| 摘要 |
A dry air filter for combustion engines of commercial vehicles with a device to produce compressed air, whereby the dry air filter (4) consisting of a filter housing (5) containing a filter cartridge (7) and a dust preliminary filtering stage (6), with an exhaust (8) for the dust discharged from the preliminary filtering stage which has a nozzle shaped section in which compressed air that is produced is blown through a conduit in the direction of the free opening by an ejector effect. In order that the air filter is easier to service and maintain, the compressed air is fed over a ring slot (28) into the exhaust (8) and is blown in the direction of the open outlet (21) for the purpose of creating an ejector effect to keep the exhaust free from dust. Compressed air is blown through the exhaust so that blockages cannot build up there nor in the area of the preliminary filtering stage. Specific, regular supervision of this area therefore becomes necessary.
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