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Showing result 1 - 5 of 6 essays matching the above criteria.

  1. 1. Implementation of a Model Predictive Controller in a Spark-Ignition Engine

    University essay from Linköpings universitet/Fordonssystem

    Author : Gustav Mann; Jakob Luedtke; [2021]
    Keywords : Model Predictive Control; SI engine; Variable Valve Timing; Throttle;

    Abstract : The propulsion of the spark-ignition engine has been investigated and developed during the past century to improve driveability, minimize fuel consumption and emissions, resulting in highly engineered and computerized powertrains. Well balanced engine maps containing coordinated set-points and model-based information sharing have solved the cross-coupling between different control loops. READ MORE

  3. 2. Physically Based Modelling for Knock Prediction in SI Engines

    University essay from Linköpings universitet/Fordonssystem

    Author : Nils Thornberg; Jonas Eriksson Kraft; [2018]
    Keywords : knock; engine; si; si-engine; prediction; modelling; heat; release; knack;

    Abstract : The high demand for an increase in performance and at the same time loweringthe emissions is forcing the automotive industry to increase the efficiency of thevehicles. This demand lead to a problem called knock, which often is the limitingfactor when increasing the efficiency of the engine. READ MORE

  4. 3. Effects and Models of Water Injection in an SI Engine

    University essay from Linköpings universitet/Fordonssystem

    Author : Joel Westling; Haris Subasic; [2018]
    Keywords : ;

    Abstract : Downsizing and turbocharging is a popular combination nowadays in cars inorder to decrease the fuel consumption. However, the boost pressure increasesthe risk of engine knock, limiting the engine in high-load operating points. Inthe current engines, fuel is used to cool the engine in these operating points,leading to a higher fuel consumption. READ MORE

  5. 4. Development of an HCCI index

    University essay from Lunds universitet/Institutionen för energivetenskaper

    Author : Filippa Olsson; Tove Vang; [2009]
    Keywords : HCCI index; fuel index; combustion in fuels; Technology and Engineering;

    Abstract : New models of combustion engines have gained a great interest within research in the last decade. This interest has arisen due to the possibility to achieve a higher degree of efficiency and lower emissions, which will impact the environment positively. A higher degree of efficiency implicates an economical benefit in terms of fuel. READ MORE

  6. 5. Ion Current Dependence on Operating Condition and Ethanol Ratio

    University essay from Institutionen för systemteknik

    Author : Karin Gustafsson; [2006]
    Keywords : SI engine; black box modeling; engine speed; engine load; ignition timing;

    Abstract : This masters thesis investigates the possibility to estimate the ethanol content in the fuel using ion currents. Flexible fuel cars can be run on gasoline-ethanol blends with an ethanol content from0 to 85 percentage. It is important for the engine control system to have information about the fuel. READ MORE