| 摘要 |
A switching system is described herein for an engine having redundant control components. The switching system generally includes an actuator, a control system, inlet and outlet lines, and a transfer valve. The actuator is operable to control an engine parameter. The control system includes a first electrohydraulic servo valve and a second electrohydraulic servo valve, the first and second servo valves being fluidically connected to the actuator for operating the actuator. The inlet line supplies pressurized fluid and the outlet line drains fluid. The transfer valve is positioned between the first and second servo valves and the inlet and outlet lines. The system may further include additional control systems with redundant EHSVs. This invention minimizes size and space requirements, and allows nearly simultaneous transfer of all control systems, while minimizing the transient disturbance to the control system(s).
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