CONTROL DEVICE OF POWER TRANSMISSION DEVICE FOR VEHICLE

• Main Authors: TSUJITA MASAYUKI, AMANO JUN, SUZUMURA KYOHEI, FUKAO MITSUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2019
• 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 provide a control device of a power transmission device for a vehicle which can suppress the generation of a gear change shock when switching a gear mode to a stepless gear change mode from a second backward gear mode.SOLUTION: In a control device of a power transmission device for a vehicle having a gear mode and a stepless gear change mode, the gear mode has a first backward gear mode in which a second valve is opened, and which is formed by the communication of a second solenoid and a first engagement element, and a second backward gear mode in which a first valve is opened by hydraulic pressure outputted from a first solenoid, and which is formed by the communication of the first engagement element and first hydraulic pressure supply means. When the second solenoid is failed during the first backward gear mode, the second backward gear mode is formed, and when a gear change ratio of a continuously variable transmission is lower than a prescribed value in the second backward gear mode, changeover to the stepless gear change mode is prohibited.SELECTED DRAWING: Figure 3 【課題】第２後進ギヤモードから無段変速モードに切り替えたときに、変速ショックが生じるのを抑制できる車両用動力伝達装置の制御装置を提供すること。【解決手段】ギヤモードと無段変速モードとを有する車両用動力伝達装置の制御装置であって、ギヤモードは、第２バルブが開弁され、第２ソレノイドと第１係合要素とが連通することによって形成される第１後進ギヤモードと、第１ソレノイドから出力された油圧によって、第１バルブが開弁され、第１係合要素と第１油圧供給手段とを連通することによって形成される第２後進ギヤモードとを有し、第１後進ギヤモード中に記第２ソレノイドが異常となった場合に第２後進ギヤモードを形成し、第２後進ギヤモードにおいて、無段変速機の変速比が所定値未満の場合には、無段変速モードへの切り替えを禁止する。【選択図】図３