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On Board Air Compressor?

Discussion in 'Model S' started by Jashev, Jun 17, 2017.

  1. Jashev

    Jashev Supporting Member

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    Hi Guys,

    Just noticed a Facebook posting where it was stated that there is an on-board air compressor that can be accessed on cars with SAS. Before I go tearing my frunk apart, I was wondering if this was true. Supposedly it has a standard Shrader valve connection that would accept an air hose for tire inflation.

    Is this for real? Thanks.
     
  2. Tam

    Tam Active Member

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    Logically, I think the volume required for the system is so small to make it practical for tires.
     
  3. jddssc121

    jddssc121 Member

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    GM used to have access on some of their SUVs (inflating bike tires, etc)
     
  4. thimel

    thimel Member

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    Never heard of this before. Doubt it is true. I do have the separate air compressor that you can plug into the cigarette lighter.
     
  5. mrElbe

    mrElbe Active Member

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    The only on-board compressor is the A/C compressor and air suspension pump.
     
  6. jddssc121

    jddssc121 Member

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    Considering I owned a GMC that did it, I can assure you it is true..... but thanks for calling me a liar :)
     
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  7. Mrwatchdawg

    Mrwatchdawg Member

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    GM did have that. One of those convenience features.
     
  8. thimel

    thimel Member

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    I was referring to the Tesla in my remark in answer to the OP. Had no intention of calling anyone a liar.
     
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  9. Kutu

    Kutu Member

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    It would be nice. Even the super-ugly Pontiac Aztec had one!
     
  10. Saghost

    Saghost Active Member

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    SAS obviously uses an onboard air compressor. I've never read of people accessing it or using it for another purpose. GM did have such an arrangement on the Aztec and some others of that generation, so it wouldn't be unprecedented.
     
  11. Joe F

    Joe F Member

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    Had a 2000 Bonneville SSEi with air shocks that had a Schrader valve in the trunk, and came with a long hose and gauge to inflate tires. Surprised Tesla did not add that feature. Should have been simple to do.
     
  12. Jashev

    Jashev Supporting Member

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    Thanks all. It certainly makes sense to me that there is an air compressor with the SAS system. Just wondered if anyone had tried to access it for tire inflation and whether it had the capacity to support that.
     
  13. David99

    David99 Active Member

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    Even if it worked, you would still need a long enough hose that reaches all 4 tires. I got a small 12 Volt compressor. Helped me a few times already. The first time I had a flat I use a hand pump and ... well that was my workout for that day :) I bought the small portable compressor after that.
     
  14. whitecotton

    whitecotton Member

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    The valve is pretty easy to get to in the frunk, just take off the middle plastic piece and you will see it.
     
  15. MRPLUGIN

    MRPLUGIN Member

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    A lot air suspension systems these days are a sealed system that is full of nitrogen with a storage tank. to minimize corrosion/contamination I believe.
     
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  16. jimmyz80

    jimmyz80 Member

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    When I was a kid we had an Oldsmobile Silhouette that had auto-leveling suspension. There was a panel in the cargo area you could open up to expose an air hose and on/off switch that I'm pretty sure used the same compressor as the suspension. We never found a single reason to use it.
     
  17. JohnnyG

    JohnnyG Weee!

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    Yes, the Tesla *is* a closed loop system with an onboard air tank. The system works by using a pump to move the air between the strut bladders and the tank, depending on if you are raising or lowering. That said, I don't know if our system is filled with Nitrogen or not. There is a standard Schrader valve on the tank, and the tank is easily accessible under the cowling cover that can be removed under the frunk lid. It is *possible* that the system can replenish itself via the onboard pump, in the event of a slow leak. Unfortunately I can not confirm this.
     
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