Second Generation Platinum RTD Exhaust Gas Temperature Sensor for -50°C to 1000°C Measurement

Ultra Low Emission Vehicle (ULEV) and proposed Super Low Emission Vehicle (SULEV) requirements along with Lean Burn Systems will require improved Engine Management Systems and new catalyst technologies. High performance, reliable exhaust gas/catalyst temperature sensors are one of the key enabling technologies needed for these next generation engine management systems and catalysts. The demand for accurate, high temperature Exhaust Gas Temperature Sensors (EGTS) is growing quickly. Gasoline direct injection engine lean NOx catalyst traps, On Board Diagnostic catalyst monitoring systems, Diesel engine active lean NOx catalyst systems and large Diesel engine diagnostics and protection functions all require accurate measurement of exhaust gas temperature over a wide range. Added to these requirements are the need for short response times, low production costs, and a high sensitivity linear signal for direct input into engine management controllers. This paper describes the development of a second generation RTD exhaust gas temperature sensor that satisfies these demands.