Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Cycle by cycle variations"”.
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Measurement and modelling of combustion in a spark ignition engine
A study has been conducted into the causes of cycle by cycle variations in combustion within a spark ignition engine, the best measured engine parameter to use for its characterization, and the effects that: ignition timing, equivalence ratio, fuel type, throttle position and knock, have upon it. A …
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Research on late-robust combustion
… the role that turbulence plays in causing cycle-by-cycle variations, an experimental study was carried out in which charge motion or laminar flame speed was varied. Two sets of tests were done. The first consisted of using an air jet mounted in the intake port to generate charge motion at a …
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Discovery of acoustic emission based biomarker for quantitative assessment of knee joint ageing and degeneration
… phases in the sit-to- stand movement, followed by the descending-acceleration and descending-deceleration phases in the stand-to-sit movement. Through the quantitative assessment of joint angle signals based on the four-phase model established, statistical differences of different knee …
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An Investigation into Improving the Repeatability of Steady- State Measurements from Nonlinear Systems. Methods for measuring repeatable data from steady-state engine tests were evaluated. A comprehensive and novel approach to acquiring high quality steady-state emissions data was developed
… art instrumentation are necessary to monitor the cycle-by-cycle variations that significantly alter emissions measurements. Test methodologies that consider emissions formation mechanisms invariably focus on thermal transients and preconditioning of internal surfaces. This work sought data quality …
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More effective use of fuel octane in a turbocharged gasoline engine : combustion, knock, vehicle impacts
… been attempts to use octane more effectively by means of Octane on Demand (OOD): higher octane fuel is used only when needed. Engine experiments were performed to understand the combustion characteristics and knock limits of a commercially available turbocharged spark ignition engine. By …