Metering arrangement for a liquid exhaust-gas aftertreatment medium and metering method
US9416710B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2012 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Dec 6, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A metering arrangement (3, 30) is proposed for a liquid exhaust-gas aftertreatment medium for the aftertreatment of the exhaust gas of an internal combustion engine which has an exhaust-gas system, in particular for a urea/water solution, having a delivery pump (7) and a metering module (13), wherein the delivery pump (7) is connected to a suction line (23) for sucking the exhaust-gas aftertreatment medium out of a tank (1), wherein the delivery pump (7) and the metering module (13) are connected to one another via a pressure line (25), and the exhaust-gas aftertreatment medium can be fed via the metering module (13) to the exhaust-gas system, wherein a recirculation pump (8) is arranged parallel to the delivery pump (7), wherein the recirculation pump (8) is connected on the suction side to the metering module (13). Furthermore, a corresponding method for metering is proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.