Device for preventing an exhaust gas recirculation valve from sticking after switching off an internal combustion engine
AssigneeSiemens Aktiengesellschaft
InventorTorsten Bellon
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AssigneeSiemens Aktiengesellschaft
InventorTorsten Bellon
Estimating the term…
The invention relates to an exhaust gas recirculation device for an internal combustion engine, especially for a motor vehicle, comprising an exhaust gas recirculation line for recirculating exhaust gas, the line branching off from the exhaust line and running into an unburned gas line. The exhaust gas recirculation line includes a valve having a closing element which can be displaced between a closing position and an opening position by means of an actuator. One aim of the invention is to especially reliably prevent the closing element of the valve from sticking to the valve seat after the operation of the internal combustion engine. To this end, the closing element of the valve is placed in an idle position by means of the actuator, when the internal combustion engine is not in operation.
A device for preventing an exhaust gas recirculation valve from sticking after switching off the internal combustion engine, in particular for a motor vehicle, having an exhaust gas recirculation line which branches off from an exhaust line and leads into a fresh gas line and is used for recirculating exhaust gas, the exhaust gas recirculation line having a valve with a closing element and the closing element being able to be moved between a closing position and an opening position by means of an actuator, and, when the internal combustion engine is not in operation, the closing element of the valve being placed in an idle position by means of the actuator, characterized in that the closing element of the valve can be activated by the actuator via a gear mechanism, it being possible for a rotational movement of the actuator to be converted into a linear movement of the closing element by means of the gear mechanism, and in that the gear mechanism has a first movement range and a second movement range, the first movement range being limited by the opening position and the closing position of the closing element of the valve, and the second movement range being limited by the closing position and the idle position of the closing element of the valve.
Dependencies are inferred from the claim text.