electronically controlled hydrostatic transmissionseaton vickers electro-hydraulic hydrostatic...

Electronically Controlled

Hydrostatic Transmissions

Product Focus For Mobile Applications

EATON Vickers Electro-hydraulic Hydrostatic Transmission System M-SYEH-MR001-E March 20032

A fully integrated, electro-hydraulic system means atotal solution for you.Working with a team ofPlatform Specialists andSystem Engineers, whofully understand your vehi-cle and what it needs todo, we’ll help you config-ure the right mix of prod-ucts for your application.Then we’ll work with you

to fine-tune a systemthat’s tailored for yourneeds.

The brain of the system isthe Maestro ElectronicControl Module. This unitcan be configured, bymeans of software, to per-form a wide range of func-tions.

If you need a hydrostatic transmission to propel

your vehicle, let Eaton do the driving.

Eaton Hydraulics: Your Single Source forElectronically Controlled HydrostaticTransmissions for a Range ofPlatforms.

You’ve purchased EatonHydraulics pumps,motors, steeringunits and valves inthe past becauseyou need rugged,dependable perform-ance for your mobilehydraulics applications. Now,add the benefits of precision elec-tronic controls to your list of rea-sons for buying from Eaton. You’ll getsmoother power transmission, more accuratespeed control, and more reliable performance, whenyou include a fully integrated electro-hydraulic sys-tem from Eaton into your vehicle.

Electro-hydraulicHydrostaticTransmissionSystems

The Graphical UserInterface (GUI) walks thesystem engineer throughthe tuning process, usingreal-time graphical feed-back to clearly indicate thesystem’s response to eachparameter change. Youdefine the performancecharacteristics that giveyour vehicle it’s competi-tive advantage.

This brochure illustrates afew examples of how yourvehicle performance andreliability can be improvedwith an Eaton electro-hydraulic control system..

Get the benefits of preci-sion electronic controlsfrom Eaton on your nextvehicle redesign project.

Electro-hydraulic Transmission Systems . . . . . . . . . . . . . . 2

Displacement Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Electronic Transmission Automotive Control . . . . . . . . . . 4

Dual Path Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

DrumMaster™ Electronic Control and Constant Speed Control . . . . . . . . . . . . . . . . . . . . . . . 6

Engineered Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

EATON Vickers Electro-hydraulic Hydrostatic Transmission System M-SYEH-MR001-E March 2003 3

Key Platforms

• Utility Tractors

• Turf Care Vehicles

• Municipal Utility Vehicles

DisplacementControl

System Integration

• The mechanical couplingof the variable pistonpump and motor pro-vides a compact packagewith fewer leak paths.

• Fewer hose connectionsreduce assembly time.

• A small envelope allowsdesign flexibility.

• Modular constructioneases fit-up to your vehicle.

• Noise and vibrations arereduced with “Drive-by-wire” rather thanmechanical linkages.

Programmable VehicleControl

• Joystick or foot pedalcommand transfer func-tions are easily tuned toyour specifications toprovide aggressive ormild vehicle acceleration.

• Dynamic hydrostaticbraking can be adjustedto provide a more abruptor a smoother responseto operator input.

Optional Control SystemUpgrades

• Electronic cruise controlcan be added to yourelectro-hydraulicCompact Z Transmissionsystem for greater operator comfort and productivity.

• Programmable anti-stallprevents engine stallingby de-stroking the pump.

Maestro, combinedwith the Eaton CompactZ Transmission providesa hydrostatic propul-sion package that’s ide-ally suited for compactutility tractors andother small- to medi-um-sized vehiclesunder 40 Horsepower.

A properly equipped Compact Z Transmission,fitted with electronicswashplate positionfeedback sensor andsolenoid swashplateactuation, is a smooth-running electro-hydraulic propulsionsystem giving your

vehicle increased con-trol, with dynamichydrostatic braking.

Forward/ReverseTravel

Cruise,Forward, Neutral

and ReverseSwitches

Laptop

Compact Z Transmission

Engine

MaestroElectronicController

Applicationsoftware

Solenoid ControlSwashplatewith ElectronicPosition Sensor

©2002 Eaton Corporation. All rights reseved. www.eatonhydraulics.com

ApplicationSoftwareMAY 2003

Other information6 pt Universe 57Condensed(6.5 leading, space after: 3pt)

Hydraulics


ElectronicTransmissionAutomotiveControl (ETAC™)

The Maestro controlleris integrated with theengine throttle manage-ment system as well asthe closed circuit pump.It drives high perform-ance proportional pumpactuators and uses elec-tronic swashplate feed-back to provide precise,dynamic system control.

ETAC™

• Tailored performanceimproves productivityover a wide range ofoperator skill levels.

• ETAC™ matches enginepower to the workrequirement, for quieteroperation and reducedfuel consumption.

• Inching function maxi-mizes productivity byallowing smoother, moremanageable operation ofwork hydraulics.

• The anti-stall featureenables maximum use ofavailable engine power.

Inchingpedal

Cruise,Forward, Neutral,

Reverse Switches

Laptop


Axial Piston Motor

Series 2 Variable Piston Pump




Engine

Applicationsoftware

Solenoid ControlElectronic Swashplatewith Position Sensor

Travelpedal

ThrottlePositionSensor

Speed Sensor

Optional ControlSystem Upgrades

Cruise Control

• Maintains consistentworking speed so theoperator can focus onwork quality.

• Reduces operatorfatigue.

• Adjusts and controlsvehicle speed in discretesteps.

Motor Shift (2-speed)

• Expands power andspeed range with inte-grated motor control.

• Choose between auto-matic or operator selec-table operation.

Key Platforms

• Wheel Loaders

• Fork Lift Trucks

• Telehandlers

• Street Sweepers


Dual AxisElectronicJoystick

Laptop


Tandem Model 72400Medium Duty Servo Pump

VISMotor

Electronic SolenoidControl with Swashplate

Position Sensor

VISMotor




Engine

Applicationsoftware

Maestro is an ideal elec-tronic controller for dualpath hydrostatic propul-sion systems on skidsteer and tracked vehi-cles. Like the Compact ZTransmission and HeavyDuty Series 2 servopumps, the TandemModel 72400 Medium

Duty Servo Pump can befitted with dual electron-ic swashplate positionfeedback sensor andsolenoid swashplateactuation. This systemmatches the perform-ance of independentpropulsion systems. Italso provides the indus-

try’s leading straight-linetracking, slow speed sta-bility and smooth turn-ing performance.

System Integration

• The easy installation ofdrive-by-wire systemsallows for flexibility invehicle design.

• Vibration, noise, and theneed for cumbersomeadjustment of mechanicallinkages are eliminated.

Electronic Control

• Precision control of inde-pendent propulsion sys-tems eliminates uncom-manded vehicle spin andallows accurate slowspeed maneuverability.

• Near-zero hysteresis pro-vides accurate vehicleresponse to joystickpropulsion and steeringcommand inputs.

• Programmability allowstuning of performanceparameters for both theinexperienced rental market user and theexpert user.

• CAN-bus interface pro-vides communicationbetween the vehiclemaster controller, andoperator interfacedevices such as displays,engine controller andsensors.

Dual PathControl

Key Platforms

• Skid Steer Loaders

• Windrowers

• Tracked Vehicles


DrumMaster™ElectronicControl andConstant SpeedDrive

Closed-loop electronicdrum speed control,independent of enginespeed, for your transitmixer is easy withDrumMaster™.Consistent concrete mixquality becomes rou-tine. Constant speedcontrol during transport

increases drum mainte-nance intervals as wellas improving vehicledriving dynamics.Precise discharge speedcontrol through push-button operationimproves work qualityand productivity. CAN-bus interface

allows integration ofdrum speed sensor toother on-board electron-ics, such as speed androtation counter dis-plays, or GPS systems,allowing maintenanceon an as-needed basis.

Maestro ElectronicController

ApplicationSoftware

Axial Piston Motor

MotorSpeed Sensor

Series 1 Variable Piston Pump

Electronic Proportional Control with MechanicalSwashplate Feedback Linkage

Engine

Laptop




Hydraulics

OperatorPendant

OperatorControl Panel

Electronic Control

• Cables subjected to cor-rosive conditions, areeliminated.

• The discharge rate can bemore easily modulatedfor more accurate place-ment of material.

• DrumMaster™ reduceswear and tear on the

drum drive gearbox andtruck chassis components.

• Drum rotation directionindicator light outputreduces operator dis-charge errors.

• Manual override capabili-ty is always available.

Transport Drum SpeedControl

• Constant, slow rate drumspeed control reducestotal drum revolutions,increasing drum life andproviding better controlof concrete consistency.

• The need for operatormonitoring and adjust-ment of drum speed areeliminated.

• The demand placed onengine power by thehydraulic pump is notincreased during acceler-ation, improving vehicleperformance and fuelefficiency.

Other Speed ControlApplications

• Concrete Transit Mixers

• Tub Grinders

• Trenchers


EngineeredSystemsTailored for your needs

Electro-hydraulic Steer ByWire (EH-SBW)

EH-SBW is a new technolo-gy steering system for vehi-cles where an electronicsensor replaces the rotarysteering valve of a tradition-al hydraulic steering sys-tem. An electrical signal,rather than mechanical orfluid connections, transfersthe steering commandfrom the operator’s steeringwheel to the steered wheelelectro-hydraulic actuator.The Eaton system includesa novel tactile feedbackdevice at the steeringwheel that simulates thefeel of conventional hydro-static steering.

Electro-hydraulic WorkCircuits

An electronic remote con-trol joystick replaces thehydraulic remote control,cables and levers of a tradi-tional work circuit operatorinterface. An electrical sig-nal, rather than mechanicalor fluid connections, trans-fers the boom, bucket orimplement command fromthe operator’s joystick to anelectro-hydraulic directionalcontrol valve. Other workcircuit applications includecontrol of auxiliary motors,power take-off clutches,and transmissions.

Electro-hydraulic FanDrive System

Electronically controlledhydraulic fan drive systemsfrom Eaton provide fast,quiet, efficient cooling forengine coolant, hydraulicfluid, charge air and entireengine compartments. Theelectronic controllerreceives a cooling demandsignal from either theengine control module ortemperature sensors.Adjustable ramps providesmooth fan speed transi-tions, reducing noise andshock to power take-offcouplings.

Other Electro-hydraulicsystems for steering,work circuit and fan driveapplications.

World Class Brands,Products and Systems

Additional Benefits:

• 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 controlis more accurate and stable.

• Hydraulic noise and leaksin the cab are reduced.

• Hydraulic connectionsare eliminated or simplified.

• Vehicle energy manage-ment is improved.


• Installation is flexible foroptimum fan location.

• Emissions are reducedand fuel economy isimproved.

• The power available tothe drive wheels isincreased.

• Choose from efficientvariable or cost-effectivefixed displacement sys-tems.

Eaton Corporation is a global diversified industrialmanufacturer. 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

Bus with Fan Drive System

© 2003 Eaton CorporationAll Rights ReservedPrinted in USADocument No. M-SYEH-MR001-EMarch 2003

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

Eaton20 Rosamond RoadFootscrayVictoria 3011AustraliaTel: (61) 3 9319 8222Fax: (61) 3 9318 5714

EatonEaton Fluid Power GmbHDr.-Reckeweg-Str. 1D-76532 Baden-Baden, GermanyTel: +49 (0) 7221 682-0Fax: +49 (0) 7221 682-788

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