CONTROL DEVICE OF POWER TRANSMISSION DEVICE FOR VEHICLE

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 havi...

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Bibliographic Details
Main Authors TSUJITA MASAYUKI, AMANO JUN, SUZUMURA KYOHEI, FUKAO MITSUHIRO
Format Patent
LanguageEnglish
Japanese
Published 04.04.2019
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Summary: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
Bibliography:Application Number: JP20170175661