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:
Jun. 15, 1999
Filed:
Jan. 08, 1998
Marc Andres, Schiltingheim, FR;
Roland Mathis, Ribeauville, FR;
Delphi France Automotive Systems, La Garenne-Colombes, FR;
Abstract
An automatic transmission (10) comprising a housing (12); a planetary gear train (14) mounted within the housing; an input drive shaft (16) connectable to main drive means (38) to provide input drive to the planetary gear train; an output drive shaft (18) from the planetary gear train; and an auxiliary drive means (E) for providing a variable auxiliary drive input (34) to the planetary gear train; wherein the planetary gear train includes a first planetary gear set (40) and a second planetary gear set (42); the first planetary gear set including a sun gear (44) having a drive input (26) connectable to the input drive shaft and a reaction input (28) connectable to the housing, a pinion gear (46) interengaging with the sun gear, and a pinion carrier (48) on which the pinion gear is rotatably mounted, the pinion carrier having a drive input (24) connectable to the input drive shaft and a reaction input (30,32) connectable to the housing, and being connected with the auxiliary drive input; the second planetary gear set including a sun gear (50) having a drive input (22) connectable with the input drive shaft; and wherein the output drive shaft is driven by a ring gear (54) of the first planetary gear set or the second planetary gear set. Provides an automatic transmission with first and second constant forward gear ratios with a continuously variable gear ratio therebetween.