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Development of High Performance Catalyst Temperature Sensor for NOx Catalyst Control
Technical Paper
1999-01-0615
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
The development of new systems to reduce exhaust gases is being investigated in response to OBD-II regulations and regulations all over the world relating to the introduction of low exhaust gas vehicles (LEV, ULEV, STEP3, STEP4). We have developed a highly responsive thermistor type catalyst temperature sensor that is very accurate, highly heat resistant, has a wide detection range, and that can be used in exhaust gas cleansing systems.
The key technologies used in this new catalyst temperature sensor are:
- 1Wide detection range: The thermistor is of a network construction that comprises a semi-conductor with a new Y-Cr-Mn perovskite crystal structure and an insulator. The temperature range can be set by changing the proportions of semi-conductor and insulator.There are three settings (accuracy of within ±10°C)
- 100°C to 600°C- For De-NOx catalyst control
- 200°C to 700°C- For NOx catalyst control in direct gasoline injection engines
- 600°C to 1,000°C- For high speed fuel consumption reduction systems and misfiring detection systems
- 2High responsiveness (thermal time constant τ = 8 seconds): Use of microchip for thermistor element and optimal design of heat sensor
- 3High accuracy (within ±10°C): Atomization of thermistor materials and uniform mixing
- 4High reliability: Use of highly heat resistant and vibration resistant design means that accuracy change after a reliability test are within ±5°C.
This sensor will be used on vehicles to be released in 1999 in Japan and 2000 in Europe.
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Kurano, A., Takahashi, S., Kuzuoka, K., and Ogata, I., "Development of High Performance Catalyst Temperature Sensor for NOx Catalyst Control," SAE Technical Paper 1999-01-0615, 1999, https://doi.org/10.4271/1999-01-0615.Data Sets - Support Documents
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References
- Code of Federal Regulation Title 40
- Iwamoto M. JSAE 9302097 205
- Car Industry Handbook
- Yanagida H. Ceramics Science