Question

Inertia force acting on the connecting rod cap is given by?

(a) Pi=mrω^2 r(θ+\(\frac{cos2\theta}{n_1})\)

(b) Pi=mrω^2 r(cosθ+\(\frac{sin2\theta}{n_1})\)

(c) Pi=mrω^2 r(cosθ+\(\frac{cos2\theta}{n_1})\)

(d) Pi=mrω^2 r(secθ+\(\frac{cos2\theta}{n_1})\)

The question was posed to me by my school principal while I was bunking the class.

The above asked question is from IC Engine in division Design of IC Engine Components of Automotive Engine Design

Answer 1

Right choice is (c) Pi=mrω^2 r(cosθ+\(\frac{cos2\theta}{n_1})\)

The explanation: Pi=mrω^2 r(cosθ+\(\frac{cos2\theta}{n_1})\)is the right answer where Pi is the inertia force, mr is the mass of reciprocating parts, ω is the angular velocity of the crank, r is the crank radius, n1 is the ratio of L/r and θ is the angle of inclination.