7.3.2. Electric governor system
1) AD136/T/TI
Governor system for fuel injection pump consists of “Integral Actuator” and “ Speed Control
Unit”.
(1) ACAD176 Series Electric Actuator
•
Introduction
The ACD176 SERIES electric actuator is designed to mount directly on a Bosch “A” size
fuel injection pump, with a left hand rack, in place of the mechanical governor. When the
ACE176 is installed on the fuel pump, an optimum performance, long life fuel control
system results. An external fuel shut off lever is available to manually override the
actuator’s control. Also provided is an adjustable internal maximum fuel limit
The ACD176 can control fuel pumps of up to 6 cylinders.
The actuator was designed with two isolated chambers. The upper chamber is wet with
oil and contains the connection to the fuel rack and an optional manual shut off
mechanism.
The sealed lower chamber contains the electromagnetic components.
This design eliminates the possibility of magnetic pa other oil contaminants interfering
with the operation eletric actuator. Unreliable devices such as bell sliding seals are not
used so that no maintenance is The designed ieft of the actuator is typically longer of the
engine.
Available actuator models : ACD176-12 (12V w/o manual shutoff)
ACD176-24 (24V w/o manual shutoff)
ACD176A-12 (12V w/ manual shutoff)
ACD176A-24 (24V w/ manual shutoff)
The 176 SERIES actuator can also be supplied with tion sensor that allows the actuator
to be used in a agement system. Contact GAC for assistance.
•
Specifications
Performance
Force........... (see Figure 1) ............................................................ 6.2 lb. (27.5 N)
Operating Stroke............................................................................ 0.80 in. (21 mm)
Response Time (10 ~ 90 %, 2 - 19 mm) .................................................. 35 msec.
Electrical Power Input
Operating Voltage ............................................................................. 12 or 24V DC
Nominal Operating Curren...........12V DC version ......................................... 4.0 A
24V DC version ......................................... 2.0 A
Maximum Current ........................12V DC version ......................................... 5.8 A
24V DC version ......................................... 3.1 A
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