| 摘要 |
PURPOSE:To damp the pulsation of outlet pressure of a supercharger ample enough with a samll-sized surge tank and reduce a suction noise to the lowest possible extent, by installing a pre-chamber being smaller in displacement than the surge tank jointly in a suction passage between the surge tank and the supercharger. CONSTITUTION:When an engine E is operated, a supercharger 11 is driven by dint of output of the engine E. Likewise, when a bypass 18 is clased by a bypass valve 19, the air cleaned at an air cleaner 12 is pressurized by the supercharger 11 and turned into an air-fuel mixture by way of a pre-chamber 10, a surge tank 9 and a carburetor 8, then charged into a combustion chamber of the engine E. Stemming from an intermittent surpercharging action of the displacement type supercharger 11, if outlet pressure of the superchargre 11 becomes pulsated, this pulsatory motion is damped by the small displacement pre-chamber 10, while the residual pulsation run past the pre-chamber is, in turn, damped by the large displacement surge tank 9. |
