Robert Boschgmbh

Robert Bosch Technology Corporation

Stéphane Lacroix

Philippe Richard

Ulysse Verbo

Jean-Charles Maligne

Juan Simon Bacardit

Jean Pierre Gautier

Chris Anderson

Raynald Sprocq

Olivier Castello

Fernando Sacristan

Antony Auguste

Jean-Pierre Michon

Daniel Grech

Jean Fourcade

Marc Noblet

Omar Brahmi

Nicolas Quiniou

Lionel Bourgois

Cyril Divoux

Jean Marc Attard

A method of detecting the braking of a vehicle comprising a push rod () intended to transmit an amplified braking command to a master cylinder. A plunger (), arranged parallel to the primary piston () so as to reproduce the movements of this piston, and a sensor () which senses the movements of the plunger (), this sensor () being fastened to the booster (), are used to detect a braking operation by detecting a movement of the plunger ().

Method and booster which are intended to detect the braking of a vehicle, and method of producing such a booster

Our problem relates to a master cylinder with a U-shaped seal. Our goal is to avoid defective bleeding of hydraulic braking systems. The defects arise out of the fact that the vacuum causes the lips of the seal () to stick together and to stick against the wall (). To achieve this, reliefs () will be created on one wall () of one lip () facing the other lip () and on the edge face () of this same lip. These reliefs will prevent the lips from sticking tightly to one another and to the wall facing the edge face of the lips. This lack of sticking will prevent a vacuum from being created between the two lips and between the edge face of the lips and the wall (). As a result, the seal will be able to return to a position in which bleeding can be performed effectively.

Master cylinder with U-shaped seal

A pneumatic servomotor for power-assisted braking for a motor vehicle having a control rod () for opening and closing at least one axial inlet valve () that is interposed between a front chamber () connected to a pressure source having a pressure (Pa) greater than a first pressure (P) and a back chamber () and at least one axial balancing valve () for actuating a moving partition () located between the front chamber () and the back chamber (). The servomotor being characterized by one-piece floating tubular element () having axially offset transverse faces () that have sealing elements () for sealing the axial inlet valve () and the balancing valve () with the control rod () being activated by a dish-shaped washer () carrying two springs () of different stiffnesses.

Brake servo-unit comprising a floating element bearing offset valve seats

A method and structure for connecting a pneumatic booster (S) to a brake pedal (F) by nesting a second element () inside a second element () of a control rod (). The second element () is held one inside the first element () by a spring clip () that is housed in a circular groove () of an adapter () to define an elastic attachment and allow for play to be taken up to stabilize the connection.

Pneumatic brake booster provided with a control rod and method for mounting same

Braking device including a master cylinder (), a primary piston (), a control member (), a booster () coupled to the control member (), and an assist valve (VA) defined by a reaction piston () with a bore () therein for receiving a ratio control member (). The control member () has a piston () with a head () located in a chamber () between the reaction piston () and a bushing () retained in the bore (). The bushing () has an axial passage () that receives a head () of piston () to form a valve () for closing an inlet to a passage () in the piston (). The bushing () slides within bore () to limit a pressure difference between the chamber () and a front part () of the bore () to a value below a pressure difference that causes the valve () to open.

Brake booster device for motor vehicle

A pneumatic brake booster for a motor vehicle, of the type in which the movements of a control rod () are able to determine the openings and closings of at least one axial intake valve () which is inserted between a pressure source subjected to the pressure (P) higher than the first pressure (P) and a rear chamber () of the booster, and of at least one axial equalizing valve () which is inserted between a front chamber () and the rear chamber (), to actuate a moving partition () inserted between the front chamber () and the rear chamber (), characterized in that it comprises a tubular element () of which axially offset transverse faces () comprise first elements () for sealing the axial intake and equalizing valves () and that the control rod () is able to operate via two concentric springs () having different stiffnesses.

Pneumatic booster comprising tubular intake and equalizing valves

A pneumatic brake booster for a motor vehicle wherein movements of a control rod ( ) determine the openings and closings of at least one axial intake valve ( ) and at least one equalizing valve ( ). The intake valve ( ) being inserted between a pressure source subjected to the pressure (P ) higher than the first pressure (P ) and a rear chamber ( ) of the booster, and the equalizing valve ( ) being inserted between a front chamber ( ) and the rear chamber ( ) to actuate a moving partition ( ) located between the front chamber ( ) and the rear chamber ( ). A tubular element ( ) of that is axially offset transverse faces ( ) comprised of first elements ( ) for sealing the axial intake and equalizing valves ( ).

Pneumatic booster

Power-assisted braking device with a variable assistance ratio

Growing community of inventors

Tournan en Brie, France

Stéphane Lacroix