A Study on the Steering Force Feedback Control of the Steer by Wire System Using HiLS

Lee, Sang-Jun; Lee, Yongkwon; Jeong, Hyunjin; Lee, Minhyuk

doi:10.7467/ksae.2021.29.1.049

Cited by 2 publications

(2 citation statements)

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“…The results of the Nusselt number (Nu D ) presented in literature are used to obtain the h g (x) in the thermal entrance region and the fully developed region. Here, Nu D is a non-dimensional number denoting the ratio of convective to conductive heat transfer, defined as in Equation (17).…”

Section: Applied Conditions and Analysismentioning

confidence: 99%

“…The EHC has been introduced as a measure to increase the operating temperatures of three-way catalysts (TWCs) in gasoline engines during the cold start [11][12][13]. It has also been applied to diesel oxidation catalysts (DOC) and urea-SCR systems to enhance the evaporation and decomposition performance of the urea-water solution, particularly in cold start conditions by increasing the exhaust gas temperature [14][15][16][17]. The evaporation and decomposition performance can be further enhanced by injecting the urea-water solution directly into the heater in the EHC so that the thermal energy of the heater can be used.…”

Section: Introductionmentioning

confidence: 99%

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Simplified Modeling and Analysis of Surface Temperature Distribution in Electrically Heated Catalyst for Diesel Urea-SCR Systems

et al. 2022

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Impending emission regulations of diesel engines for construction machineries would regulate nitrogen oxide emissions strictly in cold operating conditions. The urea-based selective catalytic reduction (urea-SCR) system coupled with the electrically heated catalyst (EHC) has been considered as a potential measure to meet the strict emission regulations by promoting evaporation and thermal decomposition of urea–water solution in cold operating conditions. Analyzing the thermal conditions in the EHC is crucial for the optimized operation and control of EHC-based urea-SCR systems under various engine operating conditions. In the current study, we introduce a simple one-dimensional analysis scheme to characterize the surface temperature distribution in the EHC based on energy conservation and the theories of forced internal convection. Since the EHC has a complicated internal structure with fine flow cells inside it, a flow cell in the EHC is extracted for the one-dimensional heat transfer analysis. EHC operation parameters such as exhaust gas flow rate and supplied electric power to the EHC are scaled to be applied for the flow cell analysis. The adequacy of the analysis scheme is then validated by surface temperature measurement results at the EHC outlet. The validation results showed over 95% prediction accuracy of the 1D analysis scheme in the operating conditions of a heavy-duty diesel engine. Based on proven reliability, the effects of geometric and operation parameters on the surface temperature distribution in the EHC were analyzed and discussed using the analysis results.

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Section: Applied Conditions and Analysismentioning

confidence: 99%