METHOD FOR ADAPTATION OF PRESSURE USED FOR UPSHIFT AND DOWNSHIFT OF T-T MODE IN HYBRID VEHICLE

摘要

PURPOSE: A method for adaption of pressure used for upshift and downshift of T-T mode in hybrid vehicle is provided to improve shifting feeling and to overcome the deviation of a planet gear set and solenoid valve. CONSTITUTION: A method for adaption of pressure used for upshift and downshift of T-Tmode in hybrid vehicles comprises a step of monitoring an engine rate and gradient in a shifting preparation region; a step of comparing current engine rate and engine-decelerating value with a first critical value and second critical value; and a step of correcting the oil pressure of a current coupling when the current engine rate is lower than the first critical value or the engine-decelerating value is over a second critical value. [Reference numerals] (AA) Start; (BB) No; (CC) Yes; (DD) End; (S410) Monitoring engine rate and gradient in a shifting preparation region; (S420) Current engine rate > first critical value or engine decelerating value > second critical value ?; (S430) Correcting the oil pressure of a coupling side according to the maximum reducing amount of the engine rate and the engine rate value at the shifting preparation region