why don't car makers make more ABS TPMS systems rather than having four
stupid UHF transmitters with batteries flying around in circles?....stupid

On 03/01/2023 10:21, jim.gm4dhj wrote:
> why don't car makers make more ABS TPMS systems rather than having four
> stupid UHF transmitters with batteries flying around in circles?....stupid

There are no pressure sensors in the wheels of my car. The car just
monitors the rotations and reports a fault on the dashboard if one of
the tyres rotates differently because it has a low pressure.
Unfortunately I get many false warnings.

On 03/01/2023 13:22, Michael Chare wrote:
> On 03/01/2023 10:21, jim.gm4dhj wrote:
>> why don't car makers make more ABS TPMS systems rather than having
>> four stupid UHF transmitters with batteries flying around in
>> circles?....stupid
>
> There are no pressure sensors in the wheels of my car.  The car just
> monitors the rotations and reports a fault on the dashboard if one of
> the tyres rotates differently because it has a low pressure.
> Unfortunately I get many false warnings.

The only time I get false warnings is if I forget to reset the system
after having a new tyre fitted. The problem I once found was that,
because it only samples at intervals, a rapid leak, caused by a large
stone in the tread, wasn't indicated until after it had caused enough
damage for the tyre to be beyond repair.

--
Colin Bignell

On 03/01/2023 10:21, jim.gm4dhj wrote:
> why don't car makers make more ABS TPMS systems rather than having four
> stupid UHF transmitters with batteries flying around in circles?....stupid

ABS based systems take much longer to spot changes than the wireless
ones. Hence the reason for the wireless ones.

Proper cars offer both with the option to code off the TPMS version and
just use ABS system. Typically done when you swap your summer wheels and
tyres for your winter wheels and tyres and don't have TPMS in the winter
set.

A friend of mine had a bmw mini that was always complaining of one or more
tyre pressure problems, on checking nothing was ever wrong with any of them.
Are you saying then that they merely work on rotation or something with a
transmitter? Seems somewhat crude to me. Sounds like a job for a bit of
cardboard over the dash display. I'm sure you would notice a real flat!

As for brakes etc, there are so many reasons why the braking will vary, I'm
surprised they can be very accurate.
Brian

--

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"Michael Chare" <mUNDERSCOREnews@chareDOTorg.uk> wrote in message
news:tp1a64$24qha$1@dont-email.me...
> On 03/01/2023 10:21, jim.gm4dhj wrote:
>> why don't car makers make more ABS TPMS systems rather than having four
>> stupid UHF transmitters with batteries flying around in
>> circles?....stupid
>
> There are no pressure sensors in the wheels of my car. The car just
> monitors the rotations and reports a fault on the dashboard if one of the
> tyres rotates differently because it has a low pressure. Unfortunately I
> get many false warnings.

On Tue, 03 Jan 2023 21:21:51 +1100, jim.gm4dhj <kinvig.netta@ntlworld.com>
wrote:

> why don't car makers make more ABS TPMS systems rather than having four
> stupid UHF transmitters with batteries flying around in
> circles?....stupid

Much more difficult to design and don't give a direct tire pressure
measurement.

On 03/01/2023 13:22, Michael Chare wrote:
> On 03/01/2023 10:21, jim.gm4dhj wrote:
>> why don't car makers make more ABS TPMS systems rather than having
>> four stupid UHF transmitters with batteries flying around in
>> circles?....stupid
>
> There are no pressure sensors in the wheels of my car.  The car just
> monitors the rotations and reports a fault on the dashboard if one of
> the tyres rotates differently because it has a low pressure.
> Unfortunately I get many false warnings.
good ....ABS type then...

On 03/01/2023 13:44, Colin Bignell wrote:
> On 03/01/2023 13:22, Michael Chare wrote:
>> On 03/01/2023 10:21, jim.gm4dhj wrote:
>>> why don't car makers make more ABS TPMS systems rather than having
>>> four stupid UHF transmitters with batteries flying around in
>>> circles?....stupid
>>
>> There are no pressure sensors in the wheels of my car.  The car just
>> monitors the rotations and reports a fault on the dashboard if one of
>> the tyres rotates differently because it has a low pressure.
>> Unfortunately I get many false warnings.
>
> The only time I get false warnings is if I forget to reset the system
> after having a new tyre fitted. The problem I once found was that,
> because it only samples at intervals, a rapid leak, caused by a large
> stone in the tread, wasn't indicated until after it had caused enough
> damage for the tyre to be beyond repair.
>
>
useless TPMS

On Wed, 04 Jan 2023 04:27:38 +1100, Brian Gaff <brian1gaff@gmail.com>
wrote:

> A friend of mine had a bmw mini that was always complaining of one or
> more
> tyre pressure problems, on checking nothing was ever wrong with any of
> them.

> Are you saying then that they merely work on rotation

Yep.
https://en.wikipedia.org/wiki/Tire-pressure_monitoring_system#Indirect_TPMS

> or something with a
> transmitter?

Not with an ABS TPMS.

> Seems somewhat crude to me.

Its actually very sophisticated and hard to do well.

> Sounds like a job for a bit of
> cardboard over the dash display. I'm sure you would notice a real flat!

You don't with my Hyundia Getz. In spades with under inflation.

On 03/01/2023 18:52, Rod Speed wrote:
> On Tue, 03 Jan 2023 21:21:51 +1100, jim.gm4dhj
> <kinvig.netta@ntlworld.com> wrote:
>
>> why don't car makers make more ABS TPMS systems rather than having
>> four stupid UHF transmitters with batteries flying around in
>> circles?....stupid
>
> Much more difficult to design and don't give a direct tire pressure
> measurement.
but they don't cost ypu a fortune either....

On 03/01/2023 15:42, mm0fmf wrote:
> On 03/01/2023 10:21, jim.gm4dhj wrote:
>> why don't car makers make more ABS TPMS systems rather than having
>> four stupid UHF transmitters with batteries flying around in
>> circles?....stupid
>
> ABS based systems take much longer to spot changes than the wireless
> ones. Hence the reason for the wireless ones.
>
> Proper cars offer both with the option to code off the TPMS version and
> just use ABS system. Typically done when you swap your summer wheels and
> tyres for your winter wheels and tyres and don't have TPMS in the winter
> set.
>
worst of both worlds then

On 03/01/2023 20:04, jim.gm4dhj wrote:
> On 03/01/2023 15:42, mm0fmf wrote:
>> On 03/01/2023 10:21, jim.gm4dhj wrote:
>>> why don't car makers make more ABS TPMS systems rather than having
>>> four stupid UHF transmitters with batteries flying around in
>>> circles?....stupid
>>
>> ABS based systems take much longer to spot changes than the wireless
>> ones. Hence the reason for the wireless ones.
>>
>> Proper cars offer both with the option to code off the TPMS version
>> and just use ABS system. Typically done when you swap your summer
>> wheels and tyres for your winter wheels and tyres and don't have TPMS
>> in the winter set.
>>
> worst of both worlds then
and over complicated

On 03/01/2023 17:27, Brian Gaff wrote:
> A friend of mine had a bmw mini that was always complaining of one or more
> tyre pressure problems, on checking nothing was ever wrong with any of them.
> Are you saying then that they merely work on rotation or something with a
> transmitter? Seems somewhat crude to me. Sounds like a job for a bit of
> cardboard over the dash display. I'm sure you would notice a real flat!
>
> As for brakes etc, there are so many reasons why the braking will vary, I'm
> surprised they can be very accurate.
> Brian
>

Brian,

The TPMS is a small pressure sensor and radio transmitter mounted inside
the wheel. A receiver is in each wheel well. The TPMS has a Lithium cell
(such as a CR2032) inside. They are sealed for life and typically that
is 4-10years. After that you install new ones. Prices vary but they
start around £25 each. Of course premium brand main dealers may ask a
lot, lot more for the same item. Some TPMS units need configuring to the
car, other cars are self-learning when you swap wheels.

There is a centrifugal switch so the unit is only powered when the car
is moving fast enough. The inbuilt computer in the sensor measures the
pressure and sends the data over the radio then goes to sleep for some
time, wakes up and then measures the pressure and send it again and
sleeps. My car shows pressures in the tyres to 1/10th Bar accuracy. I
can see my nearside front tyre looses pressure faster than the other 3.

All new cars have TPMS now but if you have run flat tyres it's
essential. They can get punctured and run flat and the handling may not
change enough for you to immediately notice. Or ever notice if you are
clueless and mechanically inept. Whilst you can drive on them when flat
you can't drive that far or at speed so you need something to tell you
that you have a flat. It may not quickly respond to a blowout condition,
it will warn you that a tyre is deflating so you can stop and do
something. But not fit the non-existent spare tyre!

Warning lights on a dashboard are a MOT fail nowadays and as they're all
integrated LCD monstrosities it's not like you can remove the bulb any
more .

On 04/01/2023 00:00, mm0fmf wrote:
> On 03/01/2023 17:27, Brian Gaff wrote:
>> A friend of mine had a bmw mini that was always complaining of one or
>> more
>> tyre pressure problems, on checking nothing was ever wrong with any of
>> them.
>> Are you saying then that they merely work on rotation or  something
>> with a
>> transmitter?  Seems somewhat crude to me. Sounds like a job for a bit of
>> cardboard over the dash display. I'm sure you would notice a real flat!
>>
>>   As for brakes etc, there are so many reasons why the braking will
>> vary, I'm
>> surprised they can be very accurate.
>>   Brian
>>
>
> Brian,
>
> The TPMS is a small pressure sensor and radio transmitter mounted inside
> the wheel. A receiver is in each wheel well. The TPMS has a Lithium cell
> (such as a CR2032) inside. They are sealed for life and typically that
> is 4-10years. After that you install new ones. Prices vary but they
> start around £25 each. Of course premium brand main dealers may ask a
> lot, lot more for the same item. Some TPMS units need configuring to the
> car, other cars are self-learning when you swap wheels.
>
> There is a centrifugal switch so the unit is only powered when the car
> is moving fast enough. The inbuilt computer in the sensor measures the
> pressure and sends the data over the radio then goes to sleep for some
> time, wakes up  and then measures the pressure and send it again and
> sleeps. My car shows pressures in the tyres to 1/10th Bar accuracy. I
> can see my nearside front tyre looses pressure faster than the other 3.
>
> All new cars have TPMS now but if you have run flat tyres it's
> essential. They can get punctured and run flat and the handling may not
> change enough for you to immediately notice. Or ever notice if you are
> clueless and mechanically inept. Whilst you can drive on them when flat
> you can't drive that far or at speed so you need something to tell you
> that you have a flat. It may not quickly respond to a blowout condition,
> it will warn you that a tyre is deflating so you can stop and do
> something. But not fit the non-existent spare tyre!
>
> Warning lights on a dashboard are a MOT fail nowadays and as they're all
> integrated LCD monstrosities it's not like you can remove the bulb any
> more .
>
>
fight against it...buy three bangers like me