@ The governor is a mechanically-controlled feedback device which maintains the speed of an engine within...

 

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@ The governor is a mechanically-controlled feedback device which maintains the speed of an engine within permissible range whenever there is a variation of load. There is various type of governor in the industry as shown in Q6(a). With the aid of a diagram of forces acting on the governor at the equilibrium, explain the limitations of a Watt governor and how these are rectified in the Porter governor. (b) Figure Q6(a): Various types of governor. [15 marks] In an engine governor of the Porter type, the upper and lower arms having equal length, 200 mm and pivoted on the axis of rotation. The mass of the central load is 25 kg, the mass of each ball is 3 kg and friction of the sleeve together with the resistance of the operating gear is equal to a load of 30 N at the sleeve. If the limiting inclinations of the upper arms to the vertical are 30 and 40, find, taking friction into account, range of speed of the governor. @ The governor is a mechanically-controlled feedback device which maintains the speed of an engine within permissible range whenever there is a variation of load. There is various type of governor in the industry as shown in Q6(a). With the aid of a diagram of forces acting on the governor at the equilibrium, explain the limitations of a Watt governor and how these are rectified in the Porter governor. (b) Figure Q6(a): Various types of governor. [15 marks] In an engine governor of the Porter type, the upper and lower arms having equal length, 200 mm and pivoted on the axis of rotation. The mass of the central load is 25 kg, the mass of each ball is 3 kg and friction of the sleeve together with the resistance of the operating gear is equal to a load of 30 N at the sleeve. If the limiting inclinations of the upper arms to the vertical are 30 and 40, find, taking friction into account, range of speed of the governor.