Sensata's CPOS seen by Daimler as aid to lowering emissions in new engine
ALMELO, Netherlands, May 3, 2013
ALMELO, Netherlands, May 3, 2013 /PRNewswire/ --A new version of Sensata's
award-winning Cylinder Pressure Sensor (CPS) is attracting attention as a
critical component to lowering exhaust emissions and increasing fuel
efficiency in next-generation engine combustion systems.
Development partners Sensata and Beru released their first generation CPS in
series production in 2007 which made it possible to directly measure the
combustion process in a diesel engine by incorporating a sensor into the glow
plug. The device enabled diesel automakers to eliminate up to 90 percent of
harmful pollutants and boost fuel economy, helping to meet Europe's strict
emission standards. This earned Sensata the 2006 Overijssel and the 2007 Dutch
ATC Innovation Awards and the 2008 EUREKA Lillehammer Award .
The newer, miniaturized CPS, called Cylinder Pressure Only Sensor (CPOS) , can
be installed separately from the existing glow plug, enabling OEMs to opt for
more durable ceramic diesel glow plugs.It also enables use in gasoline
Tim Tiek, marketing manager of Sensata's global Combustion Sensors business,
said, "Our new design builds on existing CPS technology that has proven to be
durable as well as extremely accurate and stable with several million CPS
already in the field. Sensata's CPOS sensor builds on this experience,
allowing customers to utilize next-generation, closed-loop combustion systems.
Sensata's application knowledge and close customer cooperation enabled us to
optimize the CPOS design to maximize emission reduction, deliver the best
possible fuel economy and help our customers save on overall system cost."
Daimler is the first company in the world to launch high volume production
with the innovative CPOS for the majority of their diesel engines. In a
presentation at the 10th International Symposium on Combustion Diagnostics in
May 2012, Ruediger Pfaff, Manager of Diesel Combustion Technology Development
for Daimler, described the benefits of combustion pressure sensors in a
presentation on development work Daimler is doing to lower emissions and fuel
consumption of diesel engines by using closed-loop combustion control.
Mr. Pfaff stated, that, after extensive testing, which started with the
installation space and manufacturing investigations of the cylinder head and
culminated in numerous sensor and endurance tests, Daimler favored Sensata's
stand-alone solution. Estimates are that use of combustion pressure sensors
can reduce fuel consumption by 2 percent, reduce nitrogen oxide raw emissions
by up to 30 percent and compensate for fuel quality differences.
The ability to incorporate future pressure sensor and glow plug innovations in
a standardized manner independently of each other in the different engine type
numbers or country variants was also seen as a major advantage.
Sensata Engineering Manager Marc Borgers said, "During the early development
work with Daimler, we focused on delivering a robust solution able to
withstand high temperatures and heavy soot conditions. The capabilities of
CPOS have been proven by extensive validation tests and many field tests. Its
proven accuracy (< + 2%) over its lifetime bodes well for future functions
such as power boosting and improved engine diagnostics and could help
alleviate the cost of complex and expensive exhaust after-treatment
About Sensata Technologies
Sensata Technologies is one of the world's leading suppliers of sensing,
electrical protection, control and power management solutions with operations
and business centers in eleven countries. Sensata's products improve safety,
efficiency and comfort for millions of people every day in automotive,
appliance, aircraft, industrial, military, heavy vehicle, heating,
air-conditioning and ventilation, data, telecommunications, recreational
vehicle and marine applications. For more information, please visit Sensata's
website at www.sensata.com .
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