What are the main differences of AWD and 4WD transmissions and what are their advantages over each other?

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In the modern world of the automotive industry, a four-wheel drive of the car is denoted by AWD and 4WD abbreviations. Which of these two variations are predominantly choosing drivers today, and for what reasons — we will analyze below. Including, consider what the main differences in these types of drives.

4 W D is a type of all-wheel drive 4×4, in which the motorist independently establishes the version of the differential operation.

The modes provide a differential lock, switching on a lower row or redistribution of loads on one of the axes in embodiments 50 to 50 and 55 to 45. This type of drives has conventional and reduced transmissions included in manual or automatic.

This type of transmissions has proven itself in cases where the car is stuck in the snow or dense dirt. 4WD is installed on a range of high-pass vehicles, they have permanently included axles: Land Rover, Niva, Jeep.

Four-wheel drive 4 to 4 issues torque with three differentials — behind, in the middle and ahead. The coupling and «rattling» take part in its functionality. All this provides practically trouble-free functionality in a variety of road situations and at elevated thrust.

The modes of operation of this type of suspension have a number of variation: high thrust on a bad road surface produces a low operating mode, the usual is used on a wet asphalt road, gravel and buried sand.

Set 4 W D transmission on cars steel from a thousand nine hundred and sixth year. However, the real breakthrough in its application happened twenty years later, when this type of suspension was established on a m with Eagle American production. It is his four-wheel drive rightly considered classical.

The main feature of such a transmission was considered the differential of the inter-axis, he is also viscous food. It was installed in the center of the car and filled with high viscosity fluid.

With its functionality, the viscous food ensured a smooth distribution of torque from the engine in the axis. The magnitude of the moment completely depended on the rotation of the input. and exit. Shafts, namely from the difference in speeds of rotation.

In the past few years, 4WD drive car manufacturers began to install very rarely. All this is associated with the high cost of this type of transmissions. In addition, the application of the dispensing box is minimized, since everything is still tied to electronic control computers, which themselves follow the speed of rotation of the vehicle wheels and choose the appropriate driving mode.

4WD transmission is two options: permanent or complete, with such a type of work, all four wheels are spinning continuously (except those designs where the driver himself distributes efforts along the axes of the car). The connected drive, the most frequent 4WD, is installed on vans, cargo cars that work in difficult conditions and SUVs.

In this type of transmission, the car is moved with two driving wheels, but when the full drive is turned on, all four wheels become leading.

Monolar AWD Modern Type of Transmissions Assembly, which is more common now on the car market. It is installed on most of the latest sedans, crossovers and SUVs, such as Audi S 4, Renault Duster, Subaru Forester, Hyundai Creta. Cars with such a type of transmissions in the daily road situation are driving on one drive, the second is sometimes connected in difficult situations.

Cars with type AWD transmission is considered to be SUVs, but in fact it is not SUVs. All wheels are rotating only occasionally, and not permanently. Efforts through the axes with this execution of the drive is 60 by 40 mainly on the front-wheel drive. On Subaru, Audi and Identical Auto, the distribution is 50 to 50.

A WD drive is represented by two options: permanent drive that automatically distributes torque to all axis, providing high pendant in snow, in ice and in dirt. Connected drive, the moment leaves only on one axis, it depends on the variety of cars, the rear / front bridges.

In cars with AWD there are many sensors that transmit pulses to the control unit. In the new world, the car is of course the unconditional plus. The driver of such a car itself does not choose the mode of operation of the transmission, this makes the control unit for it, the computer decides which of the axes it is necessary to connect depending on the situation.

Most drivers believe that such a drive is the worst solution for a good SUV.
Car owners consider the 4WD drive a perfect option for bad roads.

This type of suspension is established on real SUVs and tractors. This type of suspension perfectly works in degraded road conditions. In truth, auto 4×4 is tougher in management, consume more fuel and of course stand much higher than the car with AWD.

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