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As the engine speed increases, which force acts against the spring tension?

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in Automotive Engine Design by (137k points)
As the engine speed increases, which force acts against the spring tension?

(a) Rolling force

(b) Friction force

(c) Centrifugal force

(d) Both rolling and friction force

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This interesting question is from Diesel Engine Fuel Supply System in portion Diesel Engine Fuel Supply System of Automotive Engine Design

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The correct option is (c) Centrifugal force

Explanation: As the engine speed increases, the centrifugal force due to weights acts against the spring tension. Once the former exceeds the latter, the weights fly apart, causing the other ends of the bell crank levers to raise the sleeve.

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