In October 2006, JATCO sdeveloped and commercialized a new 6-speed automatic transmission (FF6AT) for use on front-wheel-drive vehicles with the aim of improving fuel economy, therefore more environmentally friendly. JATCO developed the FF6AT that is applicable to high-torque engines which CVTs still cannot accomodate. This article describes the basic structure, specifications and features of the FF6AT that has been adopted on vehicles made by Renault S.A., Mitsubishi Motors Corp. and Nissan Motor Co., Ltd. The FF6AT was developed around the following principal concepts: (1) Lower friction (for improving fuel economy), (2) Wider ratio coverage and closer gear ratios (for improving driving performance and drivability), (3) Lighter and more compact (for improving vehicle packaging) and (4) Improved shift performance by using linear solenoids to control clutch and brake pressures directly. The aim was to deliver optimal driving force at all times by selecting the best gear ratio in consideration of drivability and fuel economy.
New 6-speed automatic transmission for front-wheel-drive vehicles
Neues 6-Gang-Automatikgetriebe für Frontantrieb-Fahrzeuge
Review of Automotive Engineering (JSAE) ; 29 , 3 ; 401-404
2008
4 Seiten, 7 Bilder, 2 Tabellen, 1 Quelle
Article (Journal)
English
Anwendung im Fahrzeugbau , Anwendung im Motorenbau , Frontantrieb , Pkw (Personenkraftwagen) , CVT-Getriebe , Automatikgetriebe , Produktinformation , technische Beschreibung , technische Entwicklung , hydraulische Steuerung , Planetenrad , Schaltverhalten (Getriebe) , Fahrverhalten , Kraftstoffverbrauch , Übersetzung (Getriebe)
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