Research on the Parameter Calibration of the Internal-Combustion Engine Work Process Simulation Model

Abstract

The computer simulation technology of the work process of internal-combustion engine is the important measure to study the internal-combustion engine, but generally, because of the uncertainty of input parameters, the precision of the simulation model of the engine work process, which largely limits the application of the simulation model, so the parameters of the simulation model needs to be calibrated. Taking the work process of the certain one type turbocharging diesel engine as the example, and combining the genetic algorithm with the ant colony algorithm, the parameter combination which can satisfy the requirements of precision, is selected in this article to effectively reduce the simulation experiment times of parameter calibration, and realize the automatic calibration of the simulation model parameters. By comparing and analyzing the practical result of the experiment and the result of the simulation computation, the effectiveness of the algorithm has been validated in the article.

Innovative Calibration Method for System Level Simulation Models of Internal Combustion Engines

“…Figure 11 indicates that the measured pressure drop exhibits an approximately quadratic trend with the increasing air mass-flow. Although Equation (20) includes a quadratic velocity term and pipe friction coefficient determined through empirical correlation (Equations (21) and (22)), it can be seen in Figure 11 that after calibration, values of the FrMp differ by more than a factor of two due to the reasons exposed at the beginning of this paragraph. This illustrative example clearly exposes the need to include the tuning parameters to allow for reproducing experimentally measured trends.…”

“…However, a lower number of CBPs enables easier and faster handling of this issue by narrowing intervals of inequality constraints and therefore the repetition of the optimization process as elaborated in Section 4.5.4. In summary, HCM enables faster and more accurate calibration of the ICESM with an arbitrary number of CBPs in comparison with procedures based on the optimization methods only (e.g., Reference [20]). …”

“…Therefore, governing Equations (13)- (22) were employed for deriving appropriate CBPs, respectively. FrMp was identified as a CBP of the air cleaner, intercooler and EGR cooler for the pressure drop calibration according to Equation (20), whereas the orifice flow coefficient ( ) was identified for the catalyst according to Equation (13). In addition, HTMp was selected as a CBP for tuning of the temperature difference across the intercooler and EGR cooler according to Equation (19).…”

“…The authors of [20] offer the automated calibration of combustion and heat transfer parameters in a cylinder (e.g., the radiation coefficient, the combustion terminal angle, the oil-drop breaking length, the rolling absorption rates before and after combustion, the rolling absorption rate after impaction, the early rolling fluctuation rate, the early rolling duration, the combustion speed and the flame retarding coefficient) of the ICE model in Reference [2], using the advantages of a combination of two optimization algorithms, the ant colony and genetic algorithm, respectively. The methodology is focused on only three engine output results, e.g., power, brake specific fuel consumption and the turbocharger turbine inlet temperature at engine full-load steady-state operation.…”

Efficient simulation and auto-calibration of soot particle processes in Diesel engines

“…It has been shown that the presented approach is able to efficiently calibrate the Diesel engine model, and that a higher calibration accuracy is achieved compared to manual calibration. In [28], a combination of GA and ant colony algorithms for calibrating combustion and heat transfer parameters including radiation coefficient, the combustion speed and terminal angle is proposed. This new approach has been shown to satisfy the required accuracy with reduced simulation times.…”