Evaluation of the 2010 Toyota Prius Hybrid Synergy Drive System Page: 47 of 88
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planetary gear is connected directly to the motor output in the 2004 Prius, and to the motor through a
high-speed reduction gear in the 2010 Prius and 2007 Camry. The 2010 Prius, 2004 Prius, and Camry
planetary ring gears drive the differential output through a series of drive gears.- L
Coolat Motr for Differential Gear To
t an t #1 ICE Input Pu
ports~ PakngBek upt41Phoid Differential Gear
mp Output #2Fig. 2.52.2010 Prius ECVT.
2004 Prius
Mi S
CE C z
R MC2
S: Sun
C: Carrier
R: RingCamry/2010 Prius
MG1 S
ICE C IvG2 s
R R
CGS450h / LS600h
ICE C hG
R C C iase
RFig. 2.53. Mechanical diagram of 2010 Prius, 2004 Prius, Camry, and LS 600h gear systems.
2.3.1 ECVT Disassembly
An overview of the ECVT sections is shown in Fig. 2.54. Shown in Fig. 2.55 is the section which mounts
to the ICE. The generator is located between the bell housing (where the ICE attaches) and the gear
section, with the light gray generator stator slightly visible through a small opening in the housing. The
power-split planetary carrier with four small gears is visible, as the planetary ring gear has been removed.
The differential gear and drive gear is also visible in this figure. The same view of the ECVT is shown in
Fig. 2.56, yet with the planetary ring gear installed, as well as the speed reduction planetary carrier and
sun gear. The carrier of the speed reduction planetary gear is fixed to the chassis with fingers which fit
into groves shown in Fig. 2.57. In this figure, the motor section is shown with the speed-reduction
planetary sun gear attached to the motor output shaft. Part of the parking brake mechanism is noticeable
in the lower-right portion of this image, and the remainder of the mechanism extends to eventually engage
with large notches located on the ring-gear unit. The brake is activated through a cycloidal gear which is
driven by a 12-8 switched reluctance motor with a black housing (visible in Fig. 2.54).38
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Burress, Timothy A; Campbell, Steven L; Coomer, Chester; Ayers, Curtis William; Wereszczak, Andrew A.; Cunningham, Joseph P. (Joseph Philip) et al. Evaluation of the 2010 Toyota Prius Hybrid Synergy Drive System, report, March 1, 2011; United States. (https://digital.library.unt.edu/ark:/67531/metadc836432/m1/47/: accessed May 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.