A New Approach to Boost Pressure and EGR Rate Control Development for HD Truck Engines with VGT

Analyses of Mechanism on Roadside Pollution by On-Board Emissions Measurement System (Transient Characteristics of NOx emissions in Vehicles with EGR System in Real Traffic Conditions)

“…a. Engine torque for every 0.5 second is calculated by an equation of vehicle running resistance (9) . The running resistance is calculated for a gradient of zero.…”

“…One of the causes was low speed of the vehicle and heavier engine load, but it was also pointed out that the differences of NOx emission characteristics between transient driving and steady-state driving could influence the factor (8) . In the past studies, many efforts were made in order to optimize an EGR system for turbo-charged engines, focusing mainly on the improvement of transient air-fuel ratio, resulting in the reduction of smoke and NOx during acceleration (9)- (12) . This paper describes NOx emissions characteristics of transient and steady-state driving, and clarifies the impacts of those characteristics on NOx pollution at local roadsides.…”

Quantitative feedback design of air and boost pressure control system for turbocharged diesel engines

“…In the past, different approaches are applied to this air charging control problem, for example, (Ammann, Fekete, Guzzella, & Glatfelder, 2003;Jankovic & Kolmanovsky, 2000;Larsen & Kokotovic, 1998;Pfeifer et al, 2002;Stefanopoulou, Kolmanovsky, & Freudenburg, 2000;Utkin, Chang, Kolmanovsky, & Cook, 2000;Wei & Del Re, 2006, 2007. Included those are sliding mode control (Utkin et al, 2000;Wang, 2008a); passivation control design (Larsen & Kokotovic, 1998); and constructive Lyapunov control design (Jankovic & Kolmanovsky, 2000).…”

Model-based quantitative feedback control of EGR rate and boost pressure for turbocharged diesel engines

“…This MIMO control problem is very challenging since both control loops are coupled ( [7], [8]). Furthermore, this MIMO plant is nonlinear, and designing such a complicated system requires extensive calibration work.…”

“…In the past, different approaches ( [5], [7], [8], [11], [12], [13], [14]) were applied to this diesel air charging control problem. Those included sliding mode control [13], passivation control design [11], and constructive Lyapunov control design [14].…”