| 摘要 |
PROBLEM TO BE SOLVED: To downsize an electric motor in an internal combustion engine equipped with a roots-type supercharger connected to the electric motor via a planetary gear mechanism and connected to a crankshaft via the planetary gear mechanism and a power transmission mechanism.SOLUTION: Provided is an internal combustion engine 1 equipped with a roots-type supercharger 13 connected to an electric motor 36 via a planetary gear mechanism 35 and connected to a crankshaft 37 via the planetary gear mechanism 35 and a power transmission mechanism 50, -0.36≤(1+&rgr;)×&rgr;-0.45×Pb×Ve/Vsc≤0.36 being satisfied, where &rgr;denotes a change gear ratio of the planetary gear mechanism 35, &rgr;denotes a change gear ratio of the power transmission mechanism 50, Pb denotes a supercharging pressure, Ve denotes a displacement of the internal combustion engine 1, and Vsc denotes a discharge quantity of the supercharger 13 per rotation. |
