Patent Number: 6,308,558

Title: Method for checking the effect of swirl ducts in multi-cylinder internal combustion engines, in particular direct injection engine

Abstract: In a method used for checking the effect of swirl ducts in multicylinder internal combustion engines, especially engines with direct injection, swirl numbers are determined with a swirl measuring device in a simultaneous cylinder that can be connected to a cylinder head and related to an engine-specific swirl tolerance band. With a sharp deviation of the swirl number from the swirl tolerance band as a function of the swirl number outside the swirl tolerance band, the corresponding swirl duct and/or filling channel in the cylinder head is subsequently made or designed to be smaller or larger in cross section in one duct section.

Inventors: Niedereder; Werner (Steyr, AT), Ratzberger; Reinhard (Steyr, AT), Dworschak; Johannes (Haratzmuellerstrasse, AT)

Assignee: Bayerische Motoren Werke Aktiengesellschaft

International Classification: F02B 31/00 (20060101); G01M 015/00 ()

Expiration Date: 10/30/2018