Sökning: "Valve Timing"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Valve Timing.

  1. 1. RF Compressor (SLED) Phase-Modulation to Reduce Peak Fields in the MAX IV Linear Accelerator

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Joel Ekström; [2023]
    Nyckelord :Accelerator; MAX IV; LINAC; Phase-modulation; SLED; Pulse compression; Technology and Engineering;

    Sammanfattning : Modern particle accelerators need strong electric fields in order to produce high energy particles. Such high voltages are typically reached by injecting pulsed radio frequency power through several steps of amplification. At the end, pulse compression is used to further improve the energy gain at the cost of pulse-length. LÄS MER

  3. 2. Model-Predictive Control of Gas Exchange in a Gasoline Engine

    Master-uppsats, Linköpings universitet/Fordonssystem

    Författare :George Jajji; [2021]
    Nyckelord :Control Engineering; Model Predictive Control; MPC; Gasoline Engine; Gas Exchange;

    Sammanfattning : The process to induct air into engine cylinders, via the air inlet system and cylin-der port valves, is referred to as the "gas-exchange". Control is achieved by theturbo-charger, the intake throttle plate and the variable valve timing (VVT) sys-tem. These actuation systems traditionally use separate control with indepen-dent SISO feedback. LÄS MER

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

    Master-uppsats, Linköpings universitet/Fordonssystem

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

    Sammanfattning : 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. LÄS MER

  5. 4. The Miller Cycle on Single-Cylinder and Serial Configurations of a Heavy-Duty Engine

    Master-uppsats, KTH/Förbränningsmotorteknik

    Författare :Varun Venkataraman; [2018]
    Nyckelord :Two-stage turbocharging; modelling and simulation; GT-Power; performance; Miller cycle; heavy-duty diesel engine; Tvåstegs turboladdning; modellering och simulering; GT-Power; prestanda; Miller-cykel; lastbils dieselmotor;

    Sammanfattning : I jämförelse med sina föregångare, har moderna lastbilsmotorer genomgått en betydandeutveckling och har utvecklats till effektiva kraftmaskiner med låga utsläpp genom införandet avavancerade avgasbehandlingssystem. Trots att de framsteg som gjorts under utvecklingen av lastbilsmotorer har varit betydande, så framhäver de framtida förväntningarna vad gällerprestanda, bränsleförbrukning och emissioner behovet av snabba samt storskaliga förbättringar av dessa parametrar för att förbränningsmotorn ska fortsätta att vara konkurrenskraftig och hållbar. LÄS MER

  7. 5. Estimation of Air Mass Flow in Engines with Variable Valve Timing

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Elina Fantenberg; [2018]
    Nyckelord :Diesel Engine; Variable Valve Timing; Air Mass Flow;

    Sammanfattning : To control the combustion in an engine, an accurate estimation of the air mass flow is required. Due to strict emission legislation and high demands on fuel consumption from customers, a technology called variable valve timing is investigated. LÄS MER