A surge and choke capable compressor flow model—Validation and extrapolation capability

Leufvén, Oskar; Eriksson, Lars

doi:10.1016/j.conengprac.2013.07.005

Cited by 38 publications

(28 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The com-pressor mass flow is modeled using super-ellipses centred at the origin. A similar approach is found in Leufvén and Eriksson (2013). The explicit expression of a super-ellipse isṁ…”

Section: Compressormentioning

confidence: 91%

Modeling of a Large Marine Two-Stroke Diesel Engine with Cylinder Bypass Valve and EGR System

Alegret¹,

Llamas

Vejlgaard-Laursen³

et al. 2015

IFAC-PapersOnLine

Self Cite

View full text Add to dashboard Cite

A nonlinear mean value engine model (MVEM) of a two-stroke turbocharged marine diesel engine is developed, parameterized and validated against measurement data. The goal is to have a computationally fast and accurate engine model that captures the main dynamics and can be used in the development of control systems for the newly introduced EGR system. The tuning procedure used is explained, and the result is a six-state MVEM with seven control inputs that capture the main system dynamics.

show abstract

Section: Compressormentioning

confidence: 91%

Modeling of a Large Marine Two-Stroke Diesel Engine with Cylinder Bypass Valve and EGR System

Alegret¹,

Llamas

Vejlgaard-Laursen³

et al. 2015

IFAC-PapersOnLine

Self Cite

View full text Add to dashboard Cite

show abstract

“…The compressor massflow model is developed in Leufvén and Eriksson (2013) and further described in Eriksson and Nielsen (2014). The model used in this paper is the representation from Eriksson and Nielsen (2014) …”

Section: Compressor Massflowmentioning

confidence: 99%

Optimal Control ofWastegate Throttle and Fuel Injection for a Heavy-Duty Turbocharged Diesel Engine During Tip-In Throttle and Wastegate Developed for Optimal Control Applications

Ekberg¹,

Leek²,

Holmer³

et al. 2017

Linköping Electronic Conference Proceedings

Self Cite

View full text Add to dashboard Cite

The diesel engine remains one of the key components in the global economy, transporting most of the worlds goods. To cope with stricter regulations and the continuous demand for lower fuel consumption, optimization is a key method. To enable mathematical optimization of the diesel engine, appropriate models need to be developed. These are preferably continuously differentiable, in order to be used with a gradient-based optimization solver. Demonstration of the optimization-based methodology is also necessary in order for the industry to adapt it. The paper presents a complete mean value engine model structure, tailored for optimization and simulation purposes. The model is validated using measurements on a heavyduty diesel engine. The validated model is used to study the transient performance during a time-optimal tip-in, the results validate that the model is suitable for simulation and optimization studies.

show abstract

“…Both use relations between the dimensionless parameters for flow, Φ, and energy, Ψ, to model compressor mass flow and efficiency. Another model that directly parameterize compressor speed lines and can handle both the surge and choke region of the compressor is presented in Leufvén and Eriksson (2013).…”

Section: Engine Modeling and Boost Controlmentioning

confidence: 99%

Modeling and control of actuators and co-surge in turbocharged engines

Thomasson¹

2014

View full text Add to dashboard Cite

Paper 1 is reproduced here with permission from IFP Energies nouvelles Paper 2 is reproduced here with permission from IFAC Paper 3 is reproduced here with permission from Elsevier Paper 4 is reproduced here with permission from IFAC The cover: Photo of an electronic throttle, a pneumatic actuator, and a measurement of mass flows during co-surge, illustrating the main topics of the thesis. Typeset with L A T E X 2εPrinted by LiU-Tryck, Linköping, Sweden 2014 i AbstractThe torque response of the engine is important for the driving experience of a vehicle. In spark ignited engines, torque is proportional to the air flow into the cylinders. Controlling torque therefore implies controlling air flow. In modern turbocharged engines, the driver commands are interpreted by an electronic control unit that controls the engine through electromechanical and pneumatic actuators. Air flow to the intake manifold is controlled by an electronic throttle, and a wastegate controls the energy to the turbine, affecting boost pressure and air flow. These actuators and their dynamics affect the torque response and a lot of time is put into calibration of controllers for these actuators. By modeling and understanding the actuator behavior this dynamics can be compensated for, leaving a reduced control problem, which can shorten the calibration time.Electronic throttle servo control is the first problem studied. By constructing a control oriented model for the throttle servo and inverting that model, the resulting controller becomes two static compensators for friction and limp-home nonlinearities, together with a PD-controller. A gain-scheduled I-part is added for robustness to handle model errors. The sensitivity to model errors is studied and a method for tuning the controller is presented. The performance has been evaluated in simulation, in test vehicle, and in a throttle control benchmark.A model for a pneumatic wastegate actuator and solenoid control valve, used for boost pressure control, is presented. The actuator dynamics is shown to be important for the transient boost pressure response. The model is incorporated in a mean value engine model and shown to give accurate description of the transient response. A tuning method for the feedback (PID) part of a boost controller is proposed, based on step responses in wastegate control signal. Together with static feedforward the controller is shown to achieve the desired boost pressure response. Submodels for an advanced boost control system consisting of several vacuum actuators, solenoid valves, a vacuum tank and a vacuum pump are developed. The submodels and integrated system are evaluated on a two stage series sequential turbo system, and control with system voltage disturbance rejection is demonstrated on an engine in a test cell.Turbocharged V-type engines often have two parallel turbochargers, each powered by one bank of cylinders. When the two air paths are connected before the throttle an unwanted oscillation can occur. When the compressors operate close to the surge lin...

show abstract

A surge and choke capable compressor flow model—Validation and extrapolation capability

Cited by 38 publications

References 59 publications

Modeling of a Large Marine Two-Stroke Diesel Engine with Cylinder Bypass Valve and EGR System

Modeling of a Large Marine Two-Stroke Diesel Engine with Cylinder Bypass Valve and EGR System

Optimal Control ofWastegate Throttle and Fuel Injection for a Heavy-Duty Turbocharged Diesel Engine During Tip-In Throttle and Wastegate Developed for Optimal Control Applications

Modeling and control of actuators and co-surge in turbocharged engines

Contact Info

Product

Resources

About