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:
Mar. 22, 2011
Filed:
Jun. 17, 2005
Jürgen Schonlau, Walluf, DE;
Manfred Rüffer, Sulzbach, DE;
Jose Gonzales, Bad Oeynhausen, DE;
Continental Teves AG & Co., OHG, Frankfurt, DE;
Abstract
The brake actuation device of a motor vehicle brake system includes a pneumatic brake booster, the interior of which is subdivided into at least one vacuum chamber and one working chamber, a master brake cylinderand a pneumatic motor-and-pump assemblyfor providing the vacuum in the vacuum chamber, which has a vacuum pumpand a motordriving the vacuum pump. A vacuum level in the vacuum chamber or a difference in pressure between the vacuum chamber and the working chamber is sensed using a sensor, and the motor-and-pump assemblyis enabled by an electronic control unitwhen the vacuum falls below a first defined bottom vacuum level Pe in the vacuum chamber and is disabled when a second defined top vacuum level Pa is reached. The rotational speed np of the motor-and-pump assemblyis controlled depending on driving conditions of the vehicle.