VEHICLE SHIFT CONTROL METHOD AND VEHICLE SHIFT CONTROL DEVICE

• Main Authors: TOMODA KOKI, OGINO TAKASHI, MORITA HARUKI, MATSUSHITA TAKENORI, HASEGAWA JUN
• Format: Patent
• Language: English; Japanese
• Published: 13.09.2022
• Subjects: BLASTING; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

To prevent loss of torque during gear changing.SOLUTION: A vehicle shift control method comprises the steps of: performing a gear change operation, in gear changing of a first speed changer, including reducing a torque of a first motor and then putting an engagement clutch into a neutral state, synchronizing rotational speed of the first motor with a gear to be gear changed in the neutral state, engaging the engagement clutch with the gear to be gear changed after synchronization, and returning the torque of the first motor after engagement; and performing torque compensation control for causing a second motor to generate a reduced amount compensating torque during gear change from a start of torque reduction to an end of torque return of the first motor. Further, the vehicle shift control method comprises a step of performing reverse torque compensation control of reducing a torque of the second motor before start of the gear change operation and causing the first motor to generate a reduced amount compensating torque, thereby, making the torque of the second motor smaller than the torque of the first motor, and then, starting the gear change operation.SELECTED DRAWING: Figure 5 【課題】変速中のトルク抜けを抑制する。【解決手段】第１変速機の変速時に、第１モータのトルクを低下させてから噛合い式クラッチをニュートラル状態にすること、ニュートラル状態で第１モータの回転速度を変速先のギヤと同期させること、同期したら噛合い式クラッチを変速先のギヤと噛合わせること、噛合ったら第１モータのトルクを復帰させること、を含む変速動作を行い、第１モータのトルク低下開始からトルク復帰終了までの変速期間中は、低下したトルクを第２モータに発生させるトルク補填制御を行う。さらに、変速動作の開始前に第２モータのトルクを低下させ、かつ低下させた分のトルクを第１モータに発生させる反転トルク補填制御を行うことにより、第２モータのトルクを第１モータのトルクより小さい状態にして変速動作を開始する。【選択図】図５