Temperature maintenance and regulation of vehicle exhaust catalyst systems with phase change materials
US9566552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2014 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Feb 11, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vehicle exhaust system is provided and comprises a catalyst positioned in an exhaust passage of a vehicle. The catalyst is in the form of a washcoat supported on a substrate. The system includes a phase change material located adjacent to the catalyst to maintain the temperature of the catalyst between engine shut-down and subsequent start-up as well as to regulate the temperature during engine operation. In some embodiments, the phase change material comprises particles of a metal or metal alloy encapsulated in a ceramic material. The metal or metal alloy is adapted to have a phase change that occurs within a temperature range wherein the catalyst is active.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.