초록 ▼

Internal combustion engine variable valve lifter system inserted between the contact surface of a conventional in use mechanical or hydraulic type valve lifter, with the respective cam of the camshaft, through which, with the variation of hydraulic means pressure applied on, the inside the formed ch

Internal combustion engine variable valve lifter system inserted between the contact surface of a conventional in use mechanical or hydraulic type valve lifter, with the respective cam of the camshaft, through which, with the variation of hydraulic means pressure applied on, the inside the formed chamber, located proper elastic balls, is achieved the gradual variation of the respective valve operational characteristics (which variation concerning valves in a cylinder, could be executed in a successive manner) in the medium and lower engine RPM's range.

대표청구항 ▼

[ What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:] [1.] A variable action valve lifter system comprising:an internal combustion engine camshaft having at least one cam;a valve having a stem and coordinated to said cam;a spring coordinated to

[ What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:] [1.] A variable action valve lifter system comprising:an internal combustion engine camshaft having at least one cam;a valve having a stem and coordinated to said cam;a spring coordinated to said valve and acting on said valve;a valve lifter cylinder with a contact bottom part being in continuous contact with said cam;an inner disk inserted in the valve lifter cylinder and being in contact with an end of the stem of said valve and forming a chamber together with the valve lifter cylinder with the contact bottom part;elastic means formed by balls inserted in the chamber and squeezed between the contact bottom part and the inner disk, wherein the valve lifter cylinder, the inner disk, and the elastic means are placed in a cylindrical borehole, wherein said valve is being opened during rotation of the camshaft when a sum of a force exerted by distortion of the elastic means and a force of hydraulic pressure of a hydraulic medium present in the chamber and acting on the contact bottom part exceed a force of said spring, and wherein a valve lift of said valve depends on a degree of distortion of the elastic means and on said hydraulic pressure of the hydraulic medium supplied to the chamber, and wherein a characteristic of an angle of rotation of the camshaft-dependent valve lift is changed by modifying the hydraulic pressure and the elasticity of the elastic means.