Use of a New Formula in the Analysis of Torsional Harmonic Excitations for IC Engines 911064

This paper gives a new theoretical formula which relates torsional harmonic coefficients due to gas pressure and mean indicated pressure (MIP) in a cylinder for a four-cycle internal-combustion engine. A practical example in a diesel engine hits been illustrated to verify its accuracy and utility. Based on the discovered formula, some characteristics of harmonic excitations and their relations with NIP are discussed. It is shown that the formula can be used to analyze the relationships between all harmonic coefficients and MIP, and to determine their values in the analysis of torsional vibrations.


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


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.