Multiple-input multiple-output control of diesel combustion using a control-oriented model

Abstract

In this study, a multiple-input multiple-output feedforward controller for use with multiple-point fuel injection systems is applied to a diesel engine using an original control-oriented model. The target-tracking performance of this multiple-input multiple-output feedforward controller was then tested in terms of how well the controller adjusts the fuel delivery ratios to the pilot injection, pre-injection, main fuel injection, and the main fuel injection timing, and controls the in-cylinder peak pressure and its timing. Control experiments are conducted at different engine outputs and speeds while changing the targets of the in-cylinder peak pressure and its timing. The controller is able to track the varying targets within an acceptable error included in the original model. The calculation time, which is almost double that of a single-input single-output controller, is sufficiently fast to derive the applicable inputs.

Control Technologies for Advanced Engines and Powertrains: A Review

“…Next, the following studies describe control methods that were proposed using various models. Takahashi et al (34,35) proposed a discretized combustion model for the heat release rate in a multistage injection PCCI-like diesel engine for a more precise control of engine combustion. In addition, they designed a multiinput multi-output FF controller from an inverse model of the discretized combustion model and verified the controller under steady and transient operating conditions.…”

Hierarchical model predictive control for an off-highway diesel engine with SCR catalyst

“…[5][6][7][8][9] State-of-the-art approaches solve the corresponding optimization problem offline and store its solution into high-dimensional look-up tables. 1,2,10 Classical control loops are used to stabilize the optimal solution. This way, the low computational power of an engine control unit (ECU) is sufficient to control the engine optimally.…”

Control-oriented modeling of the gas exchange process in rebreathing homogeneous charge compression ignition engines

“…To design real-time control systems, several approaches have been proposed to shorten the computation time, such as discrete models or meanvalue models. There have been several researches on the controllers using a discrete models, for example, for diesel engines, [14][15][16][17] dual-fuel engines, 18 and NVO HCCI engines. 19 Rausen et al 20 developed a mean-value model for rebreathing HCCI engines and Chiang et al 21 constructed controllers based on this mean-value model.…”