Diesel Technology

Next-generation diesels that defy the common wisdom.

Isuzu, a top-tier manufacturer of diesel engines.
Continuing to take up the challenges of ultimate environmental and economic performance to protect the planet and benefit the peoples of the world.

D-CORE series, next-generation diesel engines taking truck efficiency to the next level.
The diesel engine has the advantage of exceptional fuel efficiency and lower CO2 emissions. Accordingly, diesel is expected to play a role in the prevention of global warming. Considering the seriousness of global warming and limited fossil fuels, the biggest issue today is realizing both environmental and economic performance. To achieve this, Isuzu focused on lowering emissions and increasing efficiency through small displacement and turbocharging engines. We have succeeded in fundamentally raising expectations of engine performance in terms of fuel economy and weight by increasing output and torque per unit of emissions and making engines as light and compact as possible. The result is the D-CORE engine series, which not only meets 2005 emission regulations but 2015 fuel economy standards as well.
D-CORE represents a next-generation highly-efficient diesel engine series in which Isuzu original concept, technology and performance are integrated to become a core of the diesel engine in the year to come.

Pursuing environmental performance with original clean technology.
The key to the clean technology of D-CORE engines is the simultaneous realization of combustion optimization technology, after-treatment of exhaust gas and electronic control technologies. By integrating these three technologies, Isuzu is lowering exhaust and CO2 emissions, cutting fuel costs and realizing high power. In particular, the technology for electronic control of hardware can vary greatly according to manufacturer, and Isuzu has the strength of developing its own electronic control software in house to maximize hardware capabilities. Furthermore, as one of only a few manufacturers which develop diesels ranging from small engines for passenger vehicles to large powerplants for heavy-duty trucks, Isuzu can immediately incorporate new software across its engine lineup.

World leader in research of super-clean diesels.
One of the technologies critical to development of super-clean diesels-the next generation of diesel engines offering the ultimate in emission reduction and fuel economy-is homogeneous premix combustion, which relies on precise control of the electronic common rail fuel-injection system. Japanese diesel engine manufacturers are leading the industry in this extremely complex technology, which drastically cuts particulate matter and NOx in diesel emissions. Among Japanese makers, Isuzu is taking the lead in this field.

4JJ1-TCS Diesel for Light-duty Trucks

4HK1 Diesel for Medium-duty Trucks

6UZ1 Engine for Heavy-duty Trucks

Combustion Optimization Technology
Common rail ultra high-pressure fuel-injection system
Improves combustion efficiency by ultra high-pressure fuel injection.
Large-volume cooled EGR
Lowers NOx without reducing fuel efficiency.
Variable Geometry Turbocharger System (VGS)
Excellent torque at low rpm.
DOHC16 valves
Improves fuel efficiency by increasing air intake and discharge efficiency.