Valve-gear or valve arrangements

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F01Engines F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

F01L1/00Valve-gear or valve arrangements

F01L1/02Valve drive F01L1/022Chain drive F01L1/024Belt drive F01L1/026Gear drive F01L1/04by means of cams, camshafts, cam discs, eccentrics or the like F01L1/042Cam discs F01L1/044Reciprocating cams F01L1/047Camshafts F01L1/053overhead type F01L1/0532the cams being directly in contact with the driven valve F01L1/06the cams, or the like, rotating at a higher speed than that corresponding to the valve cycle F01L1/08Shape of cams F01L1/10by means of crank-or eccentric-driven rods F01L1/12Transmitting gear between valve drive and valve F01L1/14Tappets Push rods F01L1/143for use with overhead camshafts F01L1/146Push-rods F01L1/16Silencing impact Reducing wear F01L1/18Rocking arms or levers F01L1/181Centre pivot rocking arms F01L1/182the rocking arm being pivoted about an individual fulcrum F01L1/183of the boat type F01L1/185Overhead end-pivot rocking arms F01L1/20Adjusting or compensating clearance F01L1/205by means of shims or the like F01L1/22automatically F01L1/24by fluid means F01L1/2405by means of a hydraulic adjusting device located between the cylinder head and rocker arm F01L1/2411by means of a hydraulic adjusting device located between the valve stem and rocker arm F01L1/2416by means of a hydraulic adjusting device attached to an articulated rocker F01L1/2422by means or a hydraulic adjusting device located between the push rod and rocker arm F01L1/245Hydraulic tappets F01L1/25between cam and valve stem F01L1/252for side-valve engines F01L1/255between cam and rocker arm F01L1/26characterised by the provision of two or more valves operated simultaneously by same transmitting-gear peculiar to machines or engines with more than two lift-valves per cylinder F01L1/262with valve stems disposed radially from a centre which is substantially the centre of curvature of the upper wall surface of a combustion chamber F01L1/265peculiar to machines or engines with three or more intake valves per cylinder F01L1/267with means for varying the timing or the lift of the valves F01L1/28characterised by the provision of coaxial valves characterised by the provision of valves co-operating with both intake and exhaust ports F01L1/285Coaxial intake and exhaust valves F01L1/30characterised by the provision of positively opened and closed valves F01L1/32characterised by the provision of means for rotating lift valves F01L1/34characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift F01L1/344changing the angular relationship between crankshaft and camshaft F01L1/34403using helically teethed sleeve or gear moving axially between crankshaft and camshaft F01L1/34406the helically teethed sleeve being located in the camshaft driving pulley F01L1/34409by torque-responsive means F01L1/34413using composite camshafts F01L1/34416using twisted cams F01L1/3442using hydraulic chambers with variable volume to transmit the rotating force F01L1/348by means acting on timing belts or chains F01L1/352using bevel or epicyclic gear F01L1/356making the angular relationship oscillate F01L1/36peculiar to machines or engines of specific type other than four-stroke cycle F01L1/38for engines with other than four-stroke cycle F01L1/40for engines with scavenging charge near top dead centre position F01L1/42for machines or engines characterised by cylinder arrangements F01L1/44Multiple-valve gear or arrangements, not provided for in preceding subgroups F01L1/443comprising a lift valve and at least one rotary valve F01L1/446comprising a lift valve and at least one reed valve F01L1/46Component parts, details, or accessories, not provided for in preceding subgroups F01L1/462Valve return spring arrangements F01L1/465Pneumatic arrangements