Real-time control oriented HCCI engine cycle-to-cycle dynamic modelling

Abstract

For homogeneous charge compression ignition (HCCI) combustion, the auto-ignition process is very sensitive to in-cylinder conditions, including in-cylinder temperature, in-cylinder components and concentrations. Therefore, accurate control is required for reliable and efficient HCCI combustion. This paper outlines a simplified gasoline-fueled HCCI engine model implemented in Simulink environment. The model is able to run in real-time and with fixed simulation steps with the aim of cycle-to-cycle control and hardwarein-the-loop simulation. With the aim of controlling the desired amount of the trapped exhaust gas recirculation (EGR) from the previous cycle, the phase of the intake and exhaust valves and the respective profiles are designed to vary in this model. The model is able to anticipate the auto-ignition timing and the in-cylinder pressure and temperature. The validation has been conducted using a comparison of the experimental results on Ricardo Hydro engine published in a research by Tianjin University and a JAGUAR V6 HCCI test engine at the University of Birmingham. The comparison shows the typical HCCI combustion and a fair agreement between the simulation and experimental results.

Diesel locomotive efficiency and reliability improvement as a result of power unit load control system modernisation

“…Numerous studies on the subject have appeared. In the field of motor-car IC engines the majority of investigations are related to IC engine systems control including dynamic states [10,14,15,25,36,61]. In [11] an interesting mathematical model of transient processes in locomotive diesel engines was proposed.…”

Model of exhaust system of a traction diesel engine with pulse supercharging on transient modes

“…In the field of mathematic modelling of operation of automotive engines, most papers relate to control in engine systems with taking into account the transient modes [7,13,18,24,39].…”

Assessment of the impact of dynamic states of an internal combustion engine on its operational properties

“…The use of descriptions (7)(8)(9)(10)(11)(12) and (13)(14)(15)(16)(17)(18) may also be considered with respect to the assumed ranges of values of individual processes. Moreover, there is a possibility of taking into account combinations of engine operation conditions and states defined by the ranges of values of individual processes, signs of derivatives of the processes with respect to time, and zero values of the time derivatives with tolerance ranges appropriately defined (constant-value processes), e.g.…”

“…Most of the works concern the controlling of IC engines with taking into account dynamic states [4,12,14,17,23]. In publication [4], a mathematical model used to simulate the injector operation in a common rail engine fuelling system has been presented.…”

“…Monograph [12], prepared at ETH in Zürich, shows the present-day state of knowledge regarding the modelling of working processes in IC engines in respect of the use of such processes in engine control systems. Publication [14] is dedicated to the use of a mathematical model of the processes taking place in the IC engine to control the processes in an HCCI (Homogenous Charge Compression Ignition) engine. A multidimensional model used for developing IC engine control algorithms with the application of fuzzy logic has been shown in publication [17].…”