Browse Publications Technical Papers 2019-01-0767

Design and Modelling of Single Cylinder 4 Stroke Gasoline Engine Crankshaft 2019-01-0767

The crankshaft translates the reciprocatory motion of the piston into rotary motion. A flywheel is generally connected to the crankshaft to reduce the vibrating characteristic of four stroke cycle. Counterweights are added for each reciprocating piston to provide engine balance while operating. Gasoline engines have curtailed compression ratio therefore shorter stoke length as a deduction have higher RPM in comparison to diesel counterpart. A crankshaft is subjected to enormous stresses, potentially equivalent of several tones of force. Failure of the crankshaft is predominantly due to violent vibrations, insufficient lubrication, excessively pressurized cylinder. This research aims to examine the stress subjected to acute points on a crankshaft. Three dimension model of 4 stroke single cylinder engine crankshaft is modeled using SolidWorks v18. End conditions were applied taking into consideration the engine mountings of the crankshaft. Stresses were applied to crankpin to replicate the forces of a running engine. Twisting moment causes Shear stresses; bending moment are determinant of the tensile and compressive stresses. This research was conducted for two different materials Stainless steel and Epoxy carbon fiber 230GPa woven Prepeg. Finite element analysis (FEA) was conducted and results for Shear stress and von-misses stresses induced in crankshaft are drawn using ANSYS v18.1 for the two materials. For validation of the model, the theoretical results for von-misses and shear stress are contrasted with the analysis result obtained. The result has been scrutinized to find out the viability of replacing stainless steel with carbon fiber as a manufacturing material for the high-performance automotive crankshaft.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Optimization Approach to Passive Engine Mounting System for Reducing Automotive Vibrations


View Details


Efficient Engine Models Using Recursive Formulation of Multibody Dynamics


View Details


Methodology for Automotive Crankshaft Design using Analytical and Flexible Models


View Details