On-board diagnosis

The second range covers exhaust temperature measurements from -40 to 760 °C for diesel engines and even up to 1200 °C for gasoline engines. These market is currently driven by legislative emission requirements worldwide like ULEV (ultra-low emission vehicles), OBD (on-board diagnosis), and EUR04. Improved emission systems need temperature measurements in the exhaust system before and after the catalyst. 

Recently on board diagnosis (OBD) system requires the detection of conversion efficiency change of a TWC and an oxygen sensor is installed even in the downstream of the catalyst. Rear oxygen sensor is installed in a cleaner exhaust gas than the front oxygen sensor. Therefore, the sensor itself is hardly deteriorated and it is utilized for lambda point compensation of the front oxygen sensor. 

F. P. Boyle, V. F. Lvovich, H. Leye, On-board diagnosis of lubricant performance condition— a better way to make maintenance decisions, 2005 Annual Meeting of Society of Tribologists and Lubrication Engineers, Las Vegas, May 16,2005. 

The EOl Autonomous Sciencecraft Experiment (ASE) included autonomous on-board fault diagnosis and recovery (Livingstone 2), as well as considerable autonomy of the science instruments and downlink of the resulting imageiy and data. Following this demonstration, ASE was adopted for operational use. It has been in operation since 2003 (Chien et al., 2005, 2006). 

Diagnosis of plant data depends heavily upon actual physical inspection of the equipment, checking on conditions not apparent from any panel board or instrument readings. Included are ... 

Fault diagnosis method for circuit board based on BP neural networks... 

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