Clunking Vibration type sound

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ericy said:
The basic calculation for how fast a car tire rotates is pretty easy.

http://www.csgnetwork.com/tirerevforcecalc.html

At 60mph, you get about 750 RPM. Depends on the tire, of course - that's another issue, but this is really just a rough back-of-the envelope calculation. Anyways that's about 12.5 rotations per second if you are going 60mph. I don't know how fast people were going when they made the recordings.

The reduction gear has a ratio of something like 7.9, so the motor itself turns that much faster. About 100 rotations per second.
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Using that as a basis and most noticeable tapping sound at low speed - say 10 kph (6.2 mph), 1.159 ( tire rotation as per calculator)* 7.9 ( reduction gear ratio) = 9 Taps / second which sounds about right of course slower at slightly lower speed.
 
Alex2802 said:
I went down to my dealer to get it fixed, they said they didn't hear it, but I kept talking with them and they eventually said to take a video and send it to them. Fingers crossed they can just get the new revised motor in and replace it soon.

https://photos.app.goo.gl/EbEYrS5HCZ72pGWS6

Video for others if they're interested, this is super low speed in a parking lot.
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Yep that's it, do you get the same in reverse?
 
Good afternoon, please tell me how many kilometers of your Kona. Very scary to hear about technical problems in our cars. Why is Hyundai silent about this problem? Do you have the opportunity to contact the Hyundai company directly without a dealer?
 
@Igor It's had it since about 3000km, it's at 6500 km now.

I don't think this is an immediate issue, just something that needs to be fixed. All cars and all new tech is going to have teething issues.
 
Alex2802 said:
Yea, the first part of the video is me reversing out of a parking spot, and then the rest is me driving forward.
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Very clear audio there. I would describe the sound as a "knock" rather than a tick or clunk. It's not easy to narrow the location by the frequency because CV joints could knock several times a rev. But if it was later identified as a loose bearing at the gearbox input I would say that the noise would match. It sounds not much different than a worn ICE rod bearing.
 
Rick2020Kona said:
Update on the noise from my 2020Kona EV Ultimate - 6,000K:
Hyundai Canada is replacing the motor with the New 701 series motor and they will be checking the gear reduction drive to see if it require replacement also. I was given a ICE Kona as a loaner.
The dealership & Hyundai have been very good.


Sent from my iPad using Inside EVs
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Picked up my Kona with new 701 series engine installed, so far so good. The gear drive was not replaced. They said it was checked over and is OK. We shall see. Location Vancouver island , BC, Courtney.


Sent from my iPad using Inside EVs
 
R P said:
Could it be something simple like mating bolts need to be retorqued? When it warms up, they tighten up themselves, and thus no ticking. The ticking might be the fretting between the mating surfaces when they loosen up. Just my uneducated speculation...
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Hyundai Canada is replacing the engine with a #701 series engine with a beefed up flange & larger bolts. I have heard that sometimes a new gear drive is required with the new engine.


Sent from my iPad using Inside EVs
 
Alex2802 said:
I went down to my dealer to get it fixed, they said they didn't hear it, but I kept talking with them and they eventually said to take a video and send it to them. Fingers crossed they can just get the new revised motor in and replace it soon.

https://photos.app.goo.gl/EbEYrS5HCZ72pGWS6

Video for others if they're interested, this is super low speed in a parking lot.
Click to expand...
Thanks for the video. Where in the motor compartment did you place it?
 
Just got a call from my local dealer (Langley) and they just got in the parts for my motor replacement (confirmed as the 701). Scheduled it to be done next Tues. So will see. Interestingly, haven't heard the tick tick recently, even though it has been cool here lately.
 
@Jamas I put it in the engine bay, it was held against one of the sides by a cable that was already there.

R P said:
Just got a call from my local dealer (Langley) and they just got in the parts for my motor replacement (confirmed as the 701). Scheduled it to be done next Tues. So will see. Interestingly, haven't heard the tick tick recently, even though it has been cool here lately.
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Is that 4 days including getting the part in, or it took them 4 days to swap the motor over. 4 days seems like a really long time to swap an electric motor over.
 
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