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- Patents > 2011-02-24 > SECTION F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING > MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES > LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL-COMBUSTION ENGINES; CRANKCASE VENTILATING
HYDRAULIC CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
A hydraulic control device for an internal combustion engine having a pressure level switch mechanism that switches the pressure level of the oil supplied to components of the engine between a high pressure level and a low pressure level is provided. The hydraulic control device has a detecting section and a determining section. The determining section outputs a command signal instructing to switch the pressure level of the oil to the high pressure level to the pressure level switch mechanism and determines that the pressure level switch mechanism has a malfunction on condition that, after the command signal has been output, the pressure of the oil detected by the detecting section is smaller than a high-pressure-level switching malfunction determination value.
Filed on: 2009-03-31; Application Number: 12808298