The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform

D. Hrovat - One of the best experts on this subject based on the ideXlab platform.

  • Hybrid Model Predictive Control of Direct Injection Stratified Charge Engines
    IEEE ASME Transactions on Mechatronics, 2006
    Co-Authors: N. Giorgetti, G. Ripaccioli, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and model predictive control techniques to the management of air-to-fuel ratio and torque in advanced technology gasoline direct-injection Stratified-Charge (DISC) Engines. A DISC engine is an example of a constrained hybrid dynamical system, because it can operate in two distinct modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced during its operation to avoid misfire, knock, and high combustion variability. In this paper, we approximate the DISC engine dynamics as a two-mode discrete-time switched affine system. Using this approximation, we tune a hybrid model predictive controller with integral action based on online mixed-integer quadratic optimization, and show the effectiveness of the approach through simulations. Then, using an offline multiparametric optimization procedure, we convert the controller into an equivalent explicit piecewise affine form that is easily implementable in an automotive microcontroller through a lookup table of linear gains

  • explicit hybrid optimal control of direct injection Stratified Charge Engines
    International Symposium on Industrial Electronics, 2005
    Co-Authors: N. Giorgetti, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and receding horizon optimal control techniques to the problem of air-to-fuel ratio and torque management in advanced technology gasoline direct injection Stratified Charge (DISC) Engines. A DISC engine represents an example of a constrained hybrid system, because it can operate in two discrete modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced. The paper extends the prior work by the authors [1] and reports the development of an explicit controller which implements the optimal solution using piecewise affine functions of the state, thereby avoiding the need for on-line optimization. Strategies to simplify the explicit controller by reducing the number of regions in its characterization are discussed.

N. Giorgetti - One of the best experts on this subject based on the ideXlab platform.

  • Hybrid Model Predictive Control of Direct Injection Stratified Charge Engines
    IEEE ASME Transactions on Mechatronics, 2006
    Co-Authors: N. Giorgetti, G. Ripaccioli, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and model predictive control techniques to the management of air-to-fuel ratio and torque in advanced technology gasoline direct-injection Stratified-Charge (DISC) Engines. A DISC engine is an example of a constrained hybrid dynamical system, because it can operate in two distinct modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced during its operation to avoid misfire, knock, and high combustion variability. In this paper, we approximate the DISC engine dynamics as a two-mode discrete-time switched affine system. Using this approximation, we tune a hybrid model predictive controller with integral action based on online mixed-integer quadratic optimization, and show the effectiveness of the approach through simulations. Then, using an offline multiparametric optimization procedure, we convert the controller into an equivalent explicit piecewise affine form that is easily implementable in an automotive microcontroller through a lookup table of linear gains

  • explicit hybrid optimal control of direct injection Stratified Charge Engines
    International Symposium on Industrial Electronics, 2005
    Co-Authors: N. Giorgetti, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and receding horizon optimal control techniques to the problem of air-to-fuel ratio and torque management in advanced technology gasoline direct injection Stratified Charge (DISC) Engines. A DISC engine represents an example of a constrained hybrid system, because it can operate in two discrete modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced. The paper extends the prior work by the authors [1] and reports the development of an explicit controller which implements the optimal solution using piecewise affine functions of the state, thereby avoiding the need for on-line optimization. Strategies to simplify the explicit controller by reducing the number of regions in its characterization are discussed.

I.v. Kolmanovsky - One of the best experts on this subject based on the ideXlab platform.

  • Hybrid Model Predictive Control of Direct Injection Stratified Charge Engines
    IEEE ASME Transactions on Mechatronics, 2006
    Co-Authors: N. Giorgetti, G. Ripaccioli, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and model predictive control techniques to the management of air-to-fuel ratio and torque in advanced technology gasoline direct-injection Stratified-Charge (DISC) Engines. A DISC engine is an example of a constrained hybrid dynamical system, because it can operate in two distinct modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced during its operation to avoid misfire, knock, and high combustion variability. In this paper, we approximate the DISC engine dynamics as a two-mode discrete-time switched affine system. Using this approximation, we tune a hybrid model predictive controller with integral action based on online mixed-integer quadratic optimization, and show the effectiveness of the approach through simulations. Then, using an offline multiparametric optimization procedure, we convert the controller into an equivalent explicit piecewise affine form that is easily implementable in an automotive microcontroller through a lookup table of linear gains

  • explicit hybrid optimal control of direct injection Stratified Charge Engines
    International Symposium on Industrial Electronics, 2005
    Co-Authors: N. Giorgetti, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and receding horizon optimal control techniques to the problem of air-to-fuel ratio and torque management in advanced technology gasoline direct injection Stratified Charge (DISC) Engines. A DISC engine represents an example of a constrained hybrid system, because it can operate in two discrete modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced. The paper extends the prior work by the authors [1] and reports the development of an explicit controller which implements the optimal solution using piecewise affine functions of the state, thereby avoiding the need for on-line optimization. Strategies to simplify the explicit controller by reducing the number of regions in its characterization are discussed.

A. Bemporad - One of the best experts on this subject based on the ideXlab platform.

  • Hybrid Model Predictive Control of Direct Injection Stratified Charge Engines
    IEEE ASME Transactions on Mechatronics, 2006
    Co-Authors: N. Giorgetti, G. Ripaccioli, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and model predictive control techniques to the management of air-to-fuel ratio and torque in advanced technology gasoline direct-injection Stratified-Charge (DISC) Engines. A DISC engine is an example of a constrained hybrid dynamical system, because it can operate in two distinct modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced during its operation to avoid misfire, knock, and high combustion variability. In this paper, we approximate the DISC engine dynamics as a two-mode discrete-time switched affine system. Using this approximation, we tune a hybrid model predictive controller with integral action based on online mixed-integer quadratic optimization, and show the effectiveness of the approach through simulations. Then, using an offline multiparametric optimization procedure, we convert the controller into an equivalent explicit piecewise affine form that is easily implementable in an automotive microcontroller through a lookup table of linear gains

  • explicit hybrid optimal control of direct injection Stratified Charge Engines
    International Symposium on Industrial Electronics, 2005
    Co-Authors: N. Giorgetti, A. Bemporad, I.v. Kolmanovsky, D. Hrovat
    Abstract:

    This paper illustrates the application of hybrid modeling and receding horizon optimal control techniques to the problem of air-to-fuel ratio and torque management in advanced technology gasoline direct injection Stratified Charge (DISC) Engines. A DISC engine represents an example of a constrained hybrid system, because it can operate in two discrete modes (Stratified and homogeneous) and because the mode-dependent constraints on the air-to-fuel ratio and on the spark timing need to be enforced. The paper extends the prior work by the authors [1] and reports the development of an explicit controller which implements the optimal solution using piecewise affine functions of the state, thereby avoiding the need for on-line optimization. Strategies to simplify the explicit controller by reducing the number of regions in its characterization are discussed.

Rafig Mehdiyev - One of the best experts on this subject based on the ideXlab platform.

  • co2 emission reduction using Stratified Charge in spark ignition Engines
    Energy & Fuels, 2009
    Co-Authors: Cenk Dinc, Hikmet Arslan, Rafig Mehdiyev
    Abstract:

    According to the proposal of the European Commission, the average CO2 emission of passenger cars will be limited to 120 g/km by the end of 2012. Decreasing the CO2 emissions is possible only with the decrease of fuel consumption, and this can be achieved most effectively by operating the engine with the Stratified Charge principle. With the aid of a thermodynamic internal combustion (IC) engine model, it is seen that Stratified Charge Engines have the potential to attain a reduction in CO2 emissions up to 19%, by using higher rates of stratification and higher compression ratios. In this context, a Stratified Charge engine having a unique twin swirl combustion chamber operating with a two-stage combustion mechanism is presented. A 1.6 L 8v single-point injection test engine has been analyzed to compare the power output and specific fuel consumption values of a conventional gasoline engine with a Stratified Charge engine having a twin swirl combustion chamber. The results show that, when Stratified Charge ...