Question

A six-cylinder in-line four stroke internal combustion engine has equal reciprocating masses and crank spacing. Its firing order is 1-2-3-4-5-6. Investigate the force and moment balancing.

1. Draw a diagram to show cylinders’ layout with a reference plane for moments.

2. Draw diagrams to show primary and secondary positions of the cranks respectively.

3. Set up a table with (mr), (mrx), ?, 2?.

4. Draw primary and secondary force polygons and see if the forces are balanced. Scale:

. 5- Draw primary and secondary moment polygons and see if the moments are balanced. Scale

6- Calculate un balanced forces or momemnts

Answer 1

AND