Calculating Maximum Inertial and Connecting Rod Forces in a Piston Mechanism

[jonnygeordie]

Ok so here's the question I am 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.

I know
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. I am sure once i have that then the rest will fall into place

 

[malemdk]

You can find solution to this problem in theory mechanism and machines textbooks