Which is better, time sharing four wheel drive or all terrain four wheel drive

The four-wheel drive system is generally divided into: full-time four-wheel drive, time-sharing four-wheel drive and timely four-wheel drive.

Full-time four-wheel drive refers to the mode in which the vehicle maintains four-wheel drive throughout the driving process. This drive mode has good off-road and handling performance, but it cannot make adjustments to torque distribution according to road conditions, and the fuel consumption is too high and the economy is poor.

Part-time 4WD is a drive mode that is manually switched by the driver, and the driver can choose between two-wheel drive or four-wheel drive mode by turning the transfer case on or off. This is the most common drive mode in SUV models, and its advantage is that it can not only ensure the power and passability of the vehicle, but also take into account the fuel economy.

Just-in-time four-wheel drive, also known as real-time four-wheel drive, is a technology developed in recent years, which controls the switching between two-wheel drive and four-wheel drive by a computer chip. The salient feature of this system is that it inherits the advantages of full-time 4WD and part-time 4WD while making up for their shortcomings. It can recognize the driving environment on its own and control the switching between two-wheel drive and four-wheel drive modes according to changes in the driving environment.

On bumps, slopes and bends, the vehicle is automatically set to four-wheel drive, while on flatter road conditions such as urban roads, the vehicle switches to two-wheel drive on its own.

What is the difference between timely four-wheel drive, time-sharing four-wheel drive, and full-time four-wheel drive? Which is better?

Time-sharing four-wheel drive, full-time four-wheel drive, and timely four-wheel drive have their own characteristics, time-sharing four-wheel drive is rough, hard, durable, and the cost is controllable, but the highway performance is almost none; The full-time four-wheel drive performance is strong, both on-road and off-road, but the tow differential is too precise and the cost is not low; Timely four-wheel drive function more, but the strength is general, the advantage is that it is relatively cheap, ordinary riders can bear it, rain and snow and other bad weather can improve a certain driving safety, off-road ability is almost none, but driving SUV off-road itself is irrational.

The difference between timely four-wheel drive, time-sharing four-wheel drive, and full-time four-wheel drive: high-intensity extreme off-road, time-sharing four-wheel drive is the king; Timely four-wheel drive is economical and applicable, and suburban roads are more suitable; Comprehensive road conditions, full-time four-wheel drive is more versatile.

1. High-intensity extreme off-road, time-sharing four-wheel drive is the king.

Time-sharing four-wheel drive is time-sharing four-wheel drive, that is, it can be two-wheel drive, four-wheel drive, and the switch between two-wheel drive and four-wheel drive is completed by the transfer case. In the driving environment with good road conditions such as asphalt roads and hardened roads, the vehicle is in two-wheel drive mode to increase the vehicle's off-road ability.

Because the transfer case and the front and rear drive shafts are rigidly connected, without the best differential function, if the time-sharing four-wheel drive vehicle is equipped with a differential lock between the front and rear axles, then, whether the axle or the bridge is a rigid connection, there is no waste of power, and the off-road performance is upgraded to a higher level.

2. Timely four-wheel drive is economical and applicable, and suburban roads are more suitable.

When the vehicle skiddies or is in a bad section, the computer will automatically detect and issue instructions to the engine, and the vehicle will switch from two-wheel drive to four-wheel drive to improve the vehicle's passing ability. Since the driving mode switching of the four-wheel drive at the right time is managed by the on-board computer, it is relatively simple to use.

In terms of use scenarios, timely four-wheel drive is more suitable for roads with generally good road conditions, and can improve the driving performance of the vehicle in the face of sudden skidding and potholes.

3. Comprehensive road conditions, full-time four-wheel drive is more versatile.

Full-time four-wheel drive means that the vehicle is always in a four-wheel drive state, and the power of the vehicle is transmitted to the front and rear drive shafts through the ** differential, and then the power is transmitted to the wheels through the independent differential of the front and rear axles. Different from the pure mechanical connection of the time-sharing four-wheel drive, the full-time four-wheel drive has a wheel-lifting "good-natured power butler"** differential flexibly connects the front and rear axles, allowing the front and rear wheels to have a speed difference.

Introduction to full-time four-wheel drive

All the time there is a four-wheel drive function. Full-time four-wheel drive is generally equipped with high-end SUVs and sedans, such as Grand Cherokee, Range Rover, Mercedes-Benz S, Audi A8 and other models, so that the car is like a Mercedes-Benz horse anytime and anywhere.

Because it is necessary to take into account the difference in the speed of the front and rear wheels when the car turns, as well as the power distribution of the four wheels in various situations, and it must be fully automatic, the structure of the full-time four-wheel drive is more complex, and the cost is naturally expensive.

Real-time 4WD good:

1. Since the front and rear axles are rigidly connected, the speed must be the same. Therefore, the time-sharing four-wheel drive needs to absorb the speed difference through the slippage of the wheels when cornering, and the sharper the corner, the more obvious the performance. If it is on a road with very good grip, it is impossible to turn at all (the wheels do not slip), so the time-sharing four-wheel drive cannot drive smoothly on the road with good grip;

2. Full-time four-wheel drive, as the name suggests, means that the four wheels have a driving force at any time. Not only do you have the familiar open differential between the wheels, but you also need a ** differential between the front and rear axles. Since all four wheels are powered, full-time four-wheel drive vehicles will have better traction;

3. For example, the Wrangler is a rear-wheel drive car in two-wheel drive mode, and the front wheels have no power, which is equivalent to "the rear wheels push the front wheels to run", while the Grand Cherokee is "all four wheels are running", in comparison, the Grand Cherokee is obviously more stable to handle.