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					Greater safety, less fuel consumption with auto-train/auto-learn TPMS



Johnson Controls Introduces New Tire Pressure
Monitoring System at the IAA


Burscheid (Germany) – 13 August 2009. “Greater safety, less fuel
consumption” will be the theme at Johnson Controls, one of the world’s
leading suppliers of automotive interior systems and electronics, when it
presents a self-initializing and direct-measuring tire pressure monitoring
system (TPMS) at the 63rd IAA (International Motor Show) in Frankfurt.
With automatic localization of the tire pressure sensors, the new-
generation TPMS enables drivers to change wheels containing TPMS
technology by themselves – making a trip to the authorized service center
unnecessary. Johnson Controls has managed to reduce system complexity
as well as costs with the integrated TPMS. Tire pressure control even
improves driving safety and comfort while reducing fuel consumption and
with it CO2 discharge.



As part of its efforts to reduce CO2 emissions, the EU is planning to make
tire pressure monitoring systems compulsory as of 2012, since incorrect
tire pressure increases fuel consumption and emissions. However, it is
more than just environmental concerns that are driving the European
Commission. Improper tire pressure also increases wear and tear on tires,
which lengthens braking distances and impairs a vehicle’s handling.
Therefore, defective tires and creeping pressure loss also increase the risk
of accidents.



What sets the new TPMS from Johnson Controls apart is the system’s
adaptive auto-learn capability to detect the wheels’ sensor positions. “This
new-generation tire pressure monitoring marks the evolution of our TPMS
technology. This system automatically detects the sensors and determines
their positions,” explained Krister Gamaggio, Product Director of Body
Electronics at Johnson Controls. At the heart of the innovation is a
patented auto-train/auto-learn algorithm integrated into the TPMS receiver.
It automatically calculates the positions of each tire sensor, analyzing
signal input from the ABS and ESP control unit at the start of a journey.
There is no need for a manual learning procedure, even after a tire change.
“This is new because in the past, changing wheels with comparable
systems would have necessitated each new tire pressure sensor to be
assigned to its respective position. And this is a manual initialization
procedure requiring skilled authorized service center personnel,” added
Krister Gamaggio.



A new set of tires can be localized within two to three minutes. The system
can also permanently save another four sensor IDs, increasing the speed
with which an additional set of “known” tires, such a winter tires, is
positioned. After the system detects these saved IDs, the sensors are
localized quicker, even if these tires are mounted in different positions than
before.



Innovative system solution with rapid analysis of values

The system reports low pressure just as precisely for one individual tire as
for all four tires. The sensor technology can even detect a minimal 70 mbar
change in pressure. When pressure is constant, the current value is sent to
the receiver once per minute. But if the system detects any abnormality, it
moves to a faster mode: The sample rate is increased so that the sensor
now takes a measurement several times per minute. If a pressure
difference exists, the sensor immediately sends a sequence to the receiver
with the new values. The transmission pattern ensures that even a
marginal pressure loss during a journey is indicated within 10 seconds, or
as soon the car is started after being parked. And even when the vehicle is
parked, the tire pressure is still measured regularly, but at a lower
frequency for energy-saving purposes. The sensor battery has a lifespan of
around nine years.



Maximum functionality with optimized system costs

The TPMS from Johnson Controls is a direct-measuring system. But unlike
comparable systems, it only uses a single antenna, which is integrated
directly into the TPMS control unit. This reduces component costs while
eliminating the need for additional cabling. The patented algorithm is the
key to this cost-optimized solution, since it enables the definitive
localization of the sensors without additional components. Because the
software in the receiver is used to calculate all of the information needed to
analyze the signals, no other components apart from the tire sensors are
required. Like the antenna, all analytical components are integrated
compactly into the receiver unit.



Interested visitors will have the chance to experience the advantages of
Johnson Controls’ new self-initializing tire pressure monitoring system at
the 2009 IAA (International Motor Show) in Frankfurt. The technology is
available for all vehicle segments.



A more technically detailed version of the press release is available upon request.

Further information is available from:


Johnson Controls GmbH
Automotive Experience
Industriestr. 20–30
51399 Burscheid
Germany


Astrid Schafmeister
Tel.: +49 2174 65-3189
Fax: +49 2174 65-3219
E-mail: astrid.schafmeister@jci.com



Johnson Controls (NYSE: JCI) is the global leader that brings ingenuity to the
places where people live, work and travel. By integrating technologies, products
and services, we create smart environments that redefine the relationships
between people and their surroundings. Our team of 140,000 employees creates a
more comfortable, safe and sustainable world through our products and services
for more than 200 million vehicles, 12 million homes and one million commercial
buildings. Our commitment to sustainability drives our environmental stewardship,
good corporate citizenship in our workplaces and communities, and the products
and services we provide to customers. For additional information, please visit
http://www.johnsoncontrols.com.

				
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