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Thermal characterization and structural optimization of a coolant preheating system for cold start of diesel–electric hybrid powertrains
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DOI：10.1016/j.applthermaleng.2026.132673.png)
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Abstract
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• A one-dimensional model is developed to characterize the thermal behavior of a diesel engine coolant preheating system under extremely cold conditions. • The minimum coolant and lubricating oil temperature boundaries required for reliable cold start are determined. • The effects of heat transfer structure on coolant–lubricating oil thermal interaction and preheating performance are clarified. • An optimal temperature combination and corresponding structural parameters are obtained, reducing preheating time by approximately 21%.
Keywords:
Diesel–electric hybrid powertrains
Cold start
Coolant preheating
Heat-transfer performance
Structural optimization
Journal
IF:
6.9
Papers:
2.6W
Citations:
10.6W
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Cited Papers