Diesel engine variable-geometry turbine turbocharger controlled by a multi-agent-based algorithm

Mastrovito, M.; Gaballo, L; D’Ambrosio, Lorenzo

doi:10.1243/09544070jauto493

Cited by 10 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The operation of a variable geometry turbocharger (VGT) is a function of the engine speed and load with the developments in recent years focusing on emission reduction strategies. 1–4 Thus, at fixed engine speed and load, the optimal turbine inlet geometry is fixed. However, in an internal combustion engine, the pulsating nature of the exhaust flow means that the flow conditions at the turbine inlet are changing continuously regardless of the engine speed and load.…”

Section: Introductionmentioning

confidence: 99%

Novel method to improve engine exhaust energy extraction with active control turbocharger

Rajoo

Pesiridis

Martinez-Botas

2013

International Journal of Engine Research

View full text Add to dashboard Cite

A mixed-flow turbine with pivoting nozzle vanes was designed and tested to actively adapt to the pulsating exhaust flow (called the active control turbocharger). The turbine was tested at an equivalent speed of 48,000 r/min with inlet flow pulsation of 40 and 60 Hz, which corresponds to a four-stroke diesel engine speed of 1600 and 2400 r/min, respectively. The nozzle vane operating schedules for each pulse period are evaluated experimentally in two general modes: natural opening and closing of the vanes due to the pulsating flow and the forced sinusoidal oscillation of the vanes to match the incoming pulsating flow. The turbine energy extraction as well as efficiency is compared for the two modes to formulate its effectiveness. In addition, a one-dimensional commercial code was implemented, matching an active control turbocharger to an engine with equivalent characteristics to the one simulated in the laboratory. The results obtained represented an improvement over the experimental data with the engine power increasing by between 3.58% and 7.76% between 800 and 1400 r/min; the actual turbocharger power recovery required to achieve this increase in engine power was far higher and typically exceeded 20% throughout the lower half of the engine speed range while remaining higher than 10% for most of the rest. The aim of this article is to demonstrate the potential of active control turbocharger in relation to current turbocharging practice. It has shown strong potentials to improve engine performance in parts of the operational envelope, which need to be further harnessed for real-life applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Novel method to improve engine exhaust energy extraction with active control turbocharger

Rajoo

Pesiridis

Martinez-Botas

2013

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…In comparison to the current PID embedded strategy developed by BOSCH, a significant improvement in desired set-points tracking was obtained. Mastrovito et al (22) used a multi-agent system (MAS) approach to manage the boost control process of a modern turbocharged diesel engine. The MAS controller performed better than the traditional PID controller in terms of promptness but also showed a good level of adaptivity, precision, robustness and stability.…”

Section: Figszipmentioning

confidence: 99%

A novel fuzzy logic variable geometry turbocharger and exhaust gas recirculation control scheme for optimizing the performance and emissions of a diesel engine

Cheng

Dimitriou

Wang

et al. 2018

International Journal of Engine Research

View full text Add to dashboard Cite

Variable geometry turbocharger and exhaust gas recirculation valves are widely installed on diesel engines to allow optimized control of intake air mass flow and exhaust gas recirculation ratio. The positions of variable geometry turbocharger vanes and exhaust gas recirculation valve are predominantly regulated by dual-loop proportional–integral–derivative controllers to achieve predefined set-points of intake air pressure and exhaust gas recirculation mass flow. The set-points are determined by extensive mapping of the intake air pressure and exhaust gas recirculation mass flow against various engine speeds and loads concerning engine performance and emissions. However, due to the inherent nonlinearities of diesel engines and the strong interferences between variable geometry turbocharger and exhaust gas recirculation, an extensive map of gains for the P, I, and D terms of the proportional–integral–derivative controllers is required to achieve desired control performance. The present simulation study proposes a novel fuzzy logic control scheme to determine appropriate positions of variable geometry turbocharger vanes and exhaust gas recirculation valve in real-time. Once determined, the actual positions of the vanes and valve are regulated by two local proportional–integral–derivative controllers. The fuzzy logic control rules are derived based on an understanding of the interactions among the variable geometry turbocharger, exhaust gas recirculation, and diesel engine. The results obtained from an experimentally validated one-dimensional transient diesel engine model showed that the proposed fuzzy logic control scheme is capable of efficiently optimizing variable geometry turbocharger and exhaust gas recirculation positions under transient engine operating conditions in real-time. Compared to the baseline proportional–integral–derivative controllers approach, both engine’s efficiency and total turbo efficiency have been improved by the proposed fuzzy logic control scheme while NOx and soot emissions have been significantly reduced by 34% and 82%, respectively.

show abstract

“…4 Over the past few years, VGT control methods and strategies have undergone rapid development. Mastrovito et al 6 proposed an innovative technique for VGT control based on a multi-agent system, using a fuzzy logic system to represent the agents' internal structure. It indicated that this control technique takes into account the nonlinearity of the system.…”

Section: Introductionmentioning

confidence: 99%

A novel variable geometry turbine achieved by elastically restrained nozzle guide vanes

Wang

Huang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

Variable geometry turbocharging is one of the most significant matching methods between turbocharger and engine, and has been proven to provide air boost for entire engine speed range as well as to reduce turbo-lag. An elastically constrained device designed for a novel variable geometry turbocharger was presented in this paper. The design of the device is based on the nozzle vane’s self-adaptation under interactions of the elastic force by elastically restrained guide vane and the aerodynamic force from flowing gas. The vane rotation mechanism of the novel variable geometry turbocharger is different from regular commercial variable geometry turbocharger systems, which is achieved by an active control system (e.g. actuator). To predict the aerodynamic performance of the novel variable geometry turbocharger, the flow field of the turbine was simulated using transient computational fluid dynamics software combined with a fluid–structure interaction method. The results show that the function of elastically constrained device has similar effectiveness as the traditional variable geometry turbocharger. In addition, the efficiency of the novel variable geometry turbocharger is improved at most operating conditions. Furthermore, a turbocharged diesel engine was created using the AVL BOOST software to evaluate the benefits of the new variable geometry turbocharger. The proposed novel variable geometry turbocharger can effectively improve the engine performance at mid-high speeds, such that the maximum decrease of brake-specific fuel consumption reaches 17.91% under 100% load and 3600 r/min engine condition. However, the engine power and brake-specific fuel consumption decrease significantly at low engine speed conditions, and the decrease is more than 26% under 1000 r/min.

show abstract

Diesel engine variable-geometry turbine turbocharger controlled by a multi-agent-based algorithm

Cited by 10 publications

References 10 publications

Novel method to improve engine exhaust energy extraction with active control turbocharger

Novel method to improve engine exhaust energy extraction with active control turbocharger

A novel fuzzy logic variable geometry turbocharger and exhaust gas recirculation control scheme for optimizing the performance and emissions of a diesel engine

A novel variable geometry turbine achieved by elastically restrained nozzle guide vanes

Contact Info

Product

Resources

About