http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
ACAUSAL MODELING METHOD AND ITS VERIFICATION OF ENGINE CYCLE SIMULATION FOR EMISSIONS PREDICTION
Norifumi Mizushima,Mitsuharu Oguma 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.2
In recent years, acausal modeling languages such as Modelica and VHDL-AMS have been used for model- based development. In this research, a cycle simulation model using an acausal modeling language for predicting the emissions of an internal combustion engine was developed for application to a vehicle simulation model for energy and emissions analysis. In order to develop simulation models with higher versatility and extensibility using an acausal modeling language, it is necessary to design the structure and hierarchy by understanding its rules and constraints. Hence, the modeling method of the engine cycle simulation using the acausal modeling language Modelica for emissions prediction was discussed. Furthermore, nitrogen oxide emissions were calculated using the developed model, and their accuracy was validated by comparison with experimental data on a spark ignition engine.
IMPROVEMENT OF TRANSIENT OPERATION CONTROLLABILITY IN ENGINE TEST BENCH FOR HEAVY-DUTY VEHICLES
Norifumi Mizushima,Shigeo Sato,Hiroyuki Yagi,Hisakazu Suzuki 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.6
In this study, two kinds of control methods for the transient operation of an engine test bench for heavy-duty vehicles were applied in the JE05 test cycle and World Harmonized Transient Cycle (WHTC) test conditions in order to evaluate the controllability of transient operations and the effect on emissions. One control method uses dynamometer torque with its inertia correction as the feedback signal (dyno torque F/B control); the other method uses axial torque measured by a flange-type high-response torque meter as the feedback signal (axial torque F/B control). The transient operation controllability using the axial torque F/B control improved compared with the dyno torque F/B control. The results influence NOx emissions in the emissions test cycle, such as JE05 and WHTC, with the engine test bench. Axial torque F/B control could become a more useful technique when it is required to improve the reproducibility of real driving conditions.