Study of High Speed Gasoline Direct Injection Compression Ignition (GDICI) Engine Operation in the LTC Regime

Analysis of exergy loss of gasoline surrogate combustion process based on detailed chemical kinetics

“…Exergy loss for gasoline fuel combustion Fig. 2 shows the calculated overall Ex loss rate, Ex loss rate of individual reactions, and exergy loss for an adiabatic, constant volume combustion process fueled with a gasoline surrogate at an initial charge temperature (T in ) of 800 K, initial pressure (P in ) of 45 atm, oxygen concentration ([O 2 ]) of 21%, and equivalence ratio (U) of 0.3, which is close to the condition at the top dead center of a naturally aspirated homogeneous charge compression ignition (HCCI) engine with a compression ratio (CR) of 17 that is consistent with the investigations by Reitz et al [27,28] of direct injection (DI) compression ignition (CI) engine combustion fueled with gasoline aiming to extend the operation ranges for a light-duty diesel engine. As seen in Fig.…”

New premixed compression ignition concept for direct injection IC engines fueled with straight-run naphtha

“…The engine is operated in gasoline partially premixed compression ignition (PPCI) mode, where the stratification of fuel concentration plays a key role, and high efficiency and power density and low emissions have been achieved. This concept has been researched subsequently by Reitz et al [7][8][9][10], Johansson et al [11][12][13][14][15][16][17][18], Weall and Collings [19], Zhang et al [20], Sellnau et al [21], and Dec et al [22] on high octane number fuels in PPCI mode with different EGR rates, different intake temperatures and boosting pressures under different loads and speeds.…”

A combustion model for multi-component fuels using a physical surrogate group chemistry representation (PSGCR)

“…Also, the predicted ignition delay times were compared with those obtained using other mechanisms available in the literature. Simulations of HCCI engine combustion and CVCC spray combustion were performed using the multi-dimensional KIVA-3V code coupled with the CHEMKIN library and with physical sub-models developed at the Engine Research Center of the University of Wisconsin [26].…”

“…Figure 22(a) shows the computational grid used in the simulations. The computation was performed using the KIVA-ERC-CHEMKIN code [26]. Figure 23 shows a comparison of the predicted pressure and heat release rate profiles with the experimental data for the four FACE fuels.…”

“…Uniform liquid temperatures in the batch distiller (e.g., by using a stirrer) are effectively modeled by setting a uniform temperature in a drop, and the temperature change near the liquid/vapor interface can be modeled by the temperature change from a superheated liquid in the drop interior, to the boiling temperature [24]. The models were implemented into an in-house CFD code, KIVA-ERC-CHEMKIN [26], and applied to simulate the distillation profiles of the fuel of interest. All the thermo-physical properties of the representative hydrocarbon species were taken from Daubert and Danner [27] and were incorporated in the code's fuel library.…”