Wheel Articulation - TRS Interaction

[iSurfvilano]

Out of curiosity, does anyone know the allowance/restriction of wheel articulation based on the 5 TRS settings? It felt that when I decided to go over a curb to turn around during traffic that the "Special Programs Off" had a lot of restriction, but I could be wrong. I would guess that mud ruts and rock crawl would have the most allowance, but hey, I don't know the actually specs...wondering if anyone actually knows. Thanks! Cheers!

 

[umbertob]

AFAIK, Terrain Response controls a variety of systems and sub-systems, but not the air suspensions (besides automatically engaging Off-Road height in certain programs.) Articulation should be the same, regardless of which program you are in.

 

[mbw]

The control of the cross linking could be impacted by the TR mode. I think in normal drive it is not trying to cross link as aggressively.

 

[umbertob]

I posted the link in the past, but here is an interesting presentation paper that introduced the then-revolutionary LR's Terrain Response at an All-Wheel Drive Congress (yes, they actually have those!) organized by Magna Steyr in Graz back in 2005. It is pretty thorough in explaining which systems get involved - and how - in each Terrain Response mode. Although the TR system has gone through software revisions and refinements since its intro 10+ years ago, the "guts" and strategies of the various programs remain almost unchanged.

https://app.box.com/s/3u4f4hyuqparsxe0ovhoolt9d3vpktds

As I recall, on certain Land Rover vehicles (RRS) equipped with optional Dynamic Response - aka Active Roll Control - the hydraulically controlled stabilizer bars that minimize body roll on the road will decouple/disengage under certain TR programs or in low range, to allow for increased articulation when off-road. However, this doesn't apply to the LR3 and LR4, as neither of those vehicles can be equipped with Dynamic Response / ARC from the factory.

 

[catman]

Thanks for reposting, that was fascinating to read!