| 摘要 |
The invention relates to a reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction, with a delivery pump (2) by means of which the reducing agent is delivered from a reducing agent tank (1) via a delivery line (3) and is introduced into the exhaust gas flow of the internal combustion engine via at least one nozzle (7), a metering chamber (4) being integrated into the delivery line (3) and being divided into two separate volumes (10, 20) by means of a position-variable element (5), each of the two volumes (10, 20) having at least one input (11, 21) and at least one output (12, 22). Furthermore the invention relates to a method for operating such a reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction. |
