[PStechPaul]

I wouldn't worry too much about overdriving the ICE because it's essentially the same as compression braking down a steep downhill. In that case of course you might want to disconnect the ICE and use regeneration. But also maybe disconnect the ICE whenever it's running outside of its most efficient range of operation.

The problem with connecting the motor to the driveshaft is that it will not benefit from torque multiplication through the tranny, so low speed performance will suffer, or you'll need a much larger motor.

[jimberry3]

Ziggy,

My environmental reason for doing this is most important because I deeply believe in alternative energies and in this case all electric is not feasible for the size and weight of vehicle in conjunction with the terrain that will be crossed. So our next step on the list is hybrid, and since they will be in the boonies quite a bit, the KISS principle applies as much as possible hence this configuration.
Fiscally, this is the least expensive of the options. Money spent thus far, doing everything in our shop minus the ICE rebuild is 21k rounded up not including labor (this is also pricing in the free components our sponsors are providing) and we estimate another 15k.
Our other intentions for this is just to compliment the electric motorcycle side of the equation. And last but certainly not least our quest to do this correctly is driven by the fact that once we are done with the trip, we bring everything up to par and the vehicle is raffled off with the proceeds going to help feed hungry children.

So please help with positive input.

[frodus]

It was asked before....

What motor?
What existing controller?

[Ziggythewiz]

Along with the KISS principle, I don't think you need any special controller. The simplest approach would probably be to use a microcontroller to read the throttle input and the RPMs from the ECU and determine the appropriate output to request from the motor controller.

Have you watched much EVTV? Jack's had lots of fun playing with ECUs and lookup tables.

[jimberry3]

Paul, I do need to worry about overdriving the ICE as it will go into a compression braking type of mode and the computer will try and fight it sending the injectors and timing into overdrive trying to fight that therefore making it read false parameters

[jimberry3]

Frodus, yes, it was asked before and I am still working on receiving manufacturing quotes, I have it narrowed down, but nothing that I can quote you a standard part number for as it will most likely be a custom motor due to heavier bearings etc. As to the controller it can be one of any AC controllers on the market. I apologize for not making it clear that existing did not mean one I had in my hands at the moment. I meant one already on the market that I can find that may fit our application and that I may be able to reprogram

[jimberry3]

Thank you for your input gentlemen, I have actually finished my research and tried a reprogramming on an existing controller that I DO have in my possession on a static AC motor with our haltech and have been able to cycle the motor up and down the spectrum. So we are probably just a few days , a few hundred lines of code (thank gosh it is actually not writing the actual code but instead almost plug and play) and a couple hundred miles from having this working properly