National Transport Library Research Database

Virtuella sensorer för gasflöden i tunga dieselmotorer (Virtual Sensors for Gas Flows in Heavy-Duty Diesel Engines)

Sponsors, duration, budget: Vinnova ; 2009-01-01 -- 2010-12-31 ; 1530000 kronorRegistration number:
  • Vinnova 200804096
Subject(s): Abstract: Gasflödesreglering i dieselmotorer är högrelevant. På kort sikt är det genom t.ex. trottelreglering en viktig del för att nå EUROVI-lagkraven. På längre sikt ser vi bara större behov av noggrann kunskap om signaler relaterade till gasflödena inne i motorn, signaler som är svåra att mäta med fysiska sensorer pga av deras fysiska position.Abstract: Engine control systems are today an essential part to achieve legislated exhaust requirements with remained low fuel consumption. These control systems rely both real sensors and virtual sensors (observers) to obtain knowledge of the process state (temperature, gas flow, injected fuel amount, etc). Observers are software that uses readily available measurements to estimate entities that are either impossible or expensive to measure, one example is the amount of oxygen that goes into the engine. The main purpose of this project is to develop techniques for designing observers. A side purpose is to integrate and iterate these techniques in our daily control systems development at Scania CV. Gas flow control in diesel engines is today a high priority project. In the short term, throttle control is an important part to achieve the EUROVI-regulations. In the long term, there is no doubt a need for more precise knowledge of the gas flows inside the engine that are hard to measure using real sensors due to there physical location.
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