公开(公告)号：US3613484A

公开(公告)日：1971-10-19

申请号：US3613484D

申请日：1969-12-08

Applicant: FORD MOTOR CO

Inventor： PIERCE STANLEY L ,  WINN WILLIAM C

IPC: F16H41/00 ,  F16H61/06 ,  B60K21/10

CPC classification number: F16H61/065 ,  Y10T477/693746 ,  Y10T477/693754 ,  Y10T477/6938 ,  Y10T477/69383

Abstract: A CONTROL VALVE SYSTEM FOR CONTROLLING RATIO SHIFTS IN A MULTIPLE RATIO POWER TRANSMISSION MECHANISM IN AN AUTOMOTIVE VEHICLE DRIVELINE HAVING FLUID PRESSURE OPERATED CLUTCH AND BRAKE SERVOS FOR CONTROLLING RATIO SHIFTS, SAID SYSTEM COMPRISING A VALVE ASSEMBLY FOR CONTROLLING THE RATE OF ENGAGEMENT OF ONE SERVO DURING A RATIO CHANGE FROM THE LOWEST SPEED RATIO TO AN INTERMEDIATE SPEED RATIO AND FOR CONTROLLING THE CLUTCH AND BRAKE ENGAGEMENT AND RELEASE PATTTERN WHEN A DOWN SHIFT FROM THE HIGH SPEED RATION TO AN INTERMEDIATE SPEED RATIO OCCURS IN RESPONSE TO INCREASED TORQUE DEMAND AT LOW VEHICLE SPEEDS, AND A SEPARATE VALVE ASSEMBLY FOR CONTROLLING CORRESPONDING TORQUE DEMAND DOWNSHIFT WHEN THE VECHICLE IS OPERATED IN A RELATIVE HIGH SPEED RANGE.