| 摘要 |
The present invention relates to a dosing device (15) for introducing a liquid medium into an exhaust gas flow of an internal combustion engine (1) of a motor vehicle. The dosing device (15) has a pump (23) to deliver the liquid medium and injects said medium into the exhaust gas flow via a controllable dosing valve (13). The dosing device (15) has a 2/2 directional valve (17) which is arranged in a delivery line (19) between the pump (23) and a first low pressure chamber (47) of the dosing valve (13). |
