ATB Series Integral Throttle Body Actuators

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Governors America Corp. © 2020 Copyright All Rights ReservedATB Series Integral Throttle Actuator 3-2020-K1 PIB 2080

ATB SeriesIntegral Throttle Body Actuators

1 InTroducTIonThe ATB Series integral throttle body electric actuators are designed to control the air or air/fuel mixture to a gas or gaseous-fueled engine. They are typically used to control an engine by working in tandem with a con-ventional fuel mixer. • Cost-effective,maintenance-free,compactdesign• Rapid response to transient load condition• Sealed to 5.0 bar• Mountsinanyposition;nomechanicallinkage,nomountingbrack-

ets• Flexibledesignforengine,manifold,andfuelmixerconsiderations• Idle and max adjustment screws• Optional high temperature and corrosive environmental conditions

ATB401T1F-24 ATB652T2N14-12

ATB552T2N14-24

SAMPLE ATB CONFIGURATIONS

ATB85T4F14-24

2 confIgurATIon nomenclATure

SUFFIX DEFINITION1 4 HighTemperature,Sealed

2 MechanicalPositionindicator,Sealed(Onlyavailablewithnon-high-tempversion,T2unitsonly)

F FeedbackPositionSensor,SealedN Normal(ComeswithnoFeedbackPositionSensor),Sealed

PART NO. SYMBOL(S) DEFINITION

ATB452T2N-12 N Does not include Feedback Position Sensor. Sealed to 5.0 Bar.

ATB452T2N2-12 N,2Does not include Feedback Position Sensor,buthasamechanicalpositionindicator. Sealed to 5.0 Bar

ATB753T3F14-24 F,1,4IncludesFeedbackPositionSensor,hightemperaturerated,sealedto5.0Bar internally.

Examples:

AvAILABLE BORE SIzES BY FAMILY BORE DIAMETERS FAMILY

25,30,35,40 T145,55,65 T275,85,95 T4

• All gaseous fueled engines need a positive fuel lockout that should be of the electrical variety.

• Throttle bodies will operate without electrical power. • Gaseous fueled engines will retain unburnt fuel internally especially propane.

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3 ATB SIZIng mATrIX

INDUSTRIAL ENGINE APPLICATIONS / 4 CYCLE / NATURAL GAS / STOIChIOMETRIC FA MIXTURE

The following matrix matches the Engine size and RPMs to the ATB bore size. This chart is for reference only and were derived from aver-agingmaximumvelocitymethodandcapacityindexmethodat75%butterflytravelposition.Finalsizingmaydifferdependingonapplication.See your GAC representative for more information.

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PERFORMANCEMaximum Throttle Plate Rotation 65°±1°Response 10-90%<35ms

POWER INPUT for T1 - 25 mm to 40 mm Bore SizeOperating Voltage 12 or 24 V DC Normal Operating Current 3.0 A at 12 V DC

1.5 A at 24 V DCMaximum Current 6.0Aat12VDC

3.0 A at 24 V DCCoilResistance(RedtoWhite12VDC)(RedtoWhite24VDC)

2.2Ω8.6Ω

Red to Housing >5MΩPOWER INPUT for T2 - 45 mm to 65 mm Bore Size

Operating Voltage 12 or 24 V DC Normal Operating Current 6.0Aat12VDC

3.0 A at 24 V DCMaximum Current 9.0Aat12VDC

4.5 A at 24 V DCCoilResistance(RedtoWhite12VDC)(RedtoWhite24VDC)

1.4Ω5.3Ω

Red to Housing >5MΩPOWER INPUT for T3 - 75 mm Bore Size

Operating Voltage 12 or 24 V DC Normal Operating Current 3.0 A at 12 V DC

1.5 A at 24 V DCMaximum Current 12.0 A at 12 V DC

6.0Aat24VDCCoilResistance(RedtoWhite12VDC)(RedtoWhite24VDC)

0.9Ω3.3Ω

Red to Housing >5MΩPOWER INPUT for T4 - 75 mm to 95 mm Bore Size

Operating Voltage 24 V DC Normal Operating Current 6.5Aat24VDCMaximum Current 10.0 A at 24 V DCCoilResistance(A-D24VDC) 2.5ΩA to Housing >5MΩ

ENvIRONMENTNormal Ambient Operating Temperature Range -40°Fto+200°F(-40°Cto+9

5°C)High Temperature Ambient Operating Temperature Range

-40°Fto+250°F(-40°Cto+125°C)

Relative Humidity SAEJ1455Salt Spray ASTMB117-97All Surface Finished Fungus & Corrosion ResistantMaximumPressure,All Units Are Sealed 5.0 Bar

RELIABILITYVibration ±4g,25to100HzShock 20g,11msTesting 100% Functionality Tested

Rated Life >40 Million CyclesAGENCY COMPLIANCE

CE Compliant Stationary Industrial Markets Only

PhYSICALDimensions See Section 5Weight(T1) 3.0lb(1.36kg)

(T2) 6.0lb(2.72kg)

(T3) 17.6lb(7.89kg)

(T4) 15.0lb(6.80kg)WIRING hARNESS

T1/T2/T3(Packard)Cable Harness CH1215

T4(MIL)CableHarnessMating Connector

CH1203,CH1210,orCH1212EC1000(Straight)or

EC1010(90°)MILFEEDBACK SENSOR WIRING

T2/T3 CH1515(Harness)&EC1515(MatingConnector)

T1/T4 CH1243(Harness)&EC1523(MatingConnector)

SPecIfIcATIonS4

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5 ouTlIne dIAgrAm

MIN THROTTLE

AVAILABLE BORE SIZES:

134.85.31

175.76.92

FEEDBACK

OPTIONAL COVER AND CONNECTOR USED WITH

FEEDBACK

T1 SERIES

MIN THROTTLE


134.85.31

175.76.92

FEEDBACK


FEEDBACK

MIN THROTTLE


134.85.31

175.76.92

FEEDBACK


FEEDBACK

2.3860.3

2.8873.0

2.8873.0

2.3860.3

3.5690.5

AVAILABLE BORE SIZES:45, 55, 65 MM

4.56115.9

3.7695.4

2.9474.7

.4812.3

.236.0

.317.9

9.69STANDARD UNIT

246.1

3.7595.3

9.95HIGH TEMP UNIT

252.8

COVER NOT SHOWN

ANGLE ADJUSTMENT MIN THROTTLE

ANGLE ADJUSTMENT

FLOW DIRECTION

3.1279.2

8.08205.2

OPTIONAL HIGH TEMP

ATB Models with Mechanical Position Indicator

Side

T2 SERIES

2.3860.3

2.8873.0

2.8873.0

2.3860.3

3.5690.5


4.56115.9

3.7695.4

2.9474.7

.4812.3

.236.0

.317.9

9.69STANDARD UNIT

246.1

3.7595.3

9.95HIGH TEMP UNIT

252.8

COVER NOT SHOWN


ANGLE ADJUSTMENT

FLOW DIRECTION

3.1279.2

8.08205.2

OPTIONAL HIGH TEMP

2.3860.3

2.8873.0

2.8873.0

2.3860.3

3.5690.5


4.56115.9

3.7695.4

2.9474.7

.4812.3

.236.0

.317.9

9.69STANDARD UNIT

246.1

3.7595.3

9.95HIGH TEMP UNIT

252.8

COVER NOT SHOWN


ANGLE ADJUSTMENT

FLOW DIRECTION

3.1279.2

8.08205.2

OPTIONAL HIGH TEMP

Front

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AllATBswith75,85and95mmboresizes,havemountingholes. The diameter of each mounting hole is Dimension F

and the distance between mounting holes is Dimension D.

NOTE

D

308.612.15

90.53.56

102.94.05 MAX THROTTLE

ADJUSTMENT

MIN THROTTLE ADJUSTMENT

162.26.39

86.43.40

AVAILABLE BORE SIZES:75, 85, 95, 110, 120 mm

MILITARY CONNECTORDim. Bore Size 85/95 110/120

A 11.35 12.15 [288.3] [308.6]

B [ 166.7] [189.2]

C 5.25 6.39 [133.4] [162.2]

D 3.75 5.05 [95.2] [128.3]

E N/A 4.45 [113.0]

F R= 0.41 0.42 [10.5] [10.8]

6.56 7.45

A

B

C

D

E

E

F

DIMENSION BORE SIzE75/95

A [288.3]11.35

B [166.7]6.56

C [133.4]5.25

D [95.2]3.75

E N/A

F [10.5] Ø 0.41

T4 SERIES

D

308.612.15

90.53.56


ADJUSTMENT


162.26.39

86.43.40



A 11.35 12.15 [288.3] [308.6]

B [ 166.7] [189.2]

C 5.25 6.39 [133.4] [162.2]

D 3.75 5.05 [95.2] [128.3]

E N/A 4.45 [113.0]

F R= 0.41 0.42 [10.5] [10.8]

6.56 7.45

A

B

C

D

E

E

F

D

308.612.15

90.53.56


ADJUSTMENT


162.26.39

86.43.40



A 11.35 12.15 [288.3] [308.6]

B [ 166.7] [189.2]

C 5.25 6.39 [133.4] [162.2]

D 3.75 5.05 [95.2] [128.3]

E N/A 4.45 [113.0]

F R= 0.41 0.42 [10.5] [10.8]

6.56 7.45

A

B

C

D

E

E

F

5 ouTlIne dIAgrAm (conTInued)

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6 InSTAllATIonThe actuator is mounted rigidly between the engine’s intake manifold and the gas mixer. The preferred mounting orientation for the ATB Se-ries is with the throttle shaft parallel to the engine crank shaft. Normal vibrationfromtheenginewillnotaffecttheoperationoftheactuator.

TheATBSeriesisdesignedtoprovideanexactfittothevariousman-ifolds and mixers available. Section 5 OUTLINE DIAGRAM shows prop-er sizing of the ATB to the engine for envelope concerns.

NOTE

7 WIrIngAll throttle body actuators are prewired for either 12 or 24 V DC systems. Use the included wiring harness to connect the actuator to the speed controlunit’soutputterminals.Priortoconnectingtheactuatorcable,twistitsothatthereisaboutonecompletetwistper1.0in[25.4mm]alongtheentirelengthofthecable.ThiswillsubstantiallyreduceEMIeffectsonthecontrolsystem.ForapplicationswhereEMIisstillaconcern,shielded cable for the actuator is recommended.

Packard Connector(T1, T2 &T3)

MIL Connector(ATB T4)

AB

CD

E

F

to Actuator Terminal “A”on Speed Control Unit

to Actuator Terminal “B”on Speed Control Unit

hARNESSPIN SIGNAL1 +5V2 GND4 OUT

hARNESSPIN SIGNALA +5VB GNDC OUT

AB

CD

F

E

ToControl Unit

12 VOLT OPERATIONA TO CB TO DA AND D TO ACTUATOR TERMINALS OF SPEED CONTROL UNIT

ACB295C & ACB295H WIRING

AB

CD

F

ETo

Control Unit

24 VOLT OPERATIONB TO CA AND D TO ACTUATOR TERMINALS

AB

C

D

F

E

TO SPEED CONTROL UNIT“ACTUATOR” TERMINALS

TO SPEED CONTROL UNIT“POSITION SENSOR” TERMINALS

ACB295F-24 WIRING

ACE275K WIRING

Harness

FEEDBACK SENSOR(Female Receptacle)(ATB T2 &T3)

Mating ConnectorEC1523

Mating ConnectorEC1515

A B C

(ATB T1 & T4)

The Position Feedback Sensor is installed and preset at no fuel (0%)at1.0Voutput.Maximumopening (100%)at65°is3.8V.

NOTE

POSITION FEEDBACK SENSOR

A B

Naturally Aspirated Engines Turbocharged-Intercooled Engines

Engine

ATB

Speed Control

Exhaust

Air�lter

Gas

Ring Gear

Engine

ATB

Turbocharger

Exhaust

Mixer

Air�lter

Gas

Intercooler

Ring Gear

Speed Control

A Gaseous Fuel Shut-Off Valve, Independent of theThrottleBodyActuator,ShouldBeProvidedtoPreventLoss of Engine Control or Propagation of a Hazardous Flammable Condition Which May Cause Personal Inju-ry or Equipment Damage.

Anoverspeedshutdowndevice,independentofthegovernorsystem,shouldbeprovidedtopreventlossofenginecontrol,whichmaycausepersonalinjury.

The arrow on the side of the ATB represents thedirectionofflow.

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8 ThroTTle AdjuSTmenTAnadjustableIdleStopsetscrew(MinThrottleAdjustment)isprovidedtosetafixedfuelopeningifdesired.BelowrepresentswheretogenerallyfindtheadjustmentscrewsoneachATBmodel.

Typically,theenginespeedshouldbesetbyunpluggingtheactuatorpowertothegovernororbyturningoffthegovernorpoweroncetheengine is running and then setting the engine speed to the desired setting.

MaxthrottleStopispresetto65degreesfromfactory.

MAX THROTTLE

MIN THROTTLE

2X

21

FULL RADIUS

FULL RADIUS

21

2X

FULL RADIUS

Idle Stop Adjustment

1. Usinga2.5mmHexwrench,youmustcompletelyremovethefirst locking setscrew. This gives you access to the inner idle setscrew.

2. UsingthesameHexwrench,turnthewrenchclockwisetoincreasethefixedthrottleopening,orcounterclockwiseto decrease.

3. AfteradjustingtheIdlesetscrew,insertthesealingscrewandtightentosnugplus¼turn.ApplyLocite518orequiva-lent.

NOTE

9 TrouBleShooTIngIfthegovernorsystemfailstooperate,performthefollowingtest.Thistestisonlytoensurethatthereisnoobstruction,wirebreakageormetal-on-metal contact inside the throttle body.

1. Shutenginedown,disconnecttheactuatorcableandmeasuretheresistanceattheactuatorconnector.2. Check resistance from each wire to the actuator housing and compare readings to values shown in Resistance Measurement table

below.Iftheresistancevaluesdifferfromvaluesshown,theactuatorisdefective.3. Reconnect the actuator cable. 4. Energizetheactuatortofullfuel(followstepsinthespeedcontrolpublication).Thethrottleplateshouldmovefullyopen.5. Rotate the throttle plate to determine if the plate moves smoothly without binding or sticking.

Measure the resistance from:

RESISTANCE MEASUREMENTMeasure the resistance from:T1 Coil Resistance (±10%)

RedtoWhite(12VDC)RedtoWhite(24VDC)

2.2Ω8.6Ω

T2 Coil Resistance (±10%)RedtoWhite(12VDC)RedtoWhite(24VDC)

1.4Ω5.3Ω

T3 Coil Resistance (±10%)RedtoWhite(12VDC)RedtoWhite(24VDC)

0.9Ω3.3Ω

T4 Coil Resistance (±10%)A-D(24VDC) 2.5Ω

T1, T2, & T4 (±10%)Red(orA)toActuatorHousing >5MΩ

ATB Series Integral Throttle Body Actuators

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