Unbalance in Multicylinder Engines – In-line, V-twin and Radial Engines; Balancing Techniques

Module 4 : Unbalance in Multicylinder Engines – In-line, V-twin and Radial Engines; Balancing Techniques.

Lecture 1 : Unbalance in Multicylinder Engines – In-line, V-twin and Radial Engines; Balancing Techniques.

	It is important to note that this force is directed ALONG the line of reciprocation of the masses and is the orientation of the crank measured from this line of reciprocation.
	For example, as shown in Fig. 4.2, if the line of reciprocating motion (axis of cylinder) is arbitrarily directed, we can resolve this force into components along Cartesian coordinate axes X- and Y. In the subsequent discussion of the state of balance of multi-cylinder engines, with multiple cylinders arranged in a particular configuration, it is therefore only required to find the X- and Y- components of inertia forces of each cylinder and perform a vector addition of all the component forces and their moments to get the resultant unbalance force/moment for the whole engine.
	Figure 4.2 Arbitrarily oriented single cylinder engine