Hydraulic friction braking system for electrically propelled vehicle - incorporates pedal with characteristic feel imparted by compression spring in coupling to electromagnet-driven braking piston

• Main Authors: BALZ, JUERGEN., 6200 WIESBADEN, KUNZE, LOTHAR, 6238 HOEIM, KIRCHER, DIETER., 6368 DORTELWEIL, RIETH, PETER E.. DR., 6228 ELTVILLE, HALASY-WIMMER, GEORG, (GRAD.), 6236 ESCHBORN, BILL, KARLHEINZ. DR., 6072 DREIEICH
• Format: Patent
• Language: English; German
• Published: 26.05.1994
• Edition: 5
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

The effect of regenerative braking by the traction motor is augmented by friction brakes applied by hydraulic pressure from a master cylinder (11) under electronic control (70). The actuating rod (6) coupled to the brake pedal is surrounded by a helical simulator spring (8) compressed between the end of its casing and an electromagnet (9) whose armature (13) surrounds the hydraulic piston rod (15). The end of the armature impinges upon an annular flange (16) around the piston rod, causing the piston (54) to slide into the cylinder and expel fluid under pressure into the wheel brake lines. ADVANTAGE - Brake pedal characteristic corresponds to that of standard combustion-engined car with slight hysteresis in interests of comfortable driving.