| 摘要 |
A method of determining a pressure at a dosing valve of a fuel metering device for metering fuel into an exhaust gas system of a combustion engine with a component of the combustion engine assigned to an exhaust gas system for a regeneration, a temperature impingement and/or a thermo management. The fuel is injected in a flow direction of the exhaust gas in front of the component, and metering of the fuel is determined by an injection valve from a cycle duration and a duty cycle relation for controlling a shut-off valve and the dosing valve depending on a difference pressure. The method includes determining a pressure before the dosing valve via acquisition and processing of at least one replacement value deduced from a pressure sensor signal of a pressure sensor arranged in a flow direction of the fuel behind the dosing valve for recording a measured pressure.
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