MULTISTAGE TRANSMISSION

• Main Authors: KASUYA SATORU, MORIMOTO TAKASHI, OITA SHINJI, AOKI TOSHIHIKO, KATO HIROSHI, MIYAZAKI TERUBUMI, MORISE MASARU, KATO TAKAYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 05.11.2015
• 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 improve fuel consumption and driveability of a vehicle mounted with a multistage transmission, transmission performance of the multistage transmission and durability of an engaging element of the multistage transmission, and make the multistage transmission lightweight and compact.SOLUTION: An automatic transmission 20 includes single pinion-type first-fourth planetary gears 21-24, clutches C1-C4, and brakes B1 and B2. Any three of the clutches C1-C4 and the brakes B1 and B2 are engaged with one another, and the remaining three of them are released. Thus, forward and backward stages from a first speed stage to an eleventh speed stage are formed. 【課題】多段変速機が搭載される車両の燃費やドライバビリティ，多段変速機の変速性能，多段変速機の係合要素の耐久性を向上させると共に多段変速機を軽量コンパクト化する。【解決手段】自動変速機２０は、シングルピニオン式の第１〜第４遊星歯車２１〜２４とクラッチＣ１〜Ｃ４とブレーキＢ１，Ｂ２とを有し、クラッチＣ１〜Ｃ４およびブレーキＢ１，Ｂ２のうちいずれか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、第１速段から第１１速段までの前進段と後進段とを形成する。【選択図】図１