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Class Information
Number: 123/90.15
Name: Internal-combustion engines > Poppet valve operating mechanism > With means for varying timing
Description: Device wherein means provided to vary the time, extent of duration of valve opening relative to the operating cycle of the engine.










Sub-classes under this class:

Class Number Class Name Patents
123/90.16 Cam-to-valve relationship 1,891
123/90.17 Camshaft or cam characteristics 1,969


Patents under this class:

Patent Number Title Of Patent Date Issued
8701607 System and method for engine valve lift strategy Apr. 22, 2014
8701605 Spark ignition type internal combustion engine Apr. 22, 2014
8701409 Method and system for a turbocharged engine Apr. 22, 2014
8695549 Valve train for internal combustion engines for actuating gas exchange valves Apr. 15, 2014
8695548 Valve timing control apparatus Apr. 15, 2014
8695545 Phase changing device of camshaft Apr. 15, 2014
8695544 High expansion ratio internal combustion engine Apr. 15, 2014
8692492 Lead angle value setting method, motor driving control circuit, and brushless motor Apr. 8, 2014
8689770 High-temperature-flow engine brake with valve actuation Apr. 8, 2014
8689750 Camshaft phasing device Apr. 8, 2014
8689749 Valve timing controller Apr. 8, 2014
8689748 Valve timing control apparatus of internal combustion engine Apr. 8, 2014
8689746 Device for the variable adjustment of valve lift curves of gas exchange valves of an internal combustion engine Apr. 8, 2014
8688352 Method for automatically controlling an internal combustion engine Apr. 1, 2014
8683968 Variable valve assembly for internal combustion engine Apr. 1, 2014
8683967 Displacement groove contour of sliding cam assemblies of an internal combustion reciprocating piston engine Apr. 1, 2014
8683965 Engine assembly including camshaft actuator Apr. 1, 2014
8683789 Exhaust valve assembly with intermediate position Apr. 1, 2014
8682569 Systems and methods for diagnosing valve lift mechanisms and oil control valves of camshaft lift systems Mar. 25, 2014
8682564 Camshaft position sensing in engines with electric variable cam phasers Mar. 25, 2014
8677965 Valve timing control device of internal combustion engine Mar. 25, 2014
8677963 Electrical camshaft phaser with energy recovery Mar. 25, 2014
8677962 Cam phaser locking systems Mar. 25, 2014
8677960 Camshaft adjuster, in particular with camshaft Mar. 25, 2014
8677959 Variable valve timing controller for internal combustion engine Mar. 25, 2014
8677957 Spark ignited internal combustion engine system Mar. 25, 2014
8677956 Control valve for a device for variably adjusting the control times of gas-exchange valves of an internal combustion engine Mar. 25, 2014
8671900 Device for variably adjusting the control times of gas exchange valves of an internal combustion engine Mar. 18, 2014
8671898 Method and device for operating an internal combustion engine Mar. 18, 2014
8671896 Variable compression ratio V-type internal combustion engine Mar. 18, 2014
8667938 Combustion engine with variable valve actuation Mar. 11, 2014
8662041 Device for variable adjustment of the control times of gas exchange valves of an internal combustion engine Mar. 4, 2014
8662040 Oscillating-motor camshaft adjuster having a hydraulic valve Mar. 4, 2014
8662036 Method for operating an internal combustion engine having a variable valve drive Mar. 4, 2014
8662033 Modular engine assembly and fluid control assembly for hydraulically-actuated mechanism Mar. 4, 2014
8657044 Pneumatic hybrid internal combustion engine on the basis of fixed camshafts Feb. 25, 2014
8656876 Valve timing control apparatus Feb. 25, 2014
8656874 Control device of actuator Feb. 25, 2014
8656870 Control strategy for multi-stroke engine system Feb. 25, 2014
8651077 Fluid-pressure-operated valve timing controller Feb. 18, 2014
8651076 Adjusting system for camshafts of an internal combustion engine Feb. 18, 2014
8651075 Engine assembly including camshaft with independent cam phasing Feb. 18, 2014
8651072 Spark ignition type internal combustion engine Feb. 18, 2014
8646431 Vehicle provided with valve-stop-mechanism-equipped internal combustion engine Feb. 11, 2014
8646423 Hybrid powertrain assembly including engine with variable valve lift Feb. 11, 2014
8640661 Continuous variable valve timing apparatus Feb. 4, 2014
8640660 Continuously variable valve actuation apparatus for an internal combustion engine Feb. 4, 2014
8640334 Method of setting lash in a cam phaser Feb. 4, 2014
8635988 Variable valve device for internal combustion engine Jan. 28, 2014
8635978 Rotor for a camshaft adjuster and camshaft adjuster Jan. 28, 2014











 
 
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