A family of active thermocouples was developed for high temperature exhaust gas temperature measurement. A combination of thermocouple material improvements, package design and integral signal conditioning vastly improve accuracy and durability performance for diesel emission control. Sensors were developed to withstand temperatures from -40 to +1200°C and vibration levels of 30 GRMS with immersion lengths over 85mm. Signal conditioning supplies an interface to engine control units and provides an accuracy of up to ±1% from 500 to 1000°C, depending on output type and sensor construction. Results are presented for accuracy, vibration, high temperature stability and time response. System accuracy factors are discussed for various output types.
The Development of Active Thermocouples for Diesel Exhaust Temperature Measurement
Sae Technical Papers
Powertrains, Fuels and Lubricants Meeting ; 2008
2008-10-06
Aufsatz (Konferenz)
Englisch
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