| 摘要 |
Device for the ventilation of a transmission case ( 11 ) that is normally intended to hold liquid lubricant for transmission components and includes a residual internal volume of air inside the transmission case that is connected to the atmospheric pressure by way of a passage. With the aim of reducing the quantity of dirt particles than can get into the transmission case by way of the said passage, the passage includes a first section ( 27 ) with a certain flow area and a second section ( 26 ) with, by comparison, an at least approximately 50% larger flow area. The first section ( 27 ) is situated between the atmosphere and the second section ( 26 ). A compressed air source ( 18 ) is connected to the passage between the internal volume of the transmission case ( 11 ) and the first section ( 27 ).
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