VALVE OPENING/CLOSING TIMING CONTROL DEVICE

摘要

A valve opening/closing timing control device is configured to be capable of appropriately setting a valve opening/closing timing within a short period of time from start-up of an internal combustion engine. An advancing chamber and a retarding chamber for relative phase control are formed between a driving rotating body that rotates synchronously with a drive shaft of an internal combustion engine and a driven rotating body that rotates integrally with a valve opening/closing camshaft, and a lock mechanism that locks the relative rotation phase at a locked phase is provided. During start-up of the internal combustion engine, a controller starts fluid-filling control for filling the advancing chamber and the retarding chamber with a fluid, and performs unlock control for releasing a locked state of the lock mechanism before filling of the fluid by the fluid-filling control is completed.

主权项

1. A valve opening/closing timing control device comprising:
a driving rotating body that rotates synchronously with a drive shaft of an internal combustion engine; a driven rotating body that is disposed coaxially with the driving rotating body and that rotates integrally with a camshaft for opening/closing a valve of the internal combustion engine; a lock mechanism that is capable of switching between a locked state in which a relative rotation phase of the driving rotating body and the driven rotating body is kept at a predetermined locked phase and an unlocked state; a fluid pressure chamber that is defined between the driving rotating body and the driven rotating body; a control valve mechanism that controls supply of a fluid to an advancing chamber and a retarding chamber, of the fluid pressure chamber, the supply to the advancing chamber causing the relative rotation phase to be displaced in an advance direction, and the supply to the retarding chamber causing the relative rotation phase to be displaced in a retard direction, and that controls supply of the fluid for controlling the lock mechanism; and a controller that controls the control valve mechanism, wherein during start-up of the internal combustion engine, the controller performs unlock control for releasing the locked state of the lock mechanism before filling of the advancing chamber and the retarding chamber with the fluid by fluid-filling control is completed.