Device and method for metering a liquid into the exhaust tract of an internal combustion engine
US9556768B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 2011 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Feb 4, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a device and method for metering a liquid, in particular a fuel, into an exhaust gas tract of an internal combustion engine, wherein the device comprises at least one injection valve that can be closed by a closing member and that has cooling circuit for regulating the temperature in the injection valve, and wherein a throttle element is connected upstream of the injection valve to control, by closed loop or open loop, the quantity of a volume flow of the liquid through the injection valve, in particular through the cooling circuit of the injection valve, wherein the injection valve opens when the throttle element de-throttles the volume flow of the liquid to the injection valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.