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:
Sep. 07, 1999
Filed:
Nov. 25, 1996
Wolf-Dieter Jonner, Beilsein Schmidhausen, DE;
Helmut Pueschel, Marbach, DE;
Thomas Isella, Markgroeningen, DE;
Karl-Heinz Willmann, Freiberg, DE;
Rolf Hummel, Steinenbronn, DE;
Elmar Mueller, Markgroeningen, DE;
Johann Herr, Vaihingen, DE;
Roland Holzmann, Moeglingen, DE;
Guenter Dzierzawa, Margaretenweg, DE;
Martin Moehle, Steinheim, DE;
Hans-Juergen Herderich, Kernen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a hydraulic vehicle brake system with a master cylinder, with two brake circuits (I, II), with wheel brakes connected to the brake circuits (I, II), and with a wheel slip regulator device disposed between the master cylinder and the wheel brakes, which device has at least one brake pressure modulation valve device and at least one high pressure pump, and with a pump unit associated with this high pressure pump. In the automatic braking operation by means of at least one of the high pressure pumps, the pump unit is used for supplying hydraulic fluid to the high pressure pump. The pump unit has a low pressure pump in the form of a gear pump. To limit the pressure at an outlet of the low pressure pump at least one return flow conduit is provided between this outlet and an inlet, which conduit, in a manner according to the invention constitutes a throttle by which the choice of its cross section, which throttle is for controlling at least one return flow which increases with increasing pressure at the outlet and as a result achieves the pressure limiting. The hydraulic vehicle brake system can be used for cars, minibuses, and small trucks.