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This is the Focus Applied Technologies Baby Chassis Dynamometer for motorcycles.
The wheel of the vehicle undertest sits here in between these two rollers.
The front roller is the idler roller preventing the the vehicle from running away,
While the back roller, the driven roller transmiting torque through this belt to the dynamometer.
It is suspended on the bearings before and aft and torque is measured from this load
cell. Speed is measured from the speed pick up on
the main roller, Both torque an speed are reported to the dynamometer
controller which is also responsible of controlling the load.
Motorcycle is now mounted on the chassis dynamometer. we are operating speed control mode at 50Kph,
I will increase the throttle, the torque will increase but the speed will maintained steady
at 50 kph. I will begin reducing the speed setpoint until
the clutch slips. (engine started)
We are now at targeted speed, so the torque begin to increase.
set point, slowly the line goes down. untill the clutch slips
this trace is the torque curve of the engine. That is the clutch slips indicated by the
sharp increase in torque.
Looking at the log we ran just now, This is the speed data and the torque data,
I have drawn torque as the function of engine speed down here.
That is the motorcycle's torque curve. On the bottom is the dynamometer friction
torque. And the top is maximum dynamomter torque,
indicating that we can absorb much more torque than produced.