ENGINE UNIT AND STRADDLED VEHICLE

An engine unit (EU) having its early-start ability further improved with suppression of deterioration in mountability to vehicle (1). The engine unit (EU) includes a four-stroke engine body (10), a starter motor (20), a plurality of detection object parts (38), a rotor position detection device (50)...

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Bibliographische Detailangaben
Hauptverfasser:	Takahiro NISHIKAWA, Haruyoshi HINO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES LIGHTING MECHANICAL ENGINEERING STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR STARTING OF COMBUSTION ENGINES TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	An engine unit (EU) having its early-start ability further improved with suppression of deterioration in mountability to vehicle (1). The engine unit (EU) includes a four-stroke engine body (10), a starter motor (20), a plurality of detection object parts (38), a rotor position detection device (50) having a detection-purpose winding (51), and an inverter (61) having a plurality of switching parts (611-616). A control device (CT): shifts from a start control mode for performing on/off-operation of the plurality of switching parts (611-616) at predefined timings to start forward rotation of the crankshaft (15), to an acceleration control mode for performing on/off-operation of the plurality of switching parts (611-616) at timings based on an electrical signal flowing in the detection-purpose winding (51) to accelerate forward rotation of the crankshaft (15); and in time periods during which the start control mode and the acceleration control mode are performed, causes rotation of the rotor (30) to follow a variation in a current flowing in the multi-phase stator windings (W) by controlling on/off-operation of the plurality of switching parts (611-616) based on both a timing of a variation corresponding to the forward end (38a) of the detection object part (38) and a timing of a variation corresponding to the rearward end (38b) of the detection object part (38) among variations in the electrical signal flowing in the detection-purpose winding (51).