PULSATION ABSORBING DEVICE FOR HYDRAULIC CIRCUIT AND VALVE TRAIN DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a pulsation absorbing device for a hydraulic circuit enhancing durability of a flexible membrane member, and to provide a valve train device for an internal combustion engine.

SOLUTION: This pulsation absorbing device for the hydraulic circuit includes: an oil chamber connecting to an oil passage of a hydraulic circuit; an air chamber containing gas; a plate-shaped flexible membrane member separating the air chamber and the oil chamber; and a flexible membrane deformation suppression member internally existing in the air chamber and in contact with the flexible membrane member to suppress the deformation of the flexible membrane member. This valve train device for an internal combustion engine includes: a valve driving piston capable of driving an exhaust valve or an intake valve of an internal combustion engine; and an oil passage of the hydraulic circuit connecting to the inside of a valve driving cylinder where the valve driving piston is reciprocated. The pulsation of the oil passage of the hydraulic circuit connecting to the inside of the valve driving cylinder is absorbed by the pulsation absorbing device for the hydraulic circuit.

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