Cylinder deactivation allows a vehicle to go further on a tank of gas
without compromising performance
TROY, Mich., May 8 /PRNewswire/ -- With fuel prices across the nation
exceeding $3 per gallon and continuing to rise, Delphi Corp. has introduced
a technology that will help reduce refueling costs by increasing
efficiency.
(Logo: http://www.newscom.com/cgi-bin/prnh/20020315/DEF002LOGO )
Delphi's cylinder deactivation valve-train technology can improve
vehicle fuel economy by up to 8 percent based on federal testing
procedures. This allows drivers to extend the distance a vehicle will
travel on a tank of gas, which ultimately helps cut consumers' fueling
costs.
"Fuel costs are increasing today and will most likely remain high,"
said Guy Hachey, president, Delphi Powertrain Systems. "Consumers are eager
for better fuel efficiency, and cylinder deactivation is an immediate and
cost- effective solution that allows customers to save at the pump right
now."
Cylinder deactivation is an advanced valve-train technology that de-
activates up to half of the engine's cylinders under certain driving
conditions. For example, with an eight-cylinder gasoline engine, up to four
of the cylinders cease to operate when there is a light load on the engine
-- such as cruising on the highway. The system precisely closes the intake
and exhaust valves on the targeted cylinders using electronically
controlled hydraulic actuation, while disabling fuel and spark to those
cylinders. Fuel economy is improved because the firing cylinders operate at
higher load, reducing the pumping losses of the overall engine. When the
driver needs full power, the system then re-activates all the engine
cylinders.
Furthermore, drivers no longer have to sacrifice performance for fuel
economy. Because cylinder deactivation is engaged only under light engine
demand, drivers have full cylinder use during any situation when they may
need it, such as in towing, pulling into traffic or accelerating. Unlike
some other fuel-savings technologies, cylinder deactivation allows engine
power to be readily available.
"Cylinder deactivation really is a win-win solution for consumers,"
said Hachey. "Drivers can cut fuel costs without cutting performance when
they need it. Additional fuel savings can be achieved by pairing the
technology with other Delphi products, such as adaptive cruise control,
electric power steering or cam phasing."
For the 2006 model year, cylinder deactivation is available on the
Pontiac Grand Prix, Chevrolet Monte Carlo and Chevrolet Impala passenger
cars. Additionally, it is standard equipment on the 5.3L V-8 GMC Envoy XL
and Chevrolet Trailblazer EXT and optional on other engines.
For more information about Delphi (Pink Sheets: DPHIQ), visit
http://www.delphi.com/media .
SOURCE Delphi Corporation
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Related links:
http://www.delphi.com/media
Photo Notes:
NewsCom: http://www.newscom.com/cgi-bin/prnh/20020315/DEF002LOGO
PRN Photo Desk photodesk@prnewswire.com
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CONTACT:
Andrea Knapp of Delphi Corp.,
+1-248-813-2985, andrea.knapp@delphi.com
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