Model Based Optimisation of a Step in Acceleration for a CR-Diesel Engine

Sequenz, Heiko; Mrosek, Matthias; Zydek, Simon; Isermann, Rolf

doi:10.3182/20110828-6-it-1002.03128

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Airflow pathways through the engine intake and exhaust, with associated sensors, temperature, and pressure nomenclature are borrowed from Sequenz et al 18 …”

Section: Methodsmentioning

confidence: 99%

Model-based compressor surge avoidance algorithm for internal combustion engines utilizing cylinder deactivation during motoring conditions

Taylor

Odstrcil

Ramesh

et al. 2019

International Journal of Engine Research

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Cylinder deactivation is an efficient strategy for diesel engine exhaust aftertreatment thermal management. Temperatures in excess of 200 °C are necessary for peak NO x conversion efficiency of the aftertreatment system. However, during non-fired engine operation, known as motoring, conventional diesel engines pump low-temperature air through the aftertreatment system. One strategy to mitigate this is to deactivate valve motion during engine motoring. There is a specific condition where care must be taken to avoid compressor surge during the onset of valve deactivated motoring when following high load operation. This study proposes and validates an algorithm which (1) predicts the intake manifold pressure increase instigated while transitioning into cylinder deactivation during motoring, (2) estimates future mass air flow, and (3) avoids compressor surge by implementing staged cylinder deactivation during the onset of engine motoring operation.

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“…Airflow pathways through the engine intake and exhaust, with associated sensors, temperature, and pressure nomenclature are borrowed from Sequenz et al 18 …”

Section: Methodsmentioning

confidence: 99%

Model-based compressor surge avoidance algorithm for internal combustion engines utilizing cylinder deactivation during motoring conditions

Taylor

Odstrcil

Ramesh

et al. 2019

International Journal of Engine Research

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“…Research within the topic of optimizing transient engine operation has mainly been focused on finding optimal actuator trajectories for specified single engine transients. Examples of methods for this are presented in Sequenz, Mrosek, Zydek, andIsermann (2011), Alberer anddel Re (2009) and Benz, Hehn, Onder, and Guzella (2011). These methods are not well suited for online implementation into a real EMS, since optimal trajectories for single transients cannot be directly transferred to an EMS strategy that can handle all possible transients in an engine.…”

Section: Introductionmentioning

confidence: 99%

Model-based diesel Engine Management System optimization for transient engine operation

Grahn

Johansson

McKelvey

2014

Control Engineering Practice

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Citation for the published paper: Grahn, M. ; Johansson, K. ; McKelvey, T. (2014) "Model-based diesel Engine Management System optimization for transient engine operation". Control Engineering Practice, vol. 29 pp. 103-114.http://dx. a b s t r a c tA recently developed strategy to calculate set points for controllable diesel engine systems is described, further developed, and evaluated. The strategy calculates set points with an aim to minimize fuel consumption for a given dynamic vehicle driving cycle, while keeping accumulated emissions below given limits. The strategy is based on existing methodology for steady-state engine operation, but extended to handle transient effects in the engine caused by dynamics in the engine air system. Using the strategy, set points for the complete operating range of the engine can be calculated off-line and stored in an Engine Management System, hence set points can be derived for any (steady-state or transient) driving scenario. The strategy has been evaluated using a simulation model of a complete diesel engine vehicle system. The model estimates fuel consumption, NO X , and soot emissions for a dynamic vehicle driving cycle depending on set points for boost pressure, oxygen fraction in the intake manifold, and injection timing, throughout the simulation. Using this simulation model, the strategy has been shown to decrease fuel consumption for the New European Driving Cycle with 0.56%, the Federal Test Procedure with 1.04%, and the Japanese JC08 cycle with 0.84% compared to a strategy based on steady-state engine operation.

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“…Research within the topic of optimizing transient engine operation has mainly been focused on finding optimal actuator trajectories for specified single engine transients. Examples of methods for this are presented in Sequenz et al (2011), Alberer and del Re (2009) and Benz et al (2011). These methods are not well suited for online implementation, since optimal trajectories for single transients cannot be directly transferred to a general EMS strategy.…”

Section: Introductionmentioning

confidence: 99%

A Transient Diesel EMS Strategy for Online Implementation

Grahn

Johansson

McKelvey

2014

IFAC Proceedings Volumes

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A recently developed strategy for diesel engine management systems is modified to reduce the implementation complexity. The strategy calculates set points for engine management system controllable quantities with an aim to minimize fuel consumption for a given engine speed and requested torque profile, while keeping accumulated emissions below given limits. The strategy is based on the methodology for steady-state engine operation, but extended to handle transient effects in the engine caused by dynamics in the air system. The strategy leads to the parametrization of mappings with two, three and four input dimensions respectively. In this paper, a modification of the strategy is proposed such that the memory demanding multidimensional mappings can be approximated in an engine management system using only two-dimensional grid maps. The modified strategy has been evaluated using a complete diesel engine vehicle system model simulating the NEDC driving cycle. The performance of the modified strategy has been compared with the original performance of the strategy. It is demonstrated that the modification of the strategy has very little impact on resulting performance of a vehicle but requires considerably less memory for implementation.

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Model Based Optimisation of a Step in Acceleration for a CR-Diesel Engine

Cited by 7 publications

References 12 publications

Model-based compressor surge avoidance algorithm for internal combustion engines utilizing cylinder deactivation during motoring conditions

Model-based compressor surge avoidance algorithm for internal combustion engines utilizing cylinder deactivation during motoring conditions

Model-based diesel Engine Management System optimization for transient engine operation

A Transient Diesel EMS Strategy for Online Implementation

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