Device for regulating the pressure between front and rear brake cylinders

Abstract

Abstract A REGULATING DEVICE FOR CONTROLLING THE BRAKE PRESSURE BETWEEN FRONT AND REAR BRAKE CYLINDERS IN RESPONSE TO THE OPERATION OF A BRAKE PEDAL CAUSING THE DISCARGE OF A PRESSURE FLUID FROM A MASTER CYLINDER INCLUDES A SYSTEM IN WHICH THE MASTER CYLINDER IS CONNECTED TO THE CYLINDERS OF THE FRONT WHEELS FOR ACTUATING THEM. THE SYSTEM INCLUDES A REGULATING DEVICE DISPOSED BETWEEN THE FRONT WHEEL FLUID PRESSURE CONNECTION AND THE REAR WHEEL FLUID PRESSURE CONNECTION FOR PROVIDING A PRESSURE BLANCED ACTUATION OF THE REAR WHEEL BRAKE CYLINDERS. THE REGULATING DEVICE INCLUDES A HOUSING HAVING AN INLET FOR THE PRESSURE FLUID SUPPLIED BY THE MASTER CYLINDER AND AN OUTLET SPACED FROM THE INLET FOR DELIVERING THE PRESSURE FLUID TO THE REAR WHEEL BRAKE CYLINDERS. THE HOUSING DEFINES A FIRST INLET CHAMBER WHICH IS CONNECTED TO THE INLET OF THE DEVICE AND A SECOND CHAMBER WHICH IS CONNECTED TO THE DISCHARGE AND TWO VALVE MEMBERS ARE ARRANGED TO MOVE WITHIN THE RESPECTIVE CHAMBERS. THE VALVE MEMBERS ARE CONTRUCTED AND ARRANGED SUCH THAT THE FIRST ONE REGULATES THE FLOW FROM THE FIRST CHAMBER INTO THE SECOND AND THE SECOND ONE REGULATES THE FLOW THROUGH THE OUTLET. THE TWO VALVE MEMBERS AFFECT OPENING AND CLOSING OF THE RESPECTIVE CHAMBERS IN ACCORDANCE WITH THE RELATIONSHIP BETWEEN THE EFFECTIVE CROSS-SECTIONAL AREAS OF THE BOTH VALVE MEMBERS AND THE FORCES OF TWO BIASING SPRINGS. COMMUNICATION BETWEEN THE FIRST AND SECOND FLUID CHAMBERS IS THUS ESTABLISHED INTERMITTENTLY AND CAUSES AN INCREASE OF TH EFLUID PRESSURE DELIVERED TO THE REAR WHEELS AT A RATE SMALLER THAN THAT WHICH IS DELIVERED BY THE MASTER CYLINDER. WHEN THE FLUID PRESSURE OF THE MASTER CYLINDER EXCEEDS A PREDETERMINED VALUE, THE SECOND PISTON CLOSES THE OUTLET OF THE HOUSING BECAUSE OF THE FLUID DIFFERENTIAL PRESSURE BETWEEN THE TWO FLUID CHAMBERS TO MAINTAIN A CONSTANT FLUID CONTROL PRESSURE ON THE REAR WHEEL CONTROL CYLINDERS.

Inventors

• 👤 Hiroshi Kawaguchi

Bibliographic Details