Haldex AWD system

Fat Magpie · Jan 17th, 2016, 18:43

This is my first car with the Haldex system, I have owned older more primitive 4x4's.
Anyhow from what I am reading the Haldex system has a little lag before engaging, so if you do get stuck it might require a few sec on wheel spinning before Haldex fully engages. How this works with DTSC on should be interesting.

K5 Gus · Jan 17th, 2016, 19:44

Are you sure ? My understanding is that it transferred the power to the appropriate wheels more or less instantly, ie fractions of a second.

NigelDay · Jan 17th, 2016, 19:59

Quote:

Originally Posted by K5 Gus

Are you sure ? My understanding is that it transferred the power to the appropriate wheels more or less instantly, ie fractions of a second.

The delay can be programmed. I seem to recall reading a report that some CR-Vs did not perform particularly well in a Swedish snow / hill start test, but then Honda 'adjusted' the characteristics of the system to improve performance in this test.

K5 Gus · Jan 17th, 2016, 20:22

Not sure if http://www.awdwiki.com/en/haldex/ is reliable, but it says that Haldex Gen 1 and 2 react in a quarter of a wheel turn, whilst Gen 3, 4 and 5 are proactive, ie the electronics can pre-tension the clutch and activate all wheel drive before a wheel slip occurs.

Fat Magpie · Jan 17th, 2016, 20:38

I am not sure, just going on comments on youtube videos showing XC60's offroading.

Harvey1512 · Jan 18th, 2016, 10:15

I had a Yeti for a couple of years with the Haldex system. You were completely unaware of any delay. The car just drove. It managed in muddy fields, on untreated snowy roads. Fantastic. The only times I knew it was working was when I was not in the car myself and I could see front wheels not turning and yet it was still moving forwards. Don't worry about it, just enjoy.

id5 · Jan 18th, 2016, 17:39

Quote:

Originally Posted by Fat Magpie

I am not sure, just going on comments on youtube videos showing XC60's offroading.

I think what you are seeing is the Haldex system testing grip by spinning a wheel a 1/4 turn to see if it has gained any grip, some time after it noticed that there was no grip.

Fat Magpie · Jan 26th, 2016, 20:19

Found this video by Volvo offering some more information

https://www.youtube.com/watch?v=RxpbI0ABpoI

[YOUTUBE]?v=RxpbI0ABpoI[/YOUTUBE]

RoyMacDonald · Jan 26th, 2016, 21:08

Quote:

Originally Posted by Fat Magpie

I am not sure, just going on comments on youtube videos showing XC60's offroading.

I think what you are seeing is the limitations of the video film affect on wheel rotation.

Interesting video here of the XC60 against a Merc GLK. I think the plan was to get the XC60 stuck and tow it out. Just refused to get stuck though.

https://www.youtube.com/watch?v=AUWg1U9kjPg

RoyMacDonald · Jan 26th, 2016, 21:09

Quote:

Originally Posted by Fat Magpie

Found this video by Volvo offering some more information

https://www.youtube.com/watch?v=RxpbI0ABpoI

[YOUTUBE]?v=RxpbI0ABpoI[/YOUTUBE]

Good video. Covers all the relevant points.

Jan 17th, 2016, 18:43	#1
Fat Magpie Senior Member Last Online: Jun 17th, 2024 15:33 Join Date: Mar 2015 Location: Belfast and London	Haldex AWD system This is my first car with the Haldex system, I have owned older more primitive 4x4's. Anyhow from what I am reading the Haldex system has a little lag before engaging, so if you do get stuck it might require a few sec on wheel spinning before Haldex fully engages. How this works with DTSC on should be interesting. __________________ XC60 MY10 AWD D5 Summum 205 PS, Geartronic, Winter pack, Aux diesel heater, Xenons, Family pack, Tinted rears, Moonroof, Parking sensor F&R, Premium sound, Car phone, Reversing camera, Lane departure, Hill decent, Savile Grey, Android Head Unit

Jan 17th, 2016, 19:44	#2
K5 Gus Senior Member Last Online: Nov 1st, 2023 12:47 Join Date: Aug 2014 Location: Perthshire	Are you sure ? My understanding is that it transferred the power to the appropriate wheels more or less instantly, ie fractions of a second. __________________ 2014 (MY2015) V60 SE D4 Nav, Flamenco Red

Jan 17th, 2016, 20:22	#4
K5 Gus Senior Member Last Online: Nov 1st, 2023 12:47 Join Date: Aug 2014 Location: Perthshire	Not sure if http://www.awdwiki.com/en/haldex/ is reliable, but it says that Haldex Gen 1 and 2 react in a quarter of a wheel turn, whilst Gen 3, 4 and 5 are proactive, ie the electronics can pre-tension the clutch and activate all wheel drive before a wheel slip occurs. __________________ 2014 (MY2015) V60 SE D4 Nav, Flamenco Red

Jan 17th, 2016, 20:38	#5
Fat Magpie Senior Member Last Online: Jun 17th, 2024 15:33 Join Date: Mar 2015 Location: Belfast and London	I am not sure, just going on comments on youtube videos showing XC60's offroading. __________________ XC60 MY10 AWD D5 Summum 205 PS, Geartronic, Winter pack, Aux diesel heater, Xenons, Family pack, Tinted rears, Moonroof, Parking sensor F&R, Premium sound, Car phone, Reversing camera, Lane departure, Hill decent, Savile Grey, Android Head Unit

Jan 18th, 2016, 10:15	#6
Harvey1512 Premier Member Last Online: Jan 30th, 2021 12:00 Join Date: Aug 2008 Location: Northumberland	I had a Yeti for a couple of years with the Haldex system. You were completely unaware of any delay. The car just drove. It managed in muddy fields, on untreated snowy roads. Fantastic. The only times I knew it was working was when I was not in the car myself and I could see front wheels not turning and yet it was still moving forwards. Don't worry about it, just enjoy. __________________ I used to have an S40, V60 and XC60 so I am allowed here, honest.

Jan 26th, 2016, 20:19	#8
Fat Magpie Senior Member Last Online: Jun 17th, 2024 15:33 Join Date: Mar 2015 Location: Belfast and London	Found this video by Volvo offering some more information https://www.youtube.com/watch?v=RxpbI0ABpoI [YOUTUBE]?v=RxpbI0ABpoI[/YOUTUBE] __________________ XC60 MY10 AWD D5 Summum 205 PS, Geartronic, Winter pack, Aux diesel heater, Xenons, Family pack, Tinted rears, Moonroof, Parking sensor F&R, Premium sound, Car phone, Reversing camera, Lane departure, Hill decent, Savile Grey, Android Head Unit

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