ROUTE CHANGEOVER CONTROL DEVICE

• Main Authors: KATO SATOSHI, OWATARI MASAKAZU, TOKURA TAKAAKI, TSUKAMOTO NORIHIRO, MORITOMO SUSUMU
• Format: Patent
• Language: English; Japanese
• Published: 18.07.2019
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To minimize downshift control which cannot control engagement pressure taking into consideration of a rotation number, to secure a drive force at a succeeding start, and to secure startability.SOLUTION: In a route changeover control device, a continuously variable transmission for continuously changing a gear change ratio, and a gear gear-change mechanism for charging the gear change ratio are arranged in parallel with each other, and a stepless gear change mode for transmitting torque from an input shaft to an output shaft via the continuously variable transmission, and a gear mode for transmitting the torque to the output shaft via the gear gear-change mechanism are selectively switchable by a combination of engagement and release of a plurality of advance clutches. When a vehicle speed is not higher than a prescribed vehicle speed during stepless gear change mode traveling, when the gear change ratio of the continuously variable transmission is not lower than a prescribed gear change ratio, and when a rotation number of the output shaft is not smaller than a prescribed rotation number, the control device performs a downshift while determining a progress degree of a gear change of the continuously variable transmission on the basis of the rotation number of the output shaft, and when the rotation number of the output shaft is smaller than the prescribed rotation number, the control device performs the downshift without taking into consideration the progress degree of the gear change based on the rotation number of the output shaft.SELECTED DRAWING: Figure 2 【課題】回転数を考慮した係合圧力の制御を実行できないダウンシフト制御を最小限にするとともに、次に発進する際の駆動力を確保して発進性能を確保すること。【解決手段】変速比を連続的に変更する無段変速機と、変速比を変更するギヤ変速機構とが並列に設けられ、入力軸からのトルクを無段変速機を介して出力軸に伝達する無段変速モードと、ギヤ変速機構を介して出力軸に伝達するギヤモードとを、複数の前進用クラッチの係合および解放の組み合わせによって選択的に切り換え可能に構成された経路切換制御装置であって、無段変速モード走行中に車速が所定車速以下、無段変速機の変速比が所定変速比以上、かつ出力軸回転数が所定回転数以上の場合、出力軸回転数に基づいて無段変速機の変速の進行度を判断しつつダウンシフトを行い、出力軸回転数が所定回転数未満の場合、出力軸回転数に基づく変速の進行度を考慮せずにダウンシフトを行う。【選択図】図２