Dual purpose doser spring
US11255243B1 · kind B1 · utility
1Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2020 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Oct 23, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An injection assembly for a vehicle exhaust system includes a housing defining a fluid cavity, a doser mounted to the housing and configured to inject a fluid into the fluid cavity, and a valve to control flow of the fluid. The valve is moveable between an open position and a closed position. A resilient member is configured with a biasing force to bias the valve to the closed position. The biasing force is overcome when fluid is heated downstream of the valve and exceeds a predetermined pressure level to allow backflow into the fluid cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.