APPARATUS FOR DETECTING ABNORMALITY OF SENSOR

• Main Author: NAGOSHI KATSUYUKI
• Format: Patent
• Language: English
• Published: 13.10.2011
• Subjects: BLASTING; CALCULATING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMPUTING; CONTROLLING COMBUSTION ENGINES; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; MECHANICAL ENGINEERING; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR; WEAPONS

Temperatures of intake-air temperature, intercooler outlet temperature and intake manifold temperature sensors are compared in cold time of an engine to determine any characteristic abnormality of the sensors. A first temperature difference is obtained from temperatures of the intercooler outlet temperature sensor before and after increase in boost pressure to determine any characteristic abnormality of the intercooler outlet temperature sensor. A second temperature difference is obtained from temperatures of the intake manifold temperature and intercooler outlet temperature sensors after opening an EGR valve to determine any characteristic abnormality of the intake manifold temperature sensor.