Converting Prius G3 to all Electric removing ICE

I'm interested to know how this works. You say "weld the planetary gears together to match the gear ratio of M1 and M2". When the ICE does not rev (and probably when it is not present), MG1 has to turn reverse with respect to MG2. How is this accomplished? At what ratio do MG1 and MG2 turn? If it is the same as normal (143:145) then you won't go very fast.

I suppose you will have to add a big battery. Does this battery also work with a normally operating Prius converting it to a plugin)?

 

Besides the Prius PHV, the Toyota Mirai is the closest that I know of: it has the Q410 transaxle, which—at least from the line drawings in New Car Features (more info)—is a single-motor derivative of the P410 from the third-generation Prius.

Oak Ridge National Laboratory did some tests on the third-generation Prius hardware; see Burress, T.A., et al., “Evaluation of the 2010 Toyota Prius Hybrid Synergy Drive System” (PDF), ORNL/TM-2010/253, 2011.

The books I mentioned in the last conversion thread might also be of interest.

I’m not sure which part you mean. The motor generator (MG) ECU in the inverter with converter assembly (power control unit) doesn’t control the gasoline engine; it just runs the power electronics—see N. Maeda, “Construction of Hybrid Vehicle Motor Generator ECU,” SAE Technical Paper 2006-01-1341, for a good block diagram of an older version.

Removing the MG ECU, power management control ECU (HV CPU), or engine control module (ECM)—without a suitably-programmed replacement, or a completely new control system—will prevent the car from operating and turn on several warning lights.

If you’re not using the Toyota control system, all of them, to a first approximation. The floor mats and cupholders are probably OK, but just about everything else will need careful thought.

 

You’d have an easier time converting a mule into a horse.

Trying to change vehicle types is hard. Nobody buys a broken submarine to build a cheaper helicopter.

 

Since the Prius is one big tightly coupled computer network.
You would be better off to find a junked EV that rolled and putting the Prius body on it much like @Bill the Engineer is doing with the Firebrid putting was Firebird body on a Prius v.

Firebrid: The Prius v Powered Hybrid Convertible | PriusChat

 

I think some people just have TOO much time on their hands!

 

Bill is working on the Firebrid to preserve a sentimental car to enjoy during retirement. He is a mechanical engineer that has the skills to make it happen too.

 

Any car can be cheaply converted to a BEV.
(see forkenswift)

but all screens and onboard displays generally become useless save maybe the speedo and odometer .

using the “OEM” parts while slick In concept requires someone to break down can codes and OBDII programming.

that has happened on the leaf which can now be used as a donor car for the motor inverter battery and charger

https://www.google.com/amp/s/www.diyelectriccar.com/forums/showthread.php/vw-golf-prius-motor-invertor-89278.html%3famp=1

I would recommend digging into diyelectriccar as there have been various external inverter control systems made for the various OEMs but due to the Prius being considered underpowered I’m not sure if as much effort has gone there.

 

Let’s consider the specific goal: converting it to EV for less than the cost of replacing the gas engine.

forkenswift cites $998 CAD as of 2009. Adjusted for Canadian inflation that’s $1175 CAD today ($893 USD for reference)

Forkenswift included the cost of the glider car in that total, so if we apply the same here there would be 1175 - 300 = $875 (all CAD) remaining in the budget to repower the car.

It might take some hours hunting for a cheap running engine priced under that figure but it has happened, and can happen again.

There have been plenty of DIYers who successfully did the swap engines even if they didn’t pay that low of a price. The point is that the swap procedure is relatively well known and very well documented where a conversion is not, and every stumbling block is an opportunity to spend money.

 

This little endeavor will certainly not be inexpensive, easy or quick. It's going to be extremely challenging. Should be interesting.

 

watching eagerly, please post plenty of pics and data. all the best!

 

Many ways.
Restore & modernize old computer hardware (SD Cards for storage, for instance)
Smart Home systems using free software such as OpenHAB. Many people "hack" some cheap electronic hardware to suit their purposes.
Build your own computer.

The possibilities are endless and do not involve the possibility of death if things should fail.

 

https://www.google.com/amp/s/www.diyelectriccar.com/forums/showthread.php/any-ac-motor-any-inverter-umc-152234.html%3famp=1

Then start here,
UMC Drive 3.0 Universal Motor Controller – Advantics

the designer is on both diyelectriccar and endless sphere

GEN III is explicitly mentioned

 

It would be a lot easier to just design one from scratch. Patent it.
Then you can sell it or lease all the tech stuff.

 

Actually it would be a lot easier to start with a scraped Prime that already has a one way clutch to use MG1 for acceleration. It also is programmed more for EV driving.

 

Did I mention that I have 6 patents? Didn't earn a thing beyond my normal pay for any of them.

 

or get a battery, charger and wire that UMC thing I linked to into the canbus