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1. Definition of acyclism
The acyclism of an internal combustion engine is characterised by time variations in movement, speed or angular acceleration of its crankshaft , due to the forces being applied to piston-connecting rod-crank systems.
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Three characteristics
Depending on the circumstances, acyclism is quantified according to one of these three characteristics.
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Variations in angular positions
Which may make it possible to estimate the deformations and constraints imposed on a part stressed by the acyclisms of the crankshaft.
In addition, it may be necessary to consider angular displacements...
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Definition of acyclism
Operation of a single-cylinder
Sources bibliographiques
Norms and standards
- ISO – Reciprocating internal combustion engines – Designation of the direction of rotation and of cylinders and valves in cylinder heads, and definition of right-hand and left-hand in-line engines and locations on an engine. - NF ISO 1204 - 1999
- ISO – Reciprocating internal combustion engines – Performance – Part 3 : Test measurements. - NF ISO 3046-3 - 2006
- ISO – Reciprocating internal combustion engines...
Statistical and economic data
1 Directory
Comatec, Heig-Vd, 1 route de Cheseaux, 1400 Yverdon-les-bains, Switzerland. Dynamic analysis and acyclism.
2 Appendix : Piston kinematics
The movement of the piston in a theoretical cylinder without play and hence without tipping of the piston is controlled by the movement of the connecting rod. Now the movement of the latter may be broken down into a...
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