High Pressure Gasoline Direct Injection in Spark Ignition Engines - Efficiency Optimization through Detailed Process Analyses

Abstract Sandvik Pressurfect is an austenitic chromium-nickel stainless steel with low carbon content used for high-pressure gasoline direct injection (GDI) fuel system. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: SS-1195. Producer or source: Sandvik Steel Company.

Download Full-text

Application of Flame Speed Closure Model to RANS Simulations of Stratified Turbulent Combustion in a Gasoline Direct-Injection Spark-Ignition Engine

Combustion Science and Technology ◽

10.1080/00102202.2015.1083988 ◽

2015 ◽

Vol 188 (1) ◽

pp. 98-131 ◽

Cited By ~ 7

Author(s):

C. Huang ◽

E. Yasari ◽

L. C. R. Johansen ◽

S. Hemdal ◽

A. N. Lipatnikov

Keyword(s):

Turbulent Combustion ◽

Direct Injection ◽

Spark Ignition ◽

Flame Speed ◽

Spark Ignition Engine ◽

Gasoline Direct Injection ◽

Closure Model ◽

Rans Simulations ◽

Direct Injection Spark Ignition

Download Full-text

LES study on mixing and combustion in a Direct Injection Spark Ignition engine

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles ◽

10.2516/ogst/2018028 ◽

2018 ◽

Vol 73 ◽

pp. 32

Author(s):

Nicolas Iafrate ◽

Anthony Robert ◽

Jean-Baptiste Michel ◽

Olivier Colin ◽

Benedicte Cuenot ◽

...

Keyword(s):

Ignition Time ◽

Direct Injection ◽

Combustion Process ◽

Spark Ignition ◽

Spark Ignition Engine ◽

Pollutant Emissions ◽

Spark Ignition Engines ◽

Eddy Simulation ◽

Mixture Preparation ◽

The Impact

Downsized spark ignition engines coupled with a direct injection strategy are more and more attractive for car manufacturers in order to reduce pollutant emissions and increase efficiency. However, the combustion process may be affected by local heterogeneities caused by the interaction between the spray and turbulence. The aim for car manufacturers of such engine strategy is to create, for mid-to-high speeds and mid-up-high loads, a mixture which is as homogeneous as possible. However, although injection occurs during the intake phase, which favors homogeneous mixing, local heterogeneities of the equivalence ratio are still observed at the ignition time. The analysis of the mixture preparation is difficult to perform experimentally because of limited optical accesses. In this context, numerical simulation, and in particular Large Eddy Simulation (LES) are complementary tools for the understanding and analysis of unsteady phenomena. The paper presents the LES study of the impact of direct injection on the mixture preparation and combustion in a spark ignition engine. Numerical simulations are validated by comparing LES results with experimental data previously obtained at IFPEN. Two main analyses are performed. The first one focuses on the fuel mixing and the second one concerns the effect of the liquid phase on the combustion process. To highlight these phenomena, simulations with and without liquid injection are performed and compared.

Download Full-text