US Patent 7350438 Connection rod for internal combustion engine
Patent 7350438 was granted and assigned to NISSAN MOTOR CO.,LTD. on April, 2008 by the United States Patent and Trademark Office.
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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 FX of the bolt and the maximum load FB to 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 FE carried by the bolts at a mating surface separation limit, i.e., the maximum bolt load FE at 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).
US Patent 07350438 Connection rod for internal combustion engine US Patent 7350438 Connection rod for internal combustion engine
US Patent 07350438 Connection rod for internal combustion engine
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