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industrial diesel engines

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 3.3 to 7.0 kW
  • max. torque 22.5 Nm
  • High performance and robust
  • Direct injection method
  • Certified to EU Stage V


  • Air cooled single-cylinder 4-stroke diesel engine
  • Cylinder arranged vertically
  • Crankcase made from die-cast light alloy
  • Gray cast iron cylinder
  • Crankshaft and conrod on plain bearing
  • Pressurized lubrication with fine filter in the main flow
  • Valve timing via rocker arm, push rods, finger follower and camshaft
  • Cooling fan and alternator integrated in flywheel


  • High degree of customization thanks to numerous options
  • Lower fuel consumption
  • High performance single-cylinder diesel engine series
  • Long service life
  • Maintenance friendly