- Posts
- 1,513
- Location
- Somerset (but I'm a Landanna)
I'm thinking it would be the same size.
You still need vanes for the hardening fluid to cling to.
If not, um - you could get out and blow it every couple of miles?
I dunno - I'm sure there's a way
Freelander 1 HCU - Hippo Coupling Unit (TM)
- Thread starter Hippo
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
I'm thinking it would be the same size.
You still need vanes for the hardening fluid to cling to.
If not, um - you could get out and blow it every couple of miles?
I dunno - I'm sure there's a way
Hippo
Lord Hippo
- Posts
- 54,746
Given the 2 options I'd rather keep me hellfire missiles and stick with ma vcu.
I'm thinking it would be the same size.
You still need vanes for the hardening fluid to cling to.
If not, um - you could get out and blow it every couple of miles?
I dunno - I'm sure there's a way
the only way i've found is to get my standard unit re-conditioned with the latest in fluid technology. they wouldn't tell me what they used but it was "new and improved"
my vcu gave up after 80k and took my entire drivetrain with it
- Posts
- 83,308
- Location
- Embasinga stocæ
it is certainly worth a try, but I have a sneaky suspicion it will not handle the torque.
Given the 2 options I'd rather keep me hellfire missiles and stick with ma vcu.
me tooplus, given the nature of electricity and magnetism, it could inadvertantly trigger an implosion of space time too
Hippo
Lord Hippo
- Posts
- 54,746
Interesting idea. The magnetism would have to be massive to get anywhere near 1 to 1 ratio to have permanent 4x4.
- Posts
- 83,308
- Location
- Embasinga stocæ
Electromagnetic clutch - Wikipedia, the free encyclopedia
it appears electro-electro clutches are vary rare except for low torque requirements - the usual scenario is electro-mechanical - see link
it appears electro-electro clutches are vary rare except for low torque requirements - the usual scenario is electro-mechanical - see link
- Posts
- 1,513
- Location
- Somerset (but I'm a Landanna)
Yup I just read up more on MR fluid.
The disadvantages are low shear strength, thickening over time and high cost.
Even if it works, it may not be any different to a conventional VCU anyway!
The disadvantages are low shear strength, thickening over time and high cost.
Even if it works, it may not be any different to a conventional VCU anyway!
- Posts
- 1,513
- Location
- Somerset (but I'm a Landanna)
Well I'm still looking at a clutch type idea, using 2 ABS sensors (which as we all know never go wrong! )
)All interesting stuff, good reading and a great idea. It all seems to be getting complicated tho. I think the vcu is actually a good idea but we are having problems simply because we arent changing them in time. Constant workload by the vcu because of pick n mix tyres and such like must surely limit the life of them. The vcu is a simple and effective system, its just a shame it doesnt last forever without needing replacement. Theres definetly advantages in keeping things simple. If I had to choose anything other a vcu it would be a lockable centre diff. New vcu beinv fitted tomorrow, looking forward to it
- Posts
- 83,308
- Location
- Embasinga stocæ
- Posts
- 1,513
- Location
- Somerset (but I'm a Landanna)
Well, it might be ultimately pointless, but so is mountain climbing.
And this is a bit safer.
And this is a bit safer.
Spacemonkey...
Well-Known Member
- Posts
- 1,048
- Location
- Darzet
Instead of trying to redesign the VCU, why not look into changing the diff or IRD gearing to match so we have 50:50 drive all the time instead of fake FWD bias? Surely this will stop the VCU eating itself anyway??? Or am I missing something?
- Posts
- 1,513
- Location
- Somerset (but I'm a Landanna)
You are missing something
The FWD priority protects the IRD.
If it were 50:50 drive, IRD wind-up would be worse!
The best thing would be to have a completely disconnected rear drive, until the front sped fast enough to need assistance from the rear.
I think...
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
You are missing something
The FWD priority protects the IRD.
If it were 50:50 drive, IRD wind-up would be worse!
The best thing would be to have a completely disconnected rear drive, until the front sped fast enough to need assistance from the rear.
I think...
how do you work that out , its not 50 /50 but equal speed ,with the differential in driven speeds as are ie slightly different v/c has to slip all the time somewhat equal sped of drive would mean v/c worked less as with rrc and p38
Last edited:
You are missing something
The FWD priority protects the IRD.
If it were 50:50 drive, IRD wind-up would be worse!
The best thing would be to have a completely disconnected rear drive, until the front sped fast enough to need assistance from the rear.
I think...
or better differentials perhaps, that actually protect the drivetrain form things like mismatching tyres, irregular tyre wear etc.......
Did you mean keeping or losing the vcu? Surely having the vcu protects you from wind up regardless of gear ratios. My previous post regarding strain on the vcu was thinking along the lines of you asking more of the rear wheels ( too much too soon) once the front wheels start to spin, instead of just a helping hand. On 50/50 , with a vcu it would probably need to be a much bulkier vcu? Or is it just getting late?:boom:
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
getting late
Similar threads
Freelander 1
Now we are 2.
