LUBRICATING OIL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINE

• Main Author: MORINAKA SHOICHIRO
• Format: Patent
• Language: English
• Published: 08.12.2011
• Subjects: 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; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide a lubricating oil supply device for an internal combustion engine, which reduce the frequency of insufficient state of supply amount of lubricating oil to a target portion caused by abnormal conditions of a valve characteristic changing device.SOLUTION: The lubricating oil supply device for the internal combustion engine 1 controls hydraulic pressure of the internal combustion engine 1 including the valve characteristic changing device 55 which changes valve timing VT of an intake valve 51 and includes a hydraulic control mechanism 30 which changes control pressure PC for controlling pressure in an oil supply path 21 for supplying the lubricating oil to the target portion of the internal combustion engine 1. The lubricating oil supply device maintains the control pressure PC at a second control pressure PC2 larger than a first control pressure PC1 based on the occurrence of the abnormal conditions of the valve characteristic device 55.