Brake booster with position-dependent pressure equalization

A brake booster is provided having a force input element that is or can be connected to a brake pedal, a chamber arrangement with a working chamber and a vacuum chamber, and a control device with a control valve. The working chamber is selectively connected to the vacuum chamber or to the surroundin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LAREQUI DAVID LOPEZ, GIESE HANS MARTIN
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL BLASTING BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TRANSPORTING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A brake booster is provided having a force input element that is or can be connected to a brake pedal, a chamber arrangement with a working chamber and a vacuum chamber, and a control device with a control valve. The working chamber is selectively connected to the vacuum chamber or to the surrounding atmosphere as a result of a displacement of the force input element. The control valve has a valve element that is selectively prestressed into sealed abutment on a first valve seat provided on the control valve housing or into sealed abutment on a second valve seat provided on the control piston of the control valve by a tension spring. In order to reduce the actuating force, a pneumatic function chamber is selectively isolated from the surrounding atmosphere by the valve element or connected to the vacuum chamber or to the surrounding atmosphere by the force input element.