Armin Kölmel

Analysis of working processes and efficiency assessment of hand-held power tools

Roland Kirchberger, Alexander Trattner, Stephan Schmidt, 2016 .

Future Engine Technology in Hand-Held Power Tools

Roland Kirchberger, Stephan Schmidt, Alexander Trattner, 2012 .

Potential of fuel injection in two-stroke engines for hand-held power tools

Roland Kirchberger, Stephan Schmidt, Alexander Trattner, 2014 .

Advantages and challenges of lean operation of two-stroke engines for hand-held power tools

Roland Kirchberger, Stephan Schmidt, Stephan Meyer, 2014 .

Ion-Current Measurement in Small Two-Stroke SI Engines

Kai W. Beck, Armin Kölmel, Tim Gegg, 2008 .