Andreas Stihl Ag Co. Kg

Klaus Bröckel

Heiko Rosskamp

Helmar Amend

Igor Klaric

Hartmut Fischer

A cylinder housing () is cast with a cylinder wall () in the making of a cylinder for an internal combustion engine. The cylinder wall delimits an interior space () for accommodating a reciprocating piston and, thereafter, a control window () is machined into the cylinder wall () as an opening of a transfer channel () into the interior space (). A two-stage machining for forming the control window () is provided in order to make possible a rapid and cost effective manufacture of the cylinder. In a first step with a work tool () having a rotating primary movement (), a breakthrough () is machined into the cylinder wall () and, in a second step with a work tool, the breakthrough () is widened to the wanted dimensions of the control window ().

Growing community of inventors

Sao Leopoldo, Brazil

Klaus Bröckel