I had started a discussion over in the Camry section about how to add more battery capacity, and how you surmount the obsticles in the way.
See:
http://www.greenhybrid.com/discuss/s...ad.php?t=11885
As a result of some of that discussion I PM'd one of our local technical experts Bob Wilson to get his take on it, and he sugessted first starting with some instrumentation to learn more about the operation of the car.
At his prompting, I am reposting some of his PM to me so we can start a discussion in the public to get more information out to a wider audience.
Quote from PM:
Quote:
Originally Posted by
ag4ever
Quote:
Originally Posted by bwilson4web
I understand in the Prius plug-in community, they have to 'hack' a battery controller interface so the additional capacity can be used. When the battery state of charge (SOC) apparently determines the charge/discharge characteristics. Trying to dump the power on the bus between transaxle and battery pack assembly doesn't work either because the controllers detect the mismatched current and throws an error code. It is a hard problem.
That is what I was thinking, but I was not sure of that. I was kinda hoping they were just hacking the programing and reconfiguring it like the "power programers" do for gas and diesel engines.
Quote:
Originally Posted by bwilson4web
Let me suggest starting with instrumentation, to understand what is going on. Then look at modifications.
So where should I start with instrumentation? I guess the very basic would be to get a scan gauge, but I am sure that would only provide me with basic data, and I am sure I would be more interested in more detailed data that could be collected by a computer to be analized latter.
Let's take this to a public forum since others would be interested too.
Bob Wilson
So what is everybody doing for data collection on the TSD or HSD systems?
What data are you collecting?
As a basic start I want to know how much fuel is being burned, how much energy is being taken from or given to the battery, and how those data sets correlate to speed, rate of acceleration/decelleration, state of charge, engine speed, MG1 and MG2 speed. All data should be logged against a common time stamp.