Self inflating pneumatic tire
According to a survey by the AAA website, about 80% of all road vehicles have one or more tire inflation problems. The normal running of the vehicle (especially in the encounter on the road potholes or the edge of the road when) and seasonal variation of permeability and temperature will lead to leakage of tyre. In winter, the tire's kPa drop by one to two units a month, and fall more during the summer. What's more, they can't tell how inflated they are by visual inspection alone. A tire pressure measuring device must be used. Insufficient gas not only can cause damage to the tires, but also increase fuel consumption, affect the way the car runs, and lead to potential safety problems. There are a variety of tire pressure technology on the market, and some of the technology will soon be available. According to the American tire pressure safety act, all vehicles will have to be equipped with a tire pressure monitoring system in the near future. In this way, the driver will be able to know tire pressure in time.This type of pressure monitoring system has been around for decades and has become standard in some models. They simply monitor the pressure of each tire on the car and notify the driver when the tire pressure is below a preset optimum pressure. Some types of valves are used to isolate the tires so that other tires will leak when checked or inflated.
CTIS's design concept is to improve the vehicle's performance on different road surfaces by controlling the pressure in each tire. For example, reducing air pressure in a tire increases the area of contact between the tire and the ground, thereby allowing the car to travel more easily on a softer floor. This can also reduce damage to the road surface. For construction sites and farmlands, this approach is significant. As the driver can directly control the air pressure of each tire, the maneuverability of the vehicle is greatly improved.Another function of CTIS is to maintain the internal pressure of a tire when it is slowly leaking or punctured. When such a situation occurs, the system automatically controls the charging process based on the specific pressure set by the pilot.The makers of CTIS are two: the GIAT in the United States (Dana Corporation) and the French Syegon (a division of the ground industries arms Group Corporation). Dana's CTIS comes in two models: the military CTIS (developed by PSI) and the tire pressure control system (TPCS) for commercial heavy machinery.
Some methods are used to check the tire pressure. In most cases, they use central sensors to pass information to the electronic control unit and then notify the driver.There is a gas source, usually the existing system on a vehicle, such as a brake or pneumatic system. However, when using existing systems, they must ensure that the original functionality of these systems is not affected. To this end, there will be corresponding safety inspection measures. First of all, make sure that there is enough air pressure for the main use of the gas source before you can inflate it.Must be able to transfer air from the air source to the tire (usually through the shaft tube). Some systems use a sealed hub tube and connect the hub with the tire valve by the hose. Other systems allow the inner tube to pass directly through the axle tube and use the axle tube as a vent pipe.A pressure relief hole must be provided for removing air from the tire without damaging the hub or rear axle seal. CTIS: the internal structure was as early as 1984, and the General Company (GM) used CTIS on the CUCV Trail Blazers and pickup models. CUCV is the abbreviation of commercial Cargo (Commercial Utility Vehicle), which has been used by the US Army since the middle of twentieth Century. They are actually equipped with some special military equipment on the basis of standard size Chevrolet, Blazers and pickup models.
