ELECTRIC BOOSTER

PROBLEM TO BE SOLVED: To improve the operation feeling of a brake pedal by restricting a sudden change of the reaction force to the operation of the brake pedal in an electric booster.SOLUTION: A master pressure control device 3 controls an electric motor 20 based on the amount of movement of an inp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	UENO KENTARO, NOZAWA YUSUKE, KOJIMA ONORI, YAMAGUCHI TOMA, YAMADA YUKIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL BLASTING BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES THERMAL INSULATION 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:	PROBLEM TO BE SOLVED: To improve the operation feeling of a brake pedal by restricting a sudden change of the reaction force to the operation of the brake pedal in an electric booster.SOLUTION: A master pressure control device 3 controls an electric motor 20 based on the amount of movement of an input rod 7, and a primary piston 40 is propelled through a ball and screw mechanism 25 so as to generate the brake hydraulic pressure in a master cylinder 9. The brake hydraulic pressure of the master cylinder 9 is fed back to the brake pedal 100 by an input piston 16 through the input rod 7. When the amount of movement of the input rod 7 achieved a predetermined threshold value, a ratio of the amount of movement of the primary piston 40 to the amount of movement of the input rod 7 is reduced. Fluctuations of the pedal effort when the only input piston 16 moves forward with the pedal effort by a driver after the electric motor 20 achieved a full-load condition and the primary piston 40 stopped is thereby reduced, and the operation feeling of the brake pedal 100 is improved.