ELECTROHYDRAULIC ACTUATOR TO MAKE ENGINE VALVE UN-OPERATED, FORMING METHOD OF ACTUATOR AND METHOD TO MAKE VALVE IN COMBUSTION CHAMBER UN-OPERATED

摘要

PPROBLEM TO BE SOLVED: To provide an electrohydraulic actuator capable of restraining a plurality of valves by using the single solenoid operating type hydraulic actuator, simple, inexpensive and capable of making the engine valve un-operated. PSOLUTION: This is an assembly of the electrohydraulic actuator 10 having a plurality of hydraulic pistons 52, 54. 56 free to control by a single solenoid operating type closed and vent valve. The hydraulic pistons 52, 54, 56 are furnished with arms 76, 78, 80 by mounting them on them and make contact with a release latch 106 of a valve system of an engine to make the valve of the combustion chamber of the selected engine. The assembly of the electrohydraulic actuator 10 is provided with a closed and vent valve port 34 upward in the vertical direction of the hydraulic piston bores 46, 48, 50. Additionally, air is purged with a bleeding current by providing a bleed orifice to flow the bleed current to a valve chamber of the closed and vent valve from the hydraulic piston bores 46, 48, 50. Furthermore, the surface of an engine cam is lubricated by dripping of a dead load from the vent valve port 34. PCOPYRIGHT: (C)2004,JPO