Exhaust Emissions from a Direct-Injection Spark-Ignition (DISI) Engine Equipped with an Air-Forced Fuel Injector

2000 ◽  
Author(s):  
Edward W. Kaiser ◽  
Aine M. Lawler ◽  
Walter O. Siegl ◽  
Ruben H. Munoz ◽  
Jailin Yang ◽  
...  
Keyword(s):  
Direct Injection ◽  
Exhaust Emissions ◽  
Spark Ignition ◽  
Fuel Injector ◽  
Direct Injection Spark Ignition

scholarly journals Fuel injector deposits in direct-injection spark-ignition engines

2015 ◽  
Vol 50 ◽  
pp. 63-80 ◽  
Author(s):  
Hongming Xu ◽  
Chongming Wang ◽  
Xiao Ma ◽  
Asish K. Sarangi ◽  
Adam Weall ◽  
...  
Keyword(s):  
Direct Injection ◽  
Spark Ignition ◽  
Spark Ignition Engines ◽  
Fuel Injector ◽  
Direct Injection Spark Ignition

Soot Development in an Optical Direct Injection Spark Ignition Engine Fueled with Isooctane

2021 ◽  
Vol 22 (2) ◽  
pp. 455-463
Author(s):  
Fangxi Xie ◽  
Miaomiao Zhang ◽  
Yongzhen Wang ◽  
Yan Su ◽  
Wei Hong ◽  
...  
Keyword(s):  
Direct Injection ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Direct Injection Spark Ignition

G-equation based ignition model for direct injection spark ignition engines

2021 ◽  
pp. 146808742110139
Author(s):  
Arun C Ravindran ◽  
Sage L Kokjohn ◽  
Benjamin Petersen
Keyword(s):  
Heat Release ◽  
Direct Injection ◽  
Turbulent Flame ◽  
Spark Ignition ◽  
Discharge Process ◽  
Flame Kernel ◽  
Turbulent Flame Speed ◽  
Direct Injection Spark Ignition ◽  
Kernel Growth ◽  
Spark Energy

To accurately model the Direct Injection Spark Ignition (DISI) combustion process, it is important to account for the effects of the spark energy discharge process. The proximity of the injected fuel spray and spark electrodes leads to steep gradients in local velocities and equivalence ratios, particularly under cold-start conditions when multiple injection strategies are employed. The variations in the local properties at the spark plug location play a significant role in the growth of the initial flame kernel established by the spark and its subsequent evolution into a turbulent flame. In the present work, an ignition model is presented that is compatible with the G-Equation combustion model, which responds to the effects of spark energy discharge and the associated plasma expansion effects. The model is referred to as the Plasma Velocity on G-surface (PVG) model, and it uses the G-surface to capture the early kernel growth. The model derives its theory from the Discrete Particle Ignition (DPIK) model, which accounts for the effects of electrode heat transfer, spark energy, and chemical heat release from the fuel on the early flame kernel growth. The local turbulent flame speed has been calculated based on the instantaneous location of the flame kernel on the Borghi-Peters regime diagram. The model has been validated against the experimental measurements given by Maly and Vogel,1 and the constant volume flame growth measurements provided by Nwagwe et al.2 Multi-cycle simulations were performed in CONVERGE3 using the PVG ignition model in combination with the G-Equation-based GLR4 model in a RANS framework to capture the combustion characteristics of a DISI engine. Good agreements with the experimental pressure trace and apparent heat-release rates were obtained. Additionally, the PVG ignition model was observed to substantially reduce the sensitivity of the default G-sourcing ignition method employed by CONVERGE.

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