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| 2. |
- Gustafsson, Thomas, 1975-, et al.
(författare)
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Database Functionality in Engine Management System
- 2006
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Ingår i: SAE World Congress,2006. - Proceedings of Software/Hardware Systems SAE World Congress 2006 : SAE.
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Konferensbidrag (refereegranskat)abstract
- Embedded systems of today need to manage more data than ever before. The main reasons for the increase in number of data items are increased functional requirements on the software. With a larger amount of data to manage comes the problems of storing data and its meta-information, sharing between programmers which data items exist, and ensuring freshness and consistency requirements of the data items. In this work we focus on efficient data management in embedded systems, and develop a database for such systems. The database has support for transactions, snapshots, and data freshness. We argue that the software maintenance efforts can be reduced using a database, and our performance results show that the performance can be increased without affecting consistency of data values.
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| 3. |
- Tobias, Peter, et al.
(författare)
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Moving gas outlets for the evaluation of fast gas sensors
- 1998
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Ingår i: EUROSENSORS XII, VOLS 1 AND 2. - : IOP PUBLISHING LTD. - 0750305363 ; , s. 761-764
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Konferensbidrag (refereegranskat)abstract
- It is shown that platinum thin-insula :or-silicon carbide Schottky diodes operated at about 600 degrees C are fast enough to monitor the air fuel ratio in the individual cylinders in the exhaust from a petrol engine. These chemical sensors have time constants of the order of 1 ms. We describe a simple laboratory technique, which can be used to change the gas composition at a chemical sensor within milliseconds. It is based on mechanically oscillating gas outlets placed close to the sensor surface. The properties of and possibilities with such "moving gas outlets" are described.
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| 4. |
- Tobias, Peter, et al.
(författare)
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Moving gas outlets for the evaluation of fast gas sensors
- 1999
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Ingår i: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 58:1-3, s. 389-393
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Tidskriftsartikel (refereegranskat)abstract
- A new method for the evaluation of fast gas sensors is described. By using moving gas outlets, we can quickly change the ambient around a sensor. Different platinum-insulator-silicon carbide (MISiC) structures are investigated. Their sensor response contains fast components, which respond within milliseconds to a change in the ambient from a reducing gas to an oxidising gas and vice versa. Cylinder specific monitoring of car engines with the MISiC structures is discussed.
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