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Experimental Characterization of the Mechanical Loss Components of a Single-Cylinder Spark-Ignition Engine by Progressive Disassembly Method
Technical Paper
2023-01-0416
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In this work, the progressive disassembly method is used to determine the mechanical losses contributed by the different components of a single-cylinder spark ignition engine tested at crankshaft angular speeds of 300−1900 min-1, and lubricant temperatures between 30−35 °C. From the experimental measurements, the losses due to the intake and exhaust manifolds, cylinder head, valve train, camshaft bearings, connecting rod-piston assembly, flywheel, and crankshaft bearings are determined. It is obtained that the elements with the highest contribution are the piston-connecting rod assembly and the cylinder head with contributions of 19.2−36.9% and 27−33.3%, respectively. Additionally, the indicated diagram method is applied to assess the pumping, heat, and blow-by losses of the complete motored engine during the intake and exhaust processes. Pumping losses, heat and blow-by transfers, friction, and auxiliary losses are characterized, obtaining contributions between 5.8−14.7%, 14.8−37.9%, 46.4−64.6%, and 5.8−9.9% for each group of component losses, respectively.
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Romero, C., Ramírez, J., and Henao Castañeda, E., "Experimental Characterization of the Mechanical Loss Components of a Single-Cylinder Spark-Ignition Engine by Progressive Disassembly Method," SAE Technical Paper 2023-01-0416, 2023, https://doi.org/10.4271/2023-01-0416.Also In
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