Computationally Efficient Whole-Engine Model of a Cummins 2007 Turbocharged Diesel Engine

Kulkarni, Anup M.; Shaver, Gregory M.; Popuri, Sriram; Frazier, Tim R.; Stanton, Donald W.

doi:10.1115/1.3125316

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…In addition, the model was also validated with data from a second engine of similar build at Purdue University's Herrick Laboratories [26]. The results showed good agreement with respect to air flow, EGR fraction, temperatures, and pressures.…”

Section: Basic Model Descriptionmentioning

confidence: 93%

“…Models like this provide an opportunity to develop and analyse engine designs and combustion strategies which would otherwise require significant experimentation. The model used here is an accurate, flexible, and computationally efficient engine model developed and calibrated for the Cummins ISB engine at Purdue [25,26]. In prior work the model was validated against 22 different operating points using engine data from Cummins.…”

Section: Basic Model Descriptionmentioning

confidence: 99%

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Effect of intake valve closure modulation on effective compression ratio and gas exchange in turbocharged multi-cylinder engines utilizing EGR

Modiyani

Kocher²,

Alstine³

et al. 2011

International Journal of Engine Research

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Advanced combustion strategies including premixed charge compression ignition, homogeneous charge compression ignition, and lifted flame combustion are promising approaches for meeting increasingly stringent emissions regulations and improving fuel efficiency in next generation powertrains. Variable valve actuation and closed-loop control promise to play a key role in the promotion and control of these advanced combustion modes. For example, modulation of intake valve closure timing dictates the effective compression ratio and influences the total amount of charge trapped inside the cylinder, and in so doing allows manipulation of the in-cylinder reactant concentrations and temperature prior to and during the combustion process. The effort described here uses data from, and an experimentallyvalidated simulation model for, a multi-cylinder engine with variable geometry turbocharging, cooled exhaust gas recirculation, and fully flexible variable valve actuation. This effort's intent is to determine the control authority over the gas exchange process and effective compression ratio when intake valve closure timing modulation is included on a modern turbocharged diesel engine, as well as to lay the groundwork for closed-loop control design for the promotion and control of advanced combustion modes. The engine testbed at Purdue provides a unique opportunity to pursue these objectives for turbocharged engines with exhaust gas recirculation, as it is the only such engine system in academia outfitted with multi-cylinder fully-flexible valve actuation. A method to estimate in-cylinder temperature at top dead centre is also described. Candidate control architectures for both steady state and transient operation are introduced.

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Section: Basic Model Descriptionmentioning

confidence: 93%

Section: Basic Model Descriptionmentioning

confidence: 99%

Effect of intake valve closure modulation on effective compression ratio and gas exchange in turbocharged multi-cylinder engines utilizing EGR

Modiyani

Kocher²,

Alstine³

et al. 2011

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…Zero-dimensional single-zone models are an efficient tool for predicting motor performance in stationary and dynamic operating conditions using modest computing resources and fast performance of simulations [6][7][8][9][10]. Multi-zone combustion models [11][12][13][14][15][16] allow the prediction of emissions of NO x and other pollutants such as soot. In addition to the mentioned advantage of multi-zone models, a longer calculation time is associated.…”

Section: No No X Emission Reduction Technology Expected Reductionmentioning

confidence: 99%

Analysis of the Impact of Split Injection on Fuel Consumption and NOx Emissions of Marine Medium-Speed Diesel Engine

Pelić

Mrakovčić

Radonja

et al. 2020

JMSE

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The medium-speed diesel engine in diesel-electric propulsion systems is increasingly used as the propulsion engine for liquefied natural gas (LNG) ships and passenger ships. The main advantage of such systems is high reliability, better maneuverability, greater ability to optimize and significant decreasing of the engine room volume. Marine propulsion systems are required to be as energy efficient as possible and to meet environmental protection standards. This paper analyzes the impact of split injection on fuel consumption and NOX emissions of marine medium-speed diesel engines. For the needs of the research, a zero-dimensional, two-zone numerical model of a diesel engine was developed. Model based on the extended Zeldovich mechanism was applied to predict NOX emissions. The validation of the numerical model was performed by comparing operating parameters of the basic engine with data from engine manufacturers and data from sea trials of a ship with diesel-electric propulsion. The applicability of the numerical model was confirmed by comparing the obtained values for pressure, temperature and fuel consumption. The operation of the engine that drives synchronous generator was simulated under stationary conditions for three operating points and nine injection schemes. The values obtained for fuel consumption and NOX emissions for different fuel injection schemes indicate the possibility of a significant reduction in NOX emissions but with a reduction in efficiency. The results showed that split injection with a smaller amount of pilot fuel injected and a smaller angle between the two injection allow a moderate reduction in NOX emissions without a significant reduction in efficiency. The application of split injection schemes that allow significant reductions in NOX emissions lead to a reduction in engine efficiency.

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“…Numerous engine models based on mathematical and physical behaviour have been developed and are generally used for control design, optimization, and system analysis [18][19][20]. To enhance the control performance, the EGR mass flow model was derived and then the linear controller gains and the feedforward control output were obtained using the EGR mass flow model.…”

Section: Description Of the Diesel Engine Air Systemmentioning

confidence: 99%

An exhaust gas recirculation control strategy for passenger car diesel engines using an inverse valve model

Lee

Park

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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In diesel engines, accurate control of the exhaust gas recirculation (EGR) is important because of its effects on the nitrogen oxide and particulate matter emissions. The conventional EGR control system adopts a simple proportional-integral (PI) control algorithm with a lookup-table-based feedforward control and gain scheduling. However, this lookup-tablebased control system has limited control performance in transient operations because the lookup tables are obtained from static engine data.The objective of this paper is to improve the control performance of the diesel engine EGR system by using a mathematical model of the EGR path. The proposed EGR control system is composed of PI controller gain scheduling and a feedforward control algorithm based on the mathematical model. The gain-scheduling algorithm provides a PI controller gain based on a sensitivity function that elucidates the relationship between the effective flow area of the EGR valve and the EGR mass flowrate. The feedforward algorithm calculates the EGR valve position based on the inverse model of the EGR valve.The driving cycle test result showed that, compared with the conventional EGR control system, the r.m.s. and maximum values of the target tracking error were reduced by 2.5 per cent and 8.0 per cent respectively.

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Computationally Efficient Whole-Engine Model of a Cummins 2007 Turbocharged Diesel Engine

Cited by 8 publications

References 16 publications

Effect of intake valve closure modulation on effective compression ratio and gas exchange in turbocharged multi-cylinder engines utilizing EGR

Effect of intake valve closure modulation on effective compression ratio and gas exchange in turbocharged multi-cylinder engines utilizing EGR

Analysis of the Impact of Split Injection on Fuel Consumption and NOx Emissions of Marine Medium-Speed Diesel Engine

An exhaust gas recirculation control strategy for passenger car diesel engines using an inverse valve model

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