Sökning: "Variable Valve Timing"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden Variable Valve Timing.

1. 1. 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

3. 2. 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

4. 3. 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

5. 4. Optimization of FreeValve´s fully variable valve control system for a four-cylinder engine

   Master-uppsats, KTH/Maskinkonstruktion (Inst.)

   Författare :Robin Hamberg; [2017]
   Nyckelord :;

   Sammanfattning : Automotive exhaust legislation is stricter than ever and manufacturers are spending increasing amounts of resources on reducing fuel consumption and emissions from their vehicles. What most do not try is to change one of the most fundamental concepts of the internal combustion engine. LÄS MER

7. 5. An Alternative Variable Valve Timing System for Heavy Duty Vehicles

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Mikael Eriksson; Daniel Olovsson; [2016]
   Nyckelord :Variable; Valve Timing; VVT; Cam phaser; Heavy Duty; Scania; Commercial Vehicles; GT-SUITE; Dynamic; On off valve; Product Development; Machine Element;

   Sammanfattning : The ability to control engine valve timing has the potential to alter the engine performance over the entire operating range. The outcome of valve timing technology enables the possibility to increase efficiency, lowering emissions, increase engine torque, etc. One of the simplest ways to obtain a variable valve timing is to use cam phasers. LÄS MER