eCVT or power-split transmission
Lead Lap
Joined: Nov 2013
Posts: 4,320
Likes: 1,233
From: IL
Toyota first launched the Hybrid Prius with the Synergy Drive CVT in 1997.
Each subsequent model of Hybrid has enlarged and improved on that device.
While the ESh was introduced in 2013 as mentioned, it was using the same
basic configuration of CVT as the Toyota Camry Hybrid that came out in 2007.
When the ES model was revised in 2019 it introduced the newest version of the
hybrid powertrain and the EPA ratings went up from 40 MPG combined to 44 MPG.
That and greater power and weight!
Each subsequent model of Hybrid has enlarged and improved on that device.
While the ESh was introduced in 2013 as mentioned, it was using the same
basic configuration of CVT as the Toyota Camry Hybrid that came out in 2007.
When the ES model was revised in 2019 it introduced the newest version of the
hybrid powertrain and the EPA ratings went up from 40 MPG combined to 44 MPG.
That and greater power and weight!
Lead Lap
Joined: Nov 2013
Posts: 4,320
Likes: 1,233
From: IL
Changes to the Hybrid CVT system for 2019 ESh
There was a major change to the transmission/Hybrid system for the 2019 ES 300h.
The previous generation had the Motor Generators 1 and 2 mounted coaxially, same shaft.
The new 610/710 generation has MG1 and MG2 on separate shafts.
See the TIS drawings to see inside the newer design to see the separate shaft design.
The other page is a Wikipedia page on the changes, TIS does not have internal drawings
of the earlier type.
The previous generation had the Motor Generators 1 and 2 mounted coaxially, same shaft.
The new 610/710 generation has MG1 and MG2 on separate shafts.
See the TIS drawings to see inside the newer design to see the separate shaft design.
The other page is a Wikipedia page on the changes, TIS does not have internal drawings
of the earlier type.
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Instructor
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From: Massachusetts
The way I see it the transmission has been redesigned to make it shorter. It is still the same MG1+MG2 configuration. I do not see anything there that would add efficiency comparable to switch to DI.
Lexus Test Driver
Joined: Jun 2014
Posts: 5,025
Likes: 1,630
From: MI
First of all, it is the ICE which is one of the most efficient gasoline engines ever (A25A-FXS). And then you have the redesigned inverter which means better EV efficiency.
The P810 is also more efficient than the last one. So all in all, you get more power, a heavier car and less fuel consumption.
The P810 is also more efficient than the last one. So all in all, you get more power, a heavier car and less fuel consumption.
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leg3ndary
IS - 3rd Gen (2014-present)
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Oct 18, 2017 12:41 PM