The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2012
Filed:
Jul. 12, 2004
Carsten Detlefs, Ronnenberg, DE;
Heinrich Diekmeyer, Barsinghausen, DE;
Frank-dietmar Lippelt, Barsinghausen, DE;
Joachim Reinhardt, Hannover, DE;
Bernd Strilka, Hannover, DE;
Carsten Detlefs, Ronnenberg, DE;
Heinrich Diekmeyer, Barsinghausen, DE;
Frank-Dietmar Lippelt, Barsinghausen, DE;
Joachim Reinhardt, Hannover, DE;
Bernd Strilka, Hannover, DE;
WABCO GmbH, Hannover, DE;
Abstract
An electronic compressed air system for vehicles includes a compressed air supply part having a compressor, a compressed air consumer part having load circuits forming an air-suspension circuit, and service-brake circuits having reservoirs. The load circuits are supplied with compressed air via solenoid valves. The pressure in the load circuits is monitored by pressure sensors whose signals are evaluated by an ECU that controls the solenoid valves. The solenoid valve of the air-suspension circuit does not include reservoirs and is closed in the de-energized normal state. The solenoid valves of other load circuits, especially of the service-brake circuits are open in the de-energized normal state. With a pressure demand of the air-suspension circuit, the associated solenoid valve is switched by the ECU to open position to establish communication with the compressed air supply part and/or with the service-brake circuits or with the reservoirs thereof, to refill the air-suspension circuit.