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Motor vehicle equipped with a pneumatic level control system

  • US 8,219,262 B2
  • Filed: 04/08/2006
  • Issued: 07/10/2012
  • Est. Priority Date: 04/21/2005
  • Status: Active Grant
First Claim
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1. A pneumatic level control system (12) in a motor vehicle (10) having a vehicle battery (44) and a generator (46) supplying the vehicle battery (44), and an electrically operated compressor (18) with an electric motor (16), which compressor is assigned to the level control system (12), the electric motor (16) of the compressor (18) being supplied with power by the vehicle battery (44) and/or the generator (46) only under certain conditions,wherein a controller controls operation of the level control system (12) based on an energy requirement of the level control system (12) for at least one pending operation is estimated in advance, wherein the at least one pending operation is performed by the pneumatic level control system (12) only when the present energy status of the vehicle battery (44) exceeds the energy requirement of the at least one pending operation by at least a first threshold value and a level of the vehicle is adjusted to an intermediate level, lying between a desired set level and the present vehicle level, such that the energy status of the vehicle battery (44) exceeds the first threshold value once the intermediate level has been reached in response to a determination that the at least pending operation exceeds the first threshold value.

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