Diagnostic system for variable valve timing control system

A fuel diluting quantity is estimated based on an alcohol concentration of the fuel. A response-deterioration determination value is corrected according to the estimated fuel diluting quantity. The response-deterioration determination value can be properly established even though the responsiveness...

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Bibliographische Detailangaben
1. Verfasser:	KATSURAHARA HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CRANKCASE VENTILATING CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL 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 LUBRICATING INTERNAL COMBUSTION ENGINES LUBRICATING OF MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES IN GENERAL MEASURING MECHANICAL ENGINEERING PHYSICS STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	A fuel diluting quantity is estimated based on an alcohol concentration of the fuel. A response-deterioration determination value is corrected according to the estimated fuel diluting quantity. The response-deterioration determination value can be properly established even though the responsiveness of the variable valve timing controller is varied due to a variation in viscosity of the lubricant. Thereby, even when the responsiveness of the variable valve timing controller is varied (deteriorated) due to an increase in the fuel diluting quantity, it can be avoided that the computer determines that the variable valve timing controller has a defect.