| 摘要 |
An arrangement (2) for precleaning in an air filter (4) for the air intake of a requested flow of air (6) to a combustion engine. The arrangement (2) comprises an ejector (8) adapted to withdraw by suction a second flow of air (10) with air and particles from a precleaner (12) in the said air filter (4), and a suction withdrawal unit (14) arranged in connection with the said ejector (8) and adapted to generate the said second flow of air (10) from the said precleaner (12). The arrangement (2) further comprises a control unit (16) adapted to control the said second flow of air (10) for the said suction withdrawal unit (14) by means of a control signal (18), whereby the control unit (16) is adapted to control the said second flow of air (10) according to predetermined control rules, depending on one or several parameters (20) related to the operation of the combustion engine. |
