Patent ID: 8485151
Filing Date: 2013-07-16
Classification: F01L

Abstract:
1. A valve timing adjusting device for adjusting valve timing of an actuated valve, which is opened and closed by a camshaft using torque transmitted from a crankshaft, in an internal combustion engine, the valve timing adjusting device comprising: a housing defining a fluid chamber inside; a magnetic viscous fluid that is sealed in the fluid chamber and that has viscosity changing in accordance with a magnetic flux passing through the fluid; a viscosity controlling means for variably controlling the viscosity of the magnetic viscous fluid by passing the magnetic flux through the magnetic viscous fluid in the fluid chamber; a brake rotor that penetrates through the housing between an inside and an outside of the housing and that rotates in a constant direction due to an operation of the internal combustion engine, wherein brake torque corresponding to the viscosity of the magnetic viscous fluid in the fluid chamber is inputted to the brake rotor through contact between the brake rotor and the magnetic viscous fluid; a phase adjusting mechanism that is linked with the brake rotor outside the housing and that adjusts a relative phase between the crankshaft and the camshaft in accordance with the brake torque inputted to the brake rotor; and a sealing structure for sealing a clearance between the housing and the brake rotor, wherein the sealing structure has: the magnetic sleeve section has: