Model-based boost pressure control with system voltage disturbance rejection

Criscuolo, Ivan; Leufvén, Oskar; Thomasson, Andreas; Eriksson, Lars

doi:10.3182/20110828-6-it-1002.02214

Cited by 3 publications

(6 citation statements)

References 14 publications

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“…This paper builds upon these results, and develops a novel model connecting the subsystems while reducing the need for detailed solenoid measurements, geometric data, and magnetic properties. In particular it extends the results of Criscuolo, Leufven, Thomasson, and Eriksson (2011), and the main contribution is a physically based system model for the pneumatic actuator system that is easy to tune from measurements. The model balances model complexity and capability to describe the system, from a boost pressure control perspective.…”

Section: Related Research and Contributionssupporting

confidence: 53%

Modeling and validation of a boost pressure actuation system, for a series sequentially turbocharged SI engine

Thomasson

Leufvén

Criscuolo

et al. 2013

Control Engineering Practice

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a b s t r a c tAn actuation system for flexible control of an advanced turbocharging system is studied. It incorporates a vacuum pump and tank that are connected to pulse width modulation controlled vacuum valves. A methodology for modeling the entire boost pressure actuation system is developed. Emphasis is placed on developing component models that are easily identified from measured data, without the need for expensive measurements.The models have physical interpretations that enable handling of varying surrounding conditions.The component models and integrated system are evaluated on a two stage series sequential turbo system with three actuators having different characteristics.Several applications of the developed system model are presented, including a nonlinear compensator for voltage disturbance rejection where the performance of the compensator is demonstrated on an engine in a test cell. The applicability of the complete system model for control and diagnosis of the vacuum system is also discussed.

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Section: Related Research and Contributionssupporting

confidence: 53%

Modeling and validation of a boost pressure actuation system, for a series sequentially turbocharged SI engine

Thomasson

Leufvén

Criscuolo

et al. 2013

Control Engineering Practice

Self Cite

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show abstract

“…This paper builds upon these results, and develops a novel model connecting the subsystems while reducing the need for detailed solenoid measurements, geometric data, and magnetic properties. In particular it extends the results of Criscuolo et al (2011), and the main contribution is a physically based system model for the pneumatic actuator system that is easy to tune from measurements. The model balances model complexity and capability to describe the system, from a boost pressure control perspective.…”

Section: Related Research and Contributionsmentioning

confidence: 79%

“…supply voltage, is effectively rejected. Combining this with for example the gain scheduled feedback in Criscuolo et al (2011), enables integration of the system model in a complete model based boost control structure.…”

Section: Model Based Boost Controlmentioning

confidence: 99%

“…A compensation for supply voltage is then calculated using (15). This was proposed and tested on the LPT actuator in Criscuolo et al (2011) and has been extended and to include the HPT and HPC actuator as well. The compensation was tested with a voltage disturbance and the results are shown in Figure 17, where open loop control with and without the voltage compensation has been subjected to the same disturbance.…”

Section: Supply Voltage Compensationmentioning

confidence: 99%

“…The model balances model complexity and capability to describe the system, from a boost pressure control perspective. Compared to Criscuolo et al (2011) the analysis is extended, and a generalized modeling methodology is developed. The methodology is shown to be applicable to all three actuators of a series sequential two stage charging system, and thus also includes the compressor bypass valve.…”

Section: Related Research and Contributionsmentioning

confidence: 99%

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

Thomasson¹

2014

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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...

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