Does anyone know how this type of compressor engages/disengages? There is no clutch at the front just a pully with a damper inside, the only connection is the one you can see at the back. Is there an internal clutch or maybe a pressure relief valve to take the load of the pump when not in use??
AC Compressor...
- Thread starter KingboyD
- Start date
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As far as I know on these, the pressure in the system is switch monitored, and when given a signal, a solenoid opens on the back of the pump to allow the refridgerant to pass - so there is no electric clutch at all.
I believe these need their own dedicated diagnostic checker but so long as there is refridgerant in the system, they are reliable.
John
I believe these need their own dedicated diagnostic checker but so long as there is refridgerant in the system, they are reliable.
John
That's how I understand it, Dave......the compressor spins all the time, but as its not circulating anything its not under load.
I don't know if its a better system than the conventional clutch type - but I must say I have found clutched compressors to get noisy after a good few miles.
John
I don't know if its a better system than the conventional clutch type - but I must say I have found clutched compressors to get noisy after a good few miles.
John
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Thanks John. Interesting. I really have no experience of AC at all. All snippets gratefully taken and stored for when needed. I did notice once that a large American pickup I was looking at once had an "little" (to me) electric clutch. The type of electric clutch I was familiar with was made by Heenan and Froude and was about three feet in diameter.
I suppose from a manufacturing POV, one unit makes more sense than two.
I suppose from a manufacturing POV, one unit makes more sense than two.
Thanks John! This particular compressor is of a VW Tiguan, the LP Pipe has come adrift due to the retaining bolt being left loose, all AC gas lost & oil too + crap sucked in from engine bay, this has caused the compressor to seize up & shear the bolt that connects the pulley to the pump drive oops! New pump & a pipe required!
If it was an older clutch type the seizure would not have happened as the compressor would not have still been driven!
Paul.
If it was an older clutch type the seizure would not have happened as the compressor would not have still been driven!
Paul.
