Electronic Diesel Control – A Strategy for Euro 3 Optimization

<div class="htmlview paragraph">The stringent emission norms and customer demands on driving comfort, performance etc have made the role of fuel injection equipment much more important. The stringent demands placed on the fuel injection systems are,</div> <div class="htmlview paragraph"> <ul class="list disc"> <li class="list-item"><div class="htmlview paragraph">Flexible control of fuel injection system to meet the engine requirements at all times</div></li> <li class="list-item"><div class="htmlview paragraph">Ability to process the influence of additional parameters</div></li> <li class="list-item"><div class="htmlview paragraph">Sensitive control</div></li> <li class="list-item"><div class="htmlview paragraph">Fine tolerances and increased accuracy even after long periods of operation</div></li> </ul> </div> <div class="htmlview paragraph">These demands can be fulfilled only by Electronic Diesel Control systems.</div> <div class="htmlview paragraph">For electronic systems to play a major role in diesel control, the following requirements have to be met,</div> <div class="htmlview paragraph"> <ul class="list disc"> <li class="list-item"><div class="htmlview paragraph">High precision and reproducibility</div></li> <li class="list-item"><div class="htmlview paragraph">High safety</div></li> <li class="list-item"><div class="htmlview paragraph">Wide working temperature range</div></li> <li class="list-item"><div class="htmlview paragraph">Corrosion resistance</div></li> <li class="list-item"><div class="htmlview paragraph">Vibration resistance</div></li> <li class="list-item"><div class="htmlview paragraph">Interference suppression</div></li> <li class="list-item"><div class="htmlview paragraph">Long working life</div></li> </ul> </div> <div class="htmlview paragraph">During the first decade, diesel technology was concentrated on improving performance and reducing fuel consumption. Today the focus is on stringent requirement regarding environmental compatibility. In the last ten years BOSCH has developed new high-pressure fuel injection systems for truck engines as well as passenger cars. The new electronic controlled injection systems with precise control of injection quantity and timing, along with a highly developed engine management system have made this rapid development possible.</div> <div class="htmlview paragraph">This paper deals with a development of an electronic fuel injection system for a DI engine to meet Euro-3 norms in the commercial vehicle range. Results from developments with 2 different engines are presented. Also this paper brings out the strategy for meeting stringent emissions for Heavy commercial vehicle application with</div> <div class="htmlview paragraph"> <ul class="list disc"> <li class="list-item"><div class="htmlview paragraph">BOSCH electronic diesel control system with various hydraulic variables and</div></li> <li class="list-item"><div class="htmlview paragraph">Engine modification to improve emission levels</div></li> </ul> </div>