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Journal Article

Smart Soot Sensor for Particulate Filter OBD

2013-04-08
2013-01-1334
In the frame of tighter emission requirements and environmental protection, future standards will soon lead to the use of an OBD soot sensor to monitor DPF leakage. Such a sensor will first be introduced in the US by MY 2015 and then in Europe for Euro 6.2 in 2017. The resistive ceramic sensing technology has been selected by most OEM as the most appropriate. The sensor collects the soot in a time cumulative manner and has an internal heater to clean the ceramic before each measurement sequence. The actual challenge of the hardware is to design a wide band collecting system with a high sensitivity and repeatability circuit processing. Electricfil has overcome major drawbacks of the resistive technology with an innovative sensor tip, with filtration features and a boosting electronic scheme. This sensor integrates internal diagnostic capability at power on and during operation.
Technical Paper

Rotor Position Sensor for Hybrid Drives and Electric Drives New Generation Eddy Current Position Sensor

2011-04-12
2011-01-0441
Electrification of the power train will play a key role in the struggle for higher energy efficiencies and reduced emissions of vehicles. Optimized control of modern electric motors requires precise measurement of the rotor position. In most industrial applications optoelectronic or magnetic incremental sensors or inductive resolves are used for the position measurement. Deploying electric drives in cars, however, adds additional requirements concerning robustness, manufacturing costs, integration and operating safety which are difficult to satisfy with traditional sensor technology. The drawbacks of current sensor technologies like high costs or sensibility to EMI will not be acceptable any more when electric power trains go into mass production. Electricfil has developed an Electric Motor Position Sensor (EMPOS) that provides a number of advantages over traditional sensors, including very high robustness to mechanical tolerances, a digital interface and low production costs [1].
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