Test Stand for Single Cylinder Engines 7.5kW.
Test Stand for Single Cylinder Engines 7.5kW
Setting up a power
test stand for internal combustion engines with a power output of up to
7.5kW requires two main components: as the control and load unit and a
choice of test engine: four-stroke petrol engine , two-stroke petrol
engine and two four-stroke diesel engines air-cooled with direct
injection, water-cooled with indirect injection).
The main
function of the is to provide the required braking power. This is
generated by an air-cooled asynchronous motor with a regenerative
feedback unit. The braking torque can be precisely adjusted using a
frequency converter. It is measured indirectly using a force transducer.
For this purpose, the entire brake system is mounted in floating
bearings.
The test engine is mounted on a vibration insulated
base plate and connected to the asynchronous motor. A large steel
cylinder fitted below the plate acts as a damping mass and ensures that
the system is in a stable condition. The asynchronous motor is initially
used as a starting mechanism for the test engine. As soon as the test
engine is running, the asynchronous motor and regenerative feedback unit
act as a brake unit for applying a load to the combustion engine. The
braking power is fed back into the electrical system.
The lower section of the mobile laboratory frame contains fuel tanks and a quietening vessel for the intake air.
The
control cabinet contains digital displays for the speed, torque and
temperatures (one display for cooling water - inlet and outlet – and one
display for exhaust gas, fuel and intake air). Pressure gauges indicate
negative intake pressure and air consumption. All measuring signals are
present in digital form and can be stored and processed using the PC
data acquisition function supplied. Data is transmitted to the PC using a
USB interface.
