The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform

Jonas Mårtensson - One of the best experts on this subject based on the ideXlab platform.

  • Exhaust Pressure modeling and control on an si engine with vgt
    Control Engineering Practice, 2014
    Co-Authors: Oscar Flärdh, Jonas Mårtensson
    Abstract:

    For a turbocharged si engine, the Exhaust Pressure is of high importance for the gas exchange process as well as for the turbine power. It is therefore important to control the Exhaust Pressure acc ...

  • CDC - Nonlinear Exhaust Pressure control of an SI engine with VGT using partial model inversion
    49th IEEE Conference on Decision and Control (CDC), 2010
    Co-Authors: Oscar Flärdh, Jonas Mårtensson
    Abstract:

    An important target for car manufacturers when developing new cars is to reduce fuel consumption. One approach to this problem is to use a downsized turbocharged engine. To fully utilize the benefits of the new hardware introduced, good control systems are needed. This paper presents a nonlinear controller for controlling the Exhaust Pressure in a SI engine equipped with VGT. A mapping from the states, inputs and disturbances to future outputs is formed, and inverting the input-output relation in this mapping gives a control law. An analysis shows that the controller adapts its gain to the input-output sensitivity. The controller is evaluated using both simulations and measurements on a real engine, showing the benefit of using the nonlinear controller over a corresponding linear controller.

Oscar Flärdh - One of the best experts on this subject based on the ideXlab platform.

  • Exhaust Pressure modeling and control on an si engine with vgt
    Control Engineering Practice, 2014
    Co-Authors: Oscar Flärdh, Jonas Mårtensson
    Abstract:

    For a turbocharged si engine, the Exhaust Pressure is of high importance for the gas exchange process as well as for the turbine power. It is therefore important to control the Exhaust Pressure acc ...

  • CDC - Nonlinear Exhaust Pressure control of an SI engine with VGT using partial model inversion
    49th IEEE Conference on Decision and Control (CDC), 2010
    Co-Authors: Oscar Flärdh, Jonas Mårtensson
    Abstract:

    An important target for car manufacturers when developing new cars is to reduce fuel consumption. One approach to this problem is to use a downsized turbocharged engine. To fully utilize the benefits of the new hardware introduced, good control systems are needed. This paper presents a nonlinear controller for controlling the Exhaust Pressure in a SI engine equipped with VGT. A mapping from the states, inputs and disturbances to future outputs is formed, and inverting the input-output relation in this mapping gives a control law. An analysis shows that the controller adapts its gain to the input-output sensitivity. The controller is evaluated using both simulations and measurements on a real engine, showing the benefit of using the nonlinear controller over a corresponding linear controller.

Ibrahim Haskara - One of the best experts on this subject based on the ideXlab platform.

  • Exhaust Pressure Estimation and Its Application to Detection and Isolation of Turbocharger System Faults for Internal Combustion Engines
    Journal of Dynamic Systems Measurement and Control, 2011
    Co-Authors: Yue-yun Wang, Ibrahim Haskara
    Abstract:

    Engine Exhaust backPressure is a critical parameter in the calculation of the volumetric efficiency and Exhaust gas recirculation flow of an internal combustion engine. The backPressure also needs to be controlled to a presetting limit under high speed and load engine operating conditions to avoid damaging a turbocharger. In this paper, a method is developed to estimate Exhaust Pressure for internal combustion engines equipped with variable geometry turbochargers. The method uses a model-based approach that applies a coordinate transformation to generate a turbine map for the estimation of Exhaust Pressure. This estimation can substitute for an expensive Pressure sensor, thus saving significant cost for production vehicles. On the other hand, for internal combustion engines that have already installed Exhaust Pressure sensors, this estimation can be used to generate residual signals for model-based diagnostics. Cumulative sum algorithms are applied to residuals based on multiple sensor fusion, and with the help of signal processing, the algorithms are able to detect and isolate critical failure modes of a turbocharger system.

  • ACC - Exhaust Pressure estimation and its application to variable geometry turbine and wastegate diagnostics
    Proceedings of the 2010 American Control Conference, 2010
    Co-Authors: Yue-yun Wang, Ibrahim Haskara
    Abstract:

    Exhaust Pressure is a critical engine parameter used to calculate engine volumetric efficiency and EGR flow rate. In this paper, Exhaust Pressure is estimated for an internal combustion engine equipped with a variable geometry turbocharger. A coordinate transformation is applied to generate a turbine map for estimation of the Exhaust Pressure. This estimation can be used to replace an expensive Pressure sensor for cost saving. On the other hand, for internal combustion engines that have already installed Exhaust Pressure sensors, this estimation can be used to generate residual signals for model-based diagnostics. Based on the residual signals, two diagnostic methods are proposed: one based on cumulative sum algorithms and the other based on pattern recognition and neural networks. The algorithms are able to detect and isolate different failure modes for a turbocharger system.

Yue-yun Wang - One of the best experts on this subject based on the ideXlab platform.

  • Exhaust Pressure Estimation and Its Application to Detection and Isolation of Turbocharger System Faults for Internal Combustion Engines
    Journal of Dynamic Systems Measurement and Control, 2011
    Co-Authors: Yue-yun Wang, Ibrahim Haskara
    Abstract:

    Engine Exhaust backPressure is a critical parameter in the calculation of the volumetric efficiency and Exhaust gas recirculation flow of an internal combustion engine. The backPressure also needs to be controlled to a presetting limit under high speed and load engine operating conditions to avoid damaging a turbocharger. In this paper, a method is developed to estimate Exhaust Pressure for internal combustion engines equipped with variable geometry turbochargers. The method uses a model-based approach that applies a coordinate transformation to generate a turbine map for the estimation of Exhaust Pressure. This estimation can substitute for an expensive Pressure sensor, thus saving significant cost for production vehicles. On the other hand, for internal combustion engines that have already installed Exhaust Pressure sensors, this estimation can be used to generate residual signals for model-based diagnostics. Cumulative sum algorithms are applied to residuals based on multiple sensor fusion, and with the help of signal processing, the algorithms are able to detect and isolate critical failure modes of a turbocharger system.

  • ACC - Exhaust Pressure estimation and its application to variable geometry turbine and wastegate diagnostics
    Proceedings of the 2010 American Control Conference, 2010
    Co-Authors: Yue-yun Wang, Ibrahim Haskara
    Abstract:

    Exhaust Pressure is a critical engine parameter used to calculate engine volumetric efficiency and EGR flow rate. In this paper, Exhaust Pressure is estimated for an internal combustion engine equipped with a variable geometry turbocharger. A coordinate transformation is applied to generate a turbine map for estimation of the Exhaust Pressure. This estimation can be used to replace an expensive Pressure sensor for cost saving. On the other hand, for internal combustion engines that have already installed Exhaust Pressure sensors, this estimation can be used to generate residual signals for model-based diagnostics. Based on the residual signals, two diagnostic methods are proposed: one based on cumulative sum algorithms and the other based on pattern recognition and neural networks. The algorithms are able to detect and isolate different failure modes for a turbocharger system.

Chen Yi-wen - One of the best experts on this subject based on the ideXlab platform.

  • Simulation and Analysis of Engine Exhaust Pressure Wave
    Computer Simulation, 2010
    Co-Authors: Chen Yi-wen
    Abstract:

    To study the relationship between the formation and dissemination of Pressure wave and engine working condition,this paper creates a four-cylinder four-stroke gasoline engine model with GT-POWER software.The results show that four Pressure wave crests and troughs have appeared,corresponding to the four-cylinder Exhaust travel respectively.When the engine speed is modified,Exhaust Pressure will affect the amplitude of the wave,harmonic components,phase,and other parameters.At the end of Exhaust trip,interference,superposition,negative effect of Exhaust Pressure wave will occur in the Exhaust pipe.The results are of great significance to engine integrated fault diagnosis using Exhaust Pressure wave.

  • Simulation Analysis of Engine Exhaust Pressure Wave Based on GT-SUITE
    Tractor & Farm Transporter, 2009
    Co-Authors: Chen Yi-wen
    Abstract:

    To study the relationship between the formation and dissemination of Pressure wave and engine's working conditions,this paper creates a four-cylinder four-stroke gasoline engine model with GT-POWER software.The results show that four wave crests and troughs have appeared,respectively,corresponding to the four-cylinder Exhaust travel.When the engine speed is modified,Exhaust Pressure can affects the Pressure wave's amplitude,harmonic components,phase,and other parameters.At the end of Exhaust trip,interference,superposition,negative Pressure effect of Exhaust Pressure wave will occur in the Exhaust pipe.