TM 5-3805-280-24-1
Theory of Operation
ENGINE SPEED SENSING CONTROL CIRCUIT OPERATION
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speed is a function of the engine and pump controller
The function of engine speed sensing control circuit
and is selected when the engine rpm dial (A) is turned
(G) is to reduce the hydraulic load on the engine if it
to the desired actual engine speed.
exceeds the output torque of the engine.
The pilot oil control signal is sent to the end of the load
The speed sensing solenoid valve (F) coil is energized
piston in the front and rear pump regulators (D and E)
by an electrical signal from the engine and pump
which then operate to reduce pump flow. (See
controller (B) when the actual engine speed, as
Hydraulic Pump Regulator Operation in this group.)
sensed by the engine speed sensor (C), is pulled
down to the target engine speed. The target engine
TX,05,GG2201 1920MAY981/1
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