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公开(公告)号：EP1874604A1
公开(公告)日：2008-01-09
申请号：EP06725705.5
申请日：2006-04-11
发明人： VOGT, Michael , DROTT, Peter , KREBS, Stephan
IPC分类号： B60T17/18 , B60T13/565 , B60T11/224
摘要： The invention relates to a device for brake application (1) in a motor vehicle, said device comprising a main cylinder (2;140) and a pneumatic servobrake (3), one of the pistons (6;141) of the main cylinder (2;140) being stepped with two different-sized hydraulically active surfaces (A1,A2), and the active surfaces (A1,A2) being changed over by means of a valve arrangement (52) in the event of failure of the servobrake (3). The inventive device for brake application (1) is characterised in that an annular chamber (47;170) defined by the stepped piston (6;141) and the housing (4;143) is connected, by means of the valve arrangement (52), to either the pressure chamber (10;148), which is associated with the stepped piston (6;141), or a pressurised medium container (56); and the valve arrangement (52) comprises a first valve and a second valve (53,54) that can be switched according to the pressure of the working chamber (83,86) of the servobrake (3), the first valve (53) connecting the pressure chamber (10;148) to the annular chamber (47;170) in the actuated position, and the second valve (54) blocking the connection of the annular chamber (47;170) to the pressurised medium container (56) in the actuated position. The switching of the valve arrangement (52) according to the pressure in the working chamber (83,86) enables two other functions (overboost and cold start function) to be carried out, without having to take additional measures and without requiring additional components.
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公开(公告)号：EP1268245B1
公开(公告)日：2007-05-02
申请号：EP01933745.0
申请日：2001-03-23
发明人： DROTT, Peter , KRÄMER, Horst , KRANLICH, Holger , HOFFMANN, Jan
IPC分类号： B60T7/04
CPC分类号： B60T8/4081 , B60T7/042 , B60T11/20
摘要： The invention relates to an operating unit for an electrohydraulic braking system of the 'brake-by-wire' type, in the form of a tandem master cylinder, the first and second piston of which are each pre-tensioned by a return spring against the operating direction. The first pressure chamber of the tandem main cylinder is connected to a hydraulic chamber, defined by a simulator element. The simulator element also defines a simulator chamber, containing a simulator spring, connected to a pressure fluid reservoir. A valve device is provided which opens or closes the hydraulic connection between the simulator chamber and the pressure fluid reservoir. According to the invention, an operating unit may be economically produced and easily bled of air, whereby the simulator element is formed by a simulator piston (18), and the valve device is formed from a seal (24) arranged on the second piston (3) and the opening area of a channel, which forms the hydraulic connection (23) and which is formed within the range of movement of the seal (24).
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公开(公告)号：EP1658212A1
公开(公告)日：2006-05-24
申请号：EP04766409.9
申请日：2004-08-04
发明人： DROTT, Peter , KÖNIG, Harald , JUNGMANN, Udo , BISCHOFF, Andreas
IPC分类号： B60T11/236 , F16J15/16
CPC分类号： F16J15/3236 , B60T11/236 , F16J15/164
摘要： The invention relates to a cylinder, in particular for a motor vehicle hydraulic brake systems comprising at least one case (2) provided with a plunger piston (3) movable therein, at least one angular sealing collar (5) arranged in the snap ring groove (4) of the case (2), an internal lip (6) dynamically applied to the plunger piston (3) by a first sealing surface (8), an external lip (7) statically applied to the bottom of the snap ring groove (4) by a second sealing surface (9) and the back of the collar (17). Said invention is characterised in that the back of the collar (17) is not flat and is provided with at least one peripheral-sealing surface (18, 24).
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公开(公告)号：EP0886595B1
公开(公告)日：2001-10-04
申请号：EP97914290.8
申请日：1997-03-21
发明人： BAYENS, Mark , BERTHOLD, Thomas , DROTT, Peter , KRÄMER, Horst
IPC分类号： B60T13/72
CPC分类号： B60T13/72
摘要： The invention concerns a braking force booster for motor vehicles, the control valve (12) of which can, independently of an actuating rod (7) moving a valve piston (9), be actuated by an electromagnet (20) which in turn actuates a third sealing seat (24), the movement of which against the direction of actuation of the brake booster makes it possible to aerate the working chamber (3). In order to eliminate all force components of pneumatic components during external actuation, according to the invention there is a permanent pneumatic connection between a pneumatic chamber (17) bounded by the valve body (10) in the control housing (5) and the underpressure chamber (4), and both a second sealing seat (16) formed on the valve piston (9) and aerating the working chamber (3) and the third sealing seat (24) and the component (sealing lip 13) of the valve body (10) bounding its pneumatic chamber (17) in the control housing (5) are virtually of the same diameter.
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公开(公告)号：EP0847353B1
公开(公告)日：2000-11-29
申请号：EP96917480.4
申请日：1996-05-31
发明人： KRÄMER, Horst , GONZALES, Jose , VOGT, Michael , DROTT, Peter , KLEY, Uwe
CPC分类号： B60T13/72
摘要： Proposed is a servobrake for motor vehicles, the control valve (12) of which can be actuated by an electromagnet (20) independently of an actuating rod (7) which pushes a valve piston (9), the electromagnet (20) actuating a third sealing seat (24), thus enabling the working chamber (3) to be vented. The body (10) of the control valve (12) has passages (19) which allow pneumatic pressure compensation. To eliminate a pneumatic force component counteracting the force initiated by the electromagnet (20) the invention provides that the passages (19) are set radially outside the region delimited by the electromagnetically actuated sealing seat (24) on the sealing face (44) of the valve body (10).
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公开(公告)号：EP0828642B1
公开(公告)日：1999-08-04
申请号：EP96917466.3
申请日：1996-05-30
发明人： DROTT, Peter , STÖHR, Frank , KRÄMER, Horst
IPC分类号： B60T13/72
CPC分类号： B60T13/72
摘要： A vacuum brake servo for motor vehicles has a servo housing (1) with a movable wall (2) and a control housing (9) that carries the movable wall (2). The control housing (9) has a main part (13) arranged in a guide pipe (15) together with a cover part (14) axially inserted on the main part (13). An electromagnet (11) for driving a control valve (8) is arranged in the control housing (9). One axial side (16) of the electromagnet (11) is mounted in the main part (13) and its other axial side (17) is mounted in the cover part (14). The cover part (14) is provided with axially projecting centring segments that elastically deform and centre in a play-free manner the main part (13) when the control housing (9) is assembled.
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