Goodyear commercializes a self-inflating tire
Goodyear's Air Maintenance Technology (AMT) system automatically keeps tires inflated to the optimum pressure without the need for any external pumps or electronics. Rather, all the system’s components are contained within the tire itself. The heart of the system is an internal regulator that detects when the air pressure drops below a pre-specified psi and then opens up to allow air from outside the tire into the pumping tube. Air is pushed through this tube to the inlet valve and ultimately into the tire cavity by the deformation of the tire as it rolls over the road.
Goodyear is initially aiming its AMT system at commercial vehicle fleet operators, citing 2008 figures from the American Trucking Association that more than half of all truck and trailer breakdowns for such operators involve a tire in some way, making tire-related costs the single largest maintenance item for fleet owners. The simple act of keeping tires properly inflated can cut costs by improving fuel economy and prolonging tread life.
Source: gizmag.comAdded: 3 October 2012