Mechanical Governor Systems; Governor System Operation (Typical) - Briggs & Stratton Vanguard 05000 Manual

MECHANICAL GOVERNOR
SYSTEMS

Governor System Operation (Typical)

A governor system operates by transmitting
engine RPM through a pair of flyweights (A) th at
retract and extend a sliding cup ([B] Fig. 1).
Fig. 1
The end of the cup is in contact with the paddle
(A) of the governor crank ([B] Fig. 2).
Fig. 2
The governor crank (A) is connected to the
throttle plate (B) by a governor lever (C) and a
series of interconnecting linkages and springs
([D] Fig. 3).
Fig. 3
The purpose of the governor system is to
maintain a desired engine speed (RPM) in spite
of the changing loads imposed on the engine.
• When at rest, the sprin gs are set to hold
the throttle plate open.
• In operation, the flyweights cause the
throttle plate to close.
The engine speed at which these two forces
balance is called the governed speed and can be
set by using different spring combina tions or
adjustments (E) to the te nsion of the governor
return spring ([F] Fig. 3).
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