Unusual also is the powertrain uses its two motors along with a clutch and a
single fixed gear ratio instead of a conventional multi-speed or Continuously Variable Transmission (CVT).
The Accord Hybrid leads the pack in EPA mileage with its unique «Two - Motor» powertrain using two electric motors, a clutch, and a single
fixed gear ratio instead of a conventional multi-speed or Continuously Variable Transmission (CVT) between the engine and wheels.
Regardless of the chosen power train, all Rogue models feature Nissan's Xtronic Continuously Variable Transmission (CVT), which eschews
fixed gear ratios in favor of infinitely variable ratios.
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.
Well, traditional automatic transmissions have five, six or even seven gears, while Nissan's XTRONIC CVT doesn't even have
traditional fixed gear ratios.
One of the unique features of this particular hybrid system is that doesn't need a conventional transmission and uses a multi-mode
single fixed gear ratio to put power down to the wheels.
Four
fixed gear ratios and two variable - ratio modes optimize performance and efficiency.
The Honda's unusual trick (all good hybrids have at least one) is that the gas engine can be mated to the front wheels through
a fixed gear ratio.
Because of
the fixed gear ratio, that's not directly comparable to a gasoline engine's rating: at full throttle, the peak torque available at the rear wheels of a V - 8 Porsche Panamera S is 7780 lb - ft in first gear; the Karma's peak is about half that, or 4022 lb - ft.
The new Formula EV cars use a Hewland paddle - shift five - speed sequential gearbox, with
fixed gear ratios to reduce costs....
Moreover, reports indicate that the new system disposes a conventional gearbox in place of a single -
fixed gear ratio.
GM chose to go the dual - mode route with 4
fixed gear ratio (instead of one fixed gear ratio as in direct mechanical coupling) in order to minimize load on the battery and for extended towing or pulling loads.
These issues concern motor V / Hz,
Fixed gear ratio.
It also offers an advantage with the operation of the electric motor, improving the motor / generator efficiency by about 3 % compared to
a fixed gear ratio.
Most modern implementations, however, are standard or slightly modified manual transmissions (and very occasionally modified automatics — even including a few cases of CVTs with «fake»
fixed gear ratios), with servo - controlled clutching and shifting under command of the central engine computer.
As with other CVTs, the Maxima's transmission has
no fixed gear ratios.
Honda says that
the fixed gear ratio enables a smooth transfer of torque within the system.
A 60 kW (81 hp) electric motor sits at the rear and transmits power via a single
fixed gear ratio to the wheels — no gear changing needed.
The front motor runs off
a fixed gear ratio, which is decoupled beyond 235 km / h.
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 angular gear operates at
a fixed gear ratio (1:1.74) and is permanently engaged, meaning that the cardan shaft always rotates when the vehicle is driven.
The fixed gear ratio of the gas engine to the wheels is about the same as the conventional model's manual transmission in its top sixth gear.
As it has no physical gears or
fixed gear ratios, a CVT actually features the equivalent of an infinite number of gears.
(It means it has
no fixed gear ratios.)