US 2026/0176998 A1 · MULTI-STAGE EXHAUST AFTER-TREATMENT DEVICE WITH COMPACT CONFIGURATION AND METHODS OF MANUFACTURING, INSTALLING, AND USING THE SAME

Abstract

Multi-stage exhaust after treatment devices and compact arrangements of the same suitable for use in vehicles including diesel freight trucks. The multi-stage exhaust after-treatment device can include a first stage after-treatment component and a second stage after-treatment component that are connected by a transition chamber. The first stage after-treatment component and the second stage after-treatment component can be distinct enclosures shaped, arranged, and attached to form a vertically-stacked configuration with a non-linear upper pathway for exhaust after-treatment and a non-linear lower pathway for exhaust after-treatment that is additionally complemented by mixing in the transition chamber. Methods of manufacturing, integrating, and using such devices are also provided.

Claims20

Dependent claims

A multi-stage exhaust after-treatment device, comprising:

a first stage after-treatment component comprising a plurality of exhaust treatment sections extending along a non-linear path, including a diesel exhaust fluid injector configured to inject diesel exhaust fluid;
and
a second stage after-treatment component positioned downstream of the first stage after-treatment component having a diesel oxidation catalyst;
wherein the first stage after-treatment component is attached over a top surface of the second stage after-treatment component;
and
a transition chamber fluidly connecting the first stage after-treatment component to the second stage after-treatment component so as to allow exhaust from the first stage after-treatment component to be communicated to the second stage after-treatment component.

3 more elements

A vehicle, comprising:

an exhaust inlet coupled to an engine;
and
a multi-stage exhaust after-treatment device, comprising:
a first stage after-treatment component configured to reduce emissions in exhaust communicated from the engine through the first stage after-treatment component;
a transition chamber that communicates the exhaust from the first stage after-treatment component to a second stage after-treatment component;
and
the second stage after-treatment component configured to reduce emissions in the exhaust communicated from the transition chamber through the second stage after-treatment component, wherein the first stage after-treatment component and the second stage after-treatment component comprise distinct enclosures connected by the transition chamber, and wherein the first stage after-treatment component is attached over a top surface of the second stage after-treatment component.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

19/431,669Filed 23 Dec 2025

Priority

23 Dec 2024

Published

25 Jun 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

F01N 13/009
Exhaust or silencing apparatus characterised by constructional features: having two or more separate purifying devices arranged in series
B01D 53/944
By catalytic processes: simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
B01F 23/2132
By spraying or atomising of the liquids: using nozzles
B01F 25/10
Flow mixers; Mixers for falling materials, e.g. solid particles: mixing by creating a vortex flow, e.g. by tangential introduction of flow components

Multi-stage exhaust after-treatment device with compact configuration and methods of manufacturing, installing, and using the same

Life of this patent

Multi-stage exhaust after-treatment device with compact configuration and methods of manufacturing, installing, and using the same

Life of this patent

Abstract

Claims20