Large 12v solenoide valve

[JustenGT8]

I'm chasing a large (1.5-2 inch) electronially controlled valve to replace the current pneumatic valve. I need to control the valve under boost and vac so figure a solenoide will be the best way to do this.

Dia around 1.5-2 inches

Anyone know anything readily available..that's not huge?

[Duk]

Check out Goyen valves.
http://www.tycoflowcontrol.com.au/TE...aphragm_valves

[Timma]

Justen whats the reason for such a big port size on the valve? Just about all valve manufactures will have a valve that will do this function but all will be quite large considering the casting to fit either 1.5inch/2inch port. I know I work for a pneumatics company. I'm guessing it needs to be a 2way design (on off arrangement).
I few things to consider are:
Will it be normally closed? or normally open?
Flow Capacity
Operating Pressure Range
Temperature Range (Under-bonnet Temps)
Send me a PM I might be able to come up with something

[brett_celicacoupe]

anti-lag??

[thechuckster]

are you controlling the amount of valve opening (e.g. vie PWM) or just open and shut.

[JustenGT8]

Just open shut but i think i'm trying to be too clever for my own good. I certainly can't find anything even close to what i'm after.

[wilbo666]

Those electronic controlled muffler type valves the sort of thing that may work?

Cheers
Wilbo

[The Witzl]

I think you just said it yourself Justin

[JustCallMeOrlando]

While Witzl is probably right, what ARE you trying to achieve Justen?

[Ben Wilson]

A Chinese wastegate + a generic VSV may do the job (whatever the job might be). That's assuming that you're planning on having some positive pressure in the area. Knowing you, I can't imagine you not having positive pressure in the area

I just happen to be thinking about a similar setup for an idea I'm working on...

[big_zop]

What about a servo controlled wastegate. That is what we use for our FSAE car - but it is used to reduce back pressure rather than to control boost - that is what the Variable Vane Turbine is for It is controlled through its own map on the M800, and a separate one for the vanes (the servo for that is below the wastegate servo in the bottom pic).

Here are some pics of the the valve itself, completely manufactured of course. I may be able to get you the models for it (in Solidworks) and some info so you can upsize it to suit your application (this is a 600cc I4 motorbike engine breathing through a 20mm restictor)



And here is the servo - from memory there is no failures even with the proximity to the headers. And the top of the car is ducted to the IC so no fresh air to get to it from the top.



Larger pics available if you like.

[JustenGT8]

Thanx for that. As a Plan C that would work and easy enough to fab..,..in fact as a low temp use i could prob just get away with a motorcycle TB.

Too much effort for a bit of an experiment though.

[The Witzl]

That looks like a massive hobby-type servo, similar to the ones used on a 1/5th scale "baja" RC buggy.

Any details on the servo specifications? What sort of torque ratings etc?
With such a long actuator arm, i think temperature wouldnt be such a huge issue either. Nice job on the fab work too... can i have a turn?

[big_zop]

I will post up the spec when i can, from what i recall its a massive hobby digital servo.

In regards to temperature, i wasnt actually talking about transfer from the wastegate through the actuator, but the proximity of it to the headers. remember it is essentially in a closed box (and way up the top). the only way air is getting in is through the hole down the bottome (between the sump and firewall) without anything to actually direct it up there.

[Ben Wilson]

as a low temp use i could prob just get away with a motorcycle TB.

Depends on how well you need it to seal (and how much pressure it needs to hold).