|Aug17-09, 08:32 AM||#1|
Inertial forces in pistons
Ok so here's the question im looking at.
A piston and cylinder mechanism is connected to a crank shaft. The crank is 50mm long, the connecting rod 250 mm long and the piston has a mass of 150g. If the engine speed is w rad/sec and the crankshaft torque T Nm calculate:-
i) Max inertial force between the piston and connecting rod
ii) Max. force in the connecting rod
My question is where to start.
Angular momentum = Inertia x w
Force = Torque/ distance
Torque = angular momentum x Inertia
Now for the seond pat of the question, combining two of the above equations i get
Force = (angular momentum X inertia) / distance.
The problem is i have no idea where to start, if someone could give me a startpoint i would be greatfull. Im sure once i have that then the rest will fall into place
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