Is the Panamera a Full-Time Four-Wheel Drive Vehicle?
1 Answers
The Porsche Panamera is a full-time four-wheel drive vehicle. Introduction to Full-Time Four-Wheel Drive: Full-time four-wheel drive refers to a vehicle maintaining four-wheel drive throughout the entire driving process, with the engine's output torque distributed to the front and rear wheels in a fixed proportion. This drive mode ensures excellent off-road and handling performance at all times, but it cannot adjust torque distribution based on road conditions and has higher fuel consumption. In contrast, real-time four-wheel drive is controlled by a computer chip to switch between two-wheel drive and four-wheel drive. On normal road surfaces, the vehicle operates in two-wheel drive mode. When encountering off-road conditions or wheel slippage, the computer detects and automatically distributes power to the other two wheels. Basic components of full-time four-wheel drive include: a planetary gear-type inter-axle differential with fixed torque distribution and an additional viscous clutch, an electromagnetic clutch that automatically locks when speeds differ (electronically controlled), an electronically controlled multi-plate clutch (Haldax clutch), a viscous clutch in the driveshaft power transmission line, and the selection of the initially non-driven axle based on tire slippage.
