System Properties and Control of Turbocharged Diesel Engines with High- and Low-Pressure EGR

Abstract

-System Properties and Control of Turbocharged Diesel Engines with High-and LowPressure EGR -An extension of the air-and exhaust-system with a low-pressure EGR has the potential to significantly reduce the NO x emissions. Besides a cooled high-pressure EGR and the turbocharger with variable geometry turbine, the low-pressure EGR introduces an additional degree of freedom to

Pressure and flow based control of a turbocharged diesel engine air-path system equipped with dual-loop EGR and VGT

“…Recently, dual-loop EGR systems, using high pressure (H P) EGR and low pressure (LP) EGR systems simultaneously, are applicable for the effective utilization of EGR functions. Mostly, HP EGR has a function to increase temperature in intake manifold of diesel engines, and LP EGR recirculates clean EGR gas which came Sooyoung Kim (westkllr@kaist.ac.kr), Hyomin Jin (enfinirx7@ kaist.a � .kr), Seibum B. Choi (sbchoi@kaisLac.kr) are with the Korea Advanced InstItute of Science and Technology (KAIST), Daejeon, Republic of Korea through after-treatment systems and the cooler to offer high mass flow rate [8]- [12] [14].…”

“…The well-known coupling effect between HP EGR system and VGT, both of which are driven by exhaust gas, is investigated in [6], and recently, static couplings of the dual-loop EGR syst � m are dealt with in [8]. To handle control problems of the au-path system effectively, various coordinated control methods of VGT and EGR systems based on mathematical models have been investigated.…”