2 stage regen

[gazz]

I noticed this morning while driving to work that the regen while off throttle seems to have two levels. With your foot off the throttle you get full regen, but if you apply a small amount of throttle the regen is reduced but you still have the blue bars so I assume it is still regening electric. Has anybody else noticed this or am I going mad with light throttle control.

[SomervillePrius]

I don't think it's 2 stages as much as linear. If you push the pedal slowly it will regen less and less until it hits the "sweet spot" with no arrows on the display. This is a close to coasting as you will get and is used in pulse and glide. So assuming your car is warmed up you should be able to hit a "no arrows" state on the display which means your actually coasting.

[qbee42]

<div class='quotetop'>QUOTE(SomervillePrius @ May 21 2007, 08:25 AM) [snapback]446561[/snapback]</div>

I don't think it's 2 stages as much as linear. If you push the pedal slowly it will regen less and less until it hits the "sweet spot" with no arrows on the display. This is a close to coasting as you will get and is used in pulse and glide. So assuming your car is warmed up you should be able to hit a "no arrows" state on the display which means your actually coasting.
[/b]

Correct. The natural state would be to have no regen braking until the brake pedal is depressed, but this would be counter intuitive compared to normal engines and transmissions. The Prius control system applies a small amount of regen to simulate engine drag when you lift your foot from the accelerator.

Tom

[gazz]

<div class='quotetop'>QUOTE(SomervillePrius @ May 21 2007, 07:25 AM) [snapback]446561[/snapback]</div>

I don't think it's 2 stages as much as linear. If you push the pedal slowly it will regen less and less until it hits the "sweet spot" with no arrows on the display. This is a close to coasting as you will get and is used in pulse and glide. So assuming your car is warmed up you should be able to hit a "no arrows" state on the display which means your actually coasting.
[/b]

Thanks for that, it's just that the throttle movment is so small I can only detect 2 levels. But its interesting to know anyway, sometimes if I need to loses a bit of speed and find this light regen quite useful.

[john1701a]

You'll get a small variance between throttle and no throttle. But that's no where near the difference you get with the 2 stages that actually are available...

Electricity generated while you are driving comes from the 10kW motor.

Electricity generated while you are braking comes from the 50kW motor.

[ken1784]

<div class='quotetop'>QUOTE(gazz @ May 21 2007, 08:58 PM) [snapback]446553[/snapback]</div>

if you apply a small amount of throttle the regen is reduced but you still have the blue bars
[/b]

I don't understand what you're saying about "blue bars".
The "blue bars" are just showing a battery SOC level, 4 to 6 bars, not related to regen.
A "green arrow" shows the regen.

Anyway...
We observe the regen is not such step stages like digital, but we see it analog.

We watch CAN ID 0x244 7th byte shows the accel pedal value (0 to 200) and CAN ID 0x03B 1st and 2nd byte shows charge/discharge amp value to/from HV battery...

pedal value 0 to 2: there is regen simulating a conventional vehicle's throttle off. The regen amp value is propotional to the pedal value.
pedal value 3: deadband coasting, same ampere usage as in N.
pedal value 4 to 19(?): MFD shows no green or yellow arrow and it looks deadband, but we see some amp use, a light EV mode.

The accel pedal position is very sensitive on these situation and you need some kind of CAN message decorder.

Ken@Japan

[gazz]

<div class='quotetop'>QUOTE(ken1784 @ May 21 2007, 12:24 PM) [snapback]446750[/snapback]</div>

I don't understand what you're saying about "blue bars".
The "blue bars" are just showing a battery SOC level, 4 to 6 bars, not related to regen.
A "green arrow" shows the regen.
Ken@Japan
[/b]

I mean the blue arrows, there is a definatley a difference between full throttle off and a slight pressure which keeps the blue arrows on, the regen amount feels different. Any more throttle goes in to a glide, no arrows.

Can some one also explain the different stages of warm up, I keep coming accros them but I have not found a topic which explains them.

Also I am getting very excited as it looks as I might get my first 600mile tank, I am on 540 mile with two bars left, fingers crossed, that should make 66 UK mpg for the tank.

[gazz]

Can some one also explain the different stages of warm up, I keep coming accros them but I have not found a topic which explains them.

Also I am getting very excited as it looks as I might get my first 600mile tank, I am on 540 mile with two bars left, fingers crossed, that should make 66 UK mpg for the tank.

[KV55]

<div class='quotetop'>QUOTE(gazz @ May 22 2007, 11:37 AM) [snapback]447219[/snapback]</div>

Can some one also explain the different stages of warm up, I keep coming accros them but I have not found a topic which explains them.

Also I am getting very excited as it looks as I might get my first 600mile tank, I am on 540 mile with two bars left, fingers crossed, that should make 66 UK mpg for the tank.
[/b]

Hobbit has a page describing the stages,

http://www.techno-fandom.org/~hobbit...ive-stages.txt

best read just before you set off then you can spot the transition between stages as they happen. They only affect your journey if you have stop-start traffic during the warm up. You want to avoid making a stop when the engine won't shut down. Good luck with the 600 miles, I find I can go about 20 miles between reaching the final bar and getting the add fuel ping, then it is up to you. Set the second trip counter when you get the ping and aim for a reliable petrol station.

[gazz]

<div class='quotetop'>QUOTE(KV55 @ May 22 2007, 07:51 AM) [snapback]447242[/snapback]</div>

Hobbit has a page describing the stages,

http://www.techno-fandom.org/~hobbit...ive-stages.txt

best read just before you set off then you can spot the transition between stages as they happen. They only affect your journey if you have stop-start traffic during the warm up. You want to avoid making a stop when the engine won't shut down. Good luck with the 600 miles, I find I can go about 20 miles between reaching the final bar and getting the add fuel ping, then it is up to you. Set the second trip counter when you get the ping and aim for a reliable petrol station.
[/b]

Thanks, I search and search but still cannot finf half the stuff on this site.