1969-02-01

Similarity Laws for Four-Stroke Engines and Numerical Results for the Intake Process Calculated with the Method of Characteristics 690466

The theoretical investigation of the charging process results in 10 dimensionless parameters which specify the behavior of the unsteady process. The calculation of the volumetric efficiency and the oscillation phenomena in the intake system are therefore valid for all engine sizes. The influence of each parameter and the dependence on engine speed, intake pipe length, stroke-bore ratio, and the ratio of the intake pipe diameter to cylinder bore diameter are shown and discussed.

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