plurality of second deflectors, each of the second deflectors coupled to one of the second vertical crossmembers or one of the second transverse crossmembers;
• a vane mixer disposed in the conduit downstream of the first mixing plate and the second mixing plate, the vane mixer comprising a plurality of vanes, the vanes defining a plurality of vane apertures therebetween;
• a baffle coupled to the conduit and comprising a portion having a partial annular shape;
• and
• a doser mount coupled to the conduit, the doser mount comprising an injection opening centered on an injection axis, wherein:
• in a cross-sectional view along the conduit axis of the conduit, the injection axis of the doser mount is oriented at an injection angle between 105 degrees and 165 degrees, inclusive, relative to the conduit axis;
• the first mixing plate comprises a first upstream edge;
• a first portion of the first upstream edge is positioned at a first location along the conduit axis and opposite the doser mount, and a second portion of the first upstream edge is positioned at a second location along the conduit axis, adjacent and downstream of the doser mount;
• the second mixing plate comprises a second upstream edge;
• and
• a first portion of the second upstream edge is positioned at a third location along the conduit axis and opposite the doser mount, and a second portion of the second upstream edge is positioned at a fourth location along the conduit axis adjacent and downstream of the doser mount.