The invention relates to the hydraulic actuation and variable timed engine poppet valves. A conventional hydraulic pump pressurizes a rotor vane distributor, wherein hydraulic lines are appropriately timed and linked with a shuttle release valve which is linked with a hydraulic actuator/lifter apparatus....http://www.google.fr/patents/US5197419?utm_source=gb-gplus-shareBrevet US5197419 - Internal combustion engine hydraulic actuated and variable valve timing device
Internal combustion engine hydraulic actuated and variable valve timing device
