{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

HCCI Modeling - Background HCCI Intakes pre-mixed fuel-air...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
HCCI Background Intakes pre-mixed fuel-air charge Compression initiates combustion No discernable flame front Ultra-low NOx & PM emissions Unlike SI or CI engines, HCCI requires advanced control strategies for proper control of combustion phasing. A model which captures the key dynamics of the HCCI process is essential to achieve this control. Modeling the onset of combustion is difficult due to its dependence on chemical kinetics through reactant concentrations and temperature. Control-oriented models must remain as simplistic as possible while still capturing the key dynamics of the process.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Model Development Five state thermodynamic cycle Adiabatic, constant pressure induction Isentropic compression Constant volume combustion Isentropic expansion Isentropic blowdown to an adiabatic, constant pressure exhaust Stoichiometry modeled using C/H = 7/16 Gasoline-type fuels (exhibit little low temperature heat release (LTHR)) Extension to other fuels possible
Background image of page 2
Model Development Engine cycle begins with compression.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 10

HCCI Modeling - Background HCCI Intakes pre-mixed fuel-air...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online