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Skip to Search Results- 1Boddez, Jason Bradley
- 1Bullock, Dallin S
- 1Ebrahimi, Khashayar
- 1Gordon, David
- 1Kirk, Alistair S.
- 1Mashkournia, Masoud
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Fall 2013
In the development of a numerical model for the water cycle on Mars, adsorption of water vapour in the Martian regolith acts as a significant sink and retards the transport of mass. Adsorption on Mars cannot be studied directly, so a numerical model was created, and a diffusion sorption...
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Characterization of Particulate Emissions of Homogeneous Charge Compression Ignition Engines
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The particle size distribution, volatility, and effective density of particulate matter are measured using a cooperative fuel research engine during motoring, spark ignition, and homogeneous charge compression ignition. For all operating modes, less than 5% of the particulate mass remains when...
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Fall 2012
To understand the water cycle on Mars, details of mass and energy transfer between the surface and the atmosphere are of importance. A complete model, involving transient variations of the water in gaseous and solid phases in the atmosphere and the regolith, is developed and solved numerically...
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Effects of Negative Valve Overlap on HCCI Combustion and its use in the Control of HCCI Combustion Timing
DownloadFall 2014
Homogeneous charge compression ignition (HCCI) combustion can produce higher efficiencies and lower emissions when compared to tradition spark or compression ignition engines. This study reports an experimental investigation into the effects of valve timings on HCCI combustion conditions. Using a...
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Fall 2012
An experimental single cylinder engine with variable valve timing is used to study spark ignition and homogeneous charge compression ignition (HCCI). The discrete wavelet transform, on a single cylinder engine with a cam-phasing head, is used in real time for knock detection in HCCI. Classical...
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Spring 2011
Homogeneous Charge Compression Ignition (HCCI) operation is desirable for its high thermal efficiency and low emissions of NOx and particulates. Difficulty with cold starting and maximum achievable speed/load highlight the desire for mode-switching to traditional spark ignition (SI)...
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Spring 2019
Homogeneous Charge Compression Ignition (HCCI) has the potential to significantly reduce oxides of nitrogen NOx emissions, while maintaining a high fuel efficiency compared to existing lean-burn spark ignition engines. HCCI is characterized by compression induced autoignition of a lean...
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Spring 2016
A dual-fuel system is used to control HCCI combustion timing and load in a CFR engine. The systems steady-state response to iso-octane and n-heptane injected energy is investigated then a dynamic ARMAX model is found using system identification. This model is used to design a norm-optimal...
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Fall 2016
Different model based control strategies are developed for combustion timing and load control in a single cylinder Homogeneous Charge Compression Ignition (HCCI) engine. In HCCI engines, a lean homogeneous air-fuel mixture auto-ignites due to compression and the resulting combustion occurs at...
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Fall 2009
Homogeneous Charge Compression Ignition (HCCI) is a promising method for combustion engines to provide a substantial reduction in fuel consumption and formation of both nitrogen oxides and soot pollutants in automotive and stationary engines. Control of HCCI combustion timing is essential for the...