Thread: Disco 2 CDL engagement linkage/lever

Originally Posted by PhilipA

I have been investigating marine windscreen wiper motors, that have an adjustable arc of 45 and 90 degrees.

There is a US company that makes them and they would seem ideal if somehow fitted with a limiting switch.
12V 2.5 Waterproof Wiper Motor with a 1.5" shaft and 80 degree Sweep | Marinco

I don't know how much torque is necessary to turn the lever but maybe it could be lengthened.
Still plotting as don't yet have a CDL.LOL
Regards Philip A

You could create the correct sweep pattern by a very simple crank and lever set up, utilize the complete sweep of the motor, but make the cranks on both the motor and CDL lever the appropriate length to have the correct motion relationship. I.e a short link on the motor, and a longer one on the CDL will give you less movement at the CDL end, the rest could be worked out quite simply, the joining link is fairly irrelevant, it just has to move freely without binding.

I fitted the factory lever to my car when I did the clutch two weeks ago, works superbly, and the time it would have taken to make one to my standards would have exceeded the cost (flat out with uni and work at the moment). That being said, everything else I will make when I have time.

Cheers
Will

Here is another idea. How about a valve solenoid? We need to work out the torque required but if this puppy can hold against an inch of water under pressure I'm sure it could switch our cdls. Just a thought.

Here is another idea. How about a valve solenoid? We need to work out the
torque required but if this puppy can hold against an inch of water under
pressure I'm sure it could switch our cdls. Just a thought.

I thought about that, butwould it have to be energised all the time to keep in low ratio AFAIK. Maybe there are some that stay extended.

Regards Philip A

I think I would run it energised to engage the CDL. As this would not generally be a real long time.

Originally Posted by mattg

Here is another idea. How about a valve solenoid? We need to work out the torque required but if this puppy can hold against an inch of water under pressure I'm sure it could switch our cdls. Just a thought.

Unfortunately the solenoid isn't holding back the pressure directly.
Most solenoid valves open a small pilot orifice which allows the available pressure of water to then operate the diaphragm of the valve either open or closed.
So I don't think any would have the power required. Bit of a hassle fiddling with the mechanics/linkages from the solenoid to CDL too.


I think the double acting air cylinder is the best option so far, using the vacuum system already in place from the EGR solenoids. Assuming your EGR is bypassed.
Just some vac line and a switch for "on/off" (engaged or disengaged)
Its a cheap reliable option.

I like that strangy what about a boot latch solenoid. Simple push pull and strong enough.

Like this
[ame]http://www.ebay.com.au/itm/351139334082[/ame]

I think the boot latch solenoid would work. So long as it is push pull.
I was playing with a D2 fuel latch solenoid and it is capable of the force required to engage the CDL, just not the ability to disengage.


The CDL mech only needs the initial push or pull past the detent and the spring on the drive dog engagement fork does the rest.


My only concern on electric stuff is water ingress.