Patent ID: 7314030
Filing Date: 2008-01-01
Classification: F01L

Abstract:
1. A valve timing adjusting apparatus that adjusts valve timing of at least one of an intake valve and an exhaust valve of an internal combustion engine, which are opened and closed by a camshaft upon transmission of a torque from a crankshaft to the camshaft, the valve timing adjusting apparatus comprising: a first rotatable body that is rotated synchronously with one of the crankshaft and the camshaft and includes a first inner gear and at least one inlet hole, wherein the at least one inlet hole conducts lubricant fluid into an interior of the first rotatable body; a second rotatable body that is rotated synchronously with the other one of the crankshaft and the camshaft and includes a second inner gear, which is adjacent to the first inner gear and is positioned on one side of the first inner gear that is opposite from the at least one inlet hole in an axial direction; and a planet gear that includes a first outer gear and a second outer gear, wherein: the first outer gear and the second outer gear are meshed with and are driven together with the first inner gear and the second inner gear, respectively, to have a sun-and-planet motion, so that the planet gear changes a relative rotational phase between the first rotatable body and the second rotatable body; and an addendum circle of the second inner gear has a diameter, which is larger than that of a dedendum circle of the first inner gear.