Robert Boschgmbh

Francois Gaffe

Philippe Richard

Bastien Cagnac

Laurent Lhuillier

Antony Auguste

Olivier Bernadat

Andreas Weh

Juergen Tandler

Andrew Paul Wasson

Jean-Marc Ritt

Philippe Come

Dieter Pflaum

Eligiusz Stefaniak

Roman Winkler

Xingyuan Wang

Remi Demerssemann

David Patarra

Maciej Szymanski

Piotr Lasmanowicz

A system includes a helper piston that includes an axial sleeve that is integral with a guide bracket and that has a threaded exterior surface; a translationally fixed but rotational translation nut that has internal threads that complement those of the helper piston and that supports a gear connected to a drive motor; a plunger piston pushed by the helper piston and connected to a control rod; a trigger spring between the helper piston and the stop carried by the control rod for triggering brake assistance; a stop including a stop sleeve and a flange that is applied to the trigger spring, where the body of the control rod has a crimping area for securing the stop by crimping in an adjusted compression position.

Electric motor brake assist system

A brake fluid container system for fastening on the upper side of the valve block of the braking system, the block including a rear side, a conducting side and a front side in the longitudinal installation direction of the block in the engine space of the vehicle. On its rear corner, the upper side of the container includes a transverse axle, and in the longitudinal distance equal to the distance of the front and rear sides of the block, the underside supports a fastening tab. On its rear wall, the block includes a transverse bracket for accommodating the axle of the container, and on the front side, a fastening point for the fastening tab of the container.

Brake fluid container system assigned to the block of the actuator of the braking system

An electromechanical brake assist system driven by an electric motor cooperating with a master cylinder and having, along the axis of actuation, a helper piston in the shape of an axial sleeve solidly connected with a guide bracket and having a threaded surface. A nut, fixed in translation but free to rotate, has interior threads that complement those of the helper piston, which it receives, and exterior teeth that cooperate with the drive motor. A plunger piston carries a drive base so it can be pushed by the piston. Its other extremity is connected to the control rod, formed from a body and a head. The body has a crimping area and the head has a sleeve with an extremity that can be crimped along the crimping area.

Electromechanical brake assist system

A brake assist system comprising an intermediate spring combined with a compression thrust bearing, limiting the compression to a force greater than the response of the brake pedal under normal operating conditions. The spring and its compression thrust bearing are placed between the plunger piston () and the helper piston so that the spring transmits the thrust from the helper piston to the plunger piston that pulls the pedal under normal braking conditions. The helper piston pushes the plunger piston by way of the compression thrust bearing when the response of the plunger piston exceeds the compression threshold. A contact detector detects the contact between the helper piston and the thrust bearing.

Brake assist system

A transmission device for controlling the translational movement of an element includes: an exterior planetary gear equipped interiorly with teeth; an interior planetary gear connected to the controlled element and bearing a rack in the direction of translation; a satellite carrier having satellites with helical teeth engaged with the interior teeth; and a stationary housing accommodating the exterior planetary gear, the interior planetary gear, the satellite carrier. The rack is used to control the translational movement of the interior planetary gear. The transmission device is driven by a motor with a transmission acting either on the exterior planetary gear or the satellite carrier.

Transmission device for controlling the translational movement of an organ and brake system equipped with such a transmission device forming a brake booster

A brake-assist device for a motor vehicle having a servomotor is described. A servomotor has a plunger piston, a moving part, and an arrangement to move the moving part into position with respect to the plunger piston. The servomotor is actuated by a control rod. The control rod has a first end that presses upon the plunger piston and a second end to receive a force exerted by a brake pedal intended to be moved by a driver of the vehicle. The servomotor includes a sensor interposed in a contact space between the plunger piston and the moving part. A spring is compressed between the plunger piston and the moving part. The servomotor includes an arrangement for displacing the plunger piston in the contact space based on the driving mode. A stiffness of the spring is sufficiently high for an onset of braking to occur only with a striking force that is significantly higher during a reactive driving mode than it is during a calm driving mode.

Brake assist device and motor vehicle comprising such a device

An electric brake booster includes an electric motor activating a booster piston acting on the master-cylinder during brake pedal activation. The booster piston is driven in the direction of the action of same on the master-cylinder by an electric motor linked to a mechanical transmission that includes a screw held by the motor shaft. The screw meshes with two symmetrical worm gears that are integral with respective transmission shafts housed in a bearing of the body of the brake booster. The two shafts each carry a spur gear that meshes with a rack of the booster piston. The shafts are free in translation relative to the screw and to the body of the electric brake booster but are integral with each other in the translational movement of same. The shafts are integrally connected in translation by a coupling member formed by a crosspiece carrying two rotation bearings.

Electric brake booster with transmission clearance compensation

A brake system is described with a master cylinder actuated by a control rod connected to a plunger piston and an actuator piston acting directly on the primary piston. A hydraulic reaction piston is housed in the piston so it can be subjected to the pressure of the primary chamber and to the opposing action of a reaction spring. The plunger piston can push the reaction piston directly to push the master cylinder.

Vehicle brake system with an electric servomotor and hydraulic reaction piston

Brake installation consisting of a master cylinder associated with a brake booster furnished with a motor driving an actuator piston and acting on the primary piston of the master cylinder by means of a reaction disk against which the piston rests. For a safety operation, the hydraulic actuator connected to the control rod actuated by the brake pedal rests on the rear face of the reaction disk. The actuator piston is combined with an auxiliary piston in order to interact with the reaction disk and it is guided by its sleeve-shaped portion in a bore of the body of the brake booster. An adapting shim is supported by the auxiliary piston in order to receive as a support the end of a rear rod, secured to the primary piston of the master cylinder. The thickness of the assembly formed by the adapting shim and the auxiliary piston is defined on mounting of the master cylinder and of the brake booster as a function of the free travel measured previously.

Brake installation with master cylinder and brake booster but no push rod

Brake master cylinder () for a motor vehicle, of the type which comprises a substantially axial body () inside a bore () of which is slideably mounted at least one axial piston, of the type in which the bore () comprises two seals, front and rear, interposed between the piston and the bore (), characterized in that it comprises at least one wide groove () which is formed in the bore () in front of a groove () for retaining the front seal, which extends at least in part around the piston, and which communicates with said retaining groove () and the hole in the piston, in order to allow resupplies to occur with a high flow rate.

Master cylinder comprising a helical resupply groove

Brake master cylinder () for a motor vehicle, of the type which comprises a substantially axial body () inside a bore () of which at least one axial piston is slideably mounted, of the type in which the bore () comprises two seals, front () and rear, interposed between the piston and the bore (), the seals () comprising three radially concentric lips accommodated in grooves () in the bore (), characterized in that front faces of the grooves () are configured at least in part as a slope.

Master cylinder comprising a resupply-promoting seal

Brake master cylinder () for a motor vehicle, of the type which comprises a substantially axial body () inside a bore () of which at least one axial piston is slideably mounted, of the type in which the bore () comprises two seals, front () and rear, interposed between the piston and the bore (), the seals () comprising three radially concentric lips accommodated in grooves () in the bore (), characterized in that the seals () comprise central lips of reduced cross section.

Master cylinder comprising a seal and an associated groove promoting resupply

A quick-coupling device having a support () on which a female member () is mounted in a manner to move between a position of retaining a male member (E) in a position fitted into the female member () to a position of releasing the male member (E) from the female member (). This device has a lever () articulated to the support () between a rest position, wherein the lever () is separated from the female member (), to a position of collaboration that allows the female member () to be driven toward a position to allow the male member (E) to be released. The lever () includes structure () for guiding the male member (E) in such a way as to encourage guidance of the male member (E) to mate with the female member () when the lever () is in the rest position.

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La Turballe, France

Francois Gaffe