## In reciprocating engine the crank is 250 mm long and connecting rod is 1000 mm long. ..........

**Solution of problem on Reciprocating Engine :**

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**Solution of problem on Reciprocating Engine :**

**Steps in Klein’s construction :**

A turning moment diagram for a four stroke cycle internal combustion engine, we know that in a four stroke cycle internal combustion engine, there is one working stroke after a crank has turned through two revolution i.e.7200 . Since the pressure inside the engine cylinder is less than the atmospheric pressure during suction stroke therefore a negative loop is formed. During the compression stroke, the work is done on gases, therefore a higher negative loop is obtained.

Calculations:

i) Velocity of crank AO:

V_{AO} = (r X ω ) X (480 X 20)

a_{ab } = l(ab) X Scale = 4.3 X 40 X 10^{3}

a_{ab} = 172 X 10 mm/sec^{2}