Technology for Cleaner Diesel

Other Technologies for Cleaner Diesel

Oxidizing Catalytic Converter
Oxidizing Catalytic Converter
This catalytic converter oxidizes PM and HC from the engine exhaust by chemically converting them into harmless substances such as CO2 and water. The exhaust gas passes through a high-purification-ratio catalyst comprising precious metals such as white gold, which is installed midway along the exhaust system, and the PM and HC is significantly reduced.
Isuzu's oxidizing catalytic converter effectively removes SOF (Soluble Organic Fractions) particles such as unburned fuel in PM and HC. However, the converter does not remove the soot or carbon particles in PM.

NOx Catalyst (Under Development)
This is a catalytic device designed to convert NOx generated by the diesel engine into harmless nitrogen, water and CO2. Isuzu is currently researching deoxidizing (reduction) type NOx catalysts that employ diesel oil or urea as reduction agents. The type using diesel as the reduction agent realizes even more efficient NOx purification by utilizing a high-density carrier, which radically reforms the contact surface between the exhaust gas and the reduction agent. Before this catalyst can be employed for practical applications, however, we need to find effective ways of reducing the high oxygen concentration of the exhaust gas and the sulfur component of the diesel oil.

NOx Catalyst using a diesel as an agent NOx Catalyst
Continuous Regeneration DPF (Under Development)
Continuous Regeneration Type DPF Example
The continuous regeneration type DPF (Diesel Particulate Filter) is a system that coverts the nitrogen monoxide (NO) in the exhaust gas into nitrogen dioxide (NO2), which can then be well oxidized in a catalytic converter, and burns the PM trapped on the filter. This system doesn' t require an energy source to support PM burning. For practical use, the sulfur contained in the fuel must be significantly reduced.