Bayerische Motoren Werke Aktiengesellschaft

Zeuna-Staker Gmbh & Co., Kg

Bernhard Grescher

Enrique Santiago

Rudolf Flierl

Ernst Krieger

Alfons Bohm

Wolfgang Fanese

Juergen Bloedel-Pawlik

A tube junction is produced having at least two inlets and an outlet, and at least one bend between the two inlets by providing a forging die with a first recess contoured to hold a bent tube piece. A second recess opens into the first recess and, terminates in a moveable counterpunch. A tube piece having two inlets is bent to bring the two inlets into positions relative to each other generally similar to relative positions of the inlets in a finished tube junction. The bent tube piece is placed within the forging die, and pressurized internally to bulge the tube piece wall into the second recess and form a neck for the outlet. Motion of the counterpunch away from the first recess is controlled as the neck forms under pressure in the second recess.

Method for producing an exhaust gas manifold for a multi-cylinder engine

Emission control system for internal-combustion engines

Growing community of inventors

Fischach, Germany

Bernhard Grescher