Patent ID: 7600988
Filing Date: 2009-10-13
Classification: F04B,F04D

Abstract:
1. Air procuring system of a commercial vehicle, comprising: an air-demand-controlled compressor arrangement, including a motor unit for generating a rotating movement which, by way of an interposed rotational-speed-transmitting transmission unit, drives a compressor unit for generating compressed air from the ambient air used in one of a braking system, and an air suspension system of the commercial vehicle; an output compressed-air line of the compressor unit connected to a compressed air system supplying air to one of the braking system and suspension system of the commercial vehicle; a control unit for reducing a rotational speed of the compressor generating compressed air when a no-load condition is determined in one of the braking and air suspension systems and for increasing a rotational speed of the compressor when a compressed-air demand is determined, to meet the compressed air demand of the one of the braking and air suspension systems; wherein the transmission unit is constructed in the manner of a transmission whose rotational speed is variable, and the control unit interacts with the transmission unit in order to adapt the rotational speed of the transmission unit to meet the compressed-air demand of one of the braking system and suspension system of the commercial vehicle; and further wherein the compressed-air demand and the no load condition are determined via a mechanical or electric pressure sensor determining the actual pressure, the control unit connected with the pressure sensor signals a compressed-air demand precisely when the actual pressure falls under a predefined desired pressure, for triggering the transmission unit.