Power unit for a vehicle, and vehicle including same

A vehicle comprising a body frame and a power unit, operatively attached to the body frame and comprising:

• an engine having a crankshaft rotatably supported on a crankcase, a transmission adapted to transmit rotational power from the crankshaft to a drive axle with speed change, the transmission accommodated in the crankcase and having an input shaft rotatably supported on the crankcase, and a hydraulic clutch which is configured to be selectively engaged and disengaged to effect and interrupt transmission of power between the crankshaft and the input shaft, the hydraulic clutch disposed coaxially with the input shaft, wherein:
• a clutch cover covering the hydraulic clutch is connected to the crankcase, a clutch actuator, which is adapted to control switching of engaging and disengaging operations of the hydraulic clutch, and an actuator cover which covers the clutch actuator in a liquid-tight manner are mounted to an outer surface of the clutch cover;
• and an oil temperature sensor having a detecting portion for detecting a temperature of an oil accumulated in an oil chamber formed between the clutch cover and the actuator cover, is mounted to the actuator cover.