Transient Engine and Piston Friction During Starting

Paper #:
  • 922197

Published:
  • 1992-10-01
Citation:
Marek, S. and Henein, N., "Transient Engine and Piston Friction During Starting," SAE Technical Paper 922197, 1992, https://doi.org/10.4271/922197.
Pages:
10
Abstract:
The instantaneous frictional torque (IFT) of the engine and the piston-ring assembly frictional force (PRAFF) were determined during cranking and starting of a direct injection single cylinder diesel engine. The measurements included the cylinder gas pressure, the instantaneous torque of the electric starter, the angular velocity of the crankshaft and the axial force on the connecting rod. The engine and piston friction were determined every crank angle degree for all the cycles from the time the starter was engaged to the time the engine reached the idling speed. The data was analyzed and a comparison was made between the friction in successive cycles.
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