The essence of quattro four-wheel drive lies in the central differential of Torsten C structure, which is often referred to as the central differential of planetary gear structure. It has three obvious characteristics: 1, pure mechanical structure, fast response central differential of Towson structure, self-locking function, and can automatically distribute the torque output of front and rear axles according to road conditions. There is no need to add an electronic controller for distribution and reaction time, because it is a direct mechanical connection. It's like pushing a chair with your hand. You pile it up and it leaves. There is no reaction time. However, when the multi-plate clutch central speedometer meets the scene that the power distribution of the front and rear axles needs to be changed, the torque distribution needs to be controlled by the combination depth of the clutch plates, which is like a manual gear where you can start smoothly by controlling the clutch depth. There needs to be a process of gradual contact.
2, high reliability, maintenance-free Torsten mechanical structure of the central differential because all gear transmission, no clutch, so the reliability is higher than the multi-plate clutch differential. It has no complicated oil circuit, laminated clutch plates and electronic control mechanism. Simple structure, easy to maintain even if it is broken. Towson C-type mechanism central differential
3, the transmission torque range is large. We know that the clutch plate will slip when the transmission torque is too large, so there will naturally be a torque limit. In addition, the structural strength of crown gear is lower than that of planetary gear, so the quattro with Torsten structure is stronger than the current quattro Ultra in off-road performance. Multi-disc clutch type central differential
Although the off-road performance of Audi's current quattro Ultra is not as strong as that of mechanical quattro, it has a natural advantage in fuel economy. At present, Audi quattro is a timely four-wheel drive, which is a precursor system in most cases. It will only intervene in four-wheel drive under extreme working conditions, which greatly reduces fuel consumption, but realizes 90% of the functions of mechanical quattro. So don't blame Audi for castrating the mechanical quattro. I am afraid that many car owners will never be able to drive the difference between two four-wheel drives. And I think the future four-wheel drive should not need a central differential or a central transmission shaft. The final four-wheel drive is to directly control the motors on the front and rear axles, so as to control the traction of each wheel of the vehicle respectively. Electric four-wheel drive on Audi electric vehicle E-tron