Volvo Gearbox: new & used Duett 740 car gearboxes, Amazon / 120 / 130 models
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Tiptronic is a type of discrete automatic
transmission developed by
Porsche and used in its vehicles and those of its licensees.
A Tiptronic transmission can operate just as the common type of automatic transmission,
but it also allows the driver to override the automatic mode by moving the shift
lever into a second (Tiptronic) shift gate equipped with two spring-loaded positions:
"upshift" and "downshift". Once in this gate, the driver takes
over most of the shifting decisions ordinarily performed by the transmission's computer,
permitting, for example, the delaying of an upshift for increased acceleration or
to increase the braking effect of the engine. On some models, the upshift and downshift
operations can also be commanded by pushbuttons or paddle shifters installed on
the steering wheel with an optional display in the instrument panel indicating the
current gear selection.
Though Tiptronic transmissions allow
the driver a certain measure of discrete control, the Tiptronic design is implemented
using a torque converter like other automatic transmissions. A Tiptronic is not
a computer controlled clutch-manual transmission or semi-automatic transmission.
Most Tiptronic implementations still make some shifts automatically, primarily to
protect the engine and transmission. For example, as used by Audi, a five-speed
Tiptronic will make the upshifts from 1 to 2 automatically when moving off from
a stop even when in Tiptronic mode; the transmission then waits for the user's upshift
command before proceeding from 2 to 3, 3 to 4 and 4 to 5, although the transmission
will still upshift if the redline is approached. On deceleration, the transmission
will make all downshifts automatically to avoid running the engine at too-low an
RPM although the user can accelerate any downshift (that would not violate the redline),
thus allowing improved engine braking or preparation for future acceleration. There
are some exceptions to this; the system used in the Aston Martin DB9 is designed
to hold the gear at the engine's redline, though it will still downshift automatically.
This system also allows the engine to blip the throttle during downshifts for a
sportier drive.
Most luxury vehicles with a Tiptronic
transmission have two fully-automatic modes: One, identified as "Comfort"
or similar, and another, usually called "Sport," which delays upshifts
for a sportier driving at the expense of fuel, wear, comfort, and noise. Then, within
each major mode there are additional hidden modes selected by the transmission itself;
these modes adapt to the demands being placed upon the car by the driver. In this
way, shift quality has been improved due to better electronic controls; these electronics
modify the shift points to adapt to a given operator's driving style.
Some makers such as Aston Martin, BMW and Smart offer paddle
shifters behind the steering
wheel for controlling their similar transmissions.
Some systems such as Ferrari's F1-Superfast, Toyota SMT, and
Volkswagen's DSG are different
from Tiptronic transmissions in that they are actually based on sequential transmisions
but have an electronically controlled clutch (or in Volkswagen's case, two clutches).
These are generally not referred to as Tiptronics but are considered to be true
semi-automatic transmissions.
Tiptronic® is a registered
trademark, and it is owned by German sports car maker Porsche, who licenses
it for use by others such as
Volkswagen,
Audi and
Skoda.
Other manufacturers use Tiptronic-like
systems under different names:
Acura: Sequential SportShift
Alfa Romeo:
Sportronic, Q-Tronic
Aston Martin: Touchtronic
Audi: Tiptronic, Multitronic (CVT)
BMW: Steptronic
Chrysler/Dodge/Jeep: AutoStick
Citroën: Sensodrive
Ford
(Australia): Sequential Sports Shift
Honda: iShift, S-matic, MultiMatic
Hyundai:
Shiftronic, H-Matic
Infiniti: Manual Shift Mode
Jaguar: Bosch® Mechatronic
Lexus: E-Shift
Mazda: Sport AT
Mercedes-Benz:
TouchShift
MG-Rover: Steptronic
Mitsubishi: INVECS, INVECS II, Sportronic, Tiptronic
Nissan: Tiptronic
Vauxhall: Easytronic
Peugeot: 2Tronic
Saab: Sentronic
Subaru:
Sportshift (system developed and name used under license from Prodrive Ltd.)
Volkswagen : Tiptronic
Volvo cars on the market are
the:
Small family car: 440 / 460, S40 / V40, S40 / V50
Large family car: Amazon / 120 / 130, 140, 240, 850, S70 / V70 S60 / V70, Duett
740, 940
Executive car: 164, 760, 960, S/V90, S80, S80, 260
Sport: P1800, 1800S, 1800E, 1800ES, 242 GT, 240 Turbo, 850 R, S/V70 R, S60 / V70,
T5, S60 / V70 R
Coupé: 262C, 780, C70, C70