Prius>45mph

I'm confused by that.. MG2 at 6,500 rpm is 110mph. If you do that with ICE off you're past even the gen3 hybrid limit for MG1 (-10,000). Maybe a screenshot of what you're talking about would help us explain.

Both of the linked simulators stop the slider for MG1, even though the numbers go well beyond the range of the slider, and the tolerance of the real motors, so maybe that's what you're seeing?

The 3 motors are not ever separate. The Power Split Device allows them to run at different speeds, and to change the amount of power going from ICE to the wheels, thereby giving us the CVT-like experience. But the 3 together have a fixed relationship.

If you mean a way in a real Prius to give input to only 1 of the 3 and let the rest keep up with that, it sounds to me like a good way to break your car! Those are pretty carefully computer controlled for speed and fuel economy, and I'd trust their programming over my meddling with such a crucial component

 

In that first screenshot, see how the MG1 dot is red, and the nomograph line (the line connecting all 3 sliders) is red, and slightly bent? If the limit of MG1 is 6500rpm, then you can't do that...

BUT, if the limit is 10k rpm as has been suggested (I thought that was 3rd gen HSD, not our 2nd gen Prii, but I'm no expert so correct me if I'm wrong ) then you should be able to do that... technically... but that's the upper safe limit of rotation still, so the computer will probably always choose to run the ICE over letting MG1 operate in an extreme state.

And yes ICE only goes one direction, as in all cars. Other cars just have a gear mechanism that translates the same forward ICE rotation to reverse wheel speed.

And a note to self: I'm disappointed to see the LED font I used is not showing up in the RPM display for the screenshots you provided... I'll fix that

 

My pleasure making that demo. I'm still working on some fun stuff, similar to john1701a's doc showing different modes of operation. But in my case, I'll put in buttons that allow you to see what's happening during different operating conditions.

I can change the scale of the sliders easily, and I might make a version that allows a choice of engine model if anyone thinks that would be useful. That's getting rather complex though, and I'm already pretty far past my initial goal of making a simple demo that non-technical people would find interesting and informative

I fixed the font problem, so if you reload that page you'll see what I'm talking about.

And I don't think your ICE will ever be allowed to spin backwards, but I'll defer to anyone who actually knows for sure if/why not.

 

FYI...

An interesting chart. Please note that it's for NHW-10, the original Prius in 1997.

Ken@Japan

 

<div class='quotetop'>QUOTE(prius2go @ Sep 3 2006, 08:29 AM) [snapback]313255[/snapback]</div>

There is no interlock mechanism. We need a certain torque to drive the ICE, and nothing drives the ICE at that time.

It is written as "Range 4".
The Range 4 or 5 is almost full throttle and drives the vehicle with a lot of power.
They are nothing to relate with highway coasting.

Ken@Japan

 

If you're talking about *valve* operational ranges 4 and 5 and
wherever else, that's very different. But they *are* relevant to
mileage. See http://techno-fandom.org/~hobbit/cars/sweet/ [which
I've updated a little bit] nearer the end for the charts and some
discussion on why range 4 appears to be sort of magic here.
.
But that still has nothing to do with coasting/warpstealth...
.
_H*

 

<div class='quotetop'>QUOTE(prius2go @ Sep 3 2006, 05:51 PM) [snapback]313435[/snapback]</div>

Use CC if you would like to get the best mileage on highway.
http://priuschat.com/index.php?showtopic=19638&st=8

Ken@Japan