A further example of the technology spearhead role is an all - new double electric motor system driving both rear wheels, connected together
by planetary gears.
The two power sources are joined
by a planetary gear set that transmits the blended torque to an electronically controlled continuously variable transmission (eCVT) and onward to the front wheels.
Not exact matches
Torque is divvied up
by a compound
planetary gearset; when slip is detected, an electronically controlled clutch increases or reduces the friction between the two ring
gears to change the front - to - rear distribution.
Audi Q5 Audi's Quattro all - wheel drive is based on a torque - sensing center differential, with the bias controlled
by two sets of
planetary gears and several friction discs.
By now the Evo has a six - speed» box, Super-Active Yaw Control using a
planetary gear set with a greater torque transfer capacity, and MIVEC variable valve timing.
Two
planetary gear sets operated
by two computer - controlled clutches help steer the vehicle
by increasing the amount of torque delivered to one rear wheel.
Dual Clutch and Constantly Variable trannies don't operate like regular automatic trannies in that they don't (to my knowledge) operate
by redirecting tranny fluid to lock and unlock
planetary carriers; they don't even have
planetary gears.
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.
The
gear ratio is determined
by the number of teeth on the smaller,
planetary gears in ratio to the number of teeth on the larger, sun
gear.
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.
Chevrolet claims that thanks to the Malibu's two - mode system (basically two
planetary gear sets switched between via a clutch), they're able to have the car performing well both around town and on the highway,
by metering - out how fast the gas engine spins.
Polestar's test drivers focused specifically on Polestar 1's torque vectoring system, which is enabled
by two rear electric motors with individual
planetary gear sets.
Because the A-500 and A-518 were essentially made
by adding lockup torque converters and an overdrive
planetary gearset to the A-999,
gear ratios were not optimal; they were not redesigned to match the torque curve and torque rise of the mated engine.
This is made possible
by the addition of a
planetary gear set and a multiple - plate clutch operated
by an electric motor on both output sides of the rear differential.