Essays about: "lambda control"

Showing result 16 - 20 of 22 essays containing the words lambda control.

  1. 16. An Investigation of Maximum Brake Torque Timing based on Ionization Current Feedback

    University essay from Institutionen för systemteknik

    Author : Janek Magnusson; [2007]
    Keywords : MBT timing; maximum brake torque; spark advance; PPP; tändningstidpunkt; maximalt arbete; MBT; jonström; jonströmsåterkoppling; PPP;

    Abstract : For every operating condition of an internal combustion engine there exists an optimal spark timing, called maximum brake torque (MBT), which maximises the output torque and the efficiency of the engine. Traditionally MBT timing is implemented as an open-loop control where the ignition timing is found by using a combination of static lookup tables and sensor information. READ MORE

  3. 17. 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

  4. 18. Control Oriented Modeling of the Dynamics in a Catalytic Converter

    University essay from Institutionen för systemteknik

    Author : Jenny Johansson; Mikaela Waller; [2005]
    Keywords : catalytic converter; TWC; oxygen storage; lambda; observer; EKF; modeling; simulation; syrelagring; lambda; observatör; EKF; modellering; simulering; katalysator; TWC;

    Abstract : Avgasmängden som bensindrivna fordon tillåts släppa ut minskas hela tiden. Ett sätt att möta framtida krav, är att förbättra katalysatorns effektivitet. För att göra detta kan luft-bränsle-förhållandet regleras med avseende på syrelagringen i katalysatorn, istället för som idag, reglera mot stökiometriskt blandningsförhållande. READ MORE

  5. 19. Gas flow observer for Diesel Engines with EGR

    University essay from Institutionen för systemteknik

    Author : Fredrik Swartling; [2005]
    Keywords : Technology; EGR; Mean Value Engine Model; Observer; Lambda; TEKNIKVETENSKAP;

    Abstract : Due to stricter emission legislation, there is a need for more efficient control of diesel engines with exhaust gas recirculation(EGR). In particular, it is important to estimate the air/fuel ratio accurately in transients. Therefore a new engine gas flow model has been developed. READ MORE

  6. 20. Air/Fuel Ratio Control of an SI-Engine Under Normal Operation Conditions

    University essay from Institutionen för systemteknik

    Author : Anna Rosén; [2004]
    Keywords : Reglerteknik; SI-engine; lambda-control; Smith Predictor; signal fusion; Reglerteknik;

    Abstract : Emission from cars today is one of the biggest environmental issues, hence stringent government standards have been introduced to decrease emission. Car companies do not only have to satisfy government standards, but also meet consumer demands on increased fuel economy and good drivablility. READ MORE