Valve lash detection and analysis

Some examples described herein may involve determining an advance timing window between the valve opening or closing and a designated time that the valve is scheduled to open or close; determining a closing velocity of the valve; monitoring an engine speed of the engine; determining valve lash infor...

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Bibliographische Detailangaben
Hauptverfasser:	Dong, Zhaoxu, Zhang, Yanchai, Rajendran, Arun, Chen, Lidi, Lu, Yifeng, Hu, Xuefei, Harms, Rodney D
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE BLASTING CHECKING-DEVICES COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL GENERATING RANDOM NUMBERS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES STEAM ENGINES TIME OR ATTENDANCE REGISTERS VOTING OR LOTTERY APPARATUS WEAPONS
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Beschreibung
Zusammenfassung:	Some examples described herein may involve determining an advance timing window between the valve opening or closing and a designated time that the valve is scheduled to open or close; determining a closing velocity of the valve; monitoring an engine speed of the engine; determining valve lash information based on the advance timing window, the closing velocity, and the engine speed, wherein the valve lash information identifies a magnitude of the valve lash or whether the magnitude of the valve lash associated with the valve satisfies a threshold; and performing an action based on the valve lash information.