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With free Acrobat Reader software, you can view Adobe PDF files. |
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| You need Photoshop or QuickTime to
download and view photos in TIFF format. |
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| Diesel particulate filter (DPF) is disposed in an
exhaust gas pipe to trap particulate matter (PM) in exhaust gas from
diesel powered engines, and burn the PM through a reaction with catalyst
on the DPF, thereby reducing the amount of PM. DPF is indispensable
to clear emission regulations that will be severe worldwide. |
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| DENSO developed DPF having the following features. |
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High Filtration Efficiency: |
| DENSO’s DPF is formed in
a cylindrical honeycomb form that has several thousands of cell
passages partitioned by walls. Each cell passage has a one-millimeter-square
cell opening at one end and is closed at the other end so that
the cell passages are alternately closed at each end. This structure
facilitates to trap PM. Further, the walls of the DPF have an
infinite number of very fine pores with improved uniformity
and high porosity of 60 percent, which heightens filtration
efficiency to more than 90 percent while reducing gas-flow resistance
not to affect the engine performance. The trapped PM is burned
through a catalytic reaction using exhaust gas heat at 400 degrees
centigrade or more. |
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High Durability: |
| DENSO’s DPF is made of cordierite
ceramic having small thermal expansion coefficient and high
thermal shock resistance, realizing high durability. |
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| In 2002, DENSO developed a new filter for a Toyota
Diesel Particulate-NOx Reduction system (DPNR) in cooperation with
Toyota Motor Corporation and Cataler Corporation (catalyst manufacturer).
Toyota’s diesel vehicle, equipped with DENSO’s filter, began
public road tests in March 2002 in Europe for market monitoring purposes. |
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| For gasoline powered vehicles,
DENSO is the first in the world to develop a hexagonal cell
ceramic honeycomb having hexagonal cell holes instead of conventional
square cell holes, as well as a thin-wall type ceramic honeycomb
having a wall thickness of 50 µm that is about a third
of the conventional one. These ceramic honeycombs were commercialized
in 1998 and 2000. |
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[Contact]
Shinya Omi, Yoko Suga, Miwa Kurokawa, Jennifer Knoll
Corporate Communications Department of DENSO Corporation,
+81-566-25-5594/5592
shinya_omi@denso.co.jp,
yoko_suga@denso.co.jp,
miwa_kurokawa@denso.co.jp,
jennifer_knoll@denso.co.jp
http://www.globaldenso.com |
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