ENGINE WITH SUPERCHARGER

摘要

A supercharger-equipped combustion engine includes a crankshaft extending in a widthwise direction of a vehicle supported by a crankcase and a supercharger disposed above the crankcase. Power from the crankshaft is transmitted through a supercharger transmission to the supercharger. A crankcase body has an opening formed to be opened at the right side in the widthwise direction, and at least a part of the opening is covered with a holder detachably mounted on the crankcase body. The supercharger transmission includes input and output shafts extending in the widthwise direction of the vehicle, and the input and output shafts are rotatably supported at first end portions thereof at the right side by first bearing portions formed in the holder and are rotatably supported at second end portions thereof at the left side by second bearing portions formed in a side wall of the crankcase body.

主权项

1. A supercharger-equipped combustion engine mounted on a vehicle and comprising:
an engine rotary shaft extending in a widthwise direction of the vehicle; a crankcase supporting the engine rotary shaft and including a crankcase body having an opening formed so as to be opened at one side in the widthwise direction of the vehicle; a supercharger disposed above the crankcase and configured to pressurize and then discharge intake air; a power transmission mechanism configured to transmit power from the engine rotary shaft to the supercharger; and a holder covering at least a part of the opening of the crankcase body from the one side in the widthwise direction of the vehicle and detachably mounted on the crankcase body, wherein the power transmission mechanism includes a power transmission shaft unit extending in the widthwise direction of the vehicle, the power transmission shaft unit is supported at a first end portion thereof at the one side and at a second end portion thereof at the other side in the widthwise direction of the vehicle, a first bearing portion formed in the holder rotatably supports the first end portion of the power transmission shaft unit, and a second bearing portion formed in a side wall of the crankcase rotatably supports the second end portion of the power transmission shaft unit.