Using an electronically
controlled hydraulic clutch, the AWD system distributes drive between the front and rear wheels to ensure the best possible road grip in all situations.
Here, the heart of the AWD system, the electronically
controlled hydraulic clutch developed in cooperation with Haldex AB of Sweden, has adjustable base - line torque of up to 80 Newton metres.
Four - wheel drive versions can vary torque front to rear by a full 100 per cent, via an electronically -
controlled hydraulic clutch.
Not exact matches
The all - wheel drive system is
controlled by a set of electro -
hydraulic clutches that vary torque between both axles according to both the conditions and driver mode selected.
When you are as little as one ounce short or too much, these pressures are wrong and because the
hydraulic brakes and
clutches inside won't work smoothly with the wrong pressure, the
control unit forces emergency mode.
Transmission fluid is directed throughout the valve body by various transmission solenoids — such as the transmission shift solenoid, lockup solenoid, or transmission
control solenoid (there's also a torque converter
clutch solenoid)-- that either open or close
hydraulic valves to regulate fluid flow.
Via a number of pressure valves, the
hydraulic control unit masterminds both the wet
clutches and the shift cylinders activating the transmission ratio required.
Usually this ability is provided with a differential known as a viscous coupling or multi-plate
clutch, although more recently a similar outcome has been achieved by using electronically -
controlled hydraulic or electro - magnetic «
clutch» systems.
A redesigned manual transmission with a
hydraulic clutch was standard equipment in all trims while an all - new electronically
controlled 4 - speed automatic transmission was optional for all models.
Failure to accelerate, when engine RPM rises, can be due to slippage in the transmission and that can be due to faults in the torque converter,
clutch pack or the
hydraulic controls (e.g., inadequate line pressure).
The cause of something like this could range from a defective vehicle speed sensor (in the transmission) to failing friction material in the transmission
clutch packs to
hydraulic control faults in the transmission valve body and / or the transmission shift solenoids...
The multi-plate
clutch controlled four - wheel - drive system of the old 911 Turbo S has also been reworked with electro -
hydraulic actuation replacing the exclusively
hydraulic operation used up until now.
A more compact and lightweight construction was achieved by concentrating the linear solenoid valves and other
clutch control devices and
hydraulic circuits under the
clutch cover.
The in - line layout of these two
clutches (patent pending) along the transmission axle, together with the
hydraulic control piston installed on the inner face of the
clutch disc, results in a more compact configuration which also minimizes lateral intrusions in the direction of the transversely mounted engine.
The multi-plate
clutch at the heart of the Golf R's Haldex 5 all - wheel drive system is familiar enough, using an electro -
hydraulic oil pump to engage and send almost 100 percent of available torque to the rear axle when a
control unit deems it necessary.
Called the Nano F - Tronic, an electro -
hydraulic mechanism that uses electronic
control unit and a
hydraulic system to supervise
clutch usage and gear shifting, allows the driver to shift gears without a
clutch.
Both transmissions share the automation components — dual
clutch, integrated or external dampers, pump, mechatronics with
hydraulic and electronic
control and regulation, sensors, and shift cylinders.
Description —
Hydraulic w / electronically
controlled converter
clutch Gear — Ratio - 1st — 2.69 - 2nd — 1.55 - 3rd — 1.00 Effective Final Drive and Overall Top - Gear Ratio — 3.02 (2.5 liter); 2.78 (3 liter)
The compact Duonic dual -
clutch transmission is based on a mechanical six - gear manual transmission, with two
hydraulic wet
clutches and electronic
control.
The CR - V's all - wheel drive system consists of the conventional front - wheel - drive system, a compact transfer case that distributes torque to a propeller shaft running the length of the vehicle; the rear differential; an electronically -
controlled hydraulic pump; a multi-plate
clutch; and left and right rear - wheel driveshafts.
* 2: ACD (Active Center Differential) The Active Center Differential uses an electronically -
controlled hydraulic multi-plate
clutch to optimize front / rear wheel torque split and thereby produce the best balance between traction and steering response.
Based on this data, BorgWarner's patented lightweight centrifugal electro -
hydraulic (CEH) actuator distributes the required torque between the two axles by compressing the
clutch pack, allowing the AWD transfer case to deliver pre-emptive and precise linear
clutch actuation for immediate response, enhanced vehicle traction and stability
control.
This is made possible by advanced technologies, like the electronically
controlled hydraulic multi-plate
clutch, the addition of torque vectoring and quattro ® integration within the Audi drive select system.
The TCU software
controls hydraulic valves that actuate gears and
clutches.
The EAST TCU is designed as an electronic platform, which can monitor and
control continuously variable transmissions (CVT), wet double -
clutch transmissions (DCT),
hydraulic and electric automated manual transmissions (AMT) as well as traditional step - automatic transmissions (AT).
Naturally, it also comes with all of the RS 3 Sportback goodies, including a seven - speed dual -
clutch automatic transmission, electro -
hydraulic multi-plate
clutch - operated quattro permanent all - wheel drive, progressive steering and optional RS sport suspension plus with adaptive damper
control.
The solenoids allow direct
control of the
hydraulic pressure applied to the shifting
clutches, along with centrifugal fluid pressure canceling mechanisms, enabling finer
control than conventional
clutch -
control systems.
Mated to a 6 - speed manual transmission with a
hydraulic clutch, the engine also features variable camshaft
control, knock sensor and double - inertia flywheel.
-4514 Fax: 570-602-5442 Email:
[email protected] Website: http://www.keystoneautomotive.com/ Booth Number: 20281, 20379, 20481 Customizer / Builder: Ben Chase / Keith Zimbauer, Z - Fab, Santa Clara, CA Powertrain / Drivetrain: Chevrolet big - block 496 engine; AFR heads; Edelbrock intake; Holley carburetor; Crower
hydraulic roller cam; SCAT rotating assembly; MSD ignition; Lemons headers; MagnaFlow exhaust; Tremec five - speed transmission; Quicktimes bellhousing and custom
clutch; GM 12 - bolt differential; 3.73 gears; True Trac posi; Moser axles Chassis: Hotchkis sway bars and springs; Bilstein shocks and
control arms; Baer brakes
An Automated Manual Transmission is basically a gearbox which is nothing but a regular manual transmission with an electronic
control unit and a
hydraulic system which supervise the use of
clutch and gear shifting.
Now called Sportshift III, this single -
clutch, seven - speed automated manual is supplied by race - box builder Graziano, with new
hydraulics and
control electronics, faster shift speeds and a lighter case.
The revolutionary Auto Gear Shift is based on an electronic
control unit which drives the precision
hydraulic actuator to
control the
clutch engagement and the gear shifting.
In automatic models the torque distribution between the front and rear axles is
controlled electronically by a
hydraulic transfer
clutch.
When slip is detected there, it can redistribute forces to the rear axle via a
hydraulic multi-plate
clutch with electronic
control — instantaneously and variably.
It is primarily known for its powertrain products, [8] which include manual and automatic transmissions and transmission components, such as electro -
hydraulic control components, transmission
control units, friction materials, and one - way
clutches, turbochargers, engine valve timing system components, along with four - wheel drive system components.
The operation of the
clutch is
controlled by a
hydraulic actuator, thereby relieving your left leg.
This new transmission also uses a quick - response, low - friction
clutch pack for enhanced fuel economy; an ultra-flat, low - inertia torque converter for high transmission efficiency; a set of high - response, low - slip
clutch packs and new electronic and
hydraulic control systems that incorporate an intelligent shift
control that learns driver's driving style and selects gears based on that style.