PG EG Governor Actuator
PG EG Governor Actuator
PG EG Governor Actuator
3663
38 (Rev. C
C)
PGA‐‐EG Gover
G nor/A
Actuaator
f Marin
for ne Applicaations
Applicattions
The Woodw ward PGA-EG G Governor/
Actuator is designed
d spe ecifically for
marine appllications requuiring electron nic
engine conttrol with mech hanical backu up.
The governo or/actuator coombines the
proven depe endability of the
t hydro-
mechanical PG governorr with the flexxibility
of an electro
onic control.
Compa atible with a
all
Woodw ward analog g
The mechan nical governo or features or digita
al electronicc
pneumatic tracking
t of the
e speed settinng,
which givess complete ba ackup speed controlss
control from
m a remote loc cation, with on
nly a Pneumatic signal
slight chang
ge in engine speed
s should the
electronic signal fail. sets me
echanical
governo
or speed
The PGA-EG can be use ed with a varie ety of
Woodward electronic con ntrols. The All PG drives,
backup hydro-mechanica al governor giives outputss available
it redundantt speed control for critical
marine needds. Vibratio
on-resistantt
Outputs from m 16 to 678 Nm
N (12 to 50 00 construuction
lb-ft) allow use
u on all size
es of marine engines.
e
Designed to meet
The actuato he PGA-EG requires a 0–2
or portion of th 200 mA control signal. Thiss is SOLAS S (Safety off
compatible with all Wood dward electronic controls. Life at Sea)
S
Descripttion requirements
Special Features
Tracking Electronic Fuel Setting
The system requires the user to provide two simultaneous speed-setting signals (current and pressure). Because simultaneous
speed-setting signals are provided to both portions of the PGA-EG, speed increases only slightly during transition, regardless of
what speed is at the time of the transfer.
The standard PG adjustable needle valve and buffer compensation system is included in the mechanical side of the PG-EG to
adjust for stability of individual engines.
Speed, droop, shutdown devices, and torsional-resistant ballheads are available for the mechanical portion of the PGA-EG.
Linear or Rotary Outputs
Constructed on the standard Woodward PG power case, the PGA-EG is available with all PG linear or rotary output
configurations.
Base and Drive Connections
All current PG governor bases can be used with the PGA-EG. The PGA-EG will adapt to most marine engines being built today
and is also available for retrofit to most existing marine propulsion systems, in many cases without changes in linkage, drive, or
other configurations.
Hydraulic Circuits
The PGA-EG operates from its own sump, using the high volume PG oil pump and accumulators. The proven PG pump and
accumulator is reversible or may be set for one-way rotation. A 140 µm, wire-mesh filter is accessible from the outside of the PGA-
EG case. The filter protects the small orifice in the pilot valve, which is an integral part of the electric actuator.
Optional Features
Mode Select Valve
A mode selector is available which allows a manual, electric, or pneumatic signal to remove the electronic control from the system
for start-up without power and other conditions where mechanical-governor control is desirable.
Booster Servomotor
A booster servomotor may be used with the PGA-EG to help the prime mover start quickly by moving the actuator output toward
the maximum-fuel position at start-up.
Governor Heat Exchanger
A remote heat exchanger may be required to lower governor oil temperatures in applications where governor oil tends to exceed
93 °C (200 °F).
Mode Indication Switch
A switch is available which has both normally open and normally closed contacts. The state of the switch indicates whether the
engine is under electronic or mechanical control.
Woodward 36638 p.3
Ou
utline Drawing of PGA-EG G 29/58
(Do not use for constructiion)