Patent ID: 8640664

Claim:
An engine that is provided with a variable valve device, comprising: a hydraulic pressure lash adjuster (HLA) pivotally supporting an end of a swing arm, wherein the hydraulic pressure lash adjuster selectively lifts the end of the swing arm; and a valve supporting the other end of the swing arm; a cam shaft selectively pushing the swing arm; wherein the hydraulic pressure lash adjuster comprises: a housing which is fixed to the engine and having an oil supply hole; a plunger of which one end portion thereof is slidably inserted into the inside of the housing, the other end portion of which extends outwards and supports the end of the swing arm by selectively moving upwards or downwards in a length direction of the housing; a stopper pin slidably mounted in a chamber formed inside the plunger so as to selectively lock the plunger to the housing such that the plunger cannot move in the housing; a hydraulic pressure supply portion that selectively supplies one side of the stopper pin with a hydraulic pressure to move the stopper pin toward the housing, wherein the one side of the stopper pin is continuously disposed inside the chamber; a lost motion spring that is disposed in a lower chamber of the housing to elastically support the plunger to the outside; an oil supply line formed inside the plunger and continuously fluid-connected with the oil supply hole of the housing to receive the hydraulic pressure from the hydraulic pressure supply portion; and an oil bypass passage continuously connecting the oil supply line and the lower chamber together.