Proportion of EV miles to ICE miles

[fusionTX]

I reset my lifetime at 3,200 miles, so this information covers 355 miles.

 

[hybridbear]

Interesting. Some of the highway commuters are seeing much lower mileage than others. EV miles doesn't seem to have a very strong correlation to MPGs unless we segregate the results by driving type. I expected that overall we wouldn't see a correlation. What we need to figure out now is who has the closest driving pattern to MXGOLF to try to figure out what's wrong. Nmadole is another with poor mileage but I haven't seen him around here lately

[acdii]

Nick drives short trips, so once he understood that he is OK with the car. He did a longer drive recently and got decent MPG too.

[fusionTX]

Acdii and brcd131 have similar numbers in terms of EV percentage and MPGs.

EV % around .25.

 

Any idea why, Acdii, you EV percentage is so low? did you do mostly highway driving?

[Da0ne]

here is mine

 

[brcd131]

My current theory is that it's the battery. I've spent a lot of time watching the gauges, and what I see is that appears that the electric motor really doesn't help the ICE much when it has the chance. When the battery is discharging, I usually don't see or barely see the EV line come up. Occasionally it will come up some, but that is rare. It also seems that the car spends a disproportionate amount of time charging the battery versus discharging. All of this is at 65 MPH. Almost all of my driving is with the cruise set at 65.

[acdii]

Acdii and brcd131 have similar numbers in terms of EV percentage and MPGs.

EV % around .25.

 

Any idea why, Acdii, you EV percentage is so low? did you do mostly highway driving?

Yep at least 80% at 55 and above. about 4K was the Florida trip, the rest was daily commute on the rural highways. Very little driving below 35 MPH.

[neod192]

My current theory is that it's the battery. I've spent a lot of time watching the gauges, and what I see is that appears that the electric motor really doesn't help the ICE much when it has the chance. When the battery is discharging, I usually don't see or barely see the EV line come up. Occasionally it will come up some, but that is rare. It also seems that the car spends a disproportionate amount of time charging the battery versus discharging. All of this is at 65 MPH. Almost all of my driving is with the cruise set at 65.

When you drive at 65MPH the car requires a lot more energy then if you were to drive at 35 MPH. This causes the battery to get discharged really quick and you don't get that much EV action. When I drive at 35 I can go a lot farther on EV than at 65.

 

Also, if you set your cruise at 65, you'll only go in EV if ACC slows you down to 62-63 (but you already know this :) ).

[aaronj1159]

Yes but the battery will still discharge at those speeds when the electric motor helps out. If there is an issue with the battery and it's taking longer than normal to charge, that would definitely negatively affect highway mileage. I drive 65-68 MPH for probably 80% of my driving and I still get 43 MPG average. My battery is constantly charging/discharging on the highway and (without any scientific reasoning or measurement) it seems to be more or less even between the two.

[jcg1005]

I will check later today but I know when I last looked I was thinking... Hmmm... About 50% EV and 10% Regen. That seems to be in line with everyone else.

[neod192]

I will check later today but I know when I last looked I was thinking... Hmmm... About 50% EV and 10% Regen. That seems to be in line with everyone else.

50% > 36%

[fusionTX]

Yep at least 80% at 55 and above. about 4K was the Florida trip, the rest was daily commute on the rural highways. Very little driving below 35 MPH.

 

I can see the Florida trip having a big impact. That is why i reset my lifetime after my trip. It skews the data big time.

 

On highway trips to work, I still get a significant number of EV miles. These are at minimum 80% highway going 58 to 62 MPH.

Of course, there is the occasional slow down below those speeds when traffic piles up.

 

I wonder if maybe you were not getting your fair share of EV miles.

 

 

 

 

 

[fusionTX]

OK my stats so far at 3000 miles. 1284.4 EV miles and 307.3 Regen miles. Basically 50%.

With 43% EV miles, I would think your average would be much better. Are you not seeing trips in the 40s?

Have you manually computed your tank's MPG to verify that it agrees with the car's computed averages?

[acdii]

It seems the more EV I used the lower the MPG was, at least at 55 MPH. When I was able to get above 60 and stay on ICE with a nearly full pack I was able to touch 40 MPG, otherwise it was around 36. Watching the instant, when cycling between EV and ICE at 55, it rarely went over 30. When the pack was above 60% then I was above 40. Adding the covers helped it some as it stayed warm, but it was keeping it off EV at highway speeds that made the biggest difference.

[corncobs]

I got an interesting result today driving home from the post office in terms of EV vs. regen vs. total miles.

 

As you can see it's 2.1 miles; 1.8 EV & 0.4 regen makes a total of 2.2 miles.

Either it's just a mathematical rounding problem and I think too much of it but its certainly an interesting result.

 

[fusionTX]

I got an interesting result today driving home from the post office in terms of EV vs. regen vs. total miles.

As you can see it's 2.1 miles; 1.8 EV & 0.4 regen makes a total of 2.2 miles.

Either it's just a mathematical rounding problem and I think too much of it but its certainly an interesting result.

I believe regen is already counted in EV. Regen is a subset of the EV miles.

Your display now proves that.

It is misleading the way the miles are displayed. The regen miles should be indented so that it is clearer they are already counted in the EV miles.

Edited May 16, 2013 by fusionTX

[corncobs]

I believe regen is already counted in EV. Regen is a subset of the EV miles.

I believe so too but I think we also had the discussion that it's additional mileage; or at least it was talked about one way or another.

[DeeCee]

Here is my data:

 

EV Miles - 3343.1

Regen Miles - 601.2

Fuel use - 45.0 mpg

Brake Score - 96%

Total miles - 6990.2

[keybman]

EV Miles 2408.8

Regen Miles 281.8

Fuel use 49.5 mpg

Brake Score 93%

Total Miles 4114.3 (reset at 1000 miles)

[hybridbear]

It seems the more EV I used the lower the MPG was, at least at 55 MPH. When I was able to get above 60 and stay on ICE with a nearly full pack I was able to touch 40 MPG, otherwise it was around 36. Watching the instant, when cycling between EV and ICE at 55, it rarely went over 30. When the pack was above 60% then I was above 40. Adding the covers helped it some as it stayed warm, but it was keeping it off EV at highway speeds that made the biggest difference.

This is correct. As I explained in my thread about why hybrids are so efficient using EV on the highway is a poor use of that energy because the gap in efficiency between the electric motor and the ICE is narrowest at high speeds. This means that the charging losses of using the ICE to power a generator and then power an electric motor with that energy requires more energy than just driving with the ICE only.

 

I got an interesting result today driving home from the post office in terms of EV vs. regen vs. total miles.

 

As you can see it's 2.1 miles; 1.8 EV & 0.4 regen makes a total of 2.2 miles.

Either it's just a mathematical rounding problem and I think too much of it but its certainly an interesting result.

Regen miles are not actually a calculation of distance traveled. Regen miles are a representation of the electric energy put back into the battery through braking. Toyota displays this in kWh which is how electric energy is measured, Ford converts this electric energy to miles based on a certain figure of kWh/mile. I wish Ford would show us this info in kWh because that is more useful than some miles calculation that we don't know the math behind.