Not exact matches
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.
The gearbox, which is shared with both the 2013 Versa sedan and 2013 Sentra, uses a fixed
planetary gear ratio during launch before switching to infinitely
variable ratios.
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.
GM's base FWD 2 - mode system incorporates two electric motors, two
planetary gear sets and a system of four hydraulically - applied wet - plate range clutches to deliver two continuously
variable speed - ratio ranges (modes) and four forward fixed
gear ratios.
With two pure mechanical
gear points, infinitely
variable ratio in between, start - stop, regenerative braking, pure electrical mode, electric power assist, 100 % towing capability — the hybrid one seems to be better use of quite expensive
planetary mechanics.
The former plays the role of a starter and can charge the battery pack or power other electric motors as needed while the latter distributes the power to the drive wheels via a
planetary gear - type continuously
variable transmission.
Lexus explains: «The new system is based on the electronically controlled
planetary continuously
variable transmission of Lexus Hybrid Synergy Drive coupled to an all - new four - speed automatic
gear set at the output stage.
Power from the gas engine and front electric drive motor (MG2) is distributed to the drive wheels via a
planetary gear - type continuously
variable transmission, which eliminates specific
gear ratios.
Cadillac feeds that power through GM's special Electric
Variable Transmission, which uses two electric motors to move three
planetary gears that have an infinite ratio of synchronous shifting.
A
planetary gear set transmits the blended output to an electronically controlled continuously
variable transmission (CVT) that directs the power to the front wheels.
The five - speed automatic version comes with — take a breath -
variable torque distributing
planetary gear setup with electric control.
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.
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..
However, as the development process continued, engineers at BorgWarner discovered that, with clever software programming, they could control the
variable electromagnetic multi-disc clutch to a point where it would allow the front and rear drive shafts to turn at different rotational speeds on its own, without the aid of a
planetary or bevel
geared center differential.
[1] Instead of a
planetary or bevel
geared center differential, the system uses a
variable intelligent locking center multi-disc differential.
The transmission is a complex mess of
planetary gears and clutches with multiple
variable and fixed
gear ratios, but in layman's terms, it basically acts like a CVT.
The gasoline engine works in tandem with a two - motor, continuously
variable planetary -
gear transmission that uses one electric motor to provide traction power to the wheels and one motor to change the transmission's modes.
The motor / generators work with the
planetary gearsets, so the EVT is capable of an infinite range of
gear ratios just like a continuously
variable transmission.
The two - motor EVT also uses three
planetary gears and is mated to a 2.0 L turbo 4 - cylinder engine with spark - ignited direct injection and
variable valve technology.
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).