Individual motor skills: the future of the four-wheel drive system?
If you are not familiar with the operation of a system has four-wheel drive, here’s a summary. On a normal car, engine running, and this movement is transferred to the front wheels or rear, with the help of the gearbox. However, on a vehicle has four-wheel drive, the movement is transferred from the engine to four wheels thanks to a transmission and other components called transfer case. The important point here is that the movement of the four wheels is controlled by a single motor.
There is another possibility, that may know a renewed popularity. This is a system has four-wheel drive that works with the help of four electric motors, one per wheel. The advantage of such a system really is superior to a conventional integral cog, since it allows a better control of the torque of each wheel.
Imagine a modern conventional car: the computer detects some wheels lack of adhesion, and must try to rectify by sending the couple of wheels that they have strength, has the help of the differential, in particular. The operation is not instantaneous, and therefore, we can get caught …
While in a car or motor skills is independent of the wheels, the computer can instantly adjust the torque to each wheel as possible minimizing the loss of adhesion.
Besides, the company Hydro Quebec is already working on a concept wheel motor, a small electric motor that powers each with its own wheel, to install four of these engines on a car.