| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric-hydraulic variable valve lift device. <P>SOLUTION: The electric-hydraulic variable valve lift device includes a housing, a drive cam, a pump piston to form a main chamber together with the housing and make reciprocating motions inside the housing with rotation of the drive cam to generate oil pressure in the main chamber, a pump piston resilient part provided to support the pump piston resiliently, an oil pressure controller having communication with the main chamber and regulating the oil pressure in the main chamber, a hydraulic piston installed in the housing slidably with the oil pressure of the main chamber and including a first body having a first diameter and a second body having a second diameter greater than the first and coupled with a valve, and a piston guide installed between the housing and the hydraulic piston in such a manner as guiding the hydraulic piston. <P>COPYRIGHT: (C)2012,JPO&INPIT |
