continued from part 2 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.1809/KOL/2008 A
(19) INDIA
(22) Date of filing of Application :23/10/2008 (43) Publication Date : 05/06/2009
(54) Title of the invention : ELECTRICALLY VARIABLE TRANSMISSION WITH COMPOUNDED OUTPUT GEARING
(51) International classification :F16H47/08
(31) Priority Document No :60/984,203
(32) Priority Date :31/10/2007
(71)Name of Applicant :
1)GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Address of Applicant :300 GM RENAISSANCE CENTER,
DETROIT, MICHIGAN U.S.A.
(72)Name of Inventor :
1)BRENDAN M. CONLON
2)KLAUS KERSTING
3)ANDREW W. PHILLIPS
(33) Name of priority country :U.S.A.
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(57) Abstract :
An electrically-variable transmission is provided with first and second motor/generators and three planetary gear assemblies. At least
one of the planetary gear assemblies is a planetary gear assembly having multiple planetary gear sets. As a result, the gears for the
planetary gear assembly can be represented on multiple radial planes. Each of the planetary gear assemblies has continuous
interconnections, and selective connections via a plurality of torque-transmitting mechanisms, that provide three forward electricallyvariable
modes. Preferably, the planetary gear assemblies are connected to one another in such a manner as to allow shifting between
one of the electrically-variable modes to occur at a point offset from a mechanical power flow of the transmission. This decreases the
maximum power output required from the motor/generators.
No. of Pages : 59 No. of Claims : 22
The Patent Office Journal 05/06/2009 26343