Thermodynamics Laboratory Equipment

Single Cylinder Four Stroke Petrol Engine Test Bench



The “LabTek” experimental test stand, which includes a drive and brake unit, the four-stroke petrol engine is highly suitable for use in teaching the fundamentals of engine functioning and measurement.

The engine used here is an air-cooled single-cylinder four-stroke petrol engine with external carburation. The engine is started and slowed down by an electric motor mounted in the  unit. A flywheel fan affects the air-cooling. The brake unit is connected by way of a elastic claw coupling.

The engine is prepared for measurement of the cylinder pressure for indication. It includes a sensor to measure the exhaust gas temperature and a connection to measure the intake pressure. Both sensors, ignition cut-off and fuel supply are connected to the  test stand.

The full load and partial load characteristic curves of the engine are plotted in experiments.

Single Cylinder Four Stroke Petrol Engine Test Bench


  • familiarization with a four-stroke petrol engine
  • plotting of torque and power curves
  • Bhp Measurement
  • Brake Thermal Efficiency
  • Fuel Consumption Measurement
  • Air Intake Measurement
  • determination of specific fuel consumption
  • determination of volumetric efficiency and lambda (fuel-air ratio)
  • determination of the frictional power of the engine



Air-cooled single-cylinder petrol engine

  • power output: 7,5kW at 3000min-1
  • bore: 89mm
  • stroke: 63mm



  • L x W x H: 1000x 800x 1200mm
  • Weight (approx.): 120kg

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