System and method for liquid reductant injection
US8661785B2 · kind B2 · utility
6Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2012 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Sep 7, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for operating a liquid reductant injection system is provided. The method includes storing a reductant mixture of ethanol, water, and urea; drawing the stored mixture into an electrically heated pick-up tube for delivery via a delivery line to the exhaust by operating a pump in a first direction; and, clearing a return line that returns the stored mixture or the delivery line by operating the pump in a second, reverse, direction. In this way, by including ethanol in the reductant solution, a freezing point temperature of the liquid reductant may be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.