Connection rod for internal combustion engine

Details Connection rod for internal combustion engine Connection rod for internal combustion engine

2008-04-01

2008-04-01

Kim, Chong H (Department: 3682)

Machine element or mechanism

Elements

Pitmans and connecting rods

C029S525020, C411S411000, C411S916000

Reexamination Certificate

active

11125239

ABSTRACT:
An internal combustion engine connecting rod is designed with bolts having a minimum required strength. A strength safety factor Sfa is calculated based on an axial strength limit load FXof the bolt and the maximum load FBto be born by the bolt due to a piston inertia force (Sfa=FX/FB) acting on the connecting rod. A mating surface separation safety factor Sfb is calculated based on the tensile load (FB−FC) resulting from the piston inertia force and the load FEcarried by the bolts at a mating surface separation limit, i.e., the maximum bolt load FEat which the connecting rod main body and the cap remain in contact without separating (Sfb=FE/(FB−FC)). The mating surface separation safety factor Sfb of the connecting rod is set to be equal to or larger than the strength safety factor Sfa of the bolts (Sfb≧Sfa).

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