FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: proposed device comprises at least one opening cam and two symmetrical closing cams for each valve arranged at sides of opening cam on engine camshaft. Movable sleeve is mechanically coupled with valve. Guide members of said sleeve are made in form of two vertical posts interconnected by crossmember with lock. Upper and lower cross elements of sleeve are provided, respectively, with upper and lower profiled cam projections periodically interacting with working surfaces of opening and closing cams. Lock is furnished with tips for locking sleeve in extreme upper position when valve is closed. Closing cam is provided with wedge-type elements for opening and closing lock tips. Mechanical coupling of sleeve with valve comprises sealing springy element installed in coupling at preloading. Invention discloses design peculiarities of surfaces of opening and closing cams. Invention provides reduction of fuel consumption, increase of torque at engine low speed. EFFECT: increased efficiency and service life of valve actuating mechanism units. 8 cl, 6 dwg
