| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent silting in a hydraulic actuator for operating a compressive fluid adjusting apparatus for adjusting the flow of a compressive fluid such as a turbocharger and an EGR valve, and to prevent fluctuation in the flow velocity and the flow rate to be adjusted by the compressive fluid adjusting apparatus even when a normal control electric command imparted to a solenoid valve is in a constant value. <P>SOLUTION: A piston which is an operation member of a hydraulic servo valve for driving a variable turbocharger is operated, and the electric command for preventing silting of a size not changing the flow velocity of exhaust gas adjusted by the variable turbocharger is imparted to an EPC valve. Further, a nozzle vane which is an operation member of the variable turbocharger is operated, and the electric command for preventing silting of a size where the flow velocity of the exhaust gas is not changed by the variable turbocharger is imparted to the EPC valve. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
