Exhaust gas treatment system for controlling hydrocarbon adsorption/desorption in hydrocarbon trap
US12338762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2023 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Sep 6, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2550/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas treatment system including: an internal combustion engine comprising an exhaust gas outlet; a first three way catalyst downstream of the exhaust gas outlet, wherein the first three way catalyst receives an exhaust output from the exhaust gas outlet; a hydrocarbon trap downstream of the first three way catalyst, wherein the hydrocarbon trap receives an exhaust output from the first three way catalyst; an exhaust heating unit downstream of the hydrocarbon trap, wherein the exhaust heating unit receives an exhaust output from the hydrocarbon trap; and a second three way catalyst downstream of the exhaust heating unit, wherein the second three way catalyst receives an exhaust output from the heating unit, wherein an air injection port is configured to selectively deliver a stream of air upstream of the hydrocarbon trap and downstream of the first three way catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.