ClassID:

137376

F01L13/0031 - CPC Classification

Classification description:

Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of tappet or pushrod length

Recent Application in this class:
#1
20250369374
2025-12-04

INTERNAL COMBUSTION ENGINE WITH OPTIMIZED INTAKE SYSTEM

#2
20230272726
2023-08-31

Tappet assembly for valve lift profile modification

#3
20200318554
2020-10-08

Valve rocker arm assembly, variable air distribution mechanism and engine

#4
20200208546
2020-07-02

Cylinder deactivation energy waste management

#5
20200109648
2020-04-09

Variable length piston assemblies for engine valve actuation systems

#6
20190024542
2019-01-24

Continuously variable valve lift system and automobile

#7
20180320603
2018-11-08

Switching rocker arm having cantilevered rollers

#8
20180298795
2018-10-18

Rocker arm assembly for engine brake

#9
20180298794
2018-10-18

Cylinder deactivation control and methods

#10
20180283312
2018-10-04

Internal combustion engine

#11
20180274457
2018-09-27

Cylinder deactivation control and methods

#12
20180230914
2018-08-16

Cylinder deactivation hydraulic lash adjuster

#13
20180156140
2018-06-07

SWITCHING ROCKER ARM FOR INTERNAL EXHAUST GAS RECIRCULATION

#14
20170234172
2017-08-17

Locking device for a switchable valve drive component

#15
20170122148
2017-05-04

VARIABLE VALVE TIMING MECHANISM

#16
20160305349
2016-10-20

Torque modulation for internal combustion engine

#17
20160169067
2016-06-16

VARIABLE VALVE LIFT APPARATUS

#18
20160017769
2016-01-21

Variable valve mechanism for internal combustion engine

#19
20150267575
2015-09-24

VARIABLE VALVE SYSTEM OF INTERNAL COMBUSTION ENGINE

#20
20150252694
2015-09-10

Compression relief brake reset mechanism

#21
20150167510
2015-06-18

Variable valve lift apparatus

#22
20150090206
2015-04-02

Valve mechanism for internal combustion engine and control device for valve mechanism

#23
20150075463
2015-03-19

Variable valve system

#24
20150034031
2015-02-05

Internal-combustion engine having a system for variable actuation of the intake valves, provided with an electrically actuated valve having two ways and three positions

#25
20140283771
2014-09-25

INTERNAL COMBUSTION ENGINE

#26
20140245979
2014-09-04

Variable valve timing arrangement

#27
20140137823
2014-05-22

Variable valve mechanism of internal combustion engine

#28
20140109849
2014-04-24

Variable valve timing apparatus

#29
20140058650
2014-02-27

Valvetrain fault indication systems and methods using knock sensing

#30
20140053809
2014-02-27

Valvetrain fault indication systems and methods using engine misfire

#31
20130319370
2013-12-05

Method and apparatus for resetting valve lift for use in engine brake

#32
20130319358
2013-12-05

Valve drive with additional lift in the cam base circle

#33
20130125844
2013-05-23

Self-adaptive hydraulic variable valve timing system for diesel engine and control method

#34
20130000574
2013-01-03

Oil control valve assembly for engine cam switching

#35
20120209494
2012-08-16

Variable valve lift mechanism fault detection systems and methods

#36
20120186546
2012-07-26

Lost motion valve control apparatus

#37
20120132161
2012-05-31

Variable valve lift apparatus

#38
20120118274
2012-05-17

Variable displacement engine assembly including partial boost arrangement

#39
20120067313
2012-03-22

Engine equipped with variable valve device

#40
20120048221
2012-03-01

VARIABLE VALVE ACTUATOR

#41
20110271922
2011-11-10

Variable valve lift apparatus

#42
20110214632
2011-09-08

HYDRO-MECHANICAL VARIABLE VALVE ACTUATION

#43
20110132305
2011-06-09

Variable tappet

#44
20110132301
2011-06-09

Electro-hydraulic variable valve lift apparatus

#45
20110094465
2011-04-28

Two-step valve lifter control systems and methods

#46
20110023801
2011-02-03

Internal combustion engine with variable-lift electrohydraulic valve actuation

#47
20100307438
2010-12-09

Variable tappet

#48
20100229811
2010-09-16

Switchable component of a valve train of an internal combustion engine

#49
20100186696
2010-07-29

Oil control valve assembly for engine cam switching

#50
20100175643
2010-07-15

Anti-rotation locking mechanism for controlling mechanical play

#51
20100101515
2010-04-29

Cam drive

#52
20090320780
2009-12-31

Control arrangement for a gas exchange valve in a piston engine and method of controlling a gas exchange valve in a piston engine

#53
20090308340
2009-12-17

Cam-Driven Hydraulic Lost-Motion Mechanisms for Overhead Cam and Overhead Valve Valvetrains

#54
20090283063
2009-11-19

Wear resistant camshaft and follower material

#55
20090199803
2009-08-13

Mechanical lash ring for a switchable valve train member

#56
20090151682
2009-06-18

Variable valve lift apparatus

#57
20090145391
2009-06-11

SWITCHING ELEMENT FOR A VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE

#58
20090145378
2009-06-11

Switchable component for a valve train of an internal combustion engine

#59
20090126661
2009-05-21

Variable valve lift apparatus

#60
20090093946
2009-04-09

Method of controlling an internal combustion engine and system including the engine

#61
20090071421
2009-03-19

Internal combustion engine with breather chamber

#62
20090056653
2009-03-05

Valve drive of an internal combustion engine

#63
20090007871
2009-01-08

Valve train of an internal combustion engine having a cylindrical valve tappet

#64
20080295577
2008-12-04

Positional arrangement of knock sensor on a motorcycle engine

#65
20080289597
2008-11-27

Switchable valve train member

#66
20080264370
2008-10-30

Switchable component for a valve drive of an internal combustion engine

#67
20080178828
2008-07-31

Single hydraulic circuit module for dual lift of multiple engine valves

#68
20080149058
2008-06-26

Actuator and Control Method For Variable Valve Timing (Vvt) Mechanism

#69
20080115749
2008-05-22

Variable valve drive of an internal combustion engine

#70
20080110426
2008-05-15

Mounting module of oil control valve for tappet control in cylinder deactivation engine

#71
20080110424
2008-05-15

Variable valve lift apparatus

#72
20080105226
2008-05-08

Gas exchange valve actuating apparatus

#73
20080087244
2008-04-17

Hydraulic valve lash adjuster with idle stroke function for a valve train of an internal combustion engine

#74
20080017153
2008-01-24

Valvetrain switchable lever arm for internal combustion engine using collapsing pivot element at center pivot

#75
20070295293
2007-12-27

Valve lifter assembly for selectively deactivating a cylinder

#76
20070227479
2007-10-04

Control device and method for variable valve mechanism

#77
20070215088
2007-09-20

Adjustable engine

#78
20070215081
2007-09-20

Cylinder deactivation apparatus incorporating a distributed accumulator

#79
20070215080
2007-09-20

VARIABLE VALVE ACTUATION

#80
20070209617
2007-09-13

Assembly process for hydraulic valve lifters to reduce variation in valve lift

#81
20070193538
2007-08-23

Valve drive of an internal combustion engine

#82
20070169736
2007-07-26

Valve timing mechanism of an internal combustion engine

#83
20070157901
2007-07-12

System and method for controlling auto-ignition

#84
20070151534
2007-07-05

Dual valve lift blip with single cam lobe for gasoline engines

#85
20070144467
2007-06-28

Valve timing gear of an internal combustion engine

#86
20070107686
2007-05-17

Oil passage construction for die-cast formed product, and oil passage construction for internal combustion engine

#87
20070089698
2007-04-26

Lash adjuster and valve system

#88
20070044743
2007-03-01

Variable valve train of an internal combustion engine

#89
20070012273
2007-01-18

Force transmitting arrangement for a valve drive of an internal combustion engine

#90
20070006838
2007-01-11

Deactivation roller hydraulic valve lifter

#91
20070000464
2007-01-04

Deactivation roller hydraulic valve lifter

#92
20070000463
2007-01-04

Deactivation roller hydraulic valve lifter

#93
20070000459
2007-01-04

Deactivating element for a valve train of an internal combustion engine

#94
20060273271
2006-12-07

Valve actuation system with valve seating control

#95
20060249113
2006-11-09

Switchable cam follower

#96
20060219199
2006-10-05

Switching element

#97
20060219198
2006-10-05

Variable valve drive for changing the control timing of cam-actuated gas-exchange valves

#98
20060196457
2006-09-07

Valve actuator assembly

#99
20060191503
2006-08-31

Switching element for a valve train of an internal combustion engine

#100
20060185635
2006-08-24

Valve deactivator latching assembly

#101
20060118074
2006-06-08

Variable cam follower for an internal combustion engine

#102
20060102119
2006-05-18

Valvetrain with two-step switchable rocker and deactivating stationary lash adjuster

#103
20060091344
2006-05-04

Variable valve gear

#104
20060081213
2006-04-20

System and method for variable valve actuation in an internal combustion engine

#105
20060060158
2006-03-23

Method for changing the lift of an inlet valve of an internal combustion engine

#106
20060042582
2006-03-02

Switchable cam follower

#107
20060016407
2006-01-26

Engine valve performance controller

#108
20050241598
2005-11-03

Variable valve mechanism

#109
20050235934
2005-10-27

Variable mechanical valve timing mechanism having an adjusting device

#110
20050189510
2005-09-01

Electromagnetic hydraulic valve, typically a 3/2 directional switching valve for controlling a variable valve train of an internal combustion engine

#111
20050183685
2005-08-25

Valve train of an internal combustion engine

#112
20050166880
2005-08-04

Switch element

#113
20050132993
2005-06-23

Coupling mechanism

#114
20050132985
2005-06-23

System and method of retaining hydraulic fluid in a hydraulic valve actuation system

#115
20050120989
2005-06-09

Switching element for a valve train of an internal combustion engine

#116
20050116189
2005-06-02

Compound valve assembly for controlling high and low oil flow and pressure

#117
20050098135
2005-05-12

Engine valve actuator assembly

#118
20050061281
2005-03-24

Valve lifter for internal combustion engine

#119
20050061279
2005-03-24

Engine lubrication system

#120
20050056246
2005-03-17

Hydraulic cam follower

#121
20050045132
2005-03-03

Deactivation roller hydraulic valve lifter

#122
20050005884
2005-01-13

Switching element for a valve drive of an internal combustion engine

#123
20050005882
2005-01-13

Device for hydraulic valve lift switching

#124
15286671
2018-11-13

Length adjustable pushrod device for internal combustion engines

#125
15235633
2018-01-09

Method for diagnosing a variable-lift camshaft follower