Coasting or Braking?

[Tideland Prius]

Turn off the radio and lower the fan speed. Press the brake pedal lightly and you'll hear a whine from the motors. Press harder and that sound will disappear. I use that to gauge how hard to press. Of course, you can only hear it with the radio off cause it's quite soft and even someone talking will drown out the sound.

[snarf44]

Coastaletech seems to be working on a mod that visually shows the relative amount of friction braking being applied. Cool idea.

http://www.coastaletech.com/new_page_1.htm

[DaveinOlyWA]

it would be nice if someone came up with a scanner tool like the one Frank has for his classic. it shows how much power is been regen. you could use that for to find the most efficient braking techniques since that is what this post is really about.

[alsgameroom]

[quote]Coastaletech seems to be working on a mod that visually shows the relative amount of friction braking being applied. Cool idea.

So this mod isn't available yet Huh??

[alsgameroom]

I got off my lazy duff ops: and went to the costal site and the friction breaking / ICE on visual display MOD is not available yet.

Gotta Question regarding breaking and regeneration.

First of all I got my battery to go GREEN twice on my way into work by paying more attention to my breaking pressure, even heard the motors whirring at one ponit! I was just applying slight pressure and holding the break pedal there.

heres the Question -

Does regeneration stay engaged if one activates it with the break pedal then lets off the break pedal until you either depress the gas pedal or engage friction brakes?

Lovin' my Prius (almost 700 miles on her now )

thanks.. AL

[gordonr]

Don't know if this info is accurate, but...

When we took delivery of our Prius a couple of weeks ago, the hybrid sales expert at the dealership told us to coast rather than brake if possible. He said that coasting gives you about 2x the regeneration vs. braking.

[efusco]

<div class='quotetop'>QUOTE(gordonr\";p=\"110699)</div>

Don't know if this info is accurate, but...

When we took delivery of our Prius a couple of weeks ago, the hybrid sales expert at the dealership told us to coast rather than brake if possible.  He said that coasting gives you about 2x the regeneration vs. braking.
[/b]

That is most definately NOT accurate. Multiple people have measured the regeneration both with the THHT and personal electronic measuring equipment and shown that moderate braking is most efficient at regenerating.

[efusco]

<div class='quotetop'>QUOTE(alsgameroom\";p=\"110682)</div>

Does regeneration stay engaged if one activates it with the break pedal then lets off the break pedal until you either depress the gas pedal or engage friction brakes?[/b]

Al,
I'm not sure I understand your question. Are you asking if the same level of regenerative braking is maintained after you take your foot off the brake pedal? Of course not. If you are not applying any brake or accelerator pressure you'll get the nominal regenerative braking that occurs when you cost, so some regeneration continues, but not at the level you were at with your foot depressing the brake.

[alsgameroom]

Evan -

Yes you answered my question.. thats what I suspected but wasn't sure.

thanks!

[efusco]

<div class='quotetop'>QUOTE(SDiego\";p=\"110263)</div>

So even just slightly pushing on the brake pedal, you could still be dragging your brakes? I try and just push just enough to feel a resistance and thats all. Maybe just slightly more at times.  I quess the only way to test it, is try it and at the bottom of the hill, pull over and check the temperature of the front rotors and see how warm or hot they are.[/b]

No, slight pressure...even moderate pressure on the brakes, if applied gradually, will not engage the friction brakes (on the 2G Prius) at all.

There are sensors that detect the speed and amount of pressure applied, so sudden braking, even if not braking that hard, will engage the friction brakes...and you can feel it.