Determining start of injection and injection delay in a solenoid fuel injector for i.c. engines

The injection delay of a solenoid injector is determined by comparison of the time of generation of the command signal from the controller to the solenoid and the time that injection actually starts. The start of injection may be determined by sensing the position of the needle check eg using electr...

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Bibliographische Detailangaben
Hauptverfasser:	JOSHUA C RUEDIN, DARWIN CARRELL
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES 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 LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	The injection delay of a solenoid injector is determined by comparison of the time of generation of the command signal from the controller to the solenoid and the time that injection actually starts. The start of injection may be determined by sensing the position of the needle check eg using electrical contact between the check and the needle check stop or an eddy current sensor (602,fig.6). The invention is applicable to injectors of the hydraulically-actuated, electronically-controlled (HEUI) type in which the viscosity of the actuating fluid, eg engine lubricating oil, varies with engine temperature and oil type, leading to variations in delay before injection and accuracy of amounts of fuel delivered.