iDM传动系统的架构与开发-2026

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iDM传动系统的架构与开发

博格华纳杨世卿Dec.5,2025

Agenda

EViDMDrivelinelayouttypes

▶ParallelLayshaft

▶ConcentricLayshaft

▶Coaxial(Planetary)

▶Comparison

▶REEViDMDrivelinearchtecture

▶Currentlywidelyused

▶Nextgeneration

▶Nextgeneratonarchitecture

▶Q&A

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Agenda

▶EViDMDrivelinelayouttypes

▶ParallelLayshaft

▶ConcentricLayshaft

▶Coaxial(Planetary)

▶Comparison

▶REEViDMDrivelinearchitecture

Currentlywidelyused

Next

Next

generation

generationarchiteture

▶Q&A

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EViDMDrivelinelayouttypes

Accordingtothestructure,gearboxlayoutcanbecommonlyclassifiedinto:ParallelLayshaftoff-axis

ConcentricLayshaft(On-axis)

Coaxial(PlanetaryOn-axis)

Category

ParallelLayshaft

ConcentricLayshaft

Coaxial(Planetary)

Off-axis

On-axis

Sketch

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EViDMDriveline

layouttypes

Accordingtothestructure,gearboxlayoutcanbecommonlyclassifiedinto:

·ParallelLayshaftoff-axis

·ConcentricLayshaft(On-axis)

·Coaxial(PlanetaryOn-axis)

Category

ParallelLayshaft

ConcentricLayshaft

Coaxial(Planetary)

Off-axis

On-axis

Sketch

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ParallelLayshaft

Off-axisarchitecturefortheinputshafandoutputshaftMaincomponents

·nputshaftassembly

·countershaftassembly

·outputshaftassemblyInputshaftassembly

·Parallellayshaftisthemostwidelyusedarchitecture.Ifnospacelimit,thisshouldbethebestchoice.

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ConcentricLayshaft

On-axisarchitecturefortheinputshaftandoutputshaft.

Maincomponents

cIuttesrhassinlegratedrotorshaft)Countershaftassembly

·outputshaftassembly

·linkshaftassembly

Outputshaftassembly(differential)

·Thistypeusuallyusedforlimitedspace&lowtorquecapacity.

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Coaxial(Planetary)

On-axisarchitecturefortheinputshaftandoutputshaft,withplanetarygearsinside.

Maincomponents

·inputshaftassembly(integratedrotorshaft)

·planetarygearassembly

·outputshaftassembly(panetarycarrier+bevelgearfordifferential)

·linkshaftassemblyandringgear.

PlanetarycarrierPlanetarycarrierEmbeddifferentialbevelgearr

Planetarygearassembly(x3)Bevelgearfordifferential

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Comparisonofenvelopespace

TheenvelopespaceXYZofthegearboxlayoutwiththesamewheelendtorqueisasfollows.

Item

ParallelLayshaft

ConcentricLayshaft

Coaxial

Diff-tradition

Diff-Embed

X

400

320

260

260

Y

180

210

205

165

Z

280

250

260

260

Volume

20.16L

16.8L

13.858L

11.154L

Graph

(XandZcontainshousing,Yistheaxial)

·PlanetaryCo-axialisthesmallest,45%spacebenefitcomparedwithparallel.

Comparationfordifferenttypegearbox

Comment

Eventhoughplanelarygears'pricedecreasedrecently,it'sexpensive.

Planetarygearboxismostcompact

Planetarygearsarehardtoproduce

Planetarygearsaremorecomplextoassemble

Planetarygears'NVHishardtocontroldueto

·complexityinmanufacturingandassembly

·Meshphasedesignconsideration

Hardlubricationongearsandbearings

Scoresbasedonsimilaroillevel.

Morerotarpartsmerged,higheroilchurningloss.

Planetarycarrier&NRBsarehardtogetlubricated

Item

BOMCost

Envelopespace

Machiningfriendly

Assemblyfriendly

ParallelLayshaft

++

+

++

+

+

+

+

ConcentricLayshaft

+

+

+

++

NVH

Reliaility

Eficiency

Lubrication

Coaxial

Planetary

·

··

+

+

+

++

-

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Conclusionforthegearboxtypes

·Parallellayshaftsuggesttoconsiderasthefirstchoice

·Gooddesignmaturityandindustrializationlevel

·Costbenefit

·Concentriclayshaftsuggesttoconsiderassecondchoice

·Designislittleexpensivethanparallellayshaft

·NVHperformancenoteasytocontrolathighloadcondition

·Coaxialplanetarysuggesttouseforlimitedspacecondition

·Mostexpensive&complexdesign

·Smallestspaceneeded

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Agenda

▶EViDMDrivelinelayouttype

ParallelLayshafl

ConcentricLayshaft

Coaxial(Plenetary)

Conpanjson

▶REEViDMDrivelinearchtecture

▶Currentlywidelyused

▶Nextgeneration

▶Nextgenerationarchitecture

Q&A

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REEViDMDrivelinelayout-Currentlywidelyused

REEV(P1+P3)

2motorswithonlyseriesmode

PHEV(P1+P3)

2motorswithseries¶llelmode

REEV(P1+P4)

2motors(standalonegenerator+P4)

离合器

瞳出轴

Picturesfromintemet比亚迪汽车DM湿助系统译解

·Alloftheabovearchitectureshas2motors,canaccomplish2wheelsdrive.Can'thavethebestcost

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REEViDMDrivelinelayout-Nextgenerationarchitecture

Motorposition

·In-linewithICE

·off-linewithICE

Couplingtype

·Frictionplate

Couplingfunction

·Mono-stable

·Bi-stable

Gearpairtype

·W/planetarygears

·W/oplanetarygears

Dampertype

·W/physicaldamper

·W/ophysicaldamper

·Comfortability

·Efficiency

Shiftspeed

·Comfortability

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