D-Series – Revolutionary technology in single cylinder

The Hatz D series is best suited for challenging tasks. It is characterized by high power and the unique design in particular. Thus, with 11.2 kW, the 1D90 engine is the highest performance single-cylinder diesel engine in the world. A compensation weight on the flywheel side crank arm as well as balance weights cast in the flywheel ensure the special quiet running of the D series. Optionally available counter-rotating balance shafts even ensure 100% 1st-order counter balance.

  • Power from 3.7 kW to 7.5 kW
  • Max. Torque 24.8 Nm
  • powerful and robust
  • Direct injection
  • EPA Tier IV final and EU Stage V certified


design type

  • air-cooled single-cylinder 4-stroke diesel engine
  • Cylinder arranged vertically
  • Die-cast aluminum crankcase
  • Cast iron cylinder
  • Crankshaft and connecting rod with sliding bearings
  • Circulating pressure lubrication with fine filter in the main flow
  • Valve control via rocker arm, bumpers, rocker arm and camshaft
  • Cooling fan and generator integrated in the flywheel


  • high degree of customization through numerous options
  • low fuel consumption
  • Most powerful single-cylinder diesel engine series
  • long lifetime
  • easy to maintain
  • closed crankcase ventilation

performance curves