Essays about: "Variable Valve Timing"
Showing result 1 - 5 of 8 essays containing the words Variable Valve Timing.
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1. Model-Predictive Control of Gas Exchange in a Gasoline Engine
University essay from Linköpings universitet/FordonssystemAbstract : 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. READ MORE
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2. Implementation of a Model Predictive Controller in a Spark-Ignition Engine
University essay from Linköpings universitet/FordonssystemAbstract : 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
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3. Estimation of Air Mass Flow in Engines with Variable Valve Timing
University essay from Linköpings universitet/ReglerteknikAbstract : 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. READ MORE
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4. Optimization of FreeValve´s fully variable valve control system for a four-cylinder engine
University essay from KTH/Maskinkonstruktion (Inst.)Abstract : 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. READ MORE
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5. An Alternative Variable Valve Timing System for Heavy Duty Vehicles
University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematikAbstract : 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. READ MORE