ENGINE

GOVERNING

SYSTEM

ADB120E4 Electric Actuator

with Fuel Metering Valve

Governors America Corp., 720 Silver Street Agawam, MA 01001phone: 413.786.5600 fax: 413.789.7736

www.governors-america.cominfo@governors-america.com

1

• EasyInstallation

• PreciseEngineSpeedControl

• MultiVoltageUsage

• ProvenReliability

• MaintenanceFree

• RapidResponsetoTransientConditions

• Enhance’sEnginePerformance

• CompactSize

INTRODUCTION

The ADB120E4 from GAC, is a linear, proportional, electric fuel metering servo for use on Cummins engines with PT fuel systems. The actuator is energized by signals from a speed control unit and is capable of delivering fuel at rates up to 1700 Ibs./hr.

DESCRIPTION

The Actuator is an electromagnetic servo device which can be integrated into a closed loop control system. An engine control system can be described as follows: An electrical signal is generated by a magnetic speed sensor which is proportional to engine speed. This signal is sent to the electronic speed control unit which compares it to the preset engine speed setting. If the magnetic speed sensor signal and the preset engine speed setting are not equal, a change in current from the speed control unit to the actuator will change the magnetic force in the actuator. The rotation of the actuator shaft will then adjust the fuel to the engine to cause the engine speed to be equal to the preset engine speed setting. Shaft rotation is proportional to the amount of the actuator current and is counter balanced by the internal spring. Since the design is totally sealed, outstanding reliability is achieved. A single compression spring is used to improve reliability. No maintenance is required.

ISO 9001CERTIFIED

OVERNORS

MERICA

ORP.CAG

®

PerformanceTorque...............................................................................1.1 lbs./ft.Operating Stroke.......................................................25 +/ 1 DegreeResponse Time (10-90% 2-19mm)....................................30 MSEC

Electrical Power InputOperating Voltage.................................................12, 24, or 32 VDCNominal Operating Current..................................2 Amps at 12 VDC............................................................................1 Amps at 12 VDCMaximum Current/Continuously Rated................6 Amps at 12 VDC.......................................................................3 Amps at 24/32 VDC

EnvironmentalTemperature Range..........................-40° to +200°F (-40° to +95°C)Relative Humidity............................................................Up to 100%All Surface Finishes..............Fungus Proof and Corrosion Resistant

PhysicalDimensions...............................................................See Diagram 1Weight....................................................................4.75 lbs. (2.2 kg)Mounting..................................Vertical/Electrical Connector on Top

ReliabilityVibration......................................................Up to 20G & 50-500 HzTesting.........................................................................100% Tested

SPECIFICATIONS

This document is subject to change without notice. Caution: None of GAC products are flight certified controls including this item.

2PTI 2011 A

DIAGRAM 1 OUTLINES

DRAIN

IN

OUT

ELECTRIC ACTUATOR

ADB120E4S/N :MODEL:

GACOVERNORS

MERICA

ORP.

MADE IN AGAWAM, MA U.S.A.

2.38

3.63

0.94

4.00

.28 dia.

0.86

2.75

(21,6)

(69,8)

0.73(18,5)

4.13(104,8)

(101,6)

(23,8)

(59,7)

6.98(177,3)

(92,1)

(7,1)

This document is subject to change without notice. Caution: None of GAC products are flight certified controls including this item.

3PTI 2080 I