I pray you get help soon C, you really need it.

 

I know what the ORIGINAL POST is refering to.
I do it sometimes in my 2005 FEH.

I do it because it is a fast way to warm up a cold battery.
I never considered it a good thing for mileage, but mileage wasn't horrible either.

Definately NOTHING like accelerating quickly from a stoplight where you get a brief burst of electric assist, then a taper to nothing as the ICE ramps up to take over all the load.
This is much different.

I will try it and monitor MPG this week.
Like I said, I've done it many times, but always had different gauges (water temp, battery temp, SOC, amps, are my usual 4 up at a time) going other than MPG.

John

 

Thank you. I appreciate the open minded, non insulting reply. Please let me know if you see a difference. I just don't do enough highway driving to know for sure.

 

Let me clarify....

5 times per second is impossible.
4 times per second is impractical to do more than 3 times in a row.
3 times per second is implausible to do longer than a few seconds.

When I tried the above just now, my FEH treated it the same as a constant pedal press.
What works for me ( to quickly warm a battery 20 to 25 degrees in less than 10 minutes) is
50% (ish) pedal for 1 second, release for 1 second, repeat.
This is a more vigorous form of the built-in battery warm-up strategy that takes at least twice as long.

I only went 2 miles just now so no MPG data... yet.

 

I pump the gas as fast as possible, about 50% down. I can maintain a constant highway speed while the needle is into the assist zone. Using battery to maintain highway speed.

If your calf feels the burn, you know it's working.

 

Tried it today on a highway route I use every day.
Past 270 mile average was 29.8 MPG ( pretty good since temps have -8 to 38 ).

Got up to 55 mph on a warm engine, then reset the mpg.
Then did the rapid pedal pump which I found very difficult.
I was able to drain my battery at highway speed on level ground.
Took between 3 and 4 miles.

I found myself accelerating with the added battery boost.
At the end of those ~4 miles I was at 69 to 70 mph.
Turned to the stock mpg meter I had reset, and it showed 29.6 MPG.
It was 38 degrees with light breeze.

HV battery went from 48 to 55 degrees in those 4 minutes.
I could not get constant discharge, there were brief instances of charging, but a net drain down over the 4 minutes.

This is a hard 'experiment' and is not practical.
My take away is you are telling the computer to constantly add assist, but trying not to accelerate by fluttering the pedal. It works, but so what? In 4 miles you have a low battery in need of recharge.
In PHEV conversions of the FEH with larger packs, you intentionally lie to the computer and tell it the SOC is over 53%. Then the car automatically adds battery assist at highway speed to try and use up the 'excess' charge and get back to 'normal' of 53%.
I was able to get 90 mpg on the highway for 25 miles straight with a PHEV I borrowed for a test drive.

John