Intake-Port Design for Mitsubishi GDI Engine to Realize Distinctive In-Cylinder Flow and High Charge Coefficient

2000 ◽  
Author(s):  
K. Kuwahara ◽  
T. Watanabe ◽  
H. Tanada ◽  
K. Ueda ◽  
H. Ando ◽  
...  
Keyword(s):  
Intake Port ◽  
High Charge ◽  
Port Design ◽  
Gdi Engine ◽  
Cylinder Flow

Effects of Intake Port Design and Valve Lift on In-Cylinder Flow and Burnrate

1987 ◽  
Author(s):  
J. C. Kent ◽  
M. Haghgooie ◽  
A. Mikulec ◽  
G. C. Davis ◽  
R. J. Tabaczynski
Keyword(s):  
Valve Lift ◽  
Intake Port ◽  
Port Design ◽  
Cylinder Flow

The Effect of Injector and Intake Port Design on In-Cylinder Fuel Droplet Distribution, Airflow and Lean Burn Performance for a Honda VTEC-E Engine

1996 ◽  
Author(s):  
N. E. Carabateas ◽  
A. M. K. P. Taylor ◽  
J. H. Whitelaw ◽  
Kiyoshi Ishii ◽  
Kazuo Yoshida ◽  
...  
Keyword(s):  
Intake Port ◽  
Fuel Droplet ◽  
Lean Burn ◽  
Droplet Distribution ◽  
Port Design

Numerical Analysis of Swirl Control Strategies in a Four Valve HSDI Diesel Engine

2004 ◽  
Author(s):  
S. Fontanesi ◽  
E. Mattarelli ◽  
L. Montorsi
Keyword(s):  
Flow Field ◽  
Control Strategies ◽  
Cfd Simulations ◽  
Full Load ◽  
Partial Load ◽  
Swirl Intensity ◽  
Port Design ◽  
Current Production ◽  
Hsdi Diesel Engine ◽  
Cylinder Flow

Recent four value HSDI Diesel engines are able to control the swirl intensity, in order to enhance the in-cylinder flow field at partial load without decreasing breathing capabilities at full load. Making reference to a current production engine, the purpose of this paper is to envestiage the influence of port design and flow-control strategies on both engine permeability and in-cylinder flow field. Using previously validated models, 3-D CFD simulations of the intake and compression strokes are performed in order to predict the in-cylinder flow patterns originated by the different configurations. The comparison between the two configurations in terms of airflow at full load indicates that Geometry 2 can trap 3.03% more air than Geometry 1, while the swirl intensity at IVC is reduced (−30%). The closure of one intake valve (the left one) is very effective to enhance the swirl intensity at partial load: the Swirl Ratio at IVC passes from 0.7 to 2.6 for Geometry 1, while for Geometry 2 it varies from 0.4 to 2.9.

scholarly journals A Design of the Compression Chamber and Optimization of the Sealing of a Novel Rotary Internal Combustion Engine Using CFD

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2362
Author(s):  
Savvas Savvakis ◽  
Dimitrios Mertzis ◽  
Elias Nassiopoulos ◽  
Zissis Samaras
Keyword(s):  
Internal Combustion Engine ◽  
Cfd Simulation ◽  
Combustion Engine ◽  
Numerical Study ◽  
Simulation Models ◽  
Internal Combustion ◽  
Intake Port ◽  
Significant Difference ◽  
Port Design ◽  
Compression Chamber

The current paper investigates two particular features of a novel rotary split engine. This internal combustion engine incorporates a number of positive advantages in comparison to conventional reciprocating piston engines. As a split engine, it is characterized by a significant difference between the expansion and compression ratios, the former being higher. The processes are decoupled and take place simultaneously, in different chambers and on the different sides of the rotating pistons. Initially, a brief description of the engine’s structure and operating principle is provided. Next, the configuration of the compression chamber and the sealing system are examined. The numerical study is conducted using CFD simulation models, with the relevant assumptions and boundary conditions. Two parameters of the compression chamber were studied, the intake port design (initial and optimized) and the sealing system size (short and long). The best option was found to be the combination of the optimized intake port design with the short seal, in order to keep the compression chamber as close as possible to the engine shaft. A more detailed study of the sealing system included different labyrinth geometries. It was found that the stepped labyrinth achieves the highest sealing efficiency.

Effect of Intake Port Design on the Flow Field Stability of a Gasoline DI Engine

2011 ◽  
Author(s):  
Philipp Adomeit ◽  
Markus Jakob ◽  
Stefan Pischinger ◽  
Andre Brunn ◽  
Jens Ewald
Keyword(s):  
Flow Field ◽  
Intake Port ◽  
Port Design

Optimization of the intake port shape for a five-valve gasoline engine

2001 ◽  
Vol 215 (6) ◽  
pp. 739-746 ◽  
Author(s):  
K Lee ◽  
C Lee ◽  
Y Joo
Keyword(s):  
High Efficiency ◽  
Gasoline Engine ◽  
Three Dimensional ◽  
Design Guidelines ◽  
Design Parameters ◽  
Computer Assisted ◽  
Intake Port ◽  
Port Design ◽  
Visualization Experiments ◽  
Valve Engine

For the development of a high efficiency gasoline engine, the optimization of the intake port shape for a five-valve engine has been studied. Intake multivalve cylinder heads were manufactured by using a three-dimensional computer-assisted design program, and steady state flow experiments and flow visualization experiments have been performed with these cylinder heads. The five-valve engines, which have larger valve opening areas, have larger intake flowrates and higher tumble ratios than the four-valve engines. The effects of intake port design parameters of a five-valve engine on the intake flowrate and tumble were studied, and the design guidelines for the five-valve engines were established.

New evaluation indices for bulk motion of in-cylinder flow through intake port system in cylinder head

2002 ◽  
Vol 216 (6) ◽  
pp. 513-521 ◽  
Author(s):  
J-E Yun
Keyword(s):  
Flow Parameter ◽  
Flow Coefficient ◽  
Intake Port ◽  
Flow Angle ◽  
Bulk Motion ◽  
Flow Test ◽  
Port Systems ◽  
Port System ◽  
Flow Through ◽  
Cylinder Flow

The purpose of this study is to find new evaluation indices for the bulk motion of in-cylinder flow instead of the current swirl or the tumble coefficient and ratio using a steady flow test rig on intake port systems. To do this, port flow rig tests were conducted on the double-overhead cam head. Finally, the angular flow coefficient (NA), the inclination angle (γ) the angular flow parameter (PA) and the flow angle (φ) were introduced as new evaluation indices for the bulk motion of in-cylinder flow.

Full-Parameter Approach for the Intake Port Design of a Four-Valve Direct-Injection Gasoline Engine

2015 ◽  
Vol 137 (9) ◽  
Author(s):  
Lei Cui ◽  
Tianyou Wang ◽  
Zhen Lu ◽  
Ming Jia ◽  
Yanzhe Sun
Keyword(s):  
Large Scale ◽  
High Efficiency ◽  
Gasoline Engine ◽  
Direct Injection ◽  
Critical Role ◽  
Intensity Change ◽  
Intake Port ◽  
Structure Parameters ◽  
Parametric Approach ◽  
Port Design

The design of the intake port plays a critical role in the development of modern internal combustion (IC) engines. The traditional method of the intake port design is a time-consuming process including a huge amount of tests and the production of core box. Compared with the traditional methods, parametric approach attracts increasing attentions by virtue of its high-efficiency, traceability, and flexibility. Based on a tangential port model created by a three-dimensional (3D) computer aided design (cad) software, a new tangential port can be quickly generated with different sets of structure parameters, then computational fluid dynamics (CFD) was employed to explore the influence of structure parameters on the intake port performance. The results show that the flow capacity and the large-scale vortex intensity change regularly with the variations of structure parameters. Finally, the parametric approach was employed to design the intake port of a production four-valve direct-injection (DI) gasoline engine, and the good applicability this approach is well illustrated.

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