The Directstart: Investigation of Mixture Formation by Means of Optical Measurements and 3D-CFD-Simulation Robert Bosch GmbH, Germany

Format:

Conference/Event

Author/Creator:

Zuelch, C., author.

Conference Name:

Powertrain & Fluid Systems Conference & Exhibition (2005-10-24 : San Antonio, Texas, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

This paper focuses onto mixture formation issues of the Directstart of a gasoline direct injection engine.Regarding the starterless Directstart, id est an engine start through targeted injection and ignition timing without the help of an electrical starter, engine tests show that there exists a large room for improvements by attending the mixture formation of the first combustion.The conditions for the first combustion are very unusual: ambient pressure, nearly the same fuel, engine and charge temperature, no piston movement and only spray induced turbulence. Furthermore, engine tests show that the mixture formation changes with the engine temperature.This paper analyzes the mixture formation of the first combustion for different engine conditions by means of engine measurements and both optical measurements in a spray chamber and simulations performed by the fast response 3D-CFD-Tool QuickSim of IVK/FKFS. In particular, the differences between single and multiple injections are evaluated

Notes:

Vendor supplied data

Publisher Number:

2005-01-3686

Access Restriction:

Restricted for use by site license