Automatisches Getriebe für Kraftfahrzeuge

Transmission automatique pour véhicules

Automatic transmission for vehicle

Abstract

An automatic transmission for a vehicle comprises: an input shaft (2) connected to an output shaft of an engine; a first planetary gear unit (10) including a helical sun gear, helical planet pinions supported for rotation on a planet carrier, and a helical ring gear, the sun gear (or the ring gear) being connected to the input shaft (2), the ring gear (or the sun gear) being connected through a one-way clutch to a fixed member such that the same can be restrained from rotation relative to the fixed member, the planet carrier being connected to a first output shaft (15); a first clutch (17) interposed between the input shaft (2) and the first output shaft (15) and capable of being engaged by the action of flyweights operated by centrifugal force and of being disengaged by thrust exerted on the helical gears; a second planetary gear unit (20) including a sun gear, planet pinions supported for rotation on a planet carrier, and a ring gear, the planet carrier being connected to the first output shaft (15), the sun gear (or the ring gear) being connected to a second output shaft (25), the ring gear (or the sun gear) being connected through a one-way clutch (26) to a fixed member such that the same can be restrained from rotation relative to the fixed member; a second clutch (27) interposed between the first and the second output shaft (15, 25), and capable of being controlled by a control means so as to engage the first and the second output shaft (15, 25) or disengage the first and the second output shaft (15, 25) from each other; a third planetary gear unit (30) including a helical sun gear, a helical planet pinions supported for rotation on a planet carrier, and a helical ring gear, the sun gear (or the ring gear) being connected to the second output shaft (25), the ring gear (or the sun gear) being connected through a one-way clutch to a fixed member such that the same can be restrained from rotation relative to the fixed member; and a third clutch (37) interposed between the second and a third output shaft (25, 35), and capable of being engaged by the action of flyweights operated by centrifugal force and of being disengaged by thrust exerted on the helical gears.

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Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    US-5263906-ANovember 23, 1993Antonov Automotive North America B.V.Mechanical automatic transmission directly responsive to torque
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