Question

What do you mean by primary and secondary unbalance in reciprocating engines?

Answer 1

Engine balance refers to those factors in the design, production, engine tuning, maintenance and the operation of an engine that benefit from being balanced. Major considerations are:

Balancing of structural and operational elements within an engine
Longevity and performance
Power and efficiency
Performance and weight/size/cost
Environmental cost and utility
Noise/vibration and performance
This article is currently limited to structural and operational balance within an engine in general, and balancing of piston engine components in particular.

Answer 2

Answer:

The secondary balancing of reciprocating mass is defined as the given below. Secondary force. Primary forces must balance i.e., primary force polygon is enclosed. Primary couples must balance i.e., primary couple polygon is enclosed.

The secondary balancing of reciprocating mass is defined as the given below. Secondary force. Primary forces must balance i.e., primary force polygon is enclosed. Primary couples must balance i.e., primary couple polygon is enclosed.