The system also includes a set of speed - multiplication
planetary gears for each drive shaft.
Not exact matches
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A clutch locks the ring
gear of the
planetary gearset
for a 7.0:1 speed reduction and torque multiplication ratio.
The power sources work individually on say the ring and the
planetary carrier, while the sun
gear is used
for power take - off to the wheels.
The
planetary gearset is what's responsible
for changing
gear ratios, and it consists of a sun
gear surrounded by smaller planet
gears carried by a planet carrier enclosed in a ring
gear.
Thanks to the double electric rear axle's
planetary gears, torque vectoring features
for the first time, separating the power from each of the electric rear motors to drive the car through corners, rather than convention traction control systems that brake the inner rear wheel, slowing the car in bends.
Depending which
planetary gear sets are connected in series, blocked or separated, multiplying the part ratios produces the overall ratio
for the relevant transmission
gear.
As with all Toyota hybrid transaxles introduced from 2006 forward, it utilizes a
planetary reduction
gear for the traction motor in addition to the
planetary gearset that is employed as a power - split device.
In addition to its motor - generator duties, the crucial MG1 adds two functions: One as a starter motor
for the gas engine; and two, by regulating the amount of electrical power it generates (which varies its RPM), MG1 controls the output speed of the transaxle through the
planetary gear set — without clutches or viscous couplings.
These
planetary gear sets enable torque vectoring
for keeping maximum road grip and maintaining speed whilst cornering.
Internally, the transmission has four
planetary gear sets, two of which are nested
for economical packaging.
The Torsen T3 centre differential combines a
planetary gear set with a Torsen differential in a compact package developed
for centre differential installations.
The place
for gearheads, ampheads, and anybody else who wants to discuss the finer points of battery technology, regenerative braking, continuously variable transmissions,
planetary gear sets, computer control systems, etc..
[1] BorgWarner's original design called
for using both a software controlled electromagnetic multi-disc (also called multi-plate) clutch pack and a
planetary or bevel
geared center differential together.
The alternator uses a larger front bearing, a cooling fan and die - cast aluminium cooling fins
for the rectifier; the
planetary -
gear starter uses a crank - hold feature.
Toyota, Ford, and GM instead use a variation of a power - split design that allows some power to flow mechanically and some electrically when the gas engine is running via a
planetary gear arrangement that allows
for a continuous range of effective
gearing ratios between the engine and the wheels.
This CVT, which has a sub
planetary gear and is configured
for smaller output engines, feels handcuffed.
The
planetary gearset simultaneously fulfills three roles: as a power split device between the generator and the front wheels, as a reduction
gear for the electric motor and, when both work together, as an electronically controlled continuously variable transmission (CVT).