Speed-sensitive variable intermittent wipers
 

Hello All

I noticed this 'feature' on my 2005 Tiburon before and made a posting here,
to which there was not much response. I had asked whether others had
experienced that with their cars. Then the feature seemed to 'go away'.

Since this is not a feature in any brochure I have seen for this car, I can
only assume that it is something they decided to throw in.

Well it did not go away - it is just that I was using the slower
intermittent speeds where it does not work.

Next rainfall, set the intermittent speed to fastest then see if, when you
slow down to below about 20-25 mph or stop, the speed is intermittent
otherwise it is constant at the lower speed.

I guess they figure that at the slower speeds the rain is not falling hard
enough to go to constant speed.

Let us know if your Hyundai has this feature.

Best Regards,
Wayne Moses <wmoses@houston.rr.com> Wed, 04 Apr 2007 18:13:53 -0500

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Re: Speed-sensitive variable intermittent wipers
 

IIRC the speed sensitive wipers are not really set to speed but rather
what gear the transmission is in. It gives the same sense I suppose
but is probably easier to program. This was the case in my 03 Santa
Fe & 05 Elantra. ( I read this a long time ago and can't recall
where)

Re: Speed-sensitive variable intermittent wipers
 

Hello art.obrien@gmail.com,

> IIRC the speed sensitive wipers are not really set to speed but rather
> what gear the transmission is in. It gives the same sense I suppose
> but is probably easier to program. This was the case in my 03 Santa
> Fe & 05 Elantra. ( I read this a long time ago and can't recall
> where)

So this is a feature then ...

If it is dependent on the gear the car is in, then it reverts to intermittent
when I am in neutral, or 1st or 2nd because I could be coming to a stop or
pulling off or at a stop when it is intermittent. The minute I exceed about
20 - 25 mph (regardless or gear, it seems) the wipers go continuous.

Regards,
Wayne Mose

Re: Speed-sensitive variable intermittent wipers
 

It's definitely speed sensitive. If I recall correctly, the two settings
with the least delay have the potential to become low speed constant
operation. Once you cross a predetermined speed threshhold, it should
switch over.

Re: Speed-sensitive variable intermittent wipers
 

"hyundaitech" <notpublic@not.public.com> scribbled:

> It's definitely speed sensitive. If I recall correctly, the two settings
> with the least delay have the potential to become low speed constant
> operation. Once you cross a predetermined speed threshhold, it should
> switch over.
>
>

Plus there seems to be a rather large hysteresis.

(Going from memory here--) In my Sonata on the second-shortest delay
setting, it doesn't go into continuous mode until right around 50MPH, but
slowing down, doesn't "switch back" to delay until down to about 30 or so.

Re: Speed-sensitive variable intermittent wipers
 

Our '05 Tucson and '06 Sonata both have the speed sensitive
wipers....Wayne is correct, I also did not see anything in the vehicle
brochures about the feature. For both our cars I think the speed is
around 40.

Re: Speed-sensitive variable intermittent wipers
 

That sounds about right.

And thanks for using the word hysteresis. It's been so long since I've
heard it (about 16 years), I'd forgotten what it meant.

Re: Speed-sensitive variable intermittent wipers
 

Hello hyundaitech,

h> It's definitely speed sensitive. If I recall correctly, the two
h> settings with the least delay have the potential to become low speed
h> constant operation. Once you cross a predetermined speed threshhold,
h> it should switch over.

Thanks for confirming that. I can attest to the intermittent with the least
delay, but will also try the next longer delay to see if that also works.

I think that it is great that we get a feature that was not even mentioned.
Definitely better than the other way around!

Regards,
Wayne Moses
Houston, Texa

Re: Speed-sensitive variable intermittent wipers
 

Hello Don P.,

D> Plus there seems to be a rather large hysteresis.
D>
D> (Going from memory here--) In my Sonata on the second-shortest delay
D> setting, it doesn't go into continuous mode until right around 50MPH,
D> but slowing down, doesn't "switch back" to delay until down to about
D> 30 or so.

Hmmmm .... the plot thickens. Thanks for that tidbit. I will look for similar
performance when I try this out next time. Definitely a nice feature. Makes
sense also that one has to be going faster for the feature to switch over
to continuous, as the assumption is that the longer the delay, the less rain
is falling and hence the faster you must be travelling to accumulate enough
rain for the constant wipe.

Regards,
Wayne Moses
Houston, Texa

Re: Speed-sensitive variable intermittent wipers
 

Wayne Moses <wmoses@houston.rr.com> scribbled:

> Hmmmm .... the plot thickens. Thanks for that tidbit. I will look for
> similar performance when I try this out next time. Definitely a nice
> feature. Makes sense also that one has to be going faster for the
> feature to switch over to continuous, as the assumption is that the
> longer the delay, the less rain is falling and hence the faster you
> must be travelling to accumulate enough rain for the constant wipe.
>

That, plus the vehicle in front of you is spraying more water at the higher
speeds, too. Unless you follow at about 35 car lengths.