MONITORING AND DIAGNOSIS OF VARIABLE VALVE ACTUATION SYSTEMS

A system for monitoring operation and diagnosing malfunctions in a variable valve actuation device is disclosed. The system has a rocker arm assembly that includes a first arm, a second arm with the first and second arms attached at a first end, a hydraulically operated latch assembly that functions...

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Main Authors ZURFACE AUSTIN ROBERT, VANDEUSEN BRIAN KARL, NIELSEN DOUGLAS JOHN, HILDEBRANDT MARK WILLIAM, BOYCHUK ROBERT, TRUDELL DANIEL BENNETT
Format Patent
LanguageChinese
English
Published 15.02.2019
Subjects
BLASTING
COMBUSTION ENGINES
CONTROLLING COMBUSTION ENGINES
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
ENGINE PLANTS IN GENERAL
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
WEAPONS
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Summary:A system for monitoring operation and diagnosing malfunctions in a variable valve actuation device is disclosed. The system has a rocker arm assembly that includes a first arm, a second arm with the first and second arms attached at a first end, a hydraulically operated latch assembly that functions to secure the first arm to the second arm when latched. The latch may be operated by a remote device. The rocker assembly pivots on a hydraulic lash adjuster (HLA). A control gallery connects the hydraulic valve to the latch. A pressure transducer is positioned either in the control gallery or theHLA and creates a signal indicating the sensed pressure. A control unit reads the signal from the pressure transducer and identifies malfunctions of the rocker arm assembly. The system may also employa non-contact transducer that monitors the state of the rocker arm assembly. The system may also employ a valve stem position sensor that monitors the engine valve position to determine malfunctionsof the rocker arm assembly.
Bibliography:Application Number: CN201811129610