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MPG to Temp


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29 replies to this topic

#21 OFFLINE   fbov

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Posted 07 August 2015 - 09:37 AM

You have a C-Max Hybrid in Poland? Thought the hybrid was a US-only model... or do you have a US-spec car?

 

I suspect if the ambient temps are very high, the battery may avoid high charge levels, as the combination of high ambient temperature and full charge shortens Li=ion battery life. There are cooling fans for the battery; are they running? Perhaps a driving style that features a lot of short burns and glides, so you only use the available charge? Won't work on long hills....

 

Have fun,

Frank









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#22 OFFLINE   Tomasz Karwowski

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Posted 07 August 2015 - 09:43 AM

Normal driving from home to work - 2miles. At 70F it was 40mpg. How can I erase EV+ settings? It turns on 3 times on this 2 miles (EV+ settings from 4500miles - can it by a problem ?? ). I od not hear any fans. But on self test ODB they works fine. There is no obd trauble codes. 

 

My C-max is from US like my other cars since 2005 :). Cars from US are better :D. 


Edited by Tomasz Karwowski, 07 August 2015 - 09:51 AM.


#23 OFFLINE   ptjones

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Posted 07 August 2015 - 10:20 AM

It is difficult to get good MPG's driving just 2miles, I'd be using Grill Covers and ICE Block heater to improve MPG's. ;)

 

Paul



#24 OFFLINE   Tomasz Karwowski

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Posted 07 August 2015 - 10:26 AM

Last trip - 1100km (683miles) - 44mpg with fully loaded car on the polish roads :) I do not have active grill shutter  -  was broken and i can't buy it in poland :(. 



#25 OFFLINE   ptjones

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Posted 07 August 2015 - 12:43 PM

This is what Grill Covers look like.

C Max Grill Cover Installation Instructions 11 13 Page 3 Of 4
C Max Grill Cover Installation Instructions 11 13 Page 2 Of 4
C Max Grill Cover Installation Instructions 11 13 Page 1 Of 4


#26 OFFLINE   Tomasz Karwowski

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Posted 07 August 2015 - 12:47 PM

And what about temp. of transmission oil??



#27 OFFLINE   ptjones

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Posted 07 August 2015 - 02:32 PM

And what about temp. of transmission oil??

Might be an issue if you were driving for an hour at 70mph on a 90*F day.  I won't worry about it if you were going slow and cooler day and less time.  Otherwise I would remove bottom cover.  Wait a minute, you don't have shutters so you could leave Grill Covers on all the time, never take them off. Cool! :happy feet:  :)

 

Paul


Edited by ptjones, 07 August 2015 - 02:32 PM.


#28 OFFLINE   Tomasz Karwowski

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Posted 09 August 2015 - 03:40 PM

TEST 1 (hot like. :sunny:  :nonono: ..):

Outside temp - 95F in the shadow (in the car on full sun - 150F :swear: )

AC - 71F

Road  - 100miles

Air intake temp (ELM with Forscan) - 122F - 158F

Passanger: 5 + load

kW usage of climate - 2,5/5

MPG - 36.5

 

Test 2 

Outside temp - 68-75F in the shadow

AC - 72F

Road  - 100miles (this same road)

Air intake temp (ELM with Forscan) - Did not check

Passanger:4+ load. 

kW usage of climate - 0,5/5

MPG - 45,2

 

 

Other: 

 

EV+ in hot and short trip - it is crazy - I turned it off. The battery can not to be charge more than 1/2. 


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#29 ONLINE   raadsel

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Posted 09 August 2015 - 07:52 PM

One thing I'm noticing in the heat here (currently around/above 100 daily), my hybrid battery seems to be losing some charge while parked for a day. I've only really noticed it twice because the ICE started when I pressed the start button (SEL), the battery indicator only showed 1/10, or maybe less, of a charge. I can't say for sure but I'm pretty sure, when I had parked, that the battery was sitting above 25% and likely in the 30-40% range.

 

Just wondering if anyone else has observed this in extreme hot or cold or if this may indicate a possible issue with the battery? I will say, other than the low state of charge hurting my fuel economy for the first couple of miles (since it is charging the battery the whole time), it hasn't really seemed to effect my fuel economy.



#30 OFFLINE   hybridbear

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Posted 16 August 2015 - 01:39 PM

Just wondering if anyone else has observed this in extreme hot or cold or if this may indicate a possible issue with the battery? I will say, other than the low state of charge hurting my fuel economy for the first couple of miles (since it is charging the battery the whole time), it hasn't really seemed to effect my fuel economy.

There are a few factors at play here.

  1. The car can only estimate the charge level based on measuring the HVB voltage. When driving the HVB is charged & discharged. This leads to more inaccuracy since the car has to estimate how much charging & discharging happened. When the car is off & the HVB rests the BECM can more accurately estimate the SOC
  2. The HVB temperate may have increased or decreased while parked. Changes in HVB temp result in changes in capacity & thus SOC

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