| 摘要 |
PROBLEM TO BE SOLVED: To provide a device and a method for maintaining both of desired gas pressure within a crank case and separation efficiency of a centrifugal separator.SOLUTION: A device 1 includes a housing 5 and a centrifugal separator 4 having a centrifugal rotor 6b separation chamber 6a. The centrifugal separator is connected to a gas inlet 7 and a gas outlet 9 for guiding crank case gas from the crank case 2. Based on a signal from a sensor 13 for sensing gas pressure within the crank case, a control apparatus 12 controls a motor 10 to change rotating speed of the centrifugal rotor and controls a valve 15 to regulate a flow of gas passing through the centrifugal separator. As a result, during an operation of a combustion engine, the gas pressure within the crank case is maintained at a predetermined value or in a predetermined pressure section. |
