Abstract: The invention relates to a method of estimating the load on a motor vehicle (10). The motor vehicle (10) having a wheel (12) comprising a tread (20) for rolling over a surface being driven on (14) and a first air chamber (32) in which there is a gas which by means of its gas pressure (G) counteracts de-formation of the tread (20) when the wheel (12) is rolling. The method lets gas into the first air chamber 32 over a predetermined period and estimates the load based on the change in pressure in the chamber. The object under-lying the invention is to provide a means of estimating the load on a vehicle. For this purpose the wheel (12) may have a second air chamber (38) coupled to the first air chamber (32) by a valve device (44), the first air chamber (32) extending between the tread (20) and the second air chamber (38) and the gas may flow from the second air chamber (38) into the first air chamber (32).

Abstract: The invention relates to a method of estimating the load on a motor vehicle (10). The motor vehicle (10) having a wheel (12) comprising a tread (20) for rolling over a surface being driven on (14) and a first air chamber (32) in which there is a gas which by means of its gas pressure (G) counteracts de-formation of the tread (20) when the wheel (12) is rolling. The method lets gas into the first air chamber 32 over a predetermined period and estimates the load based on the change in pressure in the chamber. The object under-lying the invention is to provide a means of estimating the load on a vehicle. For this purpose the wheel (12) may have a second air chamber (38) coupled to the first air chamber (32) by a valve device (44), the first air chamber (32) extending between the tread (20) and the second air chamber (38) and the gas may flow from the second air chamber (38) into the first air chamber (32).