Formulas for displacement of piston & Angular velocity of connecting rod - Theory of Machines - 1

Q.  Match the following Group 1 items with Group 2 items

1. Displacement of piston -------------------------------------- A. - (ω2 /n) sin θ
2. Angular velocity of connecting rod ----------------------- B. [ω r (sin θ + sin 2θ / 2n)]
3. Angular acceleration of connecting rod ------------------ C. r [1 + n – cos θ - √(n2 – sin2 θ)]
4. Velocity of piston --------------------------------------------- D. ω cos θ / √( n2 – sin2 θ)

- Published on 06 Aug 15

a. 1 – A, 2 – C, 3 – D, 4 - B
b. 1 – D, 2 – B, 3 – A, 4 - C
c. 1 – C, 2 – D, 3 – A, 4 - B
d. 1 – C, 2 – A, 3 – D, 4 - B

ANSWER: 1 – C, 2 – D, 3 – A, 4 - B
 

    Discussion

  • Sravanthi   -Posted on 21 Oct 15
    Connecting rod

    - The connecting rod connects piston to the crankshaft, in reciprocating piston engine. It transfers motion from the piston to crankshaft.

    - Connecting rods convert rotating motion into reciprocating motion.

    - In internal combustion engines, connecting rods are made of steel for production engines.

    Piston displacement

    - The piston moves 2 x stroke of the piston, when the crankshaft rotates through 180° i.e from Top Dead Centre (TDC) to Bottom Dead Centre (BDC).

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