F01L1/00	7	Valve-gear or valve arrangements, e.g. lift-valve gear (lift-valve and valve-seat assemblies per seF01L3/00; slide-valve gear F01L5/00; actuated non-mechanically F01L9/00; valve arrangements in working piston or piston rod F01L11/00; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations F01L13/00)	F01L1/00	F01L1/00		501
F01L1/02	8	Valve drive (transmitting-gear between valve drive and valve F01L1/12)	F01L1/02	F01L1/02		1552
F01L1/022	9	{Chain drive}	F01L1/02	F01L1/02		1656
F01L1/024	9	{Belt drive}	F01L1/02	F01L1/02		1590
F01L1/026	9	{Gear drive}	F01L1/02	F01L1/02		806
F01L2001/028	9	{Pre-assembled timing arrangement, e.g. located in a cassette}	F01L1/02	F01L1/02		54
F01L1/04	9	by means of cams, camshafts, cam discs, eccentrics or the like (F01L1/10 takes precedence)	F01L1/04	F01L1/04		630
F01L1/042	10	{Cam discs}	F01L1/04	F01L1/04		80
F01L1/044	10	{Reciprocating cams}	F01L1/04	F01L1/04		30
F01L1/047	10	Camshafts	F01L1/047	F01L1/047		3302
F01L2001/0471	11	{Assembled camshafts}	F01L1/047	F01L1/047		325
F01L2001/0473	12	{Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod}	F01L1/047	F01L1/047		871
F01L2001/0475	11	{Hollow camshafts}	F01L1/047	F01L1/047		582
F01L2001/0476	11	{Camshaft bearings}	F01L1/047	F01L1/047		1054
F01L2001/0478	11	{Torque pulse compensated camshafts}	F01L1/047	F01L1/047		49
F01L1/053	11	overhead type	F01L1/053	F01L1/053		2204
F01L1/0532	12	{the cams being directly in contact with the driven valve}	F01L1/053	F01L1/053		575
F01L2001/0535	12	{Single overhead camshafts [SOHC]}	F01L1/053	F01L1/053		386
F01L2001/0537	12	{Double overhead camshafts [DOHC]}	F01L1/053	F01L1/053		1803
F01L2001/054	11	{Camshafts in cylinder block}	F01L1/047	F01L1/054		171
F01L1/06	10	the cams, or the like, rotating at a higher speed than that corresponding to the valve cycle, e.g. operating fourstroke engine valves directly from crankshaft	F01L1/06	F01L1/06		127
F01L1/08	10	Shape of cams	F01L1/08	F01L1/08		1741
F01L1/10	9	by means of crank-or eccentric-driven rods	F01L1/10	F01L1/10		143
F01L1/12	8	Transmitting gear between valve drive and valve (simultaneously operating two or more valves F01L1/26)	F01L1/12	F01L1/12		1326
F01L1/14	9	Tappets {(hydraulic tappets for automatically adjusting or compensating clearance F01L1/24)}; Push rods	F01L1/14	F01L1/14		1224
F01L1/143	10	{for use with overhead camshafts}	F01L1/14	F01L1/14		1190
F01L1/146	10	{Push-rods}	F01L1/14	F01L1/14		1132
F01L1/16	10	Silencing impact; Reducing wear	F01L1/16	F01L1/16		754
F01L1/18	9	Rocking arms or levers	F01L1/18	F01L1/18		2141
F01L1/181	10	{Centre pivot rocking arms}	F01L1/18	F01L1/18		2189
F01L1/182	11	{the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft}	F01L1/18	F01L1/18		346
F01L1/183	12	{of the boat type}	F01L1/18	F01L1/18		177
F01L1/185	10	{Overhead end-pivot rocking arms}	F01L1/18	F01L1/18		2443
F01L2001/186	10	{Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison}	F01L1/18	F01L1/18		990
F01L2001/187	10	{Clips, e.g. for retaining rocker arm on pivot}	F01L1/18	F01L1/18		213
F01L2001/188	10	{Fulcrums at upper surface}	F01L1/18	F01L1/18		149
F01L1/20	8	Adjusting or compensating clearance	F01L1/20	F01L1/20		935
F01L1/205	9	{by means of shims or the like}	F01L1/20	F01L1/20		203
F01L1/22	9	automatically, e.g. mechanically	F01L1/22	F01L1/22		570
F01L1/24	10	by fluid means, e.g. hydraulically	F01L1/24	F01L1/24		744
F01L1/2405	11	{by means of a hydraulic adjusting device located between the cylinder head and rocker arm}	F01L1/24	F01L1/24		1352
F01L1/2411	11	{by means of a hydraulic adjusting device located between the valve stem and rocker arm}	F01L1/24	F01L1/24		338
F01L1/2416	11	{by means of a hydraulic adjusting device attached to an articulated rocker}	F01L1/24	F01L1/24		171
F01L1/2422	11	{by means or a hydraulic adjusting device located between the push rod and rocker arm}	F01L1/24	F01L1/24		133
F01L2001/2427	11	{by means of an hydraulic adjusting device located between cam and push rod}	F01L1/24	F01L1/24		83
F01L2001/2433	11	{Self contained, e.g. sealed hydraulic lash adjusters}	F01L1/24	F01L1/24		75
F01L2001/2438	11	{with means permitting forced opening of check valve}	F01L1/24	F01L1/24		25
F01L2001/2444	11	{Details relating to the hydraulic feeding circuit, e.g. lifter oil manifold assembly [LOMA]}	F01L1/24	F01L1/24		156
F01L1/245	11	Hydraulic tappets	F01L1/245	F01L1/245		737
F01L1/25	12	between cam and valve stem	F01L1/25	F01L1/25		513
F01L1/252	13	{for side-valve engines}	F01L1/25	F01L1/25		152
F01L1/255	12	between cam and rocker arm	F01L1/255	F01L1/255		99
F01L2001/256	12	{between cam and push rod}	F01L1/245	F01L1/25		55
F01L1/26	8	characterised 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 (with coaxial valves F01L1/28)	F01L1/26	F01L1/26		1582
F01L1/262	9	{with valve stems disposed radially from a centre which is substantially the centre of curvature of the upper wall surface of a combustion chamber (F01L1/265 takes precedence)}	F01L1/26	F01L1/26		85
F01L1/265	9	{peculiar to machines or engines with three or more intake valves per cylinder}	F01L1/26	F01L1/26		221
F01L1/267	9	{with means for varying the timing or the lift of the valves}	F01L1/26	F01L1/26		1324
F01L1/28	8	characterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports	F01L1/28	F01L1/28		559
F01L1/285	9	{Coaxial intake and exhaust valves}	F01L1/28	F01L1/28		151
F01L1/30	8	characterised by the provision of positively opened and closed valves, i.e. desmodromic valves	F01L1/30	F01L1/30		594
F01L1/32	8	characterised by the provision of means for rotating lift valves, e.g. to diminish wear	F01L1/32	F01L1/32		525
F01L1/34	8	characterised 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}	F01L1/34	F01L1/34		2249
F01L1/344	9	changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear	F01L1/344	F01L1/344		1979
F01L1/34403	10	{using helically teethed sleeve or gear moving axially between crankshaft and camshaft}	F01L1/344	F01L1/344		206
F01L1/34406	11	{the helically teethed sleeve being located in the camshaft driving pulley}	F01L1/344	F01L1/344		436
F01L1/34409	10	{by torque-responsive means}	F01L1/344	F01L1/344		328
F01L1/34413	10	{using composite camshafts, e.g. with cams being able to move relative to the camshaft}	F01L1/344	F01L1/344		248
F01L1/34416	10	{using twisted cams}	F01L1/344	F01L1/344		27
F01L1/3442	10	{using hydraulic chambers with variable volume to transmit the rotating force}	F01L1/344	F01L1/344		3376
F01L2001/34423	11	{Details relating to the hydraulic feeding circuit}	F01L1/344	F01L1/344		400
F01L2001/34426	12	{Oil control valves}	F01L1/344	F01L1/344		1172
F01L2001/3443	13	{Solenoid driven oil control valves}	F01L1/344	F01L1/344		861
F01L2001/34433	13	{Location oil control valves}	F01L1/344	F01L1/344		818
F01L2001/34436	12	{Features or method for avoiding malfunction due to foreign matters in oil}	F01L1/344	F01L1/344		171
F01L2001/3444	13	{Oil filters}	F01L1/344	F01L1/344		252
F01L2001/34443	13	{Cleaning control of oil control valves}	F01L1/344	F01L1/344		30
F01L2001/34446	12	{Fluid accumulators for the feeding circuit}	F01L1/344	F01L1/344		484
F01L2001/3445	11	{Details relating to the hydraulic means for changing the angular relationship}	F01L1/344	F01L1/344		102
F01L2001/34453	12	{Locking means between driving and driven members}	F01L1/344	F01L1/344		436
F01L2001/34456	13	{Locking in only one position}	F01L1/344	F01L1/344		166
F01L2001/34459	13	{Locking in multiple positions}	F01L1/344	F01L1/344		170
F01L2001/34463	13	{Locking position intermediate between most retarded and most advanced positions}	F01L1/344	F01L1/344		256
F01L2001/34466	13	{with multiple locking devices}	F01L1/344	F01L1/344		273
F01L2001/34469	13	{Lock movement parallel to camshaft axis}	F01L1/344	F01L1/344		651
F01L2001/34473	13	{Lock movement perpendicular to camshaft axis}	F01L1/344	F01L1/344		161
F01L2001/34476	13	{Restrict range locking means}	F01L1/344	F01L1/344		122
F01L2001/34479	12	{Sealing of phaser devices}	F01L1/344	F01L1/344		542
F01L2001/34483	12	{Phaser return springs}	F01L1/344	F01L1/344		803
F01L2001/34486	10	{Location and number of the means for changing the angular relationship}	F01L1/344	F01L1/344		59
F01L2001/34489	11	{Two phasers on one camshaft}	F01L1/344	F01L1/344		63
F01L2001/34493	11	{Dual independent phasing system [DIPS]}	F01L1/344	F01L1/344		85
F01L2001/34496	11	{Two phasers on different camshafts}	F01L1/344	F01L1/344		235
F01L1/348	10	by means acting on timing belts or chains	F01L1/348	F01L1/348		386
F01L1/352	10	using bevel or epicyclic gear	F01L1/352	F01L1/352		1169
F01L2001/3521	11	{Harmonic drive of flexspline type}	F01L1/352	F01L1/352		285
F01L2001/3522	11	{with electromagnetic brake}	F01L1/352	F01L1/352		139
F01L1/356	10	making the angular relationship oscillate {, e.g. non-homokinetic drive}	F01L1/356	F01L1/356		364
F01L1/36	8	peculiar to machines or engines of specific type other than four-stroke cycle	F01L1/36	F01L1/36		55
F01L1/38	9	for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence)	F01L1/38	F01L1/38		293
F01L1/40	9	for engines with scavenging charge near top dead centre position, e.g. by overlapping inlet and exhaust time	F01L1/40	F01L1/40		38
F01L1/42	9	for machines or engines characterised by cylinder arrangements, e.g. star or fan	F01L1/42	F01L1/42		194
F01L1/44	8	Multiple-valve gear or arrangements, not provided for in preceding subgroups, e.g. with lift and different valves	F01L1/44	F01L1/44		174
F01L1/443	9	{comprising a lift valve and at least one rotary valve}	F01L1/44	F01L1/44		140
F01L1/446	9	{comprising a lift valve and at least one reed valve}	F01L1/44	F01L1/44		48
F01L1/46	8	Component parts, details, or accessories, not provided for in preceding subgroups	F01L1/46	F01L1/46		1825
F01L1/462	9	{Valve return spring arrangements}	F01L1/46	F01L1/46		692
F01L1/465	10	{Pneumatic arrangements}	F01L1/46	F01L1/46		160
F01L2001/467	9	{Lost motion springs}	F01L1/46	F01L1/46		337
F01L3/00	7	Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof	F01L3/00	F01L3/00		349
F01L3/02	8	Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials	F01L3/02	F01L3/02		1081
F01L3/04	9	Coated valve members or valve-seats	F01L3/04	F01L3/04		525
F01L3/06	8	Valve members or valve-seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge (for rotating lift-valves F01L1/32)	F01L3/06	F01L3/06		593
F01L3/08	8	Valves guides; Sealing of valve stem, e.g. sealing by lubricant	F01L3/08	F01L3/08		1216
F01L3/085	9	{Valve cages}	F01L3/08	F01L3/08		170
F01L3/10	8	Connecting springs to valve members	F01L3/10	F01L3/10		868
F01L2003/11	8	{Connecting valve members to rocker arm or tappet}	F01L3/00	F01L3/11		30
F01L3/12	8	Cooling of valves	F01L3/12	F01L3/12		173
F01L3/14	9	by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve	F01L3/14	F01L3/14		396
F01L3/16	9	by means of a fluid flowing through or along valve, e.g. air	F01L3/16	F01L3/16		140
F01L3/18	10	Liquid cooling of valve	F01L3/18	F01L3/18		175
F01L3/20	8	Shapes or constructions of valve members, not provided for in preceding subgroups of this group	F01L3/20	F01L3/20		966
F01L3/205	9	{Reed valves}	F01L3/20	F01L3/20		380
F01L3/22	8	Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats	F01L3/22	F01L3/22		812
F01L3/24	8	Safety means or accessories, not provided for in preceding sub- groups of this group	F01L3/24	F01L3/24		283
F01L2003/25	8	{Valve configurations in relation to engine}	F01L3/00	F01L3/25		99
F01L2003/251	9	{Large number of valves, e.g. five or more}	F01L3/00	F01L3/25		74
F01L2003/253	9	{configured parallel to piston axis}	F01L3/00	F01L3/25		19
F01L2003/255	9	{configured other than parallel or symmetrical relative to piston axis}	F01L3/00	F01L3/25		45
F01L2003/256	9	{configured other than perpendicular to camshaft axis}	F01L3/00	F01L3/25		95
F01L2003/258	9	{opening away from cylinder}	F01L3/00	F01L3/25		125
F01L5/00	7	Slide valve-gear or valve-arrangements (with pure rotary or oscillatory movement F01L7/00)	F01L5/00	F01L5/00		58
F01L5/02	8	with other than cylindrical, sleeve or part annularly shaped valves, e.g. with flat-type valves	F01L5/02	F01L5/02		201
F01L5/04	8	with cylindrical, sleeve, or part-annularly shaped valves	F01L5/04	F01L5/04		694
F01L5/045	9	{Piston-type or cylinder-type valves arranged above the piston and coaxial with the cylinder axis}	F01L5/04	F01L5/04		270
F01L5/06	9	surrounding working cylinder or piston	F01L5/06	F01L5/06		1033
F01L5/08	10	Arrangements with several movements or several valves, e.g. one valve inside the other (with part-annularly shaped valves F01L5/12)	F01L5/08	F01L5/08		123
F01L5/10	11	with reciprocating and other movements of the same valve	F01L5/10	F01L5/10		465
F01L5/12	10	Arrangements with part-annularly-shaped valves	F01L5/12	F01L5/12		50
F01L5/14	8	characterised by the provision of valves with reciprocating and other movements (surrounding working cylinder or piston F01L5/06)	F01L5/14	F01L5/14		104
F01L5/16	9	with reciprocating and other movement of same valve, e.g. longitudinally of working cylinder and in cross direction	F01L5/16	F01L5/16		36
F01L5/18	9	with reciprocatory valve and other slide valve	F01L5/18	F01L5/18		60
F01L5/20	8	specially for two-stroke engines (F01L5/06, F01L5/14 take precedence)	F01L5/20	F01L5/20		64
F01L5/22	8	Multiple-valve arrangements (with valves surrounding working cylinder or piston F01L5/08; with reciprocatory and other slide valves F01L5/18; specially for two-stroke engines F01L5/20)	F01L5/22	F01L5/22		33
F01L5/24	8	Component parts, details or accessories, not provided for in preceding subgroups in this group	F01L5/24	F01L5/24		32
F01L7/00	7	Rotary or oscillatory slide valve-gear or valve arrangements (slide valves with combined rotary and non-rotary movements, combinations of rotary and non-rotary slide valves F01L5/00)	F01L7/00	F01L7/00		277
F01L7/02	8	with cylindrical, sleeve, or part-annularly shaped valves (of disc type F01L7/06; of conical type F01L7/08)	F01L7/02	F01L7/02		368
F01L7/021	9	{with one rotary valve}	F01L7/02	F01L7/02		443
F01L7/022	10	{Cylindrical valves having one recess communicating successively with aligned inlet and exhaust ports}	F01L7/02	F01L7/02		499
F01L7/023	10	{Cylindrical valves having a hollow or partly hollow body allowing axial inlet or exhaust fluid circulation}	F01L7/02	F01L7/02		150
F01L7/024	10	{Cylindrical valves comprising radial inlet and axial outlet or axial inlet and radial outlet}	F01L7/02	F01L7/02		470
F01L7/025	10	{Cylindrical valves comprising radial inlet and side outlet or side inlet and radial outlet}	F01L7/02	F01L7/02		50
F01L7/026	9	{with two or more rotary valves, their rotational axes being parallel, e.g. 4-stroke}	F01L7/02	F01L7/02		546
F01L7/027	9	{with two or more valves arranged coaxially (F01L7/045 takes precedence)}	F01L7/02	F01L7/02		93
F01L7/028	9	{having the rotational axis coaxial with the cylinder axis and the valve surface not surrounding piston or cylinder}	F01L7/02	F01L7/02		202
F01L7/029	9	{having the rotational axis of the valve parallel to the cylinder axis}	F01L7/02	F01L7/02		114
F01L7/04	9	surrounding working cylinder or piston	F01L7/04	F01L7/04		599
F01L7/045	10	{with two or more valves arranged coaxially}	F01L7/04	F01L7/04		29
F01L7/06	8	with disc type valves	F01L7/06	F01L7/06		476
F01L7/08	8	with conically or frusto-conically shaped valves	F01L7/08	F01L7/08		536
F01L7/10	8	with valves of other specific shape, e.g. spherical	F01L7/10	F01L7/10		292
F01L7/12	8	specially for two-stroke engines (F01L7/04 takes precedence)	F01L7/12	F01L7/12		326
F01L7/14	8	Multiple-valve arrangements (with valves surrounding working cylinder or piston F01L7/04; specially for two-stroke engines F01L7/12)	F01L7/14	F01L7/14		77
F01L7/16	8	Sealing or packing arrangements specially therefor	F01L7/16	F01L7/16		462
F01L7/18	8	Component parts, details, or accessories not provided for in preceding subgroups of this group	F01L7/18	F01L7/18		118
F01L9/00	7	Valve-gear or valve arrangements actuated non-mechanically	F01L9/00	F01L9/00		88
F01L9/10	8	by fluid means, e.g. hydraulic	F01L9/10	F01L9/10		1657
F01L9/11	9	in which the action of a cam is being transmitted to a valve by a liquid column	F01L9/11	F01L9/11		370
F01L9/12	10	with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem	F01L9/12	F01L9/12		203
F01L9/14	11	the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve	F01L9/14	F01L9/14		455
F01L9/16	9	Pneumatic means	F01L9/16	F01L9/16		208
F01L9/18	9	Means for increasing the initial opening force on the valve	F01L9/18	F01L9/18		20
F01L9/20	8	by electric means	F01L9/20	F01L9/20		2363
F01L9/21	9	actuated by solenoids	F01L9/21	F01L9/21		79
F01L2009/2103	10	{comprising one coil}	F01L9/21	F01L9/21		60
F01L2009/2105	10	{comprising two or more coils}	F01L9/21	F01L9/21		85
F01L2009/2107	11	{being disposed coaxially to the armature shaft}	F01L9/21	F01L9/21		28
F01L2009/2109	11	{The armature being articulated perpendicularly to the coils axes}	F01L9/21	F01L9/21		191
F01L2009/2115	10	{Moving coil actuators}	F01L9/21	F01L9/21		48
F01L2009/2117	10	{Floating actuators for varying the valve stroke}	F01L9/21	F01L9/21		2
F01L2009/2125	10	{Shaft and armature construction}	F01L9/21	F01L9/21		28
F01L2009/2126	11	{Arrangements for amplifying the armature stroke}	F01L9/21	F01L9/21		44
F01L2009/2128	10	{Core and coil construction}	F01L9/21	F01L9/21		21
F01L2009/213	10	{Casing construction}	F01L9/21	F01L9/21		21
F01L2009/2132	10	{Biasing means}	F01L9/21	F01L9/21		8
F01L2009/2134	11	{Helical springs}	F01L9/21	F01L9/21		15
F01L2009/2136	12	{Two opposed springs for intermediate resting position of the armature}	F01L9/21	F01L9/21		123
F01L2009/2138	11	{Torsion springs}	F01L9/21	F01L9/21		
F01L2009/214	11	{Pneumatic springs}	F01L9/21	F01L9/21		
F01L2009/2142	11	{Means for varying the spring bias}	F01L9/21	F01L9/21		1
F01L2009/2144	11	{Means for connecting springs to valve or anchor}	F01L9/21	F01L9/21		3
F01L2009/2146	10	{Latching means}	F01L9/21	F01L9/21		12
F01L2009/2148	11	{using permanent magnet}	F01L9/21	F01L9/21		87
F01L2009/2149	10	{Means for varying the air gap}	F01L9/21	F01L9/21		
F01L2009/2151	10	{Damping means}	F01L9/21	F01L9/21		35
F01L2009/2153	10	{Means for counteracting cylinder pressure}	F01L9/21	F01L9/21		5
F01L2009/2155	10	{Lash adjusting means}	F01L9/21	F01L9/21		4
F01L2009/2157	10	{Actuator cooling means}	F01L9/21	F01L9/21		11
F01L2009/2159	10	{Means for facilitating assembly}	F01L9/21	F01L9/21		3
F01L2009/2161	10	{Wiring}	F01L9/21	F01L9/21		5
F01L2009/2163	11	{Connectors}	F01L9/21	F01L9/21		9
F01L2009/2165	11	{Harnesses}	F01L9/21	F01L9/21		1
F01L2009/2167	10	{Sensing means}	F01L9/21	F01L9/21		26
F01L2009/2169	11	{Position sensors}	F01L9/21	F01L9/21		114
F01L2009/2171	11	{Vibration sensors}	F01L9/21	F01L9/21		2
F01L2009/2173	11	{Temperature sensors}	F01L9/21	F01L9/21		2
F01L2009/2174	11	{Flux sensors}	F01L9/21	F01L9/21		2
F01L2009/2176	11	{Spring force sensors}	F01L9/21	F01L9/21		
F01L9/22	9	actuated by rotary motors	F01L9/22	F01L9/22		205
F01L9/24	9	Piezoelectric actuators	F01L9/24	F01L9/24		75
F01L2009/25	9	{Mixed arrangement with both mechanically and electromagnetically actuated valves}	F01L9/20	F01L2009/25		21
F01L9/26	9	Driving circuits therefor	F01L9/26	F01L9/26		37
F01L9/30	8	Arrangements for setting the actuator position, e.g. the initial position	F01L9/30	F01L9/30		5
F01L9/40	8	Methods of operation thereof; Control of valve actuation, e.g. duration or lift	F01L9/40	F01L9/40		123
F01L2009/408	9	{Engine starting}	F01L9/40	F01L9/40		15
F01L2009/4082	10	{in normal conditions}	F01L9/40	F01L9/40		1
F01L2009/4084	10	{Cold start}	F01L9/40	F01L9/40		6
F01L2009/4086	9	{Soft landing, e.g. applying braking current; Levitation of armature close to core surface}	F01L9/40	F01L9/40		50
F01L2009/4088	9	{Fail safe, e.g. valve kept closed if not opening properly}	F01L9/40	F01L9/40		11
F01L2009/409	9	{Determination of valve speed}	F01L9/40	F01L9/40		15
F01L2009/4092	9	{Determination of valve timing during particular working conditions, e.g. deceleration}	F01L9/40	F01L9/40		1
F01L2009/4094	9	{Engine stopping; Engine stall}	F01L9/40	F01L9/40		10
F01L2009/4096	9	{relating to sticking duration}	F01L9/40	F01L9/40		11
F01L2009/4098	9	{relating to gap between armature shaft and valve stem end}	F01L9/40	F01L9/40		17
F01L11/00	7	Valve arrangements in working piston or piston-rod	F01L11/00	F01L11/00		28
F01L11/02	8	in piston	F01L11/02	F01L11/02		248
F01L11/04	9	operated by movement of connecting-rod	F01L11/04	F01L11/04		57
F01L11/06	10	operating oscillatory valve	F01L11/06	F01L11/06		5
F01L13/00	7	Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations	F01L13/00	F01L13/00		2889
F01L13/0005	8	{Deactivating valves}	F01L13/00	F01L13/00		2393
F01L2013/001	9	{Deactivating cylinders}	F01L13/00	F01L13/00		568
F01L13/0015	8	{for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque}	F01L13/00	F01L13/00		1526
F01L13/0021	9	{by modification of rocker arm ratio}	F01L13/00	F01L13/00		728
F01L13/0026	10	{by means of an eccentric}	F01L13/00	F01L13/00		632
F01L13/0031	9	{by modification of tappet or pushrod length}	F01L13/00	F01L13/00		475
F01L13/0036	9	{the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction}	F01L13/00	F01L13/00		2142
F01L13/0042	10	{with cams being profiled in axial and radial direction}	F01L13/00	F01L13/00		346
F01L13/0047	10	{the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other}	F01L13/00	F01L13/00		236
F01L2013/0052	10	{with cams provided on an axially slidable sleeve}	F01L13/00	F01L13/00		1106
F01L13/0057	9	{by splittable or deformable cams}	F01L13/00	F01L13/00		162
F01L13/0063	9	{by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot}	F01L13/00	F01L13/00		825
F01L2013/0068	10	{with an oscillating cam acting on the valve of the "BMW-Valvetronic" type}	F01L13/00	F01L13/00		332
F01L2013/0073	10	{with an oscillating cam acting on the valve of the "Delphi" type}	F01L13/00	F01L13/00		280
F01L2013/0078	9	{by modification of cam contact point by axially displacing the camshaft}	F01L13/00	F01L13/00		125
F01L2013/0084	9	{by modification of cam contact point by radially displacing the camshaft}	F01L13/00	F01L13/00		36
F01L2013/0089	9	{with means for delaying valve closing}	F01L13/00	F01L13/00		93
F01L2013/0094	10	{with switchable clamp for keeping valve open}	F01L13/00	F01L13/00		57
F01L13/02	8	for reversing	F01L13/02	F01L13/02		323
F01L13/04	8	for starting by means of fluid pressure	F01L13/04	F01L13/04		176
F01L13/06	8	for braking	F01L13/06	F01L13/06		1202
F01L13/065	9	{Compression release engine retarders of the "Jacobs Manufacturing" type}	F01L13/06	F01L13/06		605
F01L13/08	8	for decompression, e.g. during starting; for changing compression ratio	F01L13/08	F01L13/08		929
F01L13/085	9	{the valve-gear having an auxiliary cam protruding from the main cam profile}	F01L13/08	F01L13/08		224
F01L2013/10	8	{Auxiliary actuators for variable valve timing}	F01L13/00	F01L13/10		114
F01L2013/101	9	{Electromagnets}	F01L13/00	F01L13/10		446
F01L2013/103	9	{Electric motors}	F01L13/00	F01L13/10		272
F01L2013/105	9	{Hydraulic motors}	F01L13/00	F01L13/10		254
F01L2013/106	9	{Pneumatic motors}	F01L13/00	F01L13/10		25
F01L2013/108	9	{Centrifugal force}	F01L13/00	F01L13/10		16
F01L2013/11	8	{Sensors for variable valve timing}	F01L13/00	F01L13/11		34
F01L2013/111	9	{Camshafts position or phase}	F01L13/00	F01L13/11		75
F01L2013/113	9	{crankshafts position}	F01L13/00	F01L13/11		38
F01L2013/115	9	{Pressure}	F01L13/00	F01L13/11		7
F01L2013/116	9	{Temperature}	F01L13/00	F01L13/11		14
F01L2013/118	9	{Valve lift}	F01L13/00	F01L13/11		16
F01L15/00	7	Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups F01L17/00 - F01L29/00(valve drive or external valve-adjustment during operation, tripping-gear or tripping of valves F01L31/00)	F01L15/00	F01L15/00		54
F01L15/02	8	with valves other than cylindrical, sleeve, or part-annularly-shaped, e.g. flat D-valves	F01L15/02	F01L15/02		19
F01L15/04	9	main valve being combined with auxiliary valve (of drag valve type F01L15/10)	F01L15/04	F01L15/04		6
F01L15/06	10	of Meyer or Rider type, i.e. in which the expansion is varied at the expansion valve itself	F01L15/06	F01L15/06		5
F01L15/08	8	with cylindrical, sleeve, or part-annularly-shaped valves; Such main valves combined with auxiliary valves	F01L15/08	F01L15/08		362
F01L15/10	8	with main slide valve and auxiliary valve dragged thereby	F01L15/10	F01L15/10		35
F01L15/12	8	characterised by having means for effecting pressure equilibrium between two different cylinder spaces at idling	F01L15/12	F01L15/12		53
F01L15/14	8	Arrangements with several co-operating main valves, e.g. reciprocatory and rotary	F01L15/14	F01L15/14		26
F01L15/16	9	with reciprocatory slide valves only	F01L15/16	F01L15/16		9
F01L15/18	8	Valves arrangements not provided for in preceding subgroups of this main group	F01L15/18	F01L15/18		11
F01L15/20	8	Component parts, details, or accessories, not provided for in preceding subgroups of this main group	F01L15/20	F01L15/20		38
F01L17/00	7	Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston	F01L17/00	F01L17/00		55
F01L17/02	8	Drive or adjustment during operation, peculiar thereto, e.g. for reciprocating and oscillating movements or for several valves one inside the other	F01L17/02	F01L17/02		7
F01L19/00	7	Slide valve-gear or valve arrangements with reciprocatory and other movement of same valve, other than provided for in F01L17/00, e.g. longitudinally of working cylinder and in cross direction	F01L19/00	F01L19/00		18
F01L19/02	8	Drive or adjustment during operation, peculiar thereto	F01L19/02	F01L19/02		4
F01L21/00	7	Use of working pistons or pistons-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines	F01L21/00	F01L21/00		71
F01L21/02	8	Piston or piston-rod used as valve members {(F01L25/066 takes precedence)}	F01L21/02	F01L21/02		204
F01L21/04	8	Valves arranged in or on piston or piston-rod	F01L21/04	F01L21/04		436
F01L23/00	7	Valves controlled by impact by piston, e.g. in free-piston machines	F01L23/00	F01L23/00		972
F01L25/00	7	Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means	F01L25/00	F01L25/00		9
F01L25/02	8	by fluid means	F01L25/02	F01L25/02		76
F01L25/04	9	by working-fluid of machine or engine, e.g. free-piston machine	F01L25/04	F01L25/04		202
F01L25/06	10	Arrangements with main and auxiliary valves, at least one of them being fluid-driven	F01L25/06	F01L25/06		361
F01L25/063	11	{the auxiliary valve being actuated by the working motor-piston or piston-rod}	F01L25/06	F01L25/06		470
F01L25/066	11	{piston or piston-rod being used as auxiliary valve}	F01L25/06	F01L25/06		280
F01L25/08	8	by electric or magnetic means	F01L25/08	F01L25/08		278
F01L27/00	7	Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in F01L21/00&#160;-&#160;F01L25/00	F01L27/00	F01L27/00		5
F01L27/02	8	the machine or engine having rotary or oscillatory valves	F01L27/02	F01L27/02		6
F01L27/04	8	Delayed-action controls, e.g. of cataract or dashpot type	F01L27/04	F01L27/04		32
F01L29/00	7	Reversing-gear	F01L29/00	F01L29/00		11
F01L29/02	8	by displacing eccentric	F01L29/02	F01L29/02		67
F01L29/04	8	by links or guide rods	F01L29/04	F01L29/04		1168
F01L29/06	8	by interchanging inlet and exhaust ports	F01L29/06	F01L29/06		36
F01L29/08	8	specially for rotary or oscillatory valves	F01L29/08	F01L29/08		6
F01L29/10	8	Details, e.g. drive	F01L29/10	F01L29/10		6
F01L29/12	9	Powered reverse gear	F01L29/12	F01L29/12		45
F01L31/00	7	Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L15/00 - F01L29/00(sensing elements measuring the variable or condition to be controlled or regulated F01B25/04)	F01L31/00	F01L31/00		95
F01L31/02	8	with tripping-gear (for oscillatory valves F01L31/06); Tripping of valves	F01L31/02	F01L31/02		45
F01L31/04	9	with positively-driven trip levers	F01L31/04	F01L31/04		60
F01L31/06	8	with tripping-gear specially for oscillatory valves; Oscillatory tripping-valves, e.g. of Corliss type	F01L31/06	F01L31/06		44
F01L31/08	8	Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear	F01L31/08	F01L31/08		27
F01L31/10	9	the drive being effected by eccentrics (F01L31/14 takes precedence)	F01L31/10	F01L31/10		30
F01L31/12	10	Valve adjustment by displacing eccentric	F01L31/12	F01L31/12		5
F01L31/14	9	Valve adjustment by links or guide rods, e.g. in valve-gears with eccentric drive	F01L31/14	F01L31/14		48
F01L31/16	9	the drive being effected by specific means other than eccentric, e.g. cams; Valve adjustment in connection with such drives	F01L31/16	F01L31/16		396
F01L31/18	9	specially for rotary or oscillatory valves	F01L31/18	F01L31/18		17
F01L33/00	7	Rotary or oscillatory slide valve-gear or valve arrangements, specially adapted for machines or engines with variable fluid distribution (drive, adjustment during operation, tripping-gear, reversing-gear, use of working pistons or piston-rods as valves or as valve-supporting elements, valve-gear or valve arrangements peculiar to free-piston machines or engines F01L15/00&#160;-&#160;F01L31/00)	F01L33/00	F01L33/00		7
F01L33/02	8	rotary	F01L33/02	F01L33/02		166
F01L33/04	8	oscillatory	F01L33/04	F01L33/04		104
F01L35/00	7	Lift valve-gear or valve arrangements specially adapted for machines or engines with variable fluid distribution (drive, adjustment during operation, tripping-gear, reversing-gear, use of working pistons or piston-rods as valves or as valve-supporting elements, valve-gear or valve arrangements peculiar to free-piston machines or engines F01L15/00&#160;-&#160;F01L31/00)	F01L35/00	F01L35/00		10
F01L35/02	8	Valves	F01L35/02	F01L35/02		8
F01L35/04	8	Arrangements of valves in the machine or engine, e.g. relative to working cylinder	F01L35/04	F01L35/04		37
F01L2201/00	7	Electronic control systems; Apparatus or methods therefor	CPCONLY	F01L2201/00		627
F01L2250/00	7	Camshaft drives characterised by their transmission means	CPCONLY	F01L2250/00		2
F01L2250/02	8	the camshaft being driven by chains	CPCONLY	F01L2250/02		766
F01L2250/04	8	the camshaft being driven by belts	CPCONLY	F01L2250/04		489
F01L2250/06	8	the camshaft being driven by gear wheels	CPCONLY	F01L2250/06		175
F01L2301/00	7	Using particular materials	CPCONLY	F01L2301/00		2008
F01L2301/02	8	Using ceramic materials	CPCONLY	F01L2301/02		303
F01L2303/00	7	Manufacturing of components used in valve arrangements	CPCONLY	F01L2303/00		2186
F01L2303/01	8	Tools for producing, mounting or adjusting, e.g. some part of the distribution	CPCONLY	F01L2303/01		826
F01L2303/02	8	Initial camshaft settings	CPCONLY	F01L2303/02		97
F01L2305/00	7	Valve arrangements comprising rollers	CPCONLY	F01L2305/00		3093
F01L2305/02	8	Mounting of rollers	CPCONLY	F01L2305/02		534
F01L2307/00	7	Preventing the rotation of tappets	CPCONLY	F01L2307/00		523
F01L2309/00	7	Self-contained lash adjusters	CPCONLY	F01L2309/00		103
F01L2311/00	7	Differential gears located between crankshafts and camshafts for varying the timing of valves	CPCONLY	F01L2311/00		24
F01L2313/00	7	Rotary valve drives	CPCONLY	F01L2313/00		63
F01L2710/00	7	Control of valve gear, speed or power	CPCONLY	F01L2710/00		13
F01L2710/003	8	Control of valve gear for two stroke engines	CPCONLY	F01L2710/003		45
F01L2710/006	8	Safety devices therefor	CPCONLY	F01L2710/006		349
F01L2740/00	7	Control of slide-valve gear; Control pistons	CPCONLY	F01L2740/00		2
F01L2740/003	8	more than one slide-valve, e.g. for four stroke engines	CPCONLY	F01L2740/003		4
F01L2740/006	8	more than one slide-valve, e.g. for two stroke engines	CPCONLY	F01L2740/006		8
F01L2750/00	7	Control of valve gear for four stroke engines directly driven by the crankshaft	CPCONLY	F01L2750/00		16
F01L2760/00	7	Control of valve gear to facilitate reversing, starting, braking of four stroke engines	CPCONLY	F01L2760/00		28
F01L2760/001	8	for starting four stroke engines	CPCONLY	F01L2760/001		32
F01L2760/002	8	for reversing or starting four stroke engines	CPCONLY	F01L2760/002		383
F01L2760/003	8	for switching to compressor action in order to brake	CPCONLY	F01L2760/003		110
F01L2760/004	9	whereby braking is exclusively produced by compression in the cylinders	CPCONLY	F01L2760/004		117
F01L2760/005	9	in cooperation with vehicle transmission or brakes; devices to facilitate switching to compressor action by means of other control devices, e.g. acceleration pedal or clutch	CPCONLY	F01L2760/005		181
F01L2760/006	8	for reversing two stroke engines	CPCONLY	F01L2760/006		50
F01L2760/007	8	for starting two stroke engines	CPCONLY	F01L2760/007		26
F01L2760/008	8	for reversing and restarting two stroke engines	CPCONLY	F01L2760/008		
F01L2800/00	7	Methods of operation using a variable valve timing mechanism	CPCONLY	F01L2800/00		1052
F01L2800/01	8	Starting	CPCONLY	F01L2800/01		339
F01L2800/02	8	Cold running	CPCONLY	F01L2800/02		38
F01L2800/03	8	Stopping; Stalling	CPCONLY	F01L2800/03		170
F01L2800/04	8	Timing control at idling	CPCONLY	F01L2800/04		10
F01L2800/05	8	Timing control under consideration of oil condition	CPCONLY	F01L2800/05		68
F01L2800/06	8	Timing or lift different for valves of same cylinder	CPCONLY	F01L2800/06		152
F01L2800/08	8	Timing or lift different for valves of different cylinders	CPCONLY	F01L2800/08		119
F01L2800/09	8	Calibrating	CPCONLY	F01L2800/09		76
F01L2800/10	8	Providing exhaust gas recirculation [EGR]	CPCONLY	F01L2800/10		208
F01L2800/11	8	Fault detection, diagnosis	CPCONLY	F01L2800/11		267
F01L2800/12	8	Fail safe operation	CPCONLY	F01L2800/12		181
F01L2800/13	8	Throttleless	CPCONLY	F01L2800/13		95
F01L2800/14	8	Determining a position, e.g. phase or lift	CPCONLY	F01L2800/14		108
F01L2800/15	8	Balancing of rotating parts	CPCONLY	F01L2800/15		24
F01L2800/16	8	Preventing interference	CPCONLY	F01L2800/16		27
F01L2800/17	8	Maintenance; Servicing	CPCONLY	F01L2800/17		62
F01L2800/18	8	Testing or simulation	CPCONLY	F01L2800/18		68
F01L2800/19	8	Valves opening several times per stroke	CPCONLY	F01L2800/19		34
F01L2810/00	7	Arrangements solving specific problems in relation with valve gears	CPCONLY	F01L2810/00		95
F01L2810/01	8	Cooling	CPCONLY	F01L2810/01		100
F01L2810/02	8	Lubrication	CPCONLY	F01L2810/02		1049
F01L2810/03	8	Reducing vibration	CPCONLY	F01L2810/03		235
F01L2810/04	8	Reducing noise	CPCONLY	F01L2810/04		365
F01L2810/05	8	Related to pressure difference on both sides of a valve	CPCONLY	F01L2810/05		26
F01L2820/00	7	Details on specific features characterising valve gear arrangements	CPCONLY	F01L2820/00		44
F01L2820/01	8	Absolute values	CPCONLY	F01L2820/01		1014
F01L2820/02	8	Formulas	CPCONLY	F01L2820/02		194
F01L2820/03	8	Auxiliary actuators	CPCONLY	F01L2820/03		75
F01L2820/031	9	Electromagnets	CPCONLY	F01L2820/031		458
F01L2820/032	9	Electric motors	CPCONLY	F01L2820/032		809
F01L2820/033	9	Hydraulic engines	CPCONLY	F01L2820/033		153
F01L2820/034	9	Pneumatic engines	CPCONLY	F01L2820/034		33
F01L2820/035	9	Centrifugal forces	CPCONLY	F01L2820/035		106
F01L2820/04	8	Sensors	CPCONLY	F01L2820/04		143
F01L2820/041	9	Camshafts position or phase sensors	CPCONLY	F01L2820/041		604
F01L2820/042	9	Crankshafts position	CPCONLY	F01L2820/042		255
F01L2820/043	9	Pressure	CPCONLY	F01L2820/043		67
F01L2820/044	9	Temperature	CPCONLY	F01L2820/044		52
F01L2820/045	9	Valve lift	CPCONLY	F01L2820/045		110
