Patent ID: 8220876

Claim:
An electronic compressed air system for a vehicle comprising: a compressed air supply part including a compressor; and a compressed air consumer part, said compressed air consumer part including: a plurality of service-brake circuits having compressed air load circuits and compressed air reservoirs; a high pressure compressed air load circuit; electrically actuatable valves comprising a first plurality of electrically actuatable valves and at least one other electrically actuatable valve, said first plurality of electrically actuatable valves being operable to supply compressed air to said plurality of service-brake circuits, said at least one other electrically actuatable valve being operable to supply compressed air to said high pressure compressed air load circuit, and said first plurality of electrically actuatable valves being in an open position in a de-energized condition during normal driving; sensors for monitoring pressure in said plurality of service-brake circuits; and an electronic control unit configured to evaluate electrical signals from said sensors and to control said electrically actuatable valves, said at least one other electrically actuatable valve operable to supply compressed air to said high pressure compressed air load circuit being switchable by said electronic control unit between a closed position in a de-energized condition during normal driving and an open position to establish communication between said at least one other electrically actuatable valve with at least one of (i) said service-brake circuits (ii) said compressed air reservoirs and (iii) said compressed air supply part, when compressed air is requested for said high pressure compressed air load circuit.