Exam Question
Sketch and describe the operation of a governor suitable for a diesel generator. (16)
Class 4 (4th Engineer)
MEKM
📅 Apr 2023
Reference Answer
### **Principle of Operation of an Electronic-Hydraulic Governor**
The primary function of a governor on a diesel generator is to maintain a constant engine speed (and thus frequency) under varying electrical loads. The governor described is an electronic-hydraulic type, which utilizes electronic speed sensing and control logic to actuate a powerful hydraulic cylinder, providing precise and rapid fuel rack adjustment. This system operates on a closed-loop feedback principle, constantly comparing the actual engine speed to a desired set speed and correcting any deviation.
### **System Components and Construction**
Based on the provided information, the system comprises three main units:
The primary function of a governor on a diesel generator is to maintain a constant engine speed (and thus frequency) under varying electrical loads. The governor described is an electronic-hydraulic type, which utilizes electronic speed sensing and control logic to actuate a powerful hydraulic cylinder, providing precise and rapid fuel rack adjustment. This system operates on a closed-loop feedback principle, constantly comparing the actual engine speed to a desired set speed and correcting any deviation.
### **System Components and Construction**
Based on the provided information, the system comprises three main units:
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