Why Doesn't Audi Use Torsen?
2 Answers
Audi's reasons for not using Torsen include compromise on patent barriers, compromise on emission regulations, and confidence in its own technology. Compromise on patent barriers: Torsen's patent is held by a steering system manufacturer called JTEKT, which is a Toyota-affiliated company. Given Audi's status in the industry, it likely doesn't want to rely on a competitor for such a critical technology (similar to AT and DCT transmissions). Compromise on emission regulations: Torsen, including the crown gear differential, is indeed not fuel-efficient, mainly due to transmission efficiency and weight. Confidence in its own technology: With significant advancements in sensor technology and electronic control technology, coupled with Audi's confidence in its own technology.
Let me explain this from a technical perspective. The Torsen differential is an older mechanical design—while durable, it lacks flexibility in control. Modern vehicles are moving toward electrification, and Audi's switch to an electronically controlled differential allows more precise torque distribution adjustments to suit various driving scenarios. For instance, on slippery roads or during high-speed cornering, sensors monitor wheel speed differences in real time, enabling automatic torque transfer for improved stability. In contrast, the Torsen relies purely on mechanical principles, reacting slowly and struggling to meet the demands of hybrid or fully electric powertrains. After Audi transitioned to rear-wheel-drive platforms, electronic modules could be seamlessly integrated into the vehicle network, saving space and optimizing fuel efficiency. While the Torsen is a classic and reliable solution, technological progress demands smarter alternatives.
