DENSO Develops Exhaust Gas Temperature Sensor With Improved Temperature Detection...

DENSO Develops Exhaust Gas Temperature Sensor With Improved Temperature
Detection Accuracy

- Contributes to cleaner emissions and better fuel efficiency -

SOUTHFIELD, Mich., April 20 /PRNewswire/ -- DENSO Corporation has improved the
temperature detection accuracy of its newly developed diesel exhaust
temperature sensor. The new sensor, which is located in front of the diesel
particulate filter (DPF) and used to control temperature for DPF
regeneration*, helps reduce harmful diesel emissions and improves fuel
efficiency. The product will be installed on heavy duty and medium duty
diesel vehicles sold in the U.S. in fall of 2009. It will also be installed
to vehicles sold in Japan and Europe in 2010.

"DENSO's improved Exhaust Gas Temperature Sensor is a result of the company's
continuous efforts to develop products that enable our customers to reduce
emissions and improve fuel economy of diesel systems," said Doug Patton,
senior vice president of Engineering at DENSO International America. "The
accuracy improvement, due to the extended probe length, will allow customers
to more precisely control their diesel aftertreatment systems, helping improve
the emissions and fuel economy."

To improve the sensor's temperature accuracy, DENSO increased the probe length
to almost twice that of the conventional product and extended the sensing tip
into the exhaust pipe. The company achieved this by developing a
vibration-resistant structure with an anti-resonance pipe to support the
probe, or sheath pin, at its optimal position. Also, while the temperature of
DPF regeneration needs to be controlled under 650 degrees Celsius for the DPF
to maintain its capability, the sensor is equipped with a newly developed
thermistor, or sensing element, which improves detection accuracy to plus or
minus 10 degrees Celsius compared to that of the conventional product of plus
or minus 30 degrees Celsius. These two developments improved the sensor's
temperature detection accuracy of the most intensely heated part of the DPF,
its core.

With the improved temperature detection performance, the new sensor helps
regenerate DPFs more efficiently, resulting in cleaner emissions, as well as
increased fuel efficiency due to less fuel required in the DPF regeneration
process. In addition, because less fuel is needed for DPF regeneration, less
fuel is mixed in the engine oil, which helps prevent the engine oil from
deteriorating.

"With more stringent emissions regulations and increasing environmental
awareness, DENSO expects an increase in requirements to improve diesel exhaust
aftertreatment technologies, which also will increase the demand for highly
precise and extended exhaust gas temperature sensors," said Masahiko Miyaki,
managing officer responsible for DENSO's Powertrain Control Systems Business
Group.

In addition, DENSO also expects an increase in gasoline-powered vehicles with
turbochargers to meet the demand for higher engine power as downsizing
progresses. To help control the turbocharging system's temperature more
precisely, the company plans to apply the new vibration-resistant technology
to a gasoline exhaust temperature sensor that can withstand heavy vibrations
when mounted near the turbocharger.

DENSO Corporation, headquartered in Kariya, Aichi prefecture, Japan, is a
leading global supplier of advanced technology, systems and components. Its
customers include all the world's major carmakers. Worldwide, the company
employs approximately 119,000 people in 32 countries and regions, including
Japan. Consolidated global sales for the fiscal year ended March 31, 2008
totaled US$40.2 billion. DENSO common stock is traded on the Tokyo, Osaka and
Nagoya stock exchanges. For more information, go to www.globaldenso.com, or
visit our media website at www.densomediacenter.com.

In the Americas, DENSO employs more than 17,000 people with consolidated sales
totaling US$8.3 billion for the fiscal year ended March 31, 2008.

(Notes)
U.S. dollar amounts have been translated, for convenience only, at the rate of
106.42 yen = US$1, the approximate exchange rate prevailing in the Tokyo
Foreign Exchange Market on June 30, 2008. Billion is used in the American
sense of one thousand million.

* The process of recovering the DPF's filtering capability by burning the
particulate matter (PM) trapped in the device through catalytic reaction.

SOURCE DENSO Corporation

Bridgette LaRose of DENSO International America, +1-248-372-8266, Cell,
+1-586-703-3322, bridgette_larose@denso-diam.com, or Julie Kerr of DENSO
International America, +1-248-372-8260, julie_kerr@denso-diam.com