This test stand measures the power output of internal combustion engines delivering up to 7,5kW. The complete test stand consists of two main elements: The CT 110 as the control and load unit and a choice of engine: four-stroke petrol engine (CT 100.20), two-stroke petrol engine (CT 100.21) and two four-stroke diesel engines (CT 100.22, air-cooled with direct injection; CT 100.23, water-cooled with indirect injection).
  The main function of the CT 110 is to provide the required braking power. The brake unit is an air-cooled asynchronous motor with a regenerative feedback unit. The torque and speed are generated by way of a frequency converter. The regenerative feedback of the braking energy into the system provides for highly energy-efficient operation of the test stand. The torque is measured by means of a suspended brake unit and force sensor.
  The engine is mounted on a vibration-insulated base plate and connected to the asynchronous motor. The mass of the base plate in conjunction with the soft bearing support ensures that the test stand runs very smoothly, so there is no need for a solid foundation.
  The asynchronous motor is initially used to start the engine. As soon as the engine is running, the asynchronous motor and regenerative feedback unit act as a brake unit for applying a load to the engine. The braking power is fed back into the electrical system.
  The lower section of the mobile frame contains fuel tanks and a quietening vessel for the intake air.
  The air consumption is measured by way of a measuring nozzle. The fuel consumption is measured by way of the level in the vertical pipe.
  The switch cabinet contains digital displays for the speed, torque and temperatures (one display for engine cooling water inlet and outlet and one display for exhaust gas, fuel and intake air). Pressure gauges indicate negative intake pressure and air consumption. The measured values are transmitted directly to a PC via USB. The data acquisition software is included.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
 

In conjunction with an engine (CT 100.20 - CT 100.23)
- Plotting of torque and power curves
- Determination of specific fuel consumption
- Determination of volumetric efficiency and lambda

  (fuel-air ratio)

- Determination of the frictional power of the engine
  (in passive mode)