function of the reciprocating engine is to
convert the reciprocating motion into rotary
motion. It is a simplest from of single slider
crank chain mechanism. In reciprocating engine
there is one sliding pair and three turning
pairs. In figure there are three turning pairs
and the sliding pair is formed between the cross
head and the guides. Link 1 is fixed (frame).
Link 2 will act as a crank, which rotates. Link
3 is a connecting rod and link 4 is a crosshead.