Patent ID: 7673603
Filing Date: 2010-03-09
Classification: F01L

Abstract:
1. A valve timing control device for controlling opening/closing timings of first and second valves in response to a speed of an engine, comprising: a rotation member arranged to rotate in synchronization with a rotation of the engine; a first camshaft arranged to abut against the first valve and rotate together with the rotation member to open/close the first valve; a second camshaft arranged to abut against the second valve and rotate relative to the first camshaft, the second camshaft arranged to rotate together with the rotation member to open/close the second valve; and a phase changing mechanism arranged to change a phase of the second camshaft relative to the first camshaft between first and second phases; wherein the phase changing mechanism changes the phase of the second camshaft relative to the first camshaft from the first phase to the second phase at a first engine speed during an increase of the engine speed of the engine; wherein the phase changing mechanism changes the phase of the second camshaft relative to the first camshaft from the second phase to the first phase at a second engine speed lower than the first speed during a decrease of the engine speed of the engine; and the phase changing mechanism includes: