In this investigation, a pushrod operated valve train is simulated by mathematical models of two, three, four, ten, and fifteen degress of freedom. A number of important features are included in the simulation, such as tappet clearance, linkage separation, valve bounce, and valve spring surge. Solutions of the response to cam lift function under specified running conditions, are obtained by numerical means with a digital computer. These are compared with experimental records of pushrod load and valve displacement on a running engine. The use of similar programs to predict valve gear performance is justified by the excellent agreement obtained.
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References
1.
JehleSpillerT. H.‘Idiosyncrasies of valve mechanisms and their causes’, S.A.E. Journal, February 1929, 24.
