All-wheel drive is the design of the car transmission, in which the torque from the engine is transmitted to all wheels of the car, i.e. all wheels are driving. Recently, many car manufacturers have started to use all-wheel drive as a means of improving the driving characteristics of conventional cars without solving the problem of increasing its cross-country ability. Such a car can be recycled under the program cash for cars etobicoke.
Types of all-wheel drive
Experts divide all-wheel drive systems into three types: permanent all-wheel drive (the torque is transmitted through a gearbox), switchable all-wheel drive (the torque is transmitted through a transfer case) and permanent on-demand all-wheel drive (that the connection is automatic or manual).
A car with all-wheel drive has absorbed all the advantages and disadvantages of front- and rear-wheel drive cars. This will manifest itself in the fact that in cases where the front-wheel drive car will require the driver to add gas and the rear-wheel drive car to dump it, then the all-wheel drive will require one or the other depending on such factors as: the weight distribution of the car, the strength of traction of the wheels with the road, the vehicle speed, type of all-wheel drive and weight of others. Driving an all-wheel-drive vehicle in critical situations requires the driver to have special equanimity and skill.
Vehicles with all-wheel drive switchable in most cases behave like rear-wheel drive cars. But a car with permanent all-wheel drive can be unpredictable and guessing what is required is difficult. The difficulty is that a four-wheel drive car loses directional stability unexpectedly and very abruptly.
In order to increase the driving safety of all-wheel drive vehicles, modern transmissions are equipped with an asymmetric drive system for the distribution of traction over the axles in a certain proportion so that the nature of handling becomes close to that of a front or rear-wheel drive car.
All-wheel-drive cars are superior on slippery surfaces to their mono-drive counterparts in terms of acceleration dynamics and easy start capability. They have better engine braking performance. On a snowy road, a four-wheel drive car will have better (often increased) cross-country ability.
What the experts say
The experts’ opinion is unanimous: on a winter road, only four-wheel drive will have good stability. And although modern systems are able to reduce the disadvantages inherent in the all-wheel drive inexperienced driver should take them into account and not bring the road situation to a critical situation.