Compared to the comfortable driving, high speed, and low fuel consumption of sedans, 4×4 off-road vehicles boast features that sedans envy, such as high ground clearance, excellent visibility, and the ability to traverse rough terrain with ease. Below is an introduction to Jeeps: 1. Principle: Off-roading is not only for military use but also for mining purposes. Many mining vehicles are full-drive, with three axles and no front drive being more common, as load-bearing is also an issue. Hauling dozens to hundreds of tons of ore poses design challenges for two-axle vehicles. The principle of the differential is that if one wheel loses sufficient friction, it will spin at double speed. Usually, full-drive can solve this problem, but to further enhance performance, a differential lock is needed to lock the differential effect. This feature is not very useful and is not complex; tractors designed for southern paddy fields all have this device. Having this in a car is essentially a meaningless 'full configuration,' much like a cigarette lighter, which is rarely used. 2. Comfort: Another basic principle is comfort, which is directly related to the wheelbase. The geometric principle is easy to understand: the farther the wheelbase, the smaller the body swing angle when the front and rear wheels pass obstacles sequentially. If the two wheels are 100 meters apart, when driving over a brick, the passenger's position only moves up and down, which can be mitigated by springs, and there is almost no rocking chair-like 'forward and backward' angle change.
