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Mini Mech
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49 Posts
Discussion Starter · #1 ·
What type of tire pressure monitoring system does the Mini use, indirect or direct?

Direct monitors pressure and temperature at each wheel, while indirect measures rotational speed of the wheel via the ABS system.




Federal Appeals Court orders NHTSA to rewrite regulation that would have
allowed for ineffective tire pressure monitoring systems




SmarTire Systems Inc. (OTCBB: SMTR) confirmed today that it strongly supports a recent decision by the U.S. Court of Appeals for the Second Circuit in New York directing the U.S. National Highway Traffic Safety Administration (NHTSA) to rewrite a regulation issued in July 2002 that defines standards for tire pressure monitoring systems (TPMS).


This regulation, part of the Transportation Recall Enhancement Accountability, and Documentation (TREAD) Act, currently give automakers the option of installing two types of TPMS, direct or indirect, for three years from 2003 to 2006, pending a final decision on system type after that. The Court said the NHTSA rule was "contrary to law and arbitrary and capricious" and "clearly wrong" in giving automakers the option to use the indirect TPMS.


"We strongly support the Court's decision and believe that direct TPMS technology is the superior approach and should be adopted by industry," said Robert Rudman, President and Chief Executive Officer of SmarTire Systems, Inc. "SmarTire's direct TPMS products meet or exceed NHTSA requirements and are available for OEM, aftermarket, and dealer or port of entry installation. The Company is well positioned to service additional demand from automakers that may reconsider their indirect TPMS strategy as a result of this ruling."


The direct TPMS includes a sensor located inside the tire that directly measures the temperature and pressure of each individual tire. It functions as soon as the vehicle begins to move, accurately measuring temperature and pressure, and issues timely warnings when deviations occur. It works on all road surfaces and full range of travel speeds.


Indirect systems, or ABS-based systems, measure the rotational speed differences between the left and right wheels to sense tire under-inflation. In general these systems have difficulty detecting more than one low tire and have performance constraints at high speeds and over varying road surfaces. Also, the time required to recognize a low tire pressure condition varies from one to ten minutes.


SmarTire Systems Inc. develops and markets proprietary tire monitoring systems for the transportation industry worldwide. Incorporated in 1987, SmarTire is a public company with offices in North America and Europe. Additional information can be found at www.smartire.com.
 

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Mini Mod
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9,227 Posts
People are complaining about the price of MINIs now. Throw in the cost of direct monitoring and see what happens.

Just like ABS and airbags. The technology will get cheaper and migrate it's way down the price range.

I'd rather NHTSA regulate getting stupid f***ers off the road altogether. Think how much that would help.
 

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MotorCityMadman
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3,793 Posts
obehave said:
I'd rather NHTSA regulate getting stupid f***ers off the road altogether. Think how much that would help.
Hear! Hear!

Like requiring special licensing for anyone driving a vehicle 2.5 tons or heavier would be a good start.
 

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Registered
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339 Posts
Of course they believe that the direct system is the best, they sell it and it's more expensive! Does anyone recall that there was actually a time when you ocassionally needed to check your oil level and tire pressures? :eek:
 

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Sponsor/Moderator/Other
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3,265 Posts
The biggest issue with direct monitoring is that you need to move the stupid sensors, or buy wheels that have them. Sure it won't be a big deal when every car has the sensors, but its still going to be a pain in the neck.

The only way I see direct as being better is if they go all out and give you pressure ratings for each wheel. I'd like to see at a glance that right front is 31 psi, left rear is 29psi, etc. Otherwise its no big benefit over indirect, if you're not a company trying to sell it, and the extra cost is bad.

And I've always thought (as do passengers) the warning light looks like a butt as well.
 

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Blue is the colour!
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13,507 Posts
Tom D said:
...Does anyone recall that there was actually a time when you ocassionally needed to check your oil level and tire pressures? :eek:
What do you mean! :eek: :p

Man, I'm a shocker, I'm okay at checking my tyre pressures, but in 8000kms I think I have only checked my car's oil once. Bad Liam!

:D
 

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Stella's Sugar Daddy :)~
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234 Posts
obehave said:
People are complaining about the price of MINIs now. Throw in the cost of direct monitoring and see what happens.

Just like ABS and airbags. The technology will get cheaper and migrate it's way down the price range.

I'd rather NHTSA regulate getting stupid f***ers off the road altogether. Think how much that would help.
Amen to that ohbehave!
 
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