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 | Home > Technical > Terrain response - how does it work? |
 
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| npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090  
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Yes it works, and it does it very well |
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9th Oct 2010 9:08 pm |
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miracle device though, you still need to drive as the situation dictates
| chicken george Member Since: 05 Dec 2007 Location: N. Yorks Posts: 13289 
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Inside each wheel hub there is a tiny monkey he/she detects spin in each wheel and applies a tiny monkey sized foot brake to stop that wheel spinning ,
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9th Oct 2010 10:05 pm |
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| W.D.C.A.P.H. Member Since: 19 Feb 2010 Location: Stonehenge Posts: 310 
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Don't forget the tiny monkey telegraph across the axle though making sure that both monkeys apply the brakes at the same time when needed as per a monkey diff lock.
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10th Oct 2010 4:09 am |
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| npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090
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Theres only one monkey in a FL2 and he looks to have been drinking tonight |
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10th Oct 2010 5:59 am |
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| mini-eggs Member Since: 11 Jan 2010 Location: S.Wales Posts: 187  
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http://www.youtube.com/watch?v=ZNpzTnj7YMA
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10th Oct 2010 6:47 am |
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| wizking Member Since: 18 Mar 2010 Location: Around Posts: 1848  
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Hope this explains a bit for you Rob...; The intelligent system of quattro permanent four-wheel drive has a torque distribution between the front and rear that varies continuously to suit dynamic conditions. Only a small part of the torque is transferred to the rear wheels under normal conditions such as a straight road paved, but in demanding off-road situations, can be transmitted to the rear wheels if necessary, almost all the torque. It is an ideal arrangement that provides maximum grip in difficult conditions, while reducing traction, when it is not necessary, thus reducing rotational losses and fuel consumption. The torque distribution is continuously adapted. So if you find mud or snow on the road, for example, adjusts torque distribution between the front and rear provide optimum traction and improved safety at all times. The intelligent 4x4 system has been developed with Haldex, whose central coupling technology continuously modifies the torque distribution between front and rear axle through a hydraulically operated multi-disc wet clutch. However, Land Rover wanted an electronically-controlled center coupling linking the transmission shaft to the rear differential, which could pre-geared to sleep to reduce the loss of wheel traction in spurts, quickly geared to detect loss of traction and disengaged with the same speed without compromise of stability control systems. The system would also transmit the torque necessary to meet the demands of off-road traction. The resulting system has been used exclusively on Freelander 2 and proactively engages quickly and quattro permanent four-wheel drive. A new pump high-pressure pre-charge the hydraulic system as soon as you start the engine, enabling the 4x4 traction from the very start. This also reduces the time needed to obtain the maximum torque once it detects a wheel skating - 15 º freely rotating wheel (compared to the 60 th of more conventional units). The Haldex unit is designed to allow up to 1,500 Nm of torque transmission. An accumulator accelerates the response of the unit. The total transmission torque can be achieved in just 150 milliseconds. In fact, the new Haldex coupling system offers the advantages of a system of quattro permanent four-wheel proactive efficiency and low consumption of a front-wheel drive system. Adaptability Terrain Response is a key technology from Land Rover that fits the responses of the engine, transmission, central coupling and chassis systems of the vehicle to the demands of the terrain. Thus, optimizing the transmission and maximizes comfort and traction. It is available as standard on all models except the base The Freelander 2, the driver can choose any of four Terrain Response settings using a rotary knob: • Driving General - suitable for driving on the road or undemanding terrain. • Grass / Gravel / Sand - suitable for slippery conditions, on and off the road. • mud and ruts • Arena Each of these configurations optimized electronic and mechanical controls adapted to the chosen field. Terrain Response also controls the stability and traction devices as follows: • Dynamic Stability Control (DSC): designed to help curb the transmission of torque to the wheel that loses traction, although in some off-road situations may be desirable to retain the pair even though that loss. Terrain Response automatically adjusts the DSC to maintain proper pair. • Electronic Traction Control and antilock brakes: Terrain Response set these control systems to provide optimum grip, braking power and maximum reliability in the field concerned. • Hill Descent Control (HDC): the latest generation of Land Rover's award-winning technology that automatically limits the speed on the descents using the brakes and improves driver control on slippery descents. The HDC is activated automatically when you select the appropriate Terrain Response programs. The rates of decline vary depending on the selected surface. Terrain Response also changes the electronic center coupling configurations to optimize the four-wheel traction in difficult conditions. This system, operational, made its debut in 2004 in the Land Rover Discovery 3. |
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10th Oct 2010 9:49 am |
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| wdw Member Since: 13 Oct 2008 Location: Reading Posts: 127 
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Not on mine. Bill |
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10th Oct 2010 11:34 am |
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| yorkshirerob Member Since: 09 Oct 2010 Location: West Yorkshire Posts: 92 
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thanks very much Wizking and mini-eggs...answered my question.
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10th Oct 2010 12:22 pm |
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| ad210358 Member Since: 12 Oct 2008 Location: Here and There Posts: 7464
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To be honest CG that was a pretty good reply which made me smile, when it went on after the S version it went down hill from there. 
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10th Oct 2010 12:41 pm |
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| DrownedRat Member Since: 19 Oct 2009 Location: Back in the hot seat Posts: 496 
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YB - get your self on one of Land Rovers most wonderful experience days - all will become clear!
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11th Oct 2010 12:13 pm |
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| AndyC Member Since: 30 Nov 2007 Location: Where the snow dosen't melt when the sun is shining! Posts: 4165 
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Good to have a reasonable explanation of how the TR works  2007 Freelander 2 HSE TD4 Manual with Premium Pack & Moonroof.
Stornoway Grey with Ebony Black Pleather, Clear Indicators, Body Side Mouldings etc. |
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11th Oct 2010 1:02 pm |
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| yorkshirerob Member Since: 09 Oct 2010 Location: West Yorkshire Posts: 92
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Cheers DrownedRat. I actually did the half day thing at Coniston Cold last year. It was a freebie from when my father bought his Freelander.
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11th Oct 2010 8:27 pm |
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| AndyC Member Since: 30 Nov 2007 Location: Where the snow dosen't melt when the sun is shining! Posts: 4165
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and the responce from north of the border is.............  2007 Freelander 2 HSE TD4 Manual with Premium Pack & Moonroof.
Stornoway Grey with Ebony Black Pleather, Clear Indicators, Body Side Mouldings etc. |
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12th Oct 2010 5:44 am |
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| chicken george Member Since: 05 Dec 2007 Location: N. Yorks Posts: 13289
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Non , Mrs Dave took away his internet privileges It must be pointed out that the S cars without terrain response still have traction control, just that its not adjustable to suit varied conditions At work 
At home
"I can't always believe facts I read on the web" - Charles Dickens winner by default of the tractor vs caravan race |
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15th Oct 2010 4:12 pm |
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