Optical Investigations of the Vaporization Behaviors of Isooctane and an Optical, Non-fluorescing Multicomponent Fuel in a Spark Ignition Direct Injection Engine

2010 ◽  
Author(s):  
Stephen Busch ◽  
Christian Disch ◽  
Heiko Kubach ◽  
Ulrich Spicher
Keyword(s):  
Direct Injection ◽  
Spark Ignition ◽  
Direct Injection Engine

scholarly journals Analysis of exhaust gas flow through a particulate filter in the exhaust of the spark ignition direct injection engine

2019 ◽  
Author(s):  
Paweł Fuć ◽  
Piotr Lijewski ◽  
Barbara Sokolnicka ◽  
Maciej Siedlecki ◽  
Natalia Szymlet
Keyword(s):  
Gas Flow ◽  
Direct Injection ◽  
Spark Ignition ◽  
Particulate Filter ◽  
Exhaust Gas ◽  
Direct Injection Engine ◽  
Flow Through

Cold-Start Computational Fluid Dynamics Simulation of Spark-Ignition Direct-Injection Engine

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Xiaofeng Yang ◽  
Tang-Wei Kuo ◽  
Kulwinder Singh ◽  
Rafat Hattar ◽  
Yangbing Zeng
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Engine Speed ◽  
Direct Injection ◽  
Cold Start ◽  
Spark Ignition ◽  
Dynamics Simulation ◽  
Residual Fraction ◽  
Direct Injection Engine ◽  
Start Process

Reliably starting the engine during extremely cold ambient temperatures is one of the largest calibration and emissions challenges in engine development. Although cold-start conditions comprise only a small portion of an engine's typical drive cycle, large amounts of hydrocarbon and particulate emissions are generated during this time, and the calibration of cold-start operation takes several months to complete. During the cold start period, results of previous cycle combustion event strongly influences the subsequent cycle due to variations in engine speed, residual fraction, residual wall film mass, in-cylinder charge and wall temperatures, and air flow distribution between cylinders. Including all these parameters in computational fluid dynamics (CFD) simulation is critical in understanding the cold start process in transient and cumulative manner. Measured cold start data of a production of four-cylinder spark-ignition (SI) direct-injection engine were collected for this study with an ambient temperature of −30 °C. Three-dimensional (3D) transient engine flow, spray, and combustion simulation over first three consecutive engine cycles is carried out to provide a better understanding of the cold-start process. Measured engine speed and one-dimensional (1D) conjugate heat transfer (CHT) model is used to capture realistic in-cylinder flow dynamics and transient wall temperatures for more accurate fuel–air mixing predictions. The CFD predicted cumulative heat release trend for the first three cycles matches the data from measured pressure analysis. The same observation can be made for the vaporized fuel mass as well. These observations are explained in the report.

scholarly journals The effects of residual gas trapping on part load performance and emissions of a spark ignition direct injection engine fuelled with wet ethanol

2019 ◽  
Vol 253 ◽  
pp. 113508 ◽  
Author(s):  
Thompson Diórdinis Metzka Lanzanova ◽  
Macklini Dalla Nora ◽  
Mario Eduardo Santos Martins ◽  
Paulo Romeu Moreira Machado ◽  
Vinícius Bernardes Pedrozo ◽  
...  
Keyword(s):  
Direct Injection ◽  
Spark Ignition ◽  
Direct Injection Engine ◽  
Part Load ◽  
Gas Trapping ◽  
Performance And Emissions ◽  
Residual Gas
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