General Studies · IC Engines
In most Spark Ignition (SI) engines, the intake valve opens a few degrees before the Top Dead Center (TDC) on the exhaust stroke primarily to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1increase the engine's compression ratio
- 2ensure complete combustion of the fuel-air mixture
- 3ensure that the intake valve is fully open when the piston reaches the TDC
- 4allow for better scavenging of exhaust gases✓
Correct answer
allow for better scavenging of exhaust gases
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