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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Bibliographic Details
Main Authors RAJENDRAN, Arun, LU, Yifeng, CHEN, Lidi, HU, Xuefei, DONG, Zhaoxu, ZHANG, Yanchai, HARMS, Rodney D
Format Patent
LanguageEnglish
Published 17.10.2019
Subjects
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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Summary: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.
Bibliography:Application Number: US201815952578