The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Oct. 13, 2000
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic transmission for a vehicle comprises: an input shaft ( ) connected to the output shaft of an engine; a first planetary gear unit ( ) including a helical sun gear ( ), helical planet pinions ( ) supported for rotation on a planet carrier ( ), and a helical ring gear ( ); a first clutch ( ) interposed between the input shaft ( ) and the first output shaft ( ) and capable of being engaged by an action of flyweights operated by centrifugal force and of being disengaged by thrust exerted on the helical gears; a second planetary gear unit ( ) including a helical sun gear ( ), helical planet pinions ( ) supported for rotation on a planet carrier ( ), and a helical ring gear ( ); a second clutch ( ) interposed between the first output shaft ( ) and the second output shaft ( ) 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; and a two-speed transmission unit ( ) including a first high-speed gear ( ) for a high-speed transmission system, mounted on the second output shaft ( ), a first low-speed gear ( ) for a low-speed transmission system, mounted on the second output shaft ( ), a second high-speed gear ( ) engaged with the first high-speed gear ( ) and connected through a third clutch ( ) to a third output shaft ( ), and a second low-speed gear ( ) engaged with the first low-speed gear ( ) and connected through a one-way clutch ( ) to the third output shaft ( ). The sun gear ( )(or the ring gear ( )) is connected to the input shaft ( ), the ring gear ( ) (or the sun gear ( )) is 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 ( ) is connected to a first output shaft ( ). The sun gear ( ) (or the ring gear ( )) is connected to the first output shaft ( ), the ring gear ( ) (or the sun gear ( )) is 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 the planet carrier ( ) is connected to a second output shaft ( ). The two-speed transmission unit ( ) serves as the high-speed transmission system when the third clutch ( ) is engaged by the agency of the one-way clutch ( ) or as the low-speed transmission system when the third clutch ( ) is disengaged.