DISPOSITIVO VALVOLARE CON MECCANISMO D'APPOGGIO DELLA VALVOLA UTILIZ-ZABILE PER UN MOTORE A COMBUSTIONE INTERNA

A valve resting mechanism, for use with an internal combustion engine, which is capable of facilitating assembly of a valve lifter in the valve device. A valve device having a valve resting mechanism used for an internal combustion engine is configured such that a valve lifter having a lost motion mechanism is interposed between a cam and a stem of a poppet valve; the valve lifter is usually biased by a lifter spring in the direction in which the valve lifter is engaged with the cam; and a peripheral groove is provided for introducing hydraulic pressure for driving the lost motion mechanism is formed in an inner peripheral surface of a valve lifter hole for slidably guiding the valve lifter. In this valve device, the valve lifter, the lifter spring, and the peripheral groove are formed in such a manner that a lower end A of the valve lifter is positioned under a lower end of the peripheral groove in a state in which the lifter spring is freely extended.