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XWD, an acronym for Cross-Wheel Drive and also known as Haldex Generation 4, is an all-wheel drive system designed by Haldex in partnership with Saab. [1] The XWD is a permanent all-wheel drive system, that can pre-emptively and continuously change torque distribution before wheel slip occurs. Saab Turbo X, the launch vehicle for Saab XWD
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.
The change to the Haldex system also changes the handling closer to a front-wheel drive car. Compared to the Torsen, the Haldex can direct torque more unequally to the front wheels (from 100:0 to 50:50 front-to-rear bias), thus providing a wider bias range than the 75:25 to 25:75 of the B5 Passat. Haldex is a reactive-type system, behaving as a ...
Haldex co-owned (from 2004) the company Alfdex with Alfa Laval, for production of separators for truck engines. Haldex after 2011: In 2011, the Traction division was divested to BorgWarner, including the all-wheel drive. The hydraulic division formed a new company called Concentric and was listed on the Stockholm stock exchange.
Volvo began offering a 4.4 L (4,414 cc) V8 engine in its large P2 platform automobiles in 2005. [6] [7] It was initially offered only for the Volvo XC90 [6] [7] but later found its way in the second generation Volvo S80, [5] and was mated to a six speed Aisin Seiki AWTF80-SC transmission of Japan also with a Swedish Haldex all-wheel drive (AWD) system.
Valves can be categorized also based on their function: Check valve or non-return valve, allows the fluid to pass in one direction only; Flow control valve, to maintain and control a variable flow rate through the valve; Poppet valve, commonly used in piston engines to regulate the fuel mixture intake and exhaust; Pressure-balanced valve
Sister companies Škoda simply uses the nomenclature "4x4" after the model name, whereas Porsche merely uses "4". [2] None of the above trademarks is specific to any particular 4WD system or technology being employed. Generally, Volkswagen would use Haldex Traction clutch system on their "4motion" transverse engined cars.
cast aluminium alloy; four valves per cylinder, 16 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, toothed chain-driven double overhead camshaft (DOHC), continuous vane-adjustable variable intake valve timing, Audi variants have two-stage "valvelift" inlet valve lift variable control