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- 1Boddez, Jason Bradley
- 1Bullock, Dallin S
- 1Mashkournia, Masoud
- 1Schleppe, Michael N
- 1Schramm, Alexander E
- 1Shahbakhti, Mahdi
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...
Effects of Negative Valve Overlap on HCCI Combustion and its use in the Control of HCCI Combustion TimingDownload
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...
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...
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)...
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...
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...
High efficiency and low NOx emissions make Homogeneous Charge Compression Ignition (HCCI) promising for use in internal combustion engines. Combining HCCI with Spark Ignition (SI) allows for extension of the engine’s operating range. A Physics-based Mode Switch Model (PMSM) of SI-HCCI mode...