Drive system and automobile

摘要

A counterweight 40 attached to a crankshaft 38 has a projection 42 , which is aligned with and faces an electromagnet 44 attached to a crank casing 46 when the crankshaft 38 is at a preset rotational position of ensuring good startability of an engine 22 . Engine stop control starts a power supply to the electromagnet 44 to attract the projection 42 of the counterweight 40 at a timing when the projection 42 of the counterweight 40 is practically aligned with the electromagnet 44 , on the condition that the revolution speed of the crankshaft 38 is lowered to or below a preset level immediately before a full stop of rotation of the crankshaft 38 . This engine stop control stops the rotation of the crankshaft 38 and desirably holds the crankshaft 38 at the preset rotational position of ensuring good startability of the engine 22.