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In that original quattro system, later found in road-going passenger cars, the engine and transmission are situated in a longitudinal position. Torque is sent through the transmission to a mechanical centre differential [3] (commonly abbreviated to "diff") which apportions (distributes) the torque between front and rear driven axles. 4WD was permanently active.
Torsen differential from an Audi quattro. Torsen Torque-Sensing (full name Torsen traction) is a type of limited-slip differential used in automobiles. It was invented by American Vernon Gleasman [1] and manufactured by the Gleason Corporation. Torsen is a portmanteau of Torque-Sensing.
Audi Quattro Torsen Differential. Geared, torque-sensitive mechanical limited-slip differentials use worm gears and spur gears to distribute and differentiate input power between two drive wheels or front and back axles. This is a completely separate design from the most common beveled spider gear designs seen in most automotive applications.
A torque vectoring differential requires an electronic monitoring system in addition to standard mechanical components. This electronic system tells the differential when and how to vary the torque. Due to the number of wheels that receive power, a front or rear wheel drive differential is less complex than an all-wheel drive differential.
At the Paris Motor Show in 2010, Audi presented the quattro concept on the occasion of the 30th anniversary of the original Audi Quattro and the Audi quattro four-wheel-drive system. Based on the RS5 , it features a modified 2.5 L five-cylinder TFSI engine shared with the TT and a 6-speed manual transmission from the S4 .
Haldex Traction is a manufacturer of intelligent all-wheel drive (AWD) systems, founded in Sweden.Since the invention of Gen I in 1998, the company produced several generations of products licensed to and customized for some major automotive brands, that in turn have marketed Haldex Traction AWD under different names.
Differential operation while driving in a straight line: Input torque is applied to the ring gear (purple), which rotates the carrier (purple) at the same speed. When the resistance from both wheels is the same, the planet gear (green) doesn't rotate on its axis (although the gear and its pin are orbiting due to being attached to the carrier).
Available in Coupé and Cabriolet bodies, it is a version of A5 with 4.2 FSI engine rated at 450 PS (331 kW; 444 hp) and 500 N⋅m (369 ft⋅lbf), seven-speed S-Tronic transmission, quattro permanent all-wheel drive system with crown-gear centre differential and torque vectoring (optional quattro with sport differential rear axle), 20 mm (0.79 ...