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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Mon Nov 13, 2017 2:27 am 
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It clogs up in snow as well and you cannot fit a bull bar.

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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Tue Sep 11, 2018 7:59 am 
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Joined: Wed Jul 11, 2018 4:35 pm
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Location: Saratoga, CA
Okay, figure this one out. FCM falsed on an overpass with almost NOTHING ahead of the car. Didn't actually apply the brakes, but "BRAKE!" appeared in the display, and the system beeped, as you can hear.

https://www.youtube.com/watch?v=HCxZsamydUA


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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Tue Sep 11, 2018 10:11 am 
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It saw something. Maybe a large insect in front of the sensor?

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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Tue Sep 11, 2018 10:56 pm 
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Second incident in two days. Seems to have trouble with cars hitting the brakes in lanes to the left? Or were the designers too stupid to actually use the info coming from the LDW system to figure out WHERE the lane is? It seems like the car that was hitting the brakes was almost directly in front of me at the time it happened, but that's not the direction I was driving because the lanes all curve to the right.

https://www.youtube.com/watch?v=e0O0IsHvnxE


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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Wed Sep 12, 2018 2:03 am 
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To start off with, it might be wise to set it to "short"
There may well be something wrong with the system, mine never does this even when set to "long", but it does sometimes pick up objects by the wayside in curves. After all, it is just a stupid computer.
Curve+object approaching too fast right in front = FCM.

The FCM works with radar behind the grille. The LDW works with a camera under the mirror. The latter system is not reliable enough to integrate with the FCM; Lines on the road can be missing, crossing the lanes, etc.

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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Fri Sep 14, 2018 5:28 am 
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Location: Yorkshire end of M1, UK
My 2015 4hs used to trigger in multi-storey car parks till I set it to "short". I've only had it once since, when a car selected reverse instead of drive and backed out in front of me. It was quicker than I was at applying the brakes :shock:

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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Wed Sep 19, 2018 3:57 pm 
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jaapv wrote:
The LDW works with a camera under the mirror. The latter system is not reliable enough to integrate with the FCM; Lines on the road can be missing, crossing the lanes, etc.


Well Opel seem to think they have cracked this one. The brand new Insignia I had on hire in Nice last month, uses the LDW system to actually steer the car back into the lane for you - very disconcerting to have steering "snatched" from you at 80mph until you realise what is happening and get used to it. :lol:


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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Wed Sep 19, 2018 4:48 pm 
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Yes, but it won't function when the lines are faded, or criss-crossing the road after roadworks messed things up, etc. So even the Opel probably does not integrate the FCM with the LDW.
Volvo shivers your pants, I believe. At least the part of your behind that is nearest to the line crossed. :D.

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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Thu Sep 20, 2018 1:06 am 
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jaapv wrote:
Yes, but it won't function when the lines are faded, or criss-crossing the road after roadworks messed things up, etc. So even the Opel probably does not integrate the FCM with the LDW.
Volvo shivers your pants, I believe. At least the part of your behind that is nearest to the line crossed. :D.


As the Opel system actually adjusts the steering direction I wonder what happens if the lines suddenly disappear mid-correction or when you are trying to change lanes? :o


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 Post subject: Re: Forward Collision Mitigation false triggers
PostPosted: Thu Sep 20, 2018 7:07 am 
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Location: Worcestershire
greendwarf wrote:
jaapv wrote:
Yes, but it won't function when the lines are faded, or criss-crossing the road after roadworks messed things up, etc. So even the Opel probably does not integrate the FCM with the LDW.
Volvo shivers your pants, I believe. At least the part of your behind that is nearest to the line crossed. :D.


As the Opel system actually adjusts the steering direction I wonder what happens if the lines suddenly disappear mid-correction or when you are trying to change lanes? :o


As I understand it these systems won't 'fight' you if you indicate before manoeuvring, as you should of course ;)

Also firm manual steering action will over-ride the system and the system will back down.

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