SubaruImpreza WRX, Legacy, Forrester
Mitsubishi
4D30, 4D31, 4D34T, 4M50, 6D14T, 6D15T, 6D16T, 6D22T, 6D24T, 6D31, 6D34, 6D70, 6M60, 6M61, 6M70, 8DC9T, 8DC11, 8M22, 4M40, 4D56, 4G63, 4G93, Pajero, Shogun, delica, Challenger, Evolution, Gallant, MS110, MS180, MS240
Hino
EP1, EP2, EP100, EF750, EF100, EF700,
EH700, H06C, H07C, JO5C, JO7C, JO8C,
K11C, K13C, K13D,
K11C, P11C, F17D, S05D
Isuzu
4BG1T, 4HE1T, 6BD1T,
6BG1T, 6DE1T, 6HK1T, 6RB1T, 6SA1T, 6WA1T, 6WF1T, 6WG1T, 6SD1T, 4JB1T, 4JG2T, C223, 4JX1TC,
4JA1T, 4EE2
Hitachi
Ex120, UH083, Ex200,
Ex210, Ex225, Ex220, Ex230, Ex270, Ex280, Ex300, Ex350, Ex370, Ex400, Ex450, Ex550,
Zaxis200/230/
270/330/450
Komatsu
PC100, PC120, PC150,
PC200, PC220, PC270, PC300-3, OC300, PC400, PCWA100, WA150, WA180, WA250, WA300, WA400,
WA450, WA700, HD465
Nissan Diesel
PE6T, NE6T, PF6T, PD6T,
FE6T, RD6T, GE13, MD92, FD46TA
Kobelco
SK045, SK120, SK907,
SK07, SK12, SK16, SK120, SK210, SK220, SK230, SK250, SK290, SK300, SK320, SK330, SK430,
SK480
Kato
HS120, HS160, HD450,
HD550, HD700, HD820, HD823, HD1023, HD1250
Cat
E110, E120, E200, E320B,
E320C, E450
Sumitomo
S260/S265, S340, S580,
SL2800, LS2600, LS2650, LS2800, LS3400, LS4300, SH100, SH120, SH200, SH220, SH300, SH400
NIssan
Silvia, 200SX, 300SX,
Skyline R34
Engine Trends
DPNR - Clean Air Realization
Combusation omprovement and oxidation catalyst application has been carried our for reducing exhaust gas emission from diesel engines. Toyota has developed a revolutionary Diesel Aftertreatment System called DPNR, Diesel Particulate-NOx Reduction System, which enables to reduce PM (Particulate Matter) and NOx (Nitrogen Oxide) simultaneously for further reduction of them.
Basic catalyst configuration of DPNR is a porous
ceramic substrate and the surface is coated with Nox storage reduction catalyst which is
developed for diesel engines based upon aftertreatment technology originally for lean burn
gasoline engines. This engine also incorporates Common-Rail fuel injection system to
control injection timing and amount of injection fuel quite precisely. This system is able
to reduce both PM and NOx by approximately 80% as an initial performance, compared to the
permitted level of exhaust emissions from a 2-ton truck under 1998 Japanese regulation
limits.*
*In comparision with 2-ton diesel trucks conforming to 1998 regulations. The performance of the DPNR system may be diminished by the presence of sulfur, therefore fuels with minimum sulfur content should be used.
The basic structure of the DPNR catalyst
DPNR features a newly developed ceramic substrate.
It is highly porous and is coated with NOx storage reduction catalyst.
Exhaust gas is purified by means of
chemical reaction such as oxidation or reduction in the catalyst while passing through a
gap between substrates.
The flow of exhaust gas in the switching DPNR
In order to make the DPNR compact while retaining efficiency and long-term durability against emissions, the
switching DPNR has also been developed. The exhaust gas flow reverses by switching a valve
located at the upstream of the catalyst periodically to enhance utility efficiency of the
catalyst and realize quick reaction of PM oxidization.
Mechanisms for the purification of PM and NOx
During lean conbustion with plenty of oxygen, PM is once captured by porous ceramic substrates. At the same time it is oxidized by active oxygen released in the NOx storage process and by oxygen in the exhaust gas.
NOx is once stored into the catalyst during lean combustion. Afterwards it is reduced by momentary rich combustion with small amount of oxygen. In addtion during rich combustion, PM is oxidized by the active oxygen released while storage NOx is reduced.
