What are Full-Time 4WD and On-Demand 4WD?
1 Answers
Full-Time 4WD means that the vehicle's driving mechanism is always independently powered by all four wheels at any time. On-Demand 4WD refers to a driving system that only switches to four-wheel drive when appropriate, while remaining two-wheel drive under other conditions. Here is more detailed information: 1. Full-Time 4WD: Full-Time 4WD distributes driving force to all four tires through a flexibly connected central differential, and then via independent front and rear axle differentials. Unlike purely mechanical differential locks, Full-Time 4WD differentials can be either viscous coupling or multi-clutch types, but both allow for a speed difference between front and rear wheels, as well as between left and right wheels. Whether a vehicle has Full-Time 4WD entirely depends on the construction of its transfer case. As the core component managing different driving states of the vehicle, the transfer case largely determines the overall performance of the vehicle. 2. On-Demand 4WD: This is a driving system that only switches to four-wheel drive when appropriate, while remaining two-wheel drive under other conditions. The system automatically switches between two-wheel drive and four-wheel drive modes based on the vehicle's driving conditions, without requiring manual operation. On-Demand 4WD differs from Part-Time 4WD, which requires manual switching between two-wheel and four-wheel drive, and Full-Time 4WD, which is always in four-wheel drive under all operating conditions.
