Optimization of Dual Loop EGR of a V6 3.0 Liter Diesel Engine for CO2 Reduction 2013-01-0316
As the markets require a more environmentally friendly and high
fuel consumption vehicle, we have to satisfy bilateral target.
Though many new after-treatment techniques like LNT, SCR are
investigated to meet both strong emission regulations and low fuel
consumption, high cost of these techniques should be solved to
This paper describes how to optimize the dual loop EGR as a tool
to reduce CO₂ emission of a HSDI diesel engine in the passenger car
application. Focus is not only on the optimization to obtain the
maximum CO₂ reduction but also on how to assess and overcome
various side effects.
As a result of careful optimization, as much as 6% CO₂ reduction
was achieved by introduction of low pressure EGR loop, maintaining
the same boundary conditions as those with high pressure EGR loop
only. Not only the dual EGR system but also further improvement was
applied such as combustion improvement, friction reduction and many
others to achieve as much as 20% total CO₂ reduction.
The dual loop EGR was proven to be an effective solution to
reduce CO₂ and therefore it is considered to be one of the core
technologies in the passenger diesel applications of Hyundai-Kia
Motors to meet the future CO₂ regulation.