In the end, does it make any real difference at all to the normally-driving, sensible everyday motorist? It's a bit like the hi-fi argumants over the sound and conductivity of different metals in connecting cables to me. We all hear differently, we all experience the speed of engine response differently, we all hear road noise from tyres differently ... you will never convince me that milliseconds of difference make any noticeable difference in the real world of human reactions. Now I wait for all the flak ...

Phew , much as I said back in post 4

you will never convince me that milliseconds of difference make any noticeable difference in the real world of human reactions.

Nor me. But that was one claim. What if those making other claims are right and it takes a second between you pressing a control and anything happening?

Edited 4 February, 201313 yr by r999

I've hidden some posts in an attempt to keep this on topic, put your handbags away and try and be civil to each other.

Thank you.

There is a video on the official BorgWarner site that explains how V generation Haldex coupling works: http://www.borgwarne...aldex-Gen5.aspx

The pump is still there, but it is combined with a pressure-regulating device, making the overall design simpler compared to IV gen.

Great video - thanks. Should be mandatory for all drivers to know how their car works and not dumbed down to a vehicle manual saying 'take to a dealer' for anything remotely interesting!

Great video - thanks.

The difference is claimed to be:

"The latest generation

provides cost and weight reduction

while maintaining its legendary

preemptive performance."

So no improvement in performance, just a bit cheaper and lighter and maybe a bit slower acting!

Read the interview text at Auto.cz again,it has been confirmed that new Octavia 4×4 will come with Haldex 5, but no news for Yetis transmission system update.

So no improvement in performance, just a bit cheaper and lighter and maybe a bit slower acting!

Blimey - someone's glass is half empty!

it has been confirmed that new Octavia 4×4 will come with Haldex 5

No wonder, as it has been built on the new MQB platform.

Bit of a thread bump, but I saw this posted on Facebook by Skoda.

 

The facelift gets the fifth generation Haldex.

 

http://www.skoda-auto.com/en/news/2013-08-14-yeti-facelift

 

Seven modern engines; front and all-wheel drive, manual transmission and DSG
There is a selection of four diesel and three petrol engines for the all-new ŠKODA Yeti - all turbocharged and with direct injection. The performance spectrum ranges from the 1.2 TSI with 77 kW and 105 hp to the 2.0 TDI with 125 kW/170 hp. The fifth generation front or all-wheel drive with Haldex coupling is fitted depending on the engine specs. With an automatic transmission, the ŠKODA Yeti exclusively uses the modern six or seven-speed dual clutch transmission (DSG). 

The 1.2TSI has 77kW and 105hp? That one must shift a bit!

I work for the company in the UK that produces the metal casting and cover for the Haldex. Before its shipped to Mexico

Edited 3 January, 201412 yr by J306TD

it's interesting how people always assume the newer solution is worse then predecessor without actually knowing how both works and without any proof to support such thesis.

I work for the company in the UK that produces the metal casting and cover for the Haldex. Before its shipped to Mexico

 

That could help explain why a replacement Haldex 4 costs in excess of £3k in the uk.  The parts go half way around the World before they reach the local dealer :wonder:

On the Octy III 4x4 the Haldex V comes with XDS (like the vRS); pretty sure the Haldex IV didn't have this feature. However I've not really paid attention as to whether the Yeti FL 4x4 also includes XDS.

 

http://www.volkswagen.co.uk/technology/braking-and-stability-systems/xds

 

 

TP

Both the original and fl yeti have 'xds' or whatever skoda want to badge it. In fact my abarth has it (fiat brand it as TTC): it's just software implementation on top of Bosch's abs-powered electronic differential lock. Instead of waiting for one of the wheels to actually slip before applying the brake to it, the ecu uses data from steering input, accelerometers and the wheel speed sensors to determine which wheel is about to slip. It then pre-emptily brakes that wheel, forcing torque to the opposite driven wheel.

No! XDS is a form of active suspension and works on the suspension system, not the braking system.

Not according to that vw website it's not.

Edited 4 January, 201412 yr by dcl5ad

I read TPs VW UK link that the XDS system monitors power output and also provides pressure to the inside wheel to prevent the wheel from spinning. The big arrow on the picture implies that pressure is applied vertically downwards on the offending wheel. So that means XDS equipped vehicles must have active suspension.

 

Or, it's a poor translation from VW Germany and the 'pressure' applied, actually means brake pressure.....

 

Looking at the FL brochure (the one that exists but doesn't...), there is no mention of XDS. It does have EDS (electronic diff lock) which would appear to do the same thing - ie use the ABS system to monitor and apply brake pressure to a spinning wheel.

 

ASR and MSR systems are on the Yeti but are torque control systems regulating power supply rather than physically 'slowing' a wheel. 

 

So does Octy III have XDS and not EDS? Different names for basically the same system?

As far as I'm aware XDS is an additional functionality which does similar things to other systems but under a different set of circumstances if you follow my drift (no pun intended). Quite sure my Yeti hasn't got it in terms of a function under that acronym, as I've not come across anything that remotely indicates it has.

 

See this film; brief mention of XDS about 3 minutes in

 

http://www.youtube.com/watch?v=9apQu8lpPE4

 

 

Note: no 2wd Octy III has XDS unless it's got the sport chassis like the vRS or the Elegance optional sports suspension pack.

 

 

 

TP

It is possible to enable XDS on a pre-FL Yeti using VCDS, which I've done. But TBH I haven't had a chance yet to test it properly to be able to see if it works or not.

Edited 4 January, 201412 yr by briskycat

In theory, any vehicle equipped with bosch abs 8.x can have this functionality enabled: they all have wheel acceleration sensors (rather than speed encoders) and the main pumps & ecus can provide individual wheel brake application, through EDL or ESP. The difference is just when the ecu decides to intervene - as the wheel slips with EDL, or before it does, with 'XDS'.

Additionally, 8.x allows you to do do other cool stuff, like proactive brake pad/disc drying in wet weather, feedback to the engine ecu, to prevent engine braking induced skids, trailer stability control and emergency brake assist.

Edited 4 January, 201412 yr by dcl5ad