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  #25  
Old 08-28-2014, 08:27 PM
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Re: Difference bewteen terrain settings

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Originally Posted by bill_de View Post
Do you have a choice these days? It seems that no matter what you think is right, the system
will over ride you if it doesn't agree. I haven't been able to find a "do it yourself" mode.
Sure you do, Bill. Think about it... if you know how to drive properly then none of these "aids" should have to kick in to assist or save you.


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  #26  
Old 08-28-2014, 08:47 PM
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Re: Difference bewteen terrain settings

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Originally Posted by MDBones View Post
I'd say that has more to do with poor driving skills than not knowing how software algorithms work. And that has a lot to do with why they're used.

I'll take my ability to read terrain and road conditions and what my hands, feet and the seat of my pants tell me anyday over what software algorithms may or may not be doing in the background.

But that is the point, in a mech 4wd you took what you could see and feel and applied direct control to the wheels in response. You had a good understanding of how the wheels would respond to driver input in the different configurations you had available. You locked diffs, you feathered power, you booted it because you used your skills to control the car and make it respond how you wanted it to. And it would do what you told it.

In the electronic version that skill is taken away from you and the computer does it for you, it decides when to lock the diffs, when to feather the power, etc. We don't control that anymore (with the exception of low range/diff locking), the only control we have over it is choosing a mode that will decide when to do the things we previously did manually with less or more tolerance. Which is why it is good to understand what each of the modes do at a more technical level than the fluff that is already provided. It means choosing the most suitable mode to what the driver sees in front of them, just as we did in the mech days.

Anyway, I agree with the OP, I'd love to see some more technical details about the differences between the modes. I think those with engineering backgrounds like to understand the nitty gritty (I'm in IT, but I still like to know how things work in the mechanical and electronics worlds). As I said earlier, looking at the manual Mud and Sand modes look identical, snow mode looks like it would be preferable in sand, there must be more to it.....
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  #27  
Old 08-28-2014, 08:53 PM
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Re: Difference bewteen terrain settings

I'm with you Evolv0 and Benn0, there's heaps more to know about the variations between modes.

I had reason to need similar info regarding the Discovery 3, and after a bit of badgering a matrix was supplied by Land Rover. It was quite insightful... for example, in certain modes it listed the traction control response as "delayed then aggressive", "delayed then minimal" and similar. There were also details for gear shift, throttle sensitivity, ABS, etc.

Whilst some of these variables can be established by trial and error, to know all of them in advance seems far more beneficial.

Cheers,
Steve
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Old 08-28-2014, 08:57 PM
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Re: Difference bewteen terrain settings

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Originally Posted by Barboots View Post
I'm with you Evolv0 and Benn0, there's heaps more to know about the variations between modes.

I had reason to need similar info regarding the Discovery 3, and after a bit of badgering a matrix was supplied by Land Rover. It was quite insightful... for example, in certain modes it listed the traction control response as "delayed then aggressive", "delayed then minimal" and similar. There were also details for gear shift, throttle sensitivity, ABS, etc.

Whilst some of these variables can be established by trial and error, to know all of them in advance seems far more beneficial.

Cheers,
Steve
Now that would be handy, hopefully Jeep will eventually release something like this.
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  #29  
Old 08-28-2014, 09:00 PM
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Re: Difference bewteen terrain settings

Don't hold your breath for it, guys.
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Old 08-28-2014, 09:02 PM
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Re: Difference bewteen terrain settings

I have absolutely no expectations whatsoever mate!
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Old 08-28-2014, 09:07 PM
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Re: Difference bewteen terrain settings

LOL... that's good... you'd be greatly disappointed.
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Old 08-28-2014, 09:23 PM
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Re: Difference bewteen terrain settings

Every so often I come across interesting info in unusual places, for instance, a Jeep engineer gave this presentation on the design of the Grand's shell, strength and waterproofing:
http://www.autosteel.org/~/media/Fil...20Cherokee.pdf

Maybe they will let one of the 4WD system engineers out of his bunker for a day and we might get some more interesting info..... one day.
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Old 09-30-2014, 08:36 PM
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Re: Difference bewteen terrain settings

Well I found something interesting when I put the Jeep into Sand mode, and had terrain selected on the EVIC, it gives a description of the mode settings, for sand it says Traction control off, and aggressive gear selection. It definitely held lower gears for longer. Also found that when the ELSD locked in soft sand it held it locked for a long time, whereas in auto it seems to release within a few seconds....
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  #34  
Old 10-01-2014, 07:50 AM
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Re: Difference bewteen terrain settings

Quote:
Originally Posted by Benn0 View Post
Well I found something interesting when I put the Jeep into Sand mode, and had terrain selected on the EVIC, it gives a description of the mode settings, for sand it says Traction control off, and aggressive gear selection. It definitely held lower gears for longer. Also found that when the ELSD locked in soft sand it held it locked for a long time, whereas in auto it seems to release within a few seconds....
pretty cool, Thanks for sharing!
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Old 10-01-2014, 10:19 PM
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Re: Difference bewteen terrain settings

I'm guessing there will be a short description for the other modes too, but I didn't try any others...
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