Global ETD Search
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Showing 1 to 8 of 8 for “"Controlled Auto-Ignition"”.
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Closed-loop, variable-valve-timing control of a controlled-auto-ignition engine
… to develop a closed-loop controller for use on a Controlled-Auto- Ignition (CAI) / Spark-Ignition (SI) mixed mode engine equipped with a variable-valve-timing (VVT) mechanism. The controller in this study was designed only for use in the CAI regime. Operation in the SI regime and control of …
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Knock mitigation on boosted Controlled Auto-Ignition engines with fuel stratification and Exhaust Gas Recycling
… Recycling (EGR) for knock mitigation on boosted Controlled Auto-Ignition (CAl) engines. Experiments were first conducted on Rapid Compression Machine (RCM) to profile the ignition characteristic of the specific fuel used, and to explain the dilution effects of air and inert gas. Then the effect …
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The role of fuel in determining the high load limit of controlled auto-ignition engines
Controlled Auto-Ignition (CAI) engines have the potential to increase fuel economy while lowering nitrogen oxide and soot emissions. One hurdle that is currently being faced is the engine's inability to operate at high loads due to a large Maximum Pressure Rise Rate (MPRR). To address this issue, …
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An Experimental Study of Two-Stroke Cyclic Variation and a Prototype Component Design for Controlled Auto Ignition.
Given the current concern of global warming the automotive industry is under pressure to provide alternative powertrains to improve fuel efficiency and reduce the production of carbon dioxide and associated emissions. 2-stroke engines are known to provide considerable benefits in weight reduction …
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On fuel selection in controlled auto-ignition engines : the link between intake conditions, chemical kinetics, and stratification
… the high-load limit in a stratified Compression Auto-Ignition (CAI) engine. This was accomplished by first studying the validity of the current metrics that predict when the high-load limit is reached. Temperature and fuel concentration stratification, and the degree that they can be used to …
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Managing transient behaviors of a dual mode spark ignition-- controlled auto ignition engine with a variable valve timing system
Gasoline Homogeneous Charge Compression Ignition (HCCI) engine has the potential of providing better fuel economy and emissions characteristics than current spark ignition engines. One implementation of this technology employs a Variable Valve Timing (VVT) system and is also often referred to as …
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Effect of market fuel variation and cetane improvers on CAI combustion in a GDI engine
… emissions. One promising technology is that of Controlled Auto Ignition (CAI) combustion. The lack of direct combustion control makes control of CAI combustion challenging. Practical implementation of CAI an engine, the engine's behavior must be predictable. This work investigates the impact of …
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Non-linear model-based predictive control of a low-temperature gasoline combustion engine
… changes in the ambient conditions move the self-ignition towards disadvantageous timings and a rough combustion. For actuating the combustion in the single-cylinder demonstrator, the valve timings of the electro-mechanical valve train and the direct injection are available. Controlled variables …