(57) [PROBLEM]
To provide a straddled vehicle that is able to shorten a time period until completion
of engine start after an engine start instruction.
[SOLUTION]
An engine unit includes a single-cylinder engine, a compression release mechanism,
a drive wheel, a permanent magnet type motor, a battery, an inverter including a plurality
of switching parts, and a control device. The control device controls the switching
parts in such a manner that, upon reception of a start instruction for starting the
single-cylinder engine, the permanent magnet type motor moves a piston so as to operate
the compression release mechanism in a compression stroke of a first combustion cycle,
and then the permanent magnet type motor applies a force to the piston via a crankshaft
such that the rotation speed of the crankshaft in a second combustion cycle exceeds
the pressure-reduction upper limit speed for the compression release mechanism, so
that the piston is moved without operating the compression release mechanism in a
compression stroke of the second combustion cycle, thus assisting compression of the
mixed gas.
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