vetboy45
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compressor sound?

Sun May 19, 2013 4:19 pm

Does anyone else have an occasional sound like a compressor or a pump coming from the motor compartment? It's pretty loud and I have never heard it from my tesla so I was just wondering what it is.
2013 Ford Focus Electric Black Leather
2013 Tesla Model S 60kWh Grey Tech Leather Sound Pano Roof

firewired
Posts: 59
Joined: Wed Aug 29, 2012 4:43 pm
Location: San Antonio, Texas

Re: compressor sound?

Sun May 19, 2013 7:20 pm

if it is right when you start the car, or stop. That is normal. I think that may be the electrical pump for the coolant fluid for the batteries.

WattsUp
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Re: compressor sound?

Sun May 19, 2013 8:00 pm

That's possible, athough I've always assumed it was a pump supplying pressure for the mechanical brakes. I sometimes feel a bit of feedback through the brake pedal that seems to coincide with the pump activity (which, to my ear, is a sort of soft "buzzing" noise).
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vetboy45
Site Moderator
Posts: 56
Joined: Mon Apr 15, 2013 8:19 am

Re: compressor sound?

Sun May 19, 2013 9:36 pm

When I start and stop is when I have noticed it so it is likely the same thing you're hearing. WattsUp - it is pretty hard to hear from inside the car with the windows up but pretty darn loud when outside the car or in a garage. I only ask because one of the coolest things about driving an electric is how it silently starts and moves, especially when giving someone a ride or just demonstrating the car. The big buzzing noise kind of ruins the effect.
2013 Ford Focus Electric Black Leather
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DavidJohnson
Posts: 38
Joined: Tue Feb 26, 2013 5:24 pm

Re: compressor sound?

Mon May 20, 2013 6:32 am

Could it be the noise generated to make pedestrians aware the car is moving? I think it makes it under 3 mph. Just wondering...

jmueller065
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Re: compressor sound?

Mon May 20, 2013 7:09 am

DavidJohnson wrote:Could it be the noise generated to make pedestrians aware the car is moving? I think it makes it under 3 mph. Just wondering...
I don't think it makes such a noise. Ford was entertaining various noises for such a purpose but since it hasn't been Federally mandated (yet) the FFE doesn't.


I'd guess that what they are hearing is a vacuum pump. The mechanical brakes are, most likely, operated just like the ICE version and use vacuum as a boost. In addition, since so many other systems on an ICE car use vacuum to operate (like the entire HVAC system) it is very likely that they just put in a vacuum system to make use of the existing parts.
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DavidJohnson
Posts: 38
Joined: Tue Feb 26, 2013 5:24 pm

Re: compressor sound?

Mon May 20, 2013 12:52 pm

My 2013 definitely makes the noise. It's kind of hard to describe but, it sort of sounds like a rattle under the hood. Hope this helps. :P

Electrogator
Posts: 4
Joined: Thu Apr 18, 2013 10:08 pm
Location: Tampa

Re: compressor sound?

Mon May 20, 2013 6:58 pm

I also hear the sound most times right after I open the door or a couple seconds. Sometimes, it is accompanied by a clicking sound. On occasion, right after I plug it in, also. I have never heard a sound exactly like it before, but I'm guessing some sort of pump.
2013 Ford Focus Electric - White Platinum Metallic

Charged Up
Posts: 59
Joined: Wed Aug 10, 2011 7:13 pm
Location: Virginia

Re: compressor sound?

Mon May 20, 2013 9:10 pm

I think the noise is in a compressor for the brake booster.

It is much louder than the Volt, however, it is much quieter and faster than what I had to use for my homemade BEV Ranger.

jmueller065
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Location: Southeastern MI
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Re: compressor sound?

Tue May 21, 2013 4:06 am

LOL 15 miles on my FFE and I heard this noise.

Starting up this morning. To me it sounded a lot like an aquarium pump (just a little louder).
2018 Cajun Red Chevy Bolt
2016 Magnetic C-Max Energi (lease returned)
2014 Sunset Escape
2014 Thor Axis (V-10)
2013 Focus Electric (lease returned Jan 2016 for the C-Max above)
https://spareelectrons.wordpress.com/

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