nu vinci_planetary summary ppt

7/30/2019 Nu Vinci_Planetary Summary PPT

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Slide 12012 Fallbrook Technologies Inc. All rights reserved.

NuVinci

Planetary Analogy


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Slide 2

Discussion of Planetary Analogy

An ordinary planetary gear has three components: A ring gear

A sun gear

A carrier with planet gears

Each one of these three components can be the input, the output, or held stationary.For each connection case, the planetary produces a different ratio between input and

output.This arrangement is very advantageous for transmission designers because it allowsmultiple gear ratios to be achieved using a single set of gears in a very compact space.This, along with other advantages like high torque capacity, is the reason planetarygears are so widely used in everything from electric drills to automotive transmissionsto earthmoving equipment.

The planets in NuVinci technology, unlike those in a conventional single planetary, are

in contact with two rings simultaneously making it more analogous instead to acompound planetary gear having two ring gears. Because the planetary gear setfeatures of the NuVinci technology differentiate it from other CVTs, the NuVinci CVTcan be referred to as a continuously variable planetary or CVP


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Slide 3

Discussion of Planetary Analogy (continued)

In the same manner that different ratios can be obtained by changing which parts of aconventional planetary are the input, output, and held stationary, different ranges ofvariability can be obtained from NuVincitechnology simply by changing whichcomponents are the input, output, and held stationary.

The key difference is that, because there are four components, one must be allowed toturn freely, as is the case for compound conventional planetary gears. For example, in astandard NuVinci CVP, the carrier is held stationary, the sun is left to turn freely, ring 1

is the input and ring 2 is the output, as shown in the IVP video in the video player.Looking more closely at NuVinci, the same basic components plus an extra ringemerge:

Ring 1

A carrier with planets

A central sun

Ring 2

If, however, a NuVincis ring 1 is held stationary, the sun is again free, but the carrier isused as the input, and ring 2 is the output, an infinitely variable planetary (one wherethere is a powered zero state where the input turns but the output does not, and

where there is a smooth, seamless transition from reverse to forward is obtained, asshown in the video.


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Slide 4

Infinitely Variable, Infinitely Applicable

In fact, there are 10 possible combinations with NuVinci technology alone, and wellover 300 possible combinations when a single conventional planetary is mated toeither the input or the output of a CVP or an IVP. This versatility is novel among CVTsand IVT technologies, and is the basis for our infinitely variable, infinitely applicable

tagline.

The following slides depict graphically the planetary analogy.


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Slide 5

NuVinci Planetary Analogy

NuVinci CVP Basic Elements

Input Disk

(Ring gear)

Output Disk/Shell

(Ring gear)

Balls (3x-12x)

12

4

Ring 1 Ring 2

Ball Axle


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Slide 6


Draw a Kinematic Stick Figure of NuVinci

Ring 1

(Ring gear)

Ring 2

(Ring gear)

Balls (3x-12x)


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Slide 7



Ring 1

(Ring gear)

Ring 2

(Ring gear)

Stator (Carrier)

Balls = Planet Gear w/ 3 Major Diameters


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Slide 8



Ring 1

(Ring gear)

Ring 2

(Ring gear)

Idler (Sun gear)Stator (Carrier)



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Slide 9


The Continuously Variable Planetary (CVP) Emerges

Ring 1

(Ring gear)

Ring 2

(Ring gear)

Idler (Sun gear)Cage (Carrier)

1 2

3

Balls = Planet Gear w/ 3 Major Diameters (1, 2, 3)


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Slide 10


Tilting the Ball Axle (4) Enables Continuously Variable PlanetGear Major Diameters

Ring 1

(Ring gear)

Ring 2

(Ring gear)

Idler (Sun gear)Cage (Carrier)

4

Continuously variable

major diameters



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Slide 11


NuVincis unique planetary kinematics are well suited forhybrid vehicles, where more than one prime mover is used

NuVincis unique planetary kinematics also enable it to be theonly known variator that can be both a CVT and an IVT withoutthe use of additional mechanical power paths

Normal NuVincipowerpath


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Slide 12




Lawn & Garden NuVinci

powerpath


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Slide 13




HybridNuVinci

powerpath


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Slide 14




10 Discrete options with

NuVincialone

300+ Discrete options withNuVinci+ geared planetary


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Slide 15

Summary of NuVinciAdvantages as a Planetary

Can serve as either a CVT or an IVTSimplifies support of multiple prime movers

Stable, simple position-based control

Does not need expensive, inefficient hydraulic controls forclamping

nu vinci_planetary summary ppt

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