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Analysis of Common Rail Pressure Build-Up and Assistant-Establishment of Engine Phase Position in Starting Process
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 31, 2006 by SAE International in United States
Annotation ability available
Rapid pressure build-up before acquiring the engine phase position is necessary to improve the start performance for a common rail diesel engine. This paper presents a simulation model to describe the pressure build-up process of the DENSO HP0-MD high-pressure pump, with the two pressure-control-solenoid-valves (PCV) are frequently driven in sequence. As the fuel is pumped only when one PCV is energized in its corresponding plunger supply stroke, simulation studies are carried out to analyze the pressure build-up effect of different driving frequency, and the 30Hz frequency is selected as the optimal driving frequency to achieve about 80% fuel supply efficiency for the normal cranking speed range. Additionally, when only the crankwheel signal is useful, a novel method, which checks whether the rail pressure rises in a special PCV energizing zone, is designed to assistant ascertain engine phase.
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CitationXiao, W., Liang, F., Tan, W., Mao, X. et al., "Analysis of Common Rail Pressure Build-Up and Assistant-Establishment of Engine Phase Position in Starting Process," SAE Technical Paper 2006-01-3525, 2006, https://doi.org/10.4271/2006-01-3525.
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