ELECTRONIC CONTROL DEVICE

PROBLEM TO BE SOLVED: To achieve update of data stored in electrically-rewritable nonvolatile memory of an actuator provided in an internal combustion engine, by restraining the nonvolatile memory from becoming short-lived.SOLUTION: When an ignition switch is turned off, a control unit of an engine...

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Bibliographische Detailangaben
Hauptverfasser:	YUKAWA HOSHO, SUGIMOTO FUMITAKA, KANEKO MASAYUKI, YOSHIDA TOMOSHI, HIOKI TOSHIKAZU
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 PERFORMING OPERATIONS 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 TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To achieve update of data stored in electrically-rewritable nonvolatile memory of an actuator provided in an internal combustion engine, by restraining the nonvolatile memory from becoming short-lived.SOLUTION: When an ignition switch is turned off, a control unit of an engine ECU obtains a temperature measurement value of a fuel temperature sensor provided in an injector (S220), determines whether the temperature measurement value is a threshold or below (S230), and updates data of an EEPROM 19 provided in the injector (S295), in the case where the temperature measurement value is a threshold or below (S230: Yes). Meanwhile, the control unit of the engine ECU suspends this data update (S240) in the case where the temperature measurement value exceeds the threshold, and performs setting of a soak timer (S290). At a restart using the soak timer, the control unit of the engine ECU obtains the temperature measurement value of the fuel temperature sensor again (S220), and updates the data of the EEPROM 19 (S295) in the case where the temperature measurement value is the threshold or below (S230: Yes).