Controlling Engine Speed Without Power Loss
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ATYPE of engine governor for which claims of controlled speed without power loss are made is that known as the Monarch, an American accessory handled by William Clark (Spare Parts), Ltd., '5, Marshalsea Road, London, S. E .1.
This device depends for its functioning upon pressure variations in the induction manifold. Reference to the accompanying illustration will show that the throttle-valve shaft is coupled up, by a lever arm and connecting rod, to a piston working in a bronze cylinder. There is a port in this cylinder in communication with the inlet manifold, so that as the vacuum effect in the inlet manifold increases, the greater is the tendency to cause the piston to move to the left and so close the throttle. When, however, a driver puts hi foot down, which has the effect of re ducing the degree of vacuum in th induction system, the piston permit the throttle valve to remain fully open Movement of the piston is oppose' by the action of a carefully calibrate. spring coupled up to the lever arm o: the throttle spindle via a link.
A means for effecting an adjustment in cases where a governor is installei on an engine for which it has not bee. specifically calibrated, is provided, bu normally the governor, when once set does not call for any attention.
To reduce wear and friction th throttle spindle and the main 'connect fog rod are mounted on ball bearings Additionally, such a form of mounting avoids, so far as possible, any lag i the action of the governor.