| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve timing control apparatus of an internal combustion engine, the device capable of sufficiently ensuring pressure-receiving surface areas of vanes, while enlarging a relative-rotation angle. <P>SOLUTION: A phase-retard hydraulic chamber 11 and a phase-advance hydraulic chamber 12 are defined among four shoes 10a-10d formed in a housing body 10 and four vanes 16a-16d provided to the rotor 15 of a vane rotor 9 fixed to a camshaft. Between respective neighboring vanes of the rotor, small-diameter portions 15c, 15d and large-diameter portions 15e, 15f are provided, and the tip end of one shoe opposed to the outer peripheral surface of the small-diameter portions, is configured to protrude inward rather than the tip end of the other shoe opposed to the outer peripheral surface of the large-diameter portions. Lock pins 27-29 are provided in the large-diameter portions, whereas lock holes 24-26 with which the lock pins are engaged and from which the lock pins are disengaged, are provided in the inner face of a sprocket 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
