Exhaust Gas Pressure Sensors (EGPS) and Exhaust Gas Temperature Sensors (EGTS) are used in a variety of combustion control processes in both petrol and diesel engines to improve fuel consumption and lower emissions.
Exhaust Gas Temperature Sensors monitor selective catalytic reduction (SCR), turbo boost, exhaust gas recirculation and the diesel particulate filter (DPF). The data from the Air Mass Meter (AMM) and the Exhaust Temperature Sensors prompt the ECU to regenerate the DPF in order to prevent and clear blockages, as well as monitoring temperature levels during regeneration.
Thin Film Platinum sensors are proven technology for exhaust gas temperature sensors. The element works on a positive temperature coefficient, so if the sensor’s resistance increases as the exhaust temperature increases. The EGTS measures exhaust temperatures up to 900°C.
The Exhaust Gas Pressure Sensor measures the pressure difference between gas in the intake and the exit of the diesel particulate filter. When these pressures exceed set levels, filter regeneration either happen automatically or a dashboard light will alert the driver to take the vehicle for service.