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Discussion Starter · #1 ·
Hi, all sure this has already been discussed but need to ask. What is the formula for working out how many miles to the kw. Yesterday I did my first long journey. I traveled 85 miles on a full battery. On reaching my destination I had used 76% of the battery. Probably half motorway & half country roads. So not sure if that is good or bad. Did drive carefully using paddles & on motorway driving on average 68mph. Had a few other issues but will save them for later.
 

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A simple way is the car has a 35.5 kw battery. You used 76,% ,which equates to 26.98 kw used. Divide that by 85 (miles) equates to .317kw roughly per mile. That equals 3.15 miles per kw.

Rough I know and I am sure cleverer people than me can add a greater degree of knowledge.

Another example of my very basic thinking

Start from % of battery available

Let's say 90% going down to 30% over 70 miles

Dividing 35.5 by 100 is .355 so multiply by % available
(1% is always .355kw on a new battery but this may degrade over time making it more difficult) so 90% = 31.95kw

30% - Multiply .355 X 30 = 10.65kw

Subtract 10.65 from 31.95 = 21.3kw then divide by 70 (miles) = .304kw per mile.

1kw divided by .304kw = 3.28 miles per kw

P..s if usable battery is only 30.5kw the base 1% is .305kw

Hope that is correct..it's helped me at least...I think!
 

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Discussion Starter · #3 ·
Thanks for that. Not sure if that is good, bad or a decent average for the type of journey I did. 50:50 motorway, country roads. I had other issues, on the M1 between Chesterfield & Nottingham which is a fair way maybe 15 - 20 miles the Speedo & hud we’re displaying that length as 30 mph. Although speed was 70 mph. I know this is not a lot to talk about but it was really annoying could this be a software issue. Also the lane assist is really powerful so obviously during lane changes the steering was quite should I say wobbly. Anyway decided to turn it off as it was a bit dangerous, however moving lanes to the right was ok but moving back to the left the wheel was wobbly, anybody had this experienc?
 

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Can you confirm what you mean by HUD at 30mph. Speed sign detector picks up mph road signs and puts that on hud. If the last visible sign was 30mph It would stay on the hud until another sign was detected. Is that what you are talking about?

Had the same lane assist issue on my cx5. It was over sensitive but you could turn it down. It was worse at higher speeds. There seems to be no adjustment on the mx30. On or off. I don't find it that bad on the mx30 to be honest. Have you had lane assist before?

I wonder if the forward sensing camera is/was working ok because that could affect both...
 

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Lane assist is a great feature, it was a bit weird the first time it kicked in for me. If you use the indicators and there is nobody directly alongside you it will let you change smoothly - even the 3 blink half dip of the indicator stalk will stop the car pulling back to the middle of the lane
 

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Discussion Starter · #6 ·
Hi Thebriggie, yeh the head up displayed the 30mph whilst on the motorway of 70mph & the Speedo showed the red line from the 30 to my 70 mph speed. Not a problem but really annoying. The speed limit was 70mph, just in case others think there was a speed restriction on the motorway. Yea lane assist was practically taking the wheel out of my hands. Yes had lane keeping assist on my last two cars. This one really took me by surprise, not sure if there could be a fault. Surely if I switch it off it should cease lane keeping assist.
 

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Hi Thebriggie, yeh the head up displayed the 30mph whilst on the motorway of 70mph & the Speedo showed the red line from the 30 to my 70 mph speed. Not a problem but really annoying. The speed limit was 70mph, just in case others think there was a speed restriction on the motorway. Yea lane assist was practically taking the wheel out of my hands. Yes had lane keeping assist on my last two cars. This one really took me by surprise, not sure if there could be a fault. Surely if I switch it off it should cease lane keeping assist.


Did any other lights appear on the dash as you turned left? I think ELK is also on the car and cannot be turned off The ELK is a system designed to assist
the driver’s steering wheel operation to
avoid danger.
The ELK consists of the Blind Spot
Assist function to prevent your vehicle
from colliding with vehicles on
adjacent lanes, and the Road Keep
Assist function to prevent your vehicle
from deviating from the road.
 

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Discussion Starter · #8 ·
No after performing an overtake I was moving back into the near side lane. The near side mirror cleared me to move. So are people thinking there is a problem?
 

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Re seasidebaz if you have indicated and yet it still happened and if no one else offers a solution soon and you still have genuine safety concerns then get it looked at. Better safe than sorry. I know its an inconvenience but its a small price to pay.

My experience tells me that you need to be able to recreate it so you can demonstrate it to the dealership to get them to genuinely accept there is an issue. My experience of dealerships is they will take it for a little drive and say no problem here! (As happened with my cx5) Is there a stretch of road near the dealership that you can replicate the problem on/during a test drive and let them drive it!

Alan
 

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Discussion Starter · #11 ·
No because when moving to near side lane ( lane 1 ) no need to indicate.
Thebriggie yes I will try it first again. I will also do as seasidebaz has said & try indicating but I was taught way back no need when moving from lane 2 to lane 1 but won’t split hairs I’ll see what happens. Anyone experience wrong speed sign recognition. I have noticed this locally in 30 mile speed limit & it comes up 20 speed limit & I know it’s a 30 no restrictions. I know to some this sounds petty but I am wondering if it’s a software problem.
 

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I think the car wants assurance that you are actively trying to move that way to avoid driving off the road (as it doesn't know what lane you are in) - like i said a little flick on the indicator stick is enough usually.

I found the recognition can sometimes miss signs when moving from 20 to 30 and the other way and can quite often pick up signs from side roads instead if they are too close or at the wrong angle to the main carriageway, any particular junction you had an issue with on the M1? Very familiar with that stretch of road
 

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Also, just to add to this - do you wear glasses? I think the in-cabin attention sensor can't read eyes properly behind glasses so I've had it hard brake when someone pulls in front of me
 

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If its anything its a hardware issue. Software issues tend to to be more conspicuous across end users. Ensure the area around the fsc on the car windscreen is clear and not dirty. Seasidebaz is correct re indicators etc. as the elk system might think you are driving off the road. The hud speed limit displays can irritate you very occasionally but in the main they do a good job...also you can look up and see actual signs 😉 I do worry that in the future we become too dependent on the tech and forget some of our driving basics.

Good luck and let us know how you get on!

Alan
 

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No because when moving to near side lane ( lane 1 ) no need to indicate.
It does not matter if there is no need to indicate.

If the lane assist sensors detected the lanes, you need to first to indicate before crossing the lane, otherwise the wheel will first gently vibrates posing some resistance and if you keep pushing, the car will try to put you back in the lane.

Depending on the models, some cars feature an advanced lane assist which will keep you in the middle of a lane all the time, with the only requirement to keep your hands on the wheel.
 

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Paul, when I was out and about today I did not indicate when moving lanes to replicate your problem As both electric monkey and seasidebaz have stated that is the root cause of your problem for sure. The car expects you give tell it what you are doing hence the resistance to move lane.

Alan
 

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Hi, all sure this has already been discussed but need to ask. What is the formula for working out how many miles to the kw. Yesterday I did my first long journey. I traveled 85 miles on a full battery. On reaching my destination I had used 76% of the battery. Probably half motorway & half country roads. So not sure if that is good or bad. Did drive carefully using paddles & on motorway driving on average 68mph. Had a few other issues but will save them for later.
Hi I do 31 miles half m54 then city at around 55mph I use roughly 1/4 of power and average around 4.0 mi/kwh lights on heating on so in the summer I hope I will do better
 

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Hi, all sure this has already been discussed but need to ask. What is the formula for working out how many miles to the kw. Yesterday I did my first long journey. I traveled 85 miles on a full battery. On reaching my destination I had used 76% of the battery. Probably half motorway & half country roads. So not sure if that is good or bad. Did drive carefully using paddles & on motorway driving on average 68mph. Had a few other issues but will save them for later.
Problem is we dont know exactly how much of the battery is available to use.
There is a buffer below 0% so "real" 100% is probably, we just dont know, more like 109% including the buffer.
85 miles/0,76=112 miles
Plus buffer below 0% 112x1,09=122 miles
Useable battery 30,5??? kWh
122 miles/30.5=4 miles per kWh
What consumption did the car state?
Hope this makes sense. Again two unknown variables here:

1 net capacity of the battery and
2 range below 0% State of Charge
So in conclusion we just cannot know exactly. You can measure how much energy you put into the battery at some chargers but then we dont know exactly how big the charging losses are. Confused?
 
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