turbo2ltr wrote:Hmm, just saw the other thread on the topic.. seems like you got the hard part out of the way already.
Yes! Luckily the "golden post" HERE
was right around the time I started diving deep into the inverter messages and found GregH (and others) had made a MiM box for the RAV4EV to isolate messages sent from the onboard charger (in preparation for adding quick charging). Good timing!
Glad to see you tried sending your own messages but I'm guessing that at the time you didn't try replicating the CRC and thus your messages were rejected by the inverter. I probably won't go the injecting messages route at any rate.
turbo2ltr wrote:The other thing is you have to know what is doing the limiting... the inverter or the VCM. Maybe you know this already.
Sort of. I've logged a few "stomp on the throttle" from a dead stop and there's an obvious hold back of the torque message as it ramps up for the first two-ish seconds. I've also read in the service manual that the inverter sends torque limitations to the VCM so while I know the VCM is limiting the torque command message, I'm not sure if it's acting on what the inverter is telling it, or if it's deciding on it's own what to do.
I do know that if you come to an almost complete stop (like 2mph) and then punch it, you get quite a kick in the pants. I want that from stopped, too.
Also a lot of this could be applied to regen. I'd like to have B mode, if possible. I watch the available regen message on the CAR CAN bus with the CANary, and in eco with my foot off the throttle there's usually a good amount of regen-ability available. I have to lightly tap the brake to get it, and it would be nice to not have to do that, too.
how does one go about figuring out what to change the torque message to?
Essentially, my MiM box would have to have it's own control system code. I didn't like my control systems class in college, and here we're essentially dealing with a discrete time control system. I'm definitely going to need help on that one...