Environmental Preservation Tokyo Motor Show 2002

Isuzu's next generation technologies will soon contribute to 
environmental preservation

Isuzu has been devotedly developing light-duty trucks incorporating a hybrid system utilizing a reliable diesel engine as well as vehicles fueled by DME (dimethyl ether), a substitute for diesel oil. Significant progress has also been made in CNG and LPG vehicles, which are optimal for short-distance transportation. Moreover, post-combustion treatment technology is improving rapidly as part of Isuzu's efforts to put its clean diesel expertise to practical use.

ELF CNG
Clean, powerful and quiet, the ELF CNG light-duty truck is equipped with an electromagnet retarder. Engine braking force is equivalent to that of diesel vehicles, and reduces driver's fatigue. As a specialist in short-distance transport, the ELF CNG holds the largest share* in the CNG truck segment. and is widely used for urban deliveries.

*72% share of CNG vehicle segment in 2001 (domestic registration of ELF-class cabover type, internal data)
ELF CNG
[Specifications]
Dimensions (mm): Length 4955 x Width 1890 x Height 2950 (chassis)
4HF1-CNG truck

4HF1-CNG engine 4HF1-CNG engine
[Features]
4-cylinder OHC, non-contact electronic ignition control system
[Specifications]
4334cc 88kW (120PS)

ELF HEV (hybrid electric vehicle) (Reference exhibition)
Isuzu's parallel hybrid system relies on either the diesel engine or electric motor depending on driving circumstances and power demands. By adopting one motor and two clutches, which is the best combination for commercial vehicles, the ELF HEV can use only the electric motor for quiet operation in residential areas. The diesel hybrid system enables this vehicle running without pollution and noise.
ELF HEV (hybrid electric vehicle) (Reference exhibition)

DME (dimethyl ether) engine DME (dimethyl ether) engine (Reference exhibition)
A low-emission, next-generation engine utilizing dimethyl ether, the DME engine is getting wide recognition as an alternative-fuel powerplant. Based on the 6HH1 diesel, this engine emits no black smoke and very little PM and NOx.
ELF HEV (hybrid electric vehicle) (Reference exhibition)

Next Generation Post-Combustion Teatment Technology
Continuously Regenerating diesel particulate Filter
The continuously regenerating type DPF (Diesel Particulate Filter) is a system that converts the nitrogen monoxide (NO) in the exhaust gas into nitrogen dioxide(NO2), which can then be well oxidized in an oxidizing catalytic converter, and burns the PM trapped on the filter. This system doesn't require an energy source to support PM burn. For practical use, the sulfur contained in the fuel must be significantly reduced.
Source:Johnson Matthey
Continuously Regenerating diesel particulate Filter

NOx Catalyst NOx Catalyst
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 type NOx catalysts that use diesel fuel. 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 use, however, we need to find effective ways of reducing the high oxygen concentration of the exhaust gas and the sulfur component
of the diesel fuel.

Continuously Regenerating diesel particulate Filter+
Urea-Selective Catalytic Reduction System Continuously Regenerating diesel particulate Filter+ Urea-Selective Catalytic Reduction System
By combining the performance of a continuously regenerating DPF with the high purification rate of a NOx catalyst using urea as agent, this after-treatment technology is on the cutting edge of environmental technologies. The DPF drastically reduces PM, while NOx is effectively removed through chemical reaction with ammonia, which is contained in the urea solution the system injects into exhaust emissions.