Electro-hydraulic Fan Drive System - Associated Groups · Electro-hydraulic Fan Drive System ... Electro-hydraulic Fan Drive ... Power Steering Power Steering Amplifier Digital Input

Electro-hydraulic Fan Drive System

Efficient cooling power,where you need it.Complete Fan Drive Systems from Eaton®

EATON Electro-hydraulic Fan Drive System Marketing Brochure E-SYFD-MR001-E2 September 20052

Table ofContents

General

Complete Fan Drive Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Electronic Controller Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Fan Drive System Pump and Motor Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Hydraulic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Integrated Fan Drive System, Fixed-displacement Pump . . . . . . . . . . . . . . . . . . . . . . . .8

Stand-Alone Fan Drive System, Variable-displacement Pump . . . . . . . . . . . . . . . . . . . .9

Areas of Application and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Engineered Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Eaton® Corporation is aglobal $9.8 billion diver-sified industrial manu-facturer that is a leaderin fluid power systems; electrical power quality,distribution and control;

automotive engine airmanagement and fueleconomy; and intelligenttruck systems for fueleconomy and safety.

Eaton has 56,000employees and sellsproducts in more than125 countries. For moreinformation, visitwww.eaton.com

Information contained in this document is subject to change without notice. Performance values are typical values. Customers are responsible for selectingproducts for their applications using normal engineering methods.


The Electro-hydraulic(EH) Fan Drive Systemcools your engine andvehicle sub-systems bycontrolling a hydraulicpump and motor with a digitally program-mable controller.

The EH Fan DriveSystem equipped withthe Two ChannelAmplifier offers fast,quiet and efficient cool-ing for engine coolant,hydraulic fluid, chargeair and entire enginecompartment.

Electro-hydraulic Fan Drivebenefits include:

• Flexible installation for optimum fan location

• Elimination of belt maintenance

• More accurate control of charge air temperaturecan help reduce engineemissions

• Improvement in fuel economy

• Increased power output• Choice of variable- or fixed-

displacement systems

Eaton® can be your single source for fan drive systems.

Eaton Fan Drive Systems caninclude:• Pump (fixed- or

variable-displacement)• Motor• Valves & manifold• Electronic controls• Compact patented

reservoir• Filter• Hoses and fittings

A fully integratedelectronically controlledEaton Hydraulic Fan DriveSystem delivers a compre-hensive cooling solution withcomplete controllability.

Areas of application:

On-highway vehicles• Buses• Recreational vehicles

Construction machinery• Excavators• Loaders• Cranes• Forklifts

Agriculture machinery• Tractors• Forest machinery

Eaton®

Hydraulics Complete FanDrive Systems

3


ElectronicControllerOptions

Electronic Controllers The electronic controllerused for a Fan Drive Systemis called the Two ChannelAmplifier (TCA).

The TCA at the heart of the EH Fan Drive System, is arugged, fully encapsulated digitally programmablecontroller specially designedfor mobile environments.

It is prepared for CANbuscommunications on a vehiclenetwork. Software forcontrolling the EH Fan DriveSystem is loaded in thecontroller memory at thefactory. Control softwareparameters are adjusted via RS 232 hook-up to alaptop computer.

The TCA controller isavailable for both 12 V or 24 V vehicle powersystems. With 5 configurableinputs and 2 Pulse WidthModulated (PWM) outputs,the TCA can interface with a variety of systemcomponents and drive up totwo electro-hydraulic valves.

Two Channel Amplifier (TCA)

Fan Drive Configuration Power Requirement

• 12 VDC or 24 VDC

Laptop or PCCommunication

• RS232 for communicationwith GUI

Inputs

• 5 user configurable inputs

- 2 Thermistor inputs

- 2 Digital or Switch inputs

- 1 Engine Control Modulecooling command voltagesignal

Or• Optional CANbus signal

Outputs

• 1 PWM current controlleddriver for proportional flow control

• 1 on-off driver for fan off or fan reverse

Mechanical

• Polymer enclosure• Fully encapsulated

electronics• Flying lead harness with

10-pin MetriPak connector• 2 Mounting flanges:

#8 fasteners• 1 dual color LED for

status and diagnosis

Environment

• Operating temperature: -40°C to +85°C

• Meets EMC standards off-road vehicle

• Reverse battery and loaddump protection

• Input/output short circuitprotection

• UV resistant• Water: temporary

immersion• Random vibration 5.8 Grms• Shock: 50 G

EATON Electro-hydraulic Fan Drive System Marketing Brochure E-SYFD-MR001-E2 September 2005 5

Two Methods of Control

1. Integrated Fan DriveSystem

Interface the Fan DriveSystem to your enginecontrol module to executethe cooling strategy exactlyas directed by the enginecontrol module.

2. Stand-alone Fan DriveSystem

Define your own coolinglogic using up to twotemperature sensors andtwo digital switch inputs. We will implement thatcontrol through the TCA.

By adding electronics to anEaton® Electro-hydraulic FanDrive System, users cantailor the system to theirneeds. Fan drive controlparameters are adjustedthrough a user-friendlygraphical user interface(GUI).

The GUI walks the designerthrough the definitionprocess with real-timegraphical feedback to clearly indicate the system’sresponse to eachmodification.

System data can also begraphically monitored and

saved to verify actualresults. When the coolinglogic is fully defined,resulting parameters aresaved and used forexact systemduplication for yourproduction application.

Setup Screen

The Setup Screen feature allows the user to define hisown cooling logic by setting in the required parameters.

Monitor Screen

The Monitor Screen allows the user to monitor the system.

Component Screen

The Component Screen gives the user an overview ofthe system and allows the user to click on the compo-nents and enter a description.


Fan Drive SystemPump and MotorGuide

• 13-tooth gear designreduces flow-pressure rip-ple, noise, and vibration.

• Various shaft and portingoptions allow design flexibility.

• Tandem and multi-sectionpump options minimize circuit cost.

• Compact envelope designreduces space required forinstallation.

• Integrated motor and valve manifold optionsreduce fluid leak risks,space requirements, andsystem costs.

Eaton Piston Pumps

• Versatile design includessingle pumps, through-drive arrangements, and avariety of drive shaft andcontrol options; adapts tomany applications, provid-ing cost-effective variable-pump installation.

• Proven componentsensure longer life at the

higher performance levelsof power-dense machinery.

• Compact housing and lightweight design allowsbetter access for installa-tion and servicing.

• Heavy-duty bearing andshafts reduce internaldeflections and wear, pro-viding longer life and opera-tion time.

• Designed for maximumefficiency, directs moreflow and input energy tothe work, not to heat and waste.

Eaton Piston Motors

• Compact design reducesspace required for installation.

• Lightweight durable housing minimizes system mass.

• Numerous shaft and port-ing options provide designversatility.

• Bi-directional rotation allowsreversal of fan direction.

• Integral speed sensor available to provide option-al closed-loop control offan speed.

• Fine tolerances reduceleakage and increase system efficiency.

• Low start-up torquerequires less pressurebuild-up for operation.

Eaton Vane Pumps

• Hydraulically balanceddesign increases the operating life of the bush-ing/bearing by eliminatingside loads.

• Consistent efficiency overlife is achieved by self-com-pensation of vane wear.

• Quieter operation as compared to a gear pump.

• Integrated pressure compensated flow controlensures priority and constant flow regulation.

• Compact common inletwith double pump configu-ration allows versatility in

application. One can beused for steering and theother for fan drive.

• Flexible port orientationallows easy installation and prevents hose bends.

• Vane pumps are the mostcommonly adopted steering pump in on-highway vehicles.

Eaton Vane Motors

• Lower starting torque as compared to gear andpiston motors.

• Smoother operation withlesser jerks as comparedto gear motors.

• Excellent capability to handle pressure shocks.

• Better efficiency at lowRPM.

• No back pressure require-ments as opposed tothose in piston motors.

• Quieter operation withrespect to gear and pistonmotors.

Pumps

Fixed Displacement Pump

Eaton Gear Pump 26000Eaton Gear Pump 25500Vickers V10 Vane PumpVickers V20 Vane Pump

6.6 - 30.6 cc21.3 - 55.2 cc

3.3 - 22.8 cc

Variable Displacement Pump

Vickers Piston PVEEaton Piston 420Vickers Piston PVH

25.2 41 45.1 cc41.0 49.2 62.3 cc

57.4 73.7 98.3 131.1 cc

Motors

Fixed Displacement Motor

Eaton Gear 100 SeriesEaton Piston 74111Eaton Piston 74318Eaton Piston 74624Eaton HD PistonVickers M2U Vane MotorVickers 25 M Vane Motor

12.3 - 20.3 cc

82.6 cc

21.6 - 25.4 cc43.6 - 68.7 cc

54.4 - 105.5 cc

Power (HP) 5 10 15 20 25 30 35 40 45 50+

8.2 - 50 cc

32.9 - 49.2 cc

Eaton® Gear Pump and Motor

Features and Benefits

19.5 - 42.4 cc


HydraulicComponents

Gear Pump

• Fixed-displacement• 7-30 cc, 21-100 cc• 26000 Series,

25500 Series

Gear Motor

• Fixed-displacement• 50 cc• 100 Series

Piston Pump

• Variable-displacement• 25, 40, 45 cc• 420 Series

Piston Pump

• Variable-displacement• 18, 20, 45, 50 cc• PVM Series

Vane Motor

• 25, 35 lb.in/100 psi • 2000 psi continuous

pressure

Vane Pump

• Square pump displacement range

• 3.3 cc to 42.5 cc • 3000 psi continuous

pressure

Piston Motor

• Fixed-displacement• 12, 20 cc• 74100 Series

Piston Motor

• Fixed-displacement• 33, 49 cc• 74300 Series

Piston Motor

• Fixed-displacement• 83 cc• 74600 Series

Proportional Compensator

• Bolt-on electro-hydrauliccontrol element

• Piston pump fan drive control

STC®

• Snap-to-connect• Threadless connectors

Hose & Fittings

• Aeroquip

Filter

• Return-line filter• 57 L/min, 95 L/min,

227 L/min• OFRS 25

Reservoir

• Reduced size• 3L, 70 L/min• AGT Cyclone tank


Integrated Fan Drive SystemFixed-displacementPump

Motor

Filter

Fixed-displacement

Gear Pump

Reservoir

Reverse ActingProportional Valve

By-passValve

PowerSteeringPower

Steering

Amplifier

Digital Input 2Digital Input 1

ECM PWM Signal

Temp 1 (opt)Temp 2 (opt)

On-Off Valve (opt)

Current-controlled SignalTCA

The system cooling strategyis based on one ECM input, two Temperature Inputs and two Digital Inputs. In somecases, the ECM signal is too noisy or too weak tocontrol a hydraulic circuit. The TCA amplifies andconditions the ECM signal to be used on ahydraulic circuit.

A fixed displacement pumpfan drive system is suited fora smaller and simpler coolingsystem. A fixed displacementpump is unable to alter it’sdisplacement to slow the fanspeed with respect to thecooling demand. The excessflow generated by the pumpis returned to the tank, which

leads to generation of heatand energy losses.

Fixed displacement pumpsare best suited for Fan DriveSystems below 10 HP.


Fixed-displacement Pump


This system is similar to theFixed Displacement Pumpsystem. For engines notequipped with an ECM, thecooling strategy is based ona temperature sensor anddigital inputs to the TCA.

A variable displacementpump fan drive system is

suited for larger and morecomplex cooling systems. Avariable displacement pumpreduces the displacement tomatch the flow as per thecooling demand. This featureoffers on-going energysavings and creates lessheating of the hydraulic fluid.

Variable displacementpumps are best suited for Fan Drive Systems above 20 HP.

Variable-displacementPiston Pump

rAmplifier

Reverse ActingProportional

Valve

TCADigital Input 1

Temp 1

Digital Input 2

Temp 2

On-Off Valve (opt)

Current-controlled Signal

Motor

Filter

Reservoir

PowerSteeringPower

Steering


Variable-displacement Pump

Stand-Alone Fan Drive SystemVariable-displacement Pump


Areas ofApplication and BenefitsElectro-hydraulicFan Drive System

Benefits of Electronic Control

• Functions with EngineControl Module Input orVehicle Sensor and Switch Inputs:– Allows a wide variety of

configurations.

• Communications via RS 323 or CANbus link:– Provides versatility in

communications.

• Conditions engine controlmodule signal:– Filters noise, inverts

signal, and re-scales signalto optimize control.

• Uses closed-loop currentcontrol, instead of voltagecontrol:– Improves control accuracy

of fan speed by eliminatingtemperature effects on proportional valve coil.

Application Specific Benefits

Buses

• Modulates fan speed– Reduces operating power

and noise.

• Limits fan speed on start-up– Reduces fan power draw

on start-up.

• Increased fuel economy– Reduced fan power

requirements lead to better fuel economy.

Recreational Vehicles

• Ramps between fan speedsettings– Ensures gentle speed tran-

sitions and providessmooth operation.

• Reduces operation noise– Electronic control reduces

the noise of the fan andpump, providing better passenger comfort.

Wheel Loaders

• Encapsulated construction– Allows installation in more

exposed locations on thevehicle.

• Flexible installation– The electronic control of

the Fan Drive Systemallows flexible installationsfor optimum fan location.

• Fan reverse feature – Reverse fan operation facili-

tates removal of debrisfrom the vehicle radiator.

10


EngineeredSystemsTailored for your needs

Electro-hydraulic Steer ByWire (EH-SBW)

EH-SBW is a new technologysteering system for vehicleswhere an electronic sensorreplaces the rotary steeringvalve of a traditional hydraulicsteering system. An electricalsignal, rather than mechanicalor fluid connections, transfersthe steering command fromthe operator’s steering wheelto the steered wheel electro-hydraulic actuator. The Eatonsystem includes a noveltactile feedback device at thesteering wheel that simulatesthe feel of conventionalhydrostatic steering.

Electro-hydraulic WorkCircuits

An electronic remote controljoystick replaces thehydraulic remote control,cables and levers of atraditional work circuitoperator interface. Anelectrical signal, rather than mechanical or fluidconnections, transfers theboom, bucket or implementcommand from theoperator’s joystick to anelectro-hydraulic directionalcontrol valve. Other workcircuit applications includecontrol of auxiliary motors,power take-off clutches, and transmissions.

The Electronic TransmissionAutomotive Control (ETAC)

ETAC system is a hydrostaticpropulsion package ideallysuited for small to mediumsized fork lift trucks, tractorsand utility vehicles. ETACmatches engine power to thevehicle propulsion and workrequirement. The “Maestro”digital, programmablecontroller is integrated withthe throttle system as well asa closed circuit hydraulic pumpand motor. Maestro drives ahigh performance electro-hydraulic interface on thepump and uses a swashplatesensor to provide precise,closed loop control.

Additional Benefits:

• Consistent performance over a wide range of operating temperatures.

• Hydrostatic braking isadjustable through software.

• Inching function maximizesproductivity by allowing theoperator to regulate work circuit pump flow independ-ently of vehicle speed.

• Anti-stall enables use of available engine power byautomatically reducing pumpdisplacement.

• Adjustment of software parameters allows newoperators to operate the vehicle with the same productivity as skilled drivers.

Other electro-hydraulicsystems for steering,work circuit and fandrive applications.

World Class Brands,Products and Systems


• Hydraulic leaks and noiseare reduced.

• Assembly is simplified,providing greater cabdesign flexibility.

• Productivity, safety, andergonomics are allimproved.

• The tailoring of steeringcharacteristics by re-pro-gramming is simplified.


• The work circuit control is more accurate and stable.

• Hydraulic noise and leaksin the cab are reduced.

• Hydraulic connectionsare eliminated or simplified.

• Vehicle energy manage-ment is improved.

Eaton® Corporation is a global diversified industrial manufacturer. Eaton is a leader in:

• Fluid power systems• Electrical power quality, distribution and control• Automotive engine air management and fuel economy• Intelligent truck systems for fuel economy and safety

For more information, visit www.eaton.com.

Lift truck with steer by wire Electro-hydraulic work circuit Electronic Transmission Automotive Control

© 2005 Eaton CorporationAll Rights ReservedPrinted in USADocument No. E-SYFD-MR001-E2September 2005

Eaton14615 Lone Oak RoadEden Prairie, MN 55344USATel: 952 937-9800Fax: 952 974-7722www.hydraulics.eaton.com

Eaton11th Floor, Hong Kong New WorldTower300 Huai Hai Zhong Road Shanghai, 200021 ChinaTel: 86-21-6387-9988 Fax: 86-21-6335-3912

Eaton46 New Lane, HavantHampshire PO9 2NBEnglandTel: (44) 23 92 486 451Fax: (44) 23 92 487 110

Documents

Electro-hydraulic Fan Drive System - Associated Groups · Electro-hydraulic Fan Drive System ... Electro-hydraulic Fan Drive ... Power Steering Power Steering Amplifier Digital Input