Valve timing adjusting apparatus of internal combustion engine

摘要

A valve timing adjusting apparatus of an internal combustion engine in which number of lock pins is decreased is provided. The valve timing adjusting apparatus of an internal combustion engine comprises: a housing which is mounted on a camshaft 2 of the internal combustion engine so as to be relatively rotatable, has a plurality of fluid chambers partitioned by shoes inside, and is driven synchronously by a crankshaft of the internal combustion engine; a rotor which is mounted on the camshaft 2 and has a plurality of vanes for partitioning the plurality of fluid chambers into advancing chambers and/or retarding chambers; a lock pin which is stored in the rotor and is urged so as to be movable toward the housing; and first and second engaging portions which are formed on the housing at different positions of relative rotation of the rotor with respect to the housing and respectively face the lock pin; in which the rotor is regulated to be at the different positions of relative rotation with respect to the housing by engaging the same lock pin with the first and second engaging portions respectively.