WG selonoid specs?

[myclone]

I did a search on the gnttype site and got nothing and only one thread on this site came up (it didnt contain the info I need) so Im asking here.

What is the supply voltage for the WG selonoid for the Buick stuff? Is it 12v or 5v? Im guessing 12 but dont know for sure.

Anyone know the frequency that the ECM supplies to the selonoid? How bout the duty cycle at say... ~15psi?

TIA for any info

 

[MeanBuicks]

The solenoid uses 12 volts. It's on the same supply voltage as the canister purge solenoid and the TCC solenoid. I don't know the frequency or specific duty cycles but it appears that it varies from 5% to 95%.

 

[myclone]

Thanks Mean Buicks... The syty stuff is about 32 Hz so I'll start there and tinker with the freq to see what might work.

Santa didnt bring me that nice LCD scopemeter I wanted last year so Ive never actually been able to measure the above. I guess I could get a really long extension cord and use the old techtronics bench scope and try.....

 

[gnjones231]

The frequency the GN solenoid is 60 Hz. SYTY is 32 Hz? Are you sure about that? A long time ago, a so-called GN guru said that the GN solenoid was 50 HZ....bzzzztttt.... Don't take anything for granted, you should really check it yourself to be sure. Now, can you operate a solenoid at 61 Hz or 59 HZ? Yes you can...it's not that critical....but there are limits. So if you're designing something, it's always (or at least most of the time) a good idea to operate things like the factory setup. HTH

Dave

 

[myclone]

Originally posted by gnjones231
The frequency the GN solenoid is 60 Hz. SYTY is 32 Hz? Are you sure about that?

Not completely sure. I posted this same question on the syty board and got a response from a fella the pretty well knows the in and outs of the syty ECM. It seems a little low to me but Im gonna experiment with some diff freq to see what works best. I was just looking for a starting point to work from.

A long time ago, a so-called GN guru said that the GN solenoid was 50 HZ....bzzzztttt.... Don't take anything for granted, you should really check it yourself to be sure.

I agree. Im a hopeless tinkerer and one of those ppl that like to see things "with my own eyes". Aggravates ppl at times but I usually learn something in the process of "seeing how things are done".

Now, can you operate a solenoid at 61 Hz or 59 HZ? Yes you can...it's not that critical....but there are limits. So if you're designing something, it's always (or at least most of the time) a good idea to operate things like the factory setup. HTH

Dave

Thanks for the info Dave. Im tinkering around with my own electronic boost control circuit. Just a pulse width modulated signal (commonly used as a speed control for DC motors) driving a FET to pulse the selonoid. Im just unsure of the frequency that the selonoid will be most happy with AND will give me good flow control.

If all goes well I will be able to use a MAP sensor to give me the reference V to control the pulse width. If it works like I think it will then no more setting the boost every time the weather changes and no more running vacuum/boost lines into the interior (Im using a air regulator to control my ext WG now). I had a HKS EVC III boost control but it died and replacement parts are ~$250. No thanks. I'll build my own for ~$50 and a few days labor.

 

[gnjones231]

Cool!...I made one of them many years ago....worked great....I used a 1525A PWM chip and an op amp as a pure integrator to compare a MAP output to a pot setting to control the 1525A. Set it and forget it. Have fun!

Dave