HYDRAULIC PUSHER Russian patent published in 2001 - IPC

FIELD: engine manufacture. SUBSTANCE: invention can be employed in mechanisms of gas distribution for automatic compensation of expansion clearances in valve. Hydraulic pusher is made of case 1 with wall 2 and bottom 3 that houses cylindrical bushing 4 forming oil-feeding conduit 7 together with wall 2. Bushing transfers to funnel-shaped ring washer 5 near bottom 3 forming space 9 of stock of oil and conjugated in bottom part with guiding cylindrical tube 6. Hydraulic compensator composed of cup 11 and piston 12 with central space 13 limiting high-pressure chamber 15 is placed in hole of cylindrical tube 6. Bottom 3 of case is fitted with washer 22 with central hole 23 opening into piston space 13 and with flange 24 over periphery. Radial groove 25 is made in internal surface of bottom 3. Its peripheral part is oriented above feeding conduit 7 and its central part is oriented above hole of 23 of washer 22. Fixed anchoring of guiding bushing is implemented by its interference fit and expansion into bottom part of case. EFFECT: provision for operation of mechanism under condition of start-up of engine under large inclination angle of pusher thanks to formation of closed cycle of circulation of oil through piston space. 2 cl, 5 dwg