2020
DOI: 10.1177/1468087420929488
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Computationally efficient evaluation of optimum homogeneous charge compression ignition operating range with accelerated multizone engine cycle simulation

Abstract: The very intensive calculations necessary to define a performance map requiring evaluation of over a hundred individual operating points can be efficiently conducted with accelerated multizone for engine cycle simulation, leading to a definition of regions of acceptable and optimum homogeneous charge compression ignition operation. Accelerated multizone for engine cycle simulation has the virtue of enabling accurate evaluation of many operating conditions based on thermal stratification data from a single flui… Show more

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Cited by 5 publications
(7 citation statements)
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“…Since the pressure is uniform, the mass that crosses the zonal boundaries is calculated using the ideal gas law. Instead, the Lagrangian model [33][34][35][36][37][38][39] is developed on a control mass basis (each zone has a specified constant mass) and no information is given on zone's position inside the combustion chamber. Here, the ideal gas law allows the computation of the zonal volume.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Since the pressure is uniform, the mass that crosses the zonal boundaries is calculated using the ideal gas law. Instead, the Lagrangian model [33][34][35][36][37][38][39] is developed on a control mass basis (each zone has a specified constant mass) and no information is given on zone's position inside the combustion chamber. Here, the ideal gas law allows the computation of the zonal volume.…”
Section: Methodsmentioning
confidence: 99%
“…Either two zone, the core and the boundary layer [24]) or many zones (up to thirty [25]) can be specified. The multi-zone schematization improves the prediction capabilities since it allows to compute a temperature gradient between the zones, ensuring a progressive ignition of the charge [26][27][28][29][30][31][32][33][34][35][36][37][38][39]49]. It is known that the thermal stratification before ignition is primarily developed by heat loss to the cylinder walls, with little contribution from mixing with internal residuals [35].…”
Section: Introductionmentioning
confidence: 99%
“…The start of combustion (SOC) is controlled primarily by the fuel chemical kinetics, which, in turn, depends upon the evolution of the in-cylinder pressure and the temperature history. 64,65 Thus, precise control is difficult to achieve over a wide range of engine speeds and loads. The intake air temperature, exhaust gas recirculation amount, and utilizing fuel blends with optimal reactivity are indirect controllers of SOC and combustion rate in HCCI.…”
Section: Types Of Diesel Ltc Strategymentioning
confidence: 99%
“…For instance, re-induction can be achieved by reopening the exhaust valve during the intake stroke, hence some of the exhaust gas is reinducted into the cylinder along with the fresh charge. 24,26,27 On the other hand, early closing of the exhaust valve and late opening of the intake valve, also known as negative valve overlap (NVO) [28][29][30][31][32][33] leads to retention of burned charge inside the cylinder. Stability analysis is conducted based on an HCCI engine with high dilution reinducted by a second opening of the exhaust valve during the intake stroke.…”
Section: Introductionmentioning
confidence: 99%