![]() ![]() The torque transmitted by an open differential will always be equal at both wheels if one tire is on a slippery surface, the supplied torque will easily overcome the available traction at a very low number. In such a case with a standard differential, the slipping or non-contacting wheel will receive the majority of the power (in the form of low-torque, high-rpm rotation), while the contacting wheel will remain stationary with respect to the ground. The main advantage of a limited-slip differential is demonstrated by considering the case of a standard (or "open") differential in off-roading or snow situations where one wheel begins to slip. The ZF "sliding pins and cams" became available, and one example was the Type B-70 used during the Second World War in the military VWs ( Kübelwagen and Schwimmwagen), although technically this was not a limited-slip differential, but a system composed of two freewheels, which sent the whole of the engine power to the slower-turning of the two wheels. In 1935, Porsche commissioned the engineering firm ZF to design a limited-slip differential to improve performance. The high power of the design caused one of the rear wheels to experience excessive wheel spin at any speed up to 160 km/h (100 mph). In 1932, Ferdinand Porsche designed a Grand Prix racing car for the Auto Union company. In an automobile, such limited-slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity. Limited-slip differentials are often known by the generic trademark Positraction, a brand name owned by General Motors. JSTOR ( December 2016) ( Learn how and when to remove this template message)Ī limited-slip differential ( LSD) is a type of differential that allows its two output shafts to rotate at different speeds but limits the maximum difference between the two shafts.Unsourced material may be challenged and removed.įind sources: "Limited-slip differential" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification. ![]()
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