Studies on the piston ring blow-by of the small type-air-cooled—internal combustion engine (II)

Abstract

From this experiment, amount of gas leakage was proved to be much influenced by various driving conditions.
It may be summarized as follows:
i) At the most suited pre-ignition point, amount of gas leakage was least. As the ignition point receded from it, amount of gas leakage increased.
ii) Gas leakage decreases as much as B. M. E. P. more diminishes under the certain r. p. m..
Gas leakage increases as much as r. p. m. decreases under the certain B. M. E. P..
iii) The least amount of gas leakage yields at ring set of normal number, the next is the 1st ring only, and the most is the 2nd ring only, at the lower speed within 2300r. p. m.
These tendencies reverced at the higher speed more than 2300r. p. m.