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The fuel is injected into the cylinder in diesel engine when the piston is ____________

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The fuel is injected into the cylinder in diesel engine when the piston is ____________

(a) Exactly at TDC after compression stroke

(b) Exactly at the BDC before compression stroke

(c) Approaching TDC during compression stroke

(d) Approaching TDC during exhaust stroke

I had been asked this question during an online interview.

I'm obligated to ask this question of Energy Cycle topic in division Internal Combustion Engines of Automobile Engineering

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Best answer
Right option is (c) Approaching TDC during compression stroke

Easiest explanation: Fuel is injected when piston is approaching TDC during compression stroke.

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