STEP TRANSMISSION

• Main Authors: MORIMOTO TAKASHI, OITA SHINJI, AOKI TOSHIHIKO, KATO HIROSHI, MIYAZAKI TERUBUMI, MORISE MASARU, KATO TAKAYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2015
• 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

PROBLEM TO BE SOLVED: To further improve the fuel economy, drivability, and transmission performance of a vehicle mounting therein a step transmission and improve the durability of engagement elements, and make the step transmission light in weight and compact.SOLUTION: An automatic transmission 20 comprises: a composite planetary gear mechanism 25 configured by a combination of a single-pinion first planetary gear set 21 and a single-pinion third planetary gear set 23; a single-pinion second planetary gear set 22; a single-pinion fourth planetary gear set 24; clutches C1 to C4; and brakes B1 and B2, three out of the clutches C1 to C4 and the brakes B1 and B2 being engaged and the three remainders being disengaged, thereby forming forward first to tenth gears and a reverse gear. 【課題】多段変速機が搭載される車両の燃費、ドライバビリティ、変速性能および係合要素の耐久性をより向上させると共に、多段変速機の軽量コンパクト化を図る。【解決手段】自動変速機２０は、シングルピニオン式の第１遊星歯車２１およびシングルピニオン式の第３遊星歯車２３を組み合わせて構成される複合遊星歯車機構２５と、シングルピニオン式の第２遊星歯車２２と、シングルピニオン式の第４遊星歯車２４と、クラッチＣ１〜Ｃ４と、ブレーキＢ１およびＢ２とを含み、クラッチＣ１〜Ｃ４、ブレーキＢ１およびＢ２のうち、何れか３つを係合させると共に残余の３つを解放させることにより前進第１速段から前進第１０速段および後進段を形成する。【選択図】図１