In practice each vehicle driving currently on roads in any place in the world has less or more comfortable suspension. The vehicle suspension is a set of specific components that connect the wheels with the vehicle body. Its principal task is to ensure the best possible steerabilty and stability of each vehicle. The suspension consists mainly of components responsible for vehicle wheel fastening and steering. These components are, or at least should be, responsible for suspension geometry and include suspension arm and bars. The car suspension is also more and more modern springing components having an increasing effect on driving comfort and are commonly called springs. Depending on material quality and intended use, they may be soft or hard. Beside springing components, in each vehicle there are also components absorbing shocks and vibrations. These components are commonly called car shock absorbers or dampers. The suspension contains also various bolts, pins and swivel axles and sleeves.
Depending on car type and brand as well as its equipment there are various fan types managed properly by a fan controller. The best known and commonly used car fans are, of course, those of the cooling and air-conditioning systems. The purpose of the controller is to supervise fan operation and to signal any damages and defects, thus its reduced performance. The reduced fan performance entails deterioration of driving comfort and endangers the work of vehicle engine. An example is the fan working in the cooling system. This fan is responsible for keeping appropriate temperature of all cooling system components. The fan should not allow the cooling system components to become overheated. These components cannot be also too cold and therefore the proper control of fan operation is of such importance. In the case of fan control malfunctions, the consequences may be disastrous, including car engine overheating and immobilizing. In one word, the engine may be even damaged.