Patent ID: 6342026
Filing Date: 2002-01-29
Classification: F16H

Abstract:
An automatic transmission comprising:an input shaft; an output shaft; a double pinion planetary gear in a first line, and including a sun gear, a ring gear, and a carrier, one of the sun gear and the carrier being connected to the input shaft; a single planetary gear in a second line and including a ring gear connectable to the ring gear of the double pinion planetary gear in the first line; a planetary gear unit provided in series and including: a single planetary gear in a third line, and including a carrier, a sun gear, and a ring gear connected to the ring gear of the double pinion planetary gear in the first line, a single planetary gear in a fourth line and including a carrier, a ring gear connected to the carrier of the single planetary gear in the third line, and a sun gear connected to the sun gear of the single planetary gear in the third line, a first shaft element connected to the ring gear of the single planetary gear in the third line, a second shaft element connected to the carrier of the single planetary gear in the third line, a third shaft element connected to the carrier of the single planetary gear in the fourth line and also connected to the output shaft, and a fourth shaft element connected to the sun gear of the single planetary gear in the third line; a first clutch element for selectively interconnecting the input shaft and the fourth shaft element; a second clutch element for selectively interconnecting the input shaft and the carrier of the single planetary gear in the second line; a first brake element for selectively fixing the first shaft element; a second brake element for selectively fixing the second shaft element; and a third brake element for selectively fixing one of the sun gear and the carrier of the double pinion planetary gear in the first line.