Hi,
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Originally Posted by nbalthaser
does the prius offer some way to tell when you go into an energy neutral glide? for example, on the hch, the instantaneous assist and regen gauges along with the instantaneous mpg allow you to tell when you are entering and exiting glide-neutral. it makes it pretty easy to manage the process manually.
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The Prius has an energy flow screen but it lacks 'units' and has a lag of a second or so. But you can adjust the throttle to 'no arrows', an energy neutral glide. The other alternative, which is illegal on a down grade, is to put the Prius in neutral. Neither approach is automatic and that is a problem our vehicles share including the HCH.
Some of the other hypermilers use an OBC scan tool to monitor energy flows with engineering units. I admire the sentiment and that is the tool I recommend to those who are serious about Pulse and Glide. But again, this adds one more burden to the driver, to distract them from situational awareness.
IMHO, the glide should be automatic, built into the vehicle.
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Originally Posted by nbalthaser
the hch instantaneous regen gauge is useful for this. you can tell exactly how much braking is being caused by regen. it's also useful for when ima thinks it might try to sneak in a single green regen bar even though you battery charge is 7/8 full (really annoying b/c you take about 10%mpg hit when this happens) you can slightly press on the accelerator to get the single regen bar to go away.
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The Prius "Consumption" display has a 5 minute average and puts up yellow-triangles for regenerative braking energy. Obviously, this is well after the actual braking event occurred but this has led to two, home-brew approaches.
An Aussi driver put an amplifier in his NHW10 so regenerative braking is more aggressive, which defers mechanical braking. Another Prius owner, Hobbit, has a circuit in his NHW20 that illuminates some LEDs when mechanical braking begins. However, my driving does not involve a lot of regenerative braking.
On my communting route, I have often gotten to work or home without even one triangle. When I do get them, it is from an alternate route that involves coasting down a hill. Even though I drive so I don't have to brake often, I would like some indication of the threshold between regen and mechanical braking.
Bob Wilson