Refine Your Search

Search Results

Viewing 1 to 2 of 2
Technical Paper

Numerical Analysis of Flow Characteristics for Intake Valve Design

2003-05-19
2003-01-2015
Steady flow bench test is a practical, powerful and widely used one for most engine manufacturers to give a design concept of a new engine, especially for the intake system. In order to use the steady data as a performance index, it is necessary to build up massive database, which can correlate the port characteristics with engine data. However, it is hard to investigate all port and valve shapes with experimental tools. The steady flow scheme is relatively simple and its results are bulk ones such as flow rates and momentum of flow. Therefore, computational simulation can easily be applied for evaluation of the intake port and valve designs. In this study, three-dimensional numerical analysis of the steady flow characteristics was performed on intake valve design for comparison with experimental data, which can confirm the feasibility of applying analytic method. For this purpose, the effect of valve curvature on flow rate was estimated using a CFD code.
Technical Paper

Performance Analysis of a Spark Ignited Engine with ETBE as a Blending Agent

1990-08-01
901520
The performance of a SI engine with Ethyl Tertiary Butyl Ether (ETBE) as a blending component was investigated in comparison with other blending components; ethanol and Methyl Tertiary Butyl Ether (MTBE). With oxygenated fuel blends of 2.0 and 3.5 wt. % oxygen content, parametric studies were carried out on emission levels and the overall performance with a General Motors Quad-4 engine. The results of the experiments and the numerical simulation with the computer program, ZMOTTO, show that the new blending component, ETBE, can be compared favorably with the performance and emission levels of the base gasoline, ethanol, and MTBE.
X