Engine speed controller for working machine

An engine speed controller for a working machine having no governor mechanism in which the speed can be maintained stably regardless of a variation in load without regulating the throttle opening and the speed can be controlled to bring out the engine capacity to the maximum. Since the engine (1) ha...

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Bibliographische Detailangaben
1. Verfasser:	TAMAMOTO RIYUUHEI,YONEYAMA TADAYUKI,YAMAMURA MAKOTO,KANAI MITSUYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	An engine speed controller for a working machine having no governor mechanism in which the speed can be maintained stably regardless of a variation in load without regulating the throttle opening and the speed can be controlled to bring out the engine capacity to the maximum. Since the engine (1) has no governor mechanism, the worker controls the engine speed by regulating the throttle opening. An ignition timing map (30) has a map where the ignition timing (lead angle) is set as a function of the engine speed. A CPU (27) searches the ignition timing map (30) according to the engine speed detected by a speed sensor (29) and determines an ignition timing. The map (30) is set to delay the ignition timing behind the previous timing when the engine speed is over a limit engine speed. When the engine speed is, e.g., 7000 rpm or more, delay angle control is performed. When the engine speed is below 7000 rpm, ignition timing is controlled in correspondence with the engine speed.