| 摘要 |
An apparatus for holding the speed of an engine to a fixed level with provision for increasing engine speed above that setting without losing the set point. A combination of piston and cylinder assemblies are joined together to control engine speed. An equipment attendant pressurizes one end of a closed hydraulic system to activate a hydraulic operator to change engine speed. Shutting an isolation valve, hydraulically locks that speed setting into the engine. With the isolation valve shut, a biased, bypass piston and cylinder assembly is activated to increase engine speed. The bypass piston and cylinder assembly is actuated by the same device used by the equipment attendant to pressurize the hydraulic system control initially.
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